diff options
Diffstat (limited to 'vendor/github.com/fsnotify')
30 files changed, 1877 insertions, 1612 deletions
diff --git a/vendor/github.com/fsnotify/fsnotify/.cirrus.yml b/vendor/github.com/fsnotify/fsnotify/.cirrus.yml index ffc7b992b..f4e7dbf37 100644 --- a/vendor/github.com/fsnotify/fsnotify/.cirrus.yml +++ b/vendor/github.com/fsnotify/fsnotify/.cirrus.yml @@ -1,7 +1,7 @@ freebsd_task: name: 'FreeBSD' freebsd_instance: - image_family: freebsd-13-2 + image_family: freebsd-14-1 install_script: - pkg update -f - pkg install -y go @@ -9,5 +9,6 @@ freebsd_task: # run tests as user "cirrus" instead of root - pw useradd cirrus -m - chown -R cirrus:cirrus . - - FSNOTIFY_BUFFER=4096 sudo --preserve-env=FSNOTIFY_BUFFER -u cirrus go test -parallel 1 -race ./... - - sudo --preserve-env=FSNOTIFY_BUFFER -u cirrus go test -parallel 1 -race ./... + - FSNOTIFY_BUFFER=4096 sudo --preserve-env=FSNOTIFY_BUFFER -u cirrus go test -parallel 1 -race ./... + - sudo --preserve-env=FSNOTIFY_BUFFER -u cirrus go test -parallel 1 -race ./... + - FSNOTIFY_DEBUG=1 sudo --preserve-env=FSNOTIFY_BUFFER -u cirrus go test -parallel 1 -race -v ./... diff --git a/vendor/github.com/fsnotify/fsnotify/.editorconfig b/vendor/github.com/fsnotify/fsnotify/.editorconfig deleted file mode 100644 index fad895851..000000000 --- a/vendor/github.com/fsnotify/fsnotify/.editorconfig +++ /dev/null @@ -1,12 +0,0 @@ -root = true - -[*.go] -indent_style = tab -indent_size = 4 -insert_final_newline = true - -[*.{yml,yaml}] -indent_style = space -indent_size = 2 -insert_final_newline = true -trim_trailing_whitespace = true diff --git a/vendor/github.com/fsnotify/fsnotify/.gitattributes b/vendor/github.com/fsnotify/fsnotify/.gitattributes deleted file mode 100644 index 32f1001be..000000000 --- a/vendor/github.com/fsnotify/fsnotify/.gitattributes +++ /dev/null @@ -1 +0,0 @@ -go.sum linguist-generated diff --git a/vendor/github.com/fsnotify/fsnotify/.gitignore b/vendor/github.com/fsnotify/fsnotify/.gitignore index 391cc076b..daea9dd6d 100644 --- a/vendor/github.com/fsnotify/fsnotify/.gitignore +++ b/vendor/github.com/fsnotify/fsnotify/.gitignore @@ -5,3 +5,6 @@ # Output of go build ./cmd/fsnotify /fsnotify /fsnotify.exe + +/test/kqueue +/test/a.out diff --git a/vendor/github.com/fsnotify/fsnotify/CHANGELOG.md b/vendor/github.com/fsnotify/fsnotify/CHANGELOG.md index e0e575754..fa854785d 100644 --- a/vendor/github.com/fsnotify/fsnotify/CHANGELOG.md +++ b/vendor/github.com/fsnotify/fsnotify/CHANGELOG.md @@ -1,8 +1,36 @@ # Changelog -Unreleased ----------- -Nothing yet. +1.8.0 2023-10-31 +---------------- + +### Additions + +- all: add `FSNOTIFY_DEBUG` to print debug logs to stderr ([#619]) + +### Changes and fixes + +- windows: fix behaviour of `WatchList()` to be consistent with other platforms ([#610]) + +- kqueue: ignore events with Ident=0 ([#590]) + +- kqueue: set O_CLOEXEC to prevent passing file descriptors to children ([#617]) + +- kqueue: emit events as "/path/dir/file" instead of "path/link/file" when watching a symlink ([#625]) + +- inotify: don't send event for IN_DELETE_SELF when also watching the parent ([#620]) + +- inotify: fix panic when calling Remove() in a goroutine ([#650]) + +- fen: allow watching subdirectories of watched directories ([#621]) + +[#590]: https://github.com/fsnotify/fsnotify/pull/590 +[#610]: https://github.com/fsnotify/fsnotify/pull/610 +[#617]: https://github.com/fsnotify/fsnotify/pull/617 +[#619]: https://github.com/fsnotify/fsnotify/pull/619 +[#620]: https://github.com/fsnotify/fsnotify/pull/620 +[#621]: https://github.com/fsnotify/fsnotify/pull/621 +[#625]: https://github.com/fsnotify/fsnotify/pull/625 +[#650]: https://github.com/fsnotify/fsnotify/pull/650 1.7.0 - 2023-10-22 ------------------ diff --git a/vendor/github.com/fsnotify/fsnotify/CONTRIBUTING.md b/vendor/github.com/fsnotify/fsnotify/CONTRIBUTING.md index ea379759d..e4ac2a2ff 100644 --- a/vendor/github.com/fsnotify/fsnotify/CONTRIBUTING.md +++ b/vendor/github.com/fsnotify/fsnotify/CONTRIBUTING.md @@ -1,7 +1,7 @@ Thank you for your interest in contributing to fsnotify! We try to review and merge PRs in a reasonable timeframe, but please be aware that: -- To avoid "wasted" work, please discus changes on the issue tracker first. You +- To avoid "wasted" work, please discuss changes on the issue tracker first. You can just send PRs, but they may end up being rejected for one reason or the other. @@ -20,6 +20,124 @@ platforms. Testing different platforms locally can be done with something like Use the `-short` flag to make the "stress test" run faster. +Writing new tests +----------------- +Scripts in the testdata directory allow creating test cases in a "shell-like" +syntax. The basic format is: + + script + + Output: + desired output + +For example: + + # Create a new empty file with some data. + watch / + echo data >/file + + Output: + create /file + write /file + +Just create a new file to add a new test; select which tests to run with +`-run TestScript/[path]`. + +script +------ +The script is a "shell-like" script: + + cmd arg arg + +Comments are supported with `#`: + + # Comment + cmd arg arg # Comment + +All operations are done in a temp directory; a path like "/foo" is rewritten to +"/tmp/TestFoo/foo". + +Arguments can be quoted with `"` or `'`; there are no escapes and they're +functionally identical right now, but this may change in the future, so best to +assume shell-like rules. + + touch "/file with spaces" + +End-of-line escapes with `\` are not supported. + +### Supported commands + + watch path [ops] # Watch the path, reporting events for it. Nothing is + # watched by default. Optionally a list of ops can be + # given, as with AddWith(path, WithOps(...)). + unwatch path # Stop watching the path. + watchlist n # Assert watchlist length. + + stop # Stop running the script; for debugging. + debug [yes/no] # Enable/disable FSNOTIFY_DEBUG (tests are run in + parallel by default, so -parallel=1 is probably a good + idea). + + touch path + mkdir [-p] dir + ln -s target link # Only ln -s supported. + mkfifo path + mknod dev path + mv src dst + rm [-r] path + chmod mode path # Octal only + sleep time-in-ms + + cat path # Read path (does nothing with the data; just reads it). + echo str >>path # Append "str" to "path". + echo str >path # Truncate "path" and write "str". + + require reason # Skip the test if "reason" is true; "skip" and + skip reason # "require" behave identical; it supports both for + # readability. Possible reasons are: + # + # always Always skip this test. + # symlink Symlinks are supported (requires admin + # permissions on Windows). + # mkfifo Platform doesn't support FIFO named sockets. + # mknod Platform doesn't support device nodes. + + +output +------ +After `Output:` the desired output is given; this is indented by convention, but +that's not required. + +The format of that is: + + # Comment + event path # Comment + + system: + event path + system2: + event path + +Every event is one line, and any whitespace between the event and path are +ignored. The path can optionally be surrounded in ". Anything after a "#" is +ignored. + +Platform-specific tests can be added after GOOS; for example: + + watch / + touch /file + + Output: + # Tested if nothing else matches + create /file + + # Windows-specific test. + windows: + write /file + +You can specify multiple platforms with a comma (e.g. "windows, linux:"). +"kqueue" is a shortcut for all kqueue systems (BSD, macOS). + [goon]: https://github.com/arp242/goon [Vagrant]: https://www.vagrantup.com/ diff --git a/vendor/github.com/fsnotify/fsnotify/backend_fen.go b/vendor/github.com/fsnotify/fsnotify/backend_fen.go index 28497f1dd..c349c326c 100644 --- a/vendor/github.com/fsnotify/fsnotify/backend_fen.go +++ b/vendor/github.com/fsnotify/fsnotify/backend_fen.go @@ -1,8 +1,8 @@ //go:build solaris -// +build solaris -// Note: the documentation on the Watcher type and methods is generated from -// mkdoc.zsh +// FEN backend for illumos (supported) and Solaris (untested, but should work). +// +// See port_create(3c) etc. for docs. https://www.illumos.org/man/3C/port_create package fsnotify @@ -12,150 +12,33 @@ import ( "os" "path/filepath" "sync" + "time" + "github.com/fsnotify/fsnotify/internal" "golang.org/x/sys/unix" ) -// Watcher watches a set of paths, delivering events on a channel. -// -// A watcher should not be copied (e.g. pass it by pointer, rather than by -// value). -// -// # Linux notes -// -// When a file is removed a Remove event won't be emitted until all file -// descriptors are closed, and deletes will always emit a Chmod. For example: -// -// fp := os.Open("file") -// os.Remove("file") // Triggers Chmod -// fp.Close() // Triggers Remove -// -// This is the event that inotify sends, so not much can be changed about this. -// -// The fs.inotify.max_user_watches sysctl variable specifies the upper limit -// for the number of watches per user, and fs.inotify.max_user_instances -// specifies the maximum number of inotify instances per user. Every Watcher you -// create is an "instance", and every path you add is a "watch". -// -// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and -// /proc/sys/fs/inotify/max_user_instances -// -// To increase them you can use sysctl or write the value to the /proc file: -// -// # Default values on Linux 5.18 -// sysctl fs.inotify.max_user_watches=124983 -// sysctl fs.inotify.max_user_instances=128 -// -// To make the changes persist on reboot edit /etc/sysctl.conf or -// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check -// your distro's documentation): -// -// fs.inotify.max_user_watches=124983 -// fs.inotify.max_user_instances=128 -// -// Reaching the limit will result in a "no space left on device" or "too many open -// files" error. -// -// # kqueue notes (macOS, BSD) -// -// kqueue requires opening a file descriptor for every file that's being watched; -// so if you're watching a directory with five files then that's six file -// descriptors. You will run in to your system's "max open files" limit faster on -// these platforms. -// -// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to -// control the maximum number of open files, as well as /etc/login.conf on BSD -// systems. -// -// # Windows notes -// -// Paths can be added as "C:\path\to\dir", but forward slashes -// ("C:/path/to/dir") will also work. -// -// When a watched directory is removed it will always send an event for the -// directory itself, but may not send events for all files in that directory. -// Sometimes it will send events for all times, sometimes it will send no -// events, and often only for some files. -// -// The default ReadDirectoryChangesW() buffer size is 64K, which is the largest -// value that is guaranteed to work with SMB filesystems. If you have many -// events in quick succession this may not be enough, and you will have to use -// [WithBufferSize] to increase the value. -type Watcher struct { - // Events sends the filesystem change events. - // - // fsnotify can send the following events; a "path" here can refer to a - // file, directory, symbolic link, or special file like a FIFO. - // - // fsnotify.Create A new path was created; this may be followed by one - // or more Write events if data also gets written to a - // file. - // - // fsnotify.Remove A path was removed. - // - // fsnotify.Rename A path was renamed. A rename is always sent with the - // old path as Event.Name, and a Create event will be - // sent with the new name. Renames are only sent for - // paths that are currently watched; e.g. moving an - // unmonitored file into a monitored directory will - // show up as just a Create. Similarly, renaming a file - // to outside a monitored directory will show up as - // only a Rename. - // - // fsnotify.Write A file or named pipe was written to. A Truncate will - // also trigger a Write. A single "write action" - // initiated by the user may show up as one or multiple - // writes, depending on when the system syncs things to - // disk. For example when compiling a large Go program - // you may get hundreds of Write events, and you may - // want to wait until you've stopped receiving them - // (see the dedup example in cmd/fsnotify). - // - // Some systems may send Write event for directories - // when the directory content changes. - // - // fsnotify.Chmod Attributes were changed. On Linux this is also sent - // when a file is removed (or more accurately, when a - // link to an inode is removed). On kqueue it's sent - // when a file is truncated. On Windows it's never - // sent. +type fen struct { Events chan Event - - // Errors sends any errors. - // - // ErrEventOverflow is used to indicate there are too many events: - // - // - inotify: There are too many queued events (fs.inotify.max_queued_events sysctl) - // - windows: The buffer size is too small; WithBufferSize() can be used to increase it. - // - kqueue, fen: Not used. Errors chan error mu sync.Mutex port *unix.EventPort - done chan struct{} // Channel for sending a "quit message" to the reader goroutine - dirs map[string]struct{} // Explicitly watched directories - watches map[string]struct{} // Explicitly watched non-directories + done chan struct{} // Channel for sending a "quit message" to the reader goroutine + dirs map[string]Op // Explicitly watched directories + watches map[string]Op // Explicitly watched non-directories } -// NewWatcher creates a new Watcher. -func NewWatcher() (*Watcher, error) { - return NewBufferedWatcher(0) +func newBackend(ev chan Event, errs chan error) (backend, error) { + return newBufferedBackend(0, ev, errs) } -// NewBufferedWatcher creates a new Watcher with a buffered Watcher.Events -// channel. -// -// The main use case for this is situations with a very large number of events -// where the kernel buffer size can't be increased (e.g. due to lack of -// permissions). An unbuffered Watcher will perform better for almost all use -// cases, and whenever possible you will be better off increasing the kernel -// buffers instead of adding a large userspace buffer. -func NewBufferedWatcher(sz uint) (*Watcher, error) { - w := &Watcher{ - Events: make(chan Event, sz), - Errors: make(chan error), - dirs: make(map[string]struct{}), - watches: make(map[string]struct{}), +func newBufferedBackend(sz uint, ev chan Event, errs chan error) (backend, error) { + w := &fen{ + Events: ev, + Errors: errs, + dirs: make(map[string]Op), + watches: make(map[string]Op), done: make(chan struct{}), } @@ -171,27 +54,30 @@ func NewBufferedWatcher(sz uint) (*Watcher, error) { // sendEvent attempts to send an event to the user, returning true if the event // was put in the channel successfully and false if the watcher has been closed. -func (w *Watcher) sendEvent(name string, op Op) (sent bool) { +func (w *fen) sendEvent(name string, op Op) (sent bool) { select { - case w.Events <- Event{Name: name, Op: op}: - return true case <-w.done: return false + case w.Events <- Event{Name: name, Op: op}: + return true } } // sendError attempts to send an error to the user, returning true if the error // was put in the channel successfully and false if the watcher has been closed. -func (w *Watcher) sendError(err error) (sent bool) { - select { - case w.Errors <- err: +func (w *fen) sendError(err error) (sent bool) { + if err == nil { return true + } + select { case <-w.done: return false + case w.Errors <- err: + return true } } -func (w *Watcher) isClosed() bool { +func (w *fen) isClosed() bool { select { case <-w.done: return true @@ -200,8 +86,7 @@ func (w *Watcher) isClosed() bool { } } -// Close removes all watches and closes the Events channel. -func (w *Watcher) Close() error { +func (w *fen) Close() error { // Take the lock used by associateFile to prevent lingering events from // being processed after the close w.mu.Lock() @@ -213,60 +98,21 @@ func (w *Watcher) Close() error { return w.port.Close() } -// Add starts monitoring the path for changes. -// -// A path can only be watched once; watching it more than once is a no-op and will -// not return an error. Paths that do not yet exist on the filesystem cannot be -// watched. -// -// A watch will be automatically removed if the watched path is deleted or -// renamed. The exception is the Windows backend, which doesn't remove the -// watcher on renames. -// -// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special -// filesystems (/proc, /sys, etc.) generally don't work. -// -// Returns [ErrClosed] if [Watcher.Close] was called. -// -// See [Watcher.AddWith] for a version that allows adding options. -// -// # Watching directories -// -// All files in a directory are monitored, including new files that are created -// after the watcher is started. Subdirectories are not watched (i.e. it's -// non-recursive). -// -// # Watching files -// -// Watching individual files (rather than directories) is generally not -// recommended as many programs (especially editors) update files atomically: it -// will write to a temporary file which is then moved to to destination, -// overwriting the original (or some variant thereof). The watcher on the -// original file is now lost, as that no longer exists. -// -// The upshot of this is that a power failure or crash won't leave a -// half-written file. -// -// Watch the parent directory and use Event.Name to filter out files you're not -// interested in. There is an example of this in cmd/fsnotify/file.go. -func (w *Watcher) Add(name string) error { return w.AddWith(name) } +func (w *fen) Add(name string) error { return w.AddWith(name) } -// AddWith is like [Watcher.Add], but allows adding options. When using Add() -// the defaults described below are used. -// -// Possible options are: -// -// - [WithBufferSize] sets the buffer size for the Windows backend; no-op on -// other platforms. The default is 64K (65536 bytes). -func (w *Watcher) AddWith(name string, opts ...addOpt) error { +func (w *fen) AddWith(name string, opts ...addOpt) error { if w.isClosed() { return ErrClosed } - if w.port.PathIsWatched(name) { - return nil + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s AddWith(%q)\n", + time.Now().Format("15:04:05.000000000"), name) } - _ = getOptions(opts...) + with := getOptions(opts...) + if !w.xSupports(with.op) { + return fmt.Errorf("%w: %s", xErrUnsupported, with.op) + } // Currently we resolve symlinks that were explicitly requested to be // watched. Otherwise we would use LStat here. @@ -283,7 +129,7 @@ func (w *Watcher) AddWith(name string, opts ...addOpt) error { } w.mu.Lock() - w.dirs[name] = struct{}{} + w.dirs[name] = with.op w.mu.Unlock() return nil } @@ -294,26 +140,22 @@ func (w *Watcher) AddWith(name string, opts ...addOpt) error { } w.mu.Lock() - w.watches[name] = struct{}{} + w.watches[name] = with.op w.mu.Unlock() return nil } -// Remove stops monitoring the path for changes. -// -// Directories are always removed non-recursively. For example, if you added -// /tmp/dir and /tmp/dir/subdir then you will need to remove both. -// -// Removing a path that has not yet been added returns [ErrNonExistentWatch]. -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) Remove(name string) error { +func (w *fen) Remove(name string) error { if w.isClosed() { return nil } if !w.port.PathIsWatched(name) { return fmt.Errorf("%w: %s", ErrNonExistentWatch, name) } + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s Remove(%q)\n", + time.Now().Format("15:04:05.000000000"), name) + } // The user has expressed an intent. Immediately remove this name from // whichever watch list it might be in. If it's not in there the delete @@ -346,7 +188,7 @@ func (w *Watcher) Remove(name string) error { } // readEvents contains the main loop that runs in a goroutine watching for events. -func (w *Watcher) readEvents() { +func (w *fen) readEvents() { // If this function returns, the watcher has been closed and we can close // these channels defer func() { @@ -382,17 +224,19 @@ func (w *Watcher) readEvents() { continue } + if debug { + internal.Debug(pevent.Path, pevent.Events) + } + err = w.handleEvent(&pevent) - if err != nil { - if !w.sendError(err) { - return - } + if !w.sendError(err) { + return } } } } -func (w *Watcher) handleDirectory(path string, stat os.FileInfo, follow bool, handler func(string, os.FileInfo, bool) error) error { +func (w *fen) handleDirectory(path string, stat os.FileInfo, follow bool, handler func(string, os.FileInfo, bool) error) error { files, err := os.ReadDir(path) if err != nil { return err @@ -418,7 +262,7 @@ func (w *Watcher) handleDirectory(path string, stat os.FileInfo, follow bool, ha // bitmap matches more than one event type (e.g. the file was both modified and // had the attributes changed between when the association was created and the // when event was returned) -func (w *Watcher) handleEvent(event *unix.PortEvent) error { +func (w *fen) handleEvent(event *unix.PortEvent) error { var ( events = event.Events path = event.Path @@ -510,15 +354,9 @@ func (w *Watcher) handleEvent(event *unix.PortEvent) error { } if events&unix.FILE_MODIFIED != 0 { - if fmode.IsDir() { - if watchedDir { - if err := w.updateDirectory(path); err != nil { - return err - } - } else { - if !w.sendEvent(path, Write) { - return nil - } + if fmode.IsDir() && watchedDir { + if err := w.updateDirectory(path); err != nil { + return err } } else { if !w.sendEvent(path, Write) { @@ -543,7 +381,7 @@ func (w *Watcher) handleEvent(event *unix.PortEvent) error { return nil } -func (w *Watcher) updateDirectory(path string) error { +func (w *fen) updateDirectory(path string) error { // The directory was modified, so we must find unwatched entities and watch // them. If something was removed from the directory, nothing will happen, // as everything else should still be watched. @@ -563,10 +401,8 @@ func (w *Watcher) updateDirectory(path string) error { return err } err = w.associateFile(path, finfo, false) - if err != nil { - if !w.sendError(err) { - return nil - } + if !w.sendError(err) { + return nil } if !w.sendEvent(path, Create) { return nil @@ -575,7 +411,7 @@ func (w *Watcher) updateDirectory(path string) error { return nil } -func (w *Watcher) associateFile(path string, stat os.FileInfo, follow bool) error { +func (w *fen) associateFile(path string, stat os.FileInfo, follow bool) error { if w.isClosed() { return ErrClosed } @@ -593,34 +429,34 @@ func (w *Watcher) associateFile(path string, stat os.FileInfo, follow bool) erro // cleared up that discrepancy. The most likely cause is that the event // has fired but we haven't processed it yet. err := w.port.DissociatePath(path) - if err != nil && err != unix.ENOENT { + if err != nil && !errors.Is(err, unix.ENOENT) { return err } } - // FILE_NOFOLLOW means we watch symlinks themselves rather than their - // targets. - events := unix.FILE_MODIFIED | unix.FILE_ATTRIB | unix.FILE_NOFOLLOW - if follow { - // We *DO* follow symlinks for explicitly watched entries. - events = unix.FILE_MODIFIED | unix.FILE_ATTRIB + + var events int + if !follow { + // Watch symlinks themselves rather than their targets unless this entry + // is explicitly watched. + events |= unix.FILE_NOFOLLOW + } + if true { // TODO: implement withOps() + events |= unix.FILE_MODIFIED } - return w.port.AssociatePath(path, stat, - events, - stat.Mode()) + if true { + events |= unix.FILE_ATTRIB + } + return w.port.AssociatePath(path, stat, events, stat.Mode()) } -func (w *Watcher) dissociateFile(path string, stat os.FileInfo, unused bool) error { +func (w *fen) dissociateFile(path string, stat os.FileInfo, unused bool) error { if !w.port.PathIsWatched(path) { return nil } return w.port.DissociatePath(path) } -// WatchList returns all paths explicitly added with [Watcher.Add] (and are not -// yet removed). -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) WatchList() []string { +func (w *fen) WatchList() []string { if w.isClosed() { return nil } @@ -638,3 +474,11 @@ func (w *Watcher) WatchList() []string { return entries } + +func (w *fen) xSupports(op Op) bool { + if op.Has(xUnportableOpen) || op.Has(xUnportableRead) || + op.Has(xUnportableCloseWrite) || op.Has(xUnportableCloseRead) { + return false + } + return true +} diff --git a/vendor/github.com/fsnotify/fsnotify/backend_inotify.go b/vendor/github.com/fsnotify/fsnotify/backend_inotify.go index 921c1c1e4..36c311694 100644 --- a/vendor/github.com/fsnotify/fsnotify/backend_inotify.go +++ b/vendor/github.com/fsnotify/fsnotify/backend_inotify.go @@ -1,8 +1,4 @@ //go:build linux && !appengine -// +build linux,!appengine - -// Note: the documentation on the Watcher type and methods is generated from -// mkdoc.zsh package fsnotify @@ -10,127 +6,20 @@ import ( "errors" "fmt" "io" + "io/fs" "os" "path/filepath" "strings" "sync" + "time" "unsafe" + "github.com/fsnotify/fsnotify/internal" "golang.org/x/sys/unix" ) -// Watcher watches a set of paths, delivering events on a channel. -// -// A watcher should not be copied (e.g. pass it by pointer, rather than by -// value). -// -// # Linux notes -// -// When a file is removed a Remove event won't be emitted until all file -// descriptors are closed, and deletes will always emit a Chmod. For example: -// -// fp := os.Open("file") -// os.Remove("file") // Triggers Chmod -// fp.Close() // Triggers Remove -// -// This is the event that inotify sends, so not much can be changed about this. -// -// The fs.inotify.max_user_watches sysctl variable specifies the upper limit -// for the number of watches per user, and fs.inotify.max_user_instances -// specifies the maximum number of inotify instances per user. Every Watcher you -// create is an "instance", and every path you add is a "watch". -// -// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and -// /proc/sys/fs/inotify/max_user_instances -// -// To increase them you can use sysctl or write the value to the /proc file: -// -// # Default values on Linux 5.18 -// sysctl fs.inotify.max_user_watches=124983 -// sysctl fs.inotify.max_user_instances=128 -// -// To make the changes persist on reboot edit /etc/sysctl.conf or -// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check -// your distro's documentation): -// -// fs.inotify.max_user_watches=124983 -// fs.inotify.max_user_instances=128 -// -// Reaching the limit will result in a "no space left on device" or "too many open -// files" error. -// -// # kqueue notes (macOS, BSD) -// -// kqueue requires opening a file descriptor for every file that's being watched; -// so if you're watching a directory with five files then that's six file -// descriptors. You will run in to your system's "max open files" limit faster on -// these platforms. -// -// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to -// control the maximum number of open files, as well as /etc/login.conf on BSD -// systems. -// -// # Windows notes -// -// Paths can be added as "C:\path\to\dir", but forward slashes -// ("C:/path/to/dir") will also work. -// -// When a watched directory is removed it will always send an event for the -// directory itself, but may not send events for all files in that directory. -// Sometimes it will send events for all times, sometimes it will send no -// events, and often only for some files. -// -// The default ReadDirectoryChangesW() buffer size is 64K, which is the largest -// value that is guaranteed to work with SMB filesystems. If you have many -// events in quick succession this may not be enough, and you will have to use -// [WithBufferSize] to increase the value. -type Watcher struct { - // Events sends the filesystem change events. - // - // fsnotify can send the following events; a "path" here can refer to a - // file, directory, symbolic link, or special file like a FIFO. - // - // fsnotify.Create A new path was created; this may be followed by one - // or more Write events if data also gets written to a - // file. - // - // fsnotify.Remove A path was removed. - // - // fsnotify.Rename A path was renamed. A rename is always sent with the - // old path as Event.Name, and a Create event will be - // sent with the new name. Renames are only sent for - // paths that are currently watched; e.g. moving an - // unmonitored file into a monitored directory will - // show up as just a Create. Similarly, renaming a file - // to outside a monitored directory will show up as - // only a Rename. - // - // fsnotify.Write A file or named pipe was written to. A Truncate will - // also trigger a Write. A single "write action" - // initiated by the user may show up as one or multiple - // writes, depending on when the system syncs things to - // disk. For example when compiling a large Go program - // you may get hundreds of Write events, and you may - // want to wait until you've stopped receiving them - // (see the dedup example in cmd/fsnotify). - // - // Some systems may send Write event for directories - // when the directory content changes. - // - // fsnotify.Chmod Attributes were changed. On Linux this is also sent - // when a file is removed (or more accurately, when a - // link to an inode is removed). On kqueue it's sent - // when a file is truncated. On Windows it's never - // sent. +type inotify struct { Events chan Event - - // Errors sends any errors. - // - // ErrEventOverflow is used to indicate there are too many events: - // - // - inotify: There are too many queued events (fs.inotify.max_queued_events sysctl) - // - windows: The buffer size is too small; WithBufferSize() can be used to increase it. - // - kqueue, fen: Not used. Errors chan error // Store fd here as os.File.Read() will no longer return on close after @@ -139,8 +28,26 @@ type Watcher struct { inotifyFile *os.File watches *watches done chan struct{} // Channel for sending a "quit message" to the reader goroutine - closeMu sync.Mutex + doneMu sync.Mutex doneResp chan struct{} // Channel to respond to Close + + // Store rename cookies in an array, with the index wrapping to 0. Almost + // all of the time what we get is a MOVED_FROM to set the cookie and the + // next event inotify sends will be MOVED_TO to read it. However, this is + // not guaranteed – as described in inotify(7) – and we may get other events + // between the two MOVED_* events (including other MOVED_* ones). + // + // A second issue is that moving a file outside the watched directory will + // trigger a MOVED_FROM to set the cookie, but we never see the MOVED_TO to + // read and delete it. So just storing it in a map would slowly leak memory. + // + // Doing it like this gives us a simple fast LRU-cache that won't allocate. + // Ten items should be more than enough for our purpose, and a loop over + // such a short array is faster than a map access anyway (not that it hugely + // matters since we're talking about hundreds of ns at the most, but still). + cookies [10]koekje + cookieIndex uint8 + cookiesMu sync.Mutex } type ( @@ -150,9 +57,14 @@ type ( path map[string]uint32 // pathname → wd } watch struct { - wd uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall) - flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags) - path string // Watch path. + wd uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall) + flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags) + path string // Watch path. + recurse bool // Recursion with ./...? + } + koekje struct { + cookie uint32 + path string } ) @@ -179,23 +91,45 @@ func (w *watches) add(ww *watch) { func (w *watches) remove(wd uint32) { w.mu.Lock() defer w.mu.Unlock() - delete(w.path, w.wd[wd].path) + watch := w.wd[wd] // Could have had Remove() called. See #616. + if watch == nil { + return + } + delete(w.path, watch.path) delete(w.wd, wd) } -func (w *watches) removePath(path string) (uint32, bool) { +func (w *watches) removePath(path string) ([]uint32, error) { w.mu.Lock() defer w.mu.Unlock() + path, recurse := recursivePath(path) wd, ok := w.path[path] if !ok { - return 0, false + return nil, fmt.Errorf("%w: %s", ErrNonExistentWatch, path) + } + + watch := w.wd[wd] + if recurse && !watch.recurse { + return nil, fmt.Errorf("can't use /... with non-recursive watch %q", path) } delete(w.path, path) delete(w.wd, wd) + if !watch.recurse { + return []uint32{wd}, nil + } - return wd, true + wds := make([]uint32, 0, 8) + wds = append(wds, wd) + for p, rwd := range w.path { + if filepath.HasPrefix(p, path) { + delete(w.path, p) + delete(w.wd, rwd) + wds = append(wds, rwd) + } + } + return wds, nil } func (w *watches) byPath(path string) *watch { @@ -236,20 +170,11 @@ func (w *watches) updatePath(path string, f func(*watch) (*watch, error)) error return nil } -// NewWatcher creates a new Watcher. -func NewWatcher() (*Watcher, error) { - return NewBufferedWatcher(0) +func newBackend(ev chan Event, errs chan error) (backend, error) { + return newBufferedBackend(0, ev, errs) } -// NewBufferedWatcher creates a new Watcher with a buffered Watcher.Events -// channel. -// -// The main use case for this is situations with a very large number of events -// where the kernel buffer size can't be increased (e.g. due to lack of -// permissions). An unbuffered Watcher will perform better for almost all use -// cases, and whenever possible you will be better off increasing the kernel -// buffers instead of adding a large userspace buffer. -func NewBufferedWatcher(sz uint) (*Watcher, error) { +func newBufferedBackend(sz uint, ev chan Event, errs chan error) (backend, error) { // Need to set nonblocking mode for SetDeadline to work, otherwise blocking // I/O operations won't terminate on close. fd, errno := unix.InotifyInit1(unix.IN_CLOEXEC | unix.IN_NONBLOCK) @@ -257,12 +182,12 @@ func NewBufferedWatcher(sz uint) (*Watcher, error) { return nil, errno } - w := &Watcher{ + w := &inotify{ + Events: ev, + Errors: errs, fd: fd, inotifyFile: os.NewFile(uintptr(fd), ""), watches: newWatches(), - Events: make(chan Event, sz), - Errors: make(chan error), done: make(chan struct{}), doneResp: make(chan struct{}), } @@ -272,26 +197,29 @@ func NewBufferedWatcher(sz uint) (*Watcher, error) { } // Returns true if the event was sent, or false if watcher is closed. -func (w *Watcher) sendEvent(e Event) bool { +func (w *inotify) sendEvent(e Event) bool { select { - case w.Events <- e: - return true case <-w.done: return false + case w.Events <- e: + return true } } // Returns true if the error was sent, or false if watcher is closed. -func (w *Watcher) sendError(err error) bool { - select { - case w.Errors <- err: +func (w *inotify) sendError(err error) bool { + if err == nil { return true + } + select { case <-w.done: return false + case w.Errors <- err: + return true } } -func (w *Watcher) isClosed() bool { +func (w *inotify) isClosed() bool { select { case <-w.done: return true @@ -300,15 +228,14 @@ func (w *Watcher) isClosed() bool { } } -// Close removes all watches and closes the Events channel. -func (w *Watcher) Close() error { - w.closeMu.Lock() +func (w *inotify) Close() error { + w.doneMu.Lock() if w.isClosed() { - w.closeMu.Unlock() + w.doneMu.Unlock() return nil } close(w.done) - w.closeMu.Unlock() + w.doneMu.Unlock() // Causes any blocking reads to return with an error, provided the file // still supports deadline operations. @@ -323,78 +250,104 @@ func (w *Watcher) Close() error { return nil } -// Add starts monitoring the path for changes. -// -// A path can only be watched once; watching it more than once is a no-op and will -// not return an error. Paths that do not yet exist on the filesystem cannot be -// watched. -// -// A watch will be automatically removed if the watched path is deleted or -// renamed. The exception is the Windows backend, which doesn't remove the -// watcher on renames. -// -// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special -// filesystems (/proc, /sys, etc.) generally don't work. -// -// Returns [ErrClosed] if [Watcher.Close] was called. -// -// See [Watcher.AddWith] for a version that allows adding options. -// -// # Watching directories -// -// All files in a directory are monitored, including new files that are created -// after the watcher is started. Subdirectories are not watched (i.e. it's -// non-recursive). -// -// # Watching files -// -// Watching individual files (rather than directories) is generally not -// recommended as many programs (especially editors) update files atomically: it -// will write to a temporary file which is then moved to to destination, -// overwriting the original (or some variant thereof). The watcher on the -// original file is now lost, as that no longer exists. -// -// The upshot of this is that a power failure or crash won't leave a -// half-written file. -// -// Watch the parent directory and use Event.Name to filter out files you're not -// interested in. There is an example of this in cmd/fsnotify/file.go. -func (w *Watcher) Add(name string) error { return w.AddWith(name) } - -// AddWith is like [Watcher.Add], but allows adding options. When using Add() -// the defaults described below are used. -// -// Possible options are: -// -// - [WithBufferSize] sets the buffer size for the Windows backend; no-op on -// other platforms. The default is 64K (65536 bytes). -func (w *Watcher) AddWith(name string, opts ...addOpt) error { +func (w *inotify) Add(name string) error { return w.AddWith(name) } + +func (w *inotify) AddWith(path string, opts ...addOpt) error { if w.isClosed() { return ErrClosed } + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s AddWith(%q)\n", + time.Now().Format("15:04:05.000000000"), path) + } + + with := getOptions(opts...) + if !w.xSupports(with.op) { + return fmt.Errorf("%w: %s", xErrUnsupported, with.op) + } - name = filepath.Clean(name) - _ = getOptions(opts...) + path, recurse := recursivePath(path) + if recurse { + return filepath.WalkDir(path, func(root string, d fs.DirEntry, err error) error { + if err != nil { + return err + } + if !d.IsDir() { + if root == path { + return fmt.Errorf("fsnotify: not a directory: %q", path) + } + return nil + } - var flags uint32 = unix.IN_MOVED_TO | unix.IN_MOVED_FROM | - unix.IN_CREATE | unix.IN_ATTRIB | unix.IN_MODIFY | - unix.IN_MOVE_SELF | unix.IN_DELETE | unix.IN_DELETE_SELF + // Send a Create event when adding new directory from a recursive + // watch; this is for "mkdir -p one/two/three". Usually all those + // directories will be created before we can set up watchers on the + // subdirectories, so only "one" would be sent as a Create event and + // not "one/two" and "one/two/three" (inotifywait -r has the same + // problem). + if with.sendCreate && root != path { + w.sendEvent(Event{Name: root, Op: Create}) + } + + return w.add(root, with, true) + }) + } - return w.watches.updatePath(name, func(existing *watch) (*watch, error) { + return w.add(path, with, false) +} + +func (w *inotify) add(path string, with withOpts, recurse bool) error { + var flags uint32 + if with.noFollow { + flags |= unix.IN_DONT_FOLLOW + } + if with.op.Has(Create) { + flags |= unix.IN_CREATE + } + if with.op.Has(Write) { + flags |= unix.IN_MODIFY + } + if with.op.Has(Remove) { + flags |= unix.IN_DELETE | unix.IN_DELETE_SELF + } + if with.op.Has(Rename) { + flags |= unix.IN_MOVED_TO | unix.IN_MOVED_FROM | unix.IN_MOVE_SELF + } + if with.op.Has(Chmod) { + flags |= unix.IN_ATTRIB + } + if with.op.Has(xUnportableOpen) { + flags |= unix.IN_OPEN + } + if with.op.Has(xUnportableRead) { + flags |= unix.IN_ACCESS + } + if with.op.Has(xUnportableCloseWrite) { + flags |= unix.IN_CLOSE_WRITE + } + if with.op.Has(xUnportableCloseRead) { + flags |= unix.IN_CLOSE_NOWRITE + } + return w.register(path, flags, recurse) +} + +func (w *inotify) register(path string, flags uint32, recurse bool) error { + return w.watches.updatePath(path, func(existing *watch) (*watch, error) { if existing != nil { flags |= existing.flags | unix.IN_MASK_ADD } - wd, err := unix.InotifyAddWatch(w.fd, name, flags) + wd, err := unix.InotifyAddWatch(w.fd, path, flags) if wd == -1 { return nil, err } if existing == nil { return &watch{ - wd: uint32(wd), - path: name, - flags: flags, + wd: uint32(wd), + path: path, + flags: flags, + recurse: recurse, }, nil } @@ -404,49 +357,44 @@ func (w *Watcher) AddWith(name string, opts ...addOpt) error { }) } -// Remove stops monitoring the path for changes. -// -// Directories are always removed non-recursively. For example, if you added -// /tmp/dir and /tmp/dir/subdir then you will need to remove both. -// -// Removing a path that has not yet been added returns [ErrNonExistentWatch]. -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) Remove(name string) error { +func (w *inotify) Remove(name string) error { if w.isClosed() { return nil } + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s Remove(%q)\n", + time.Now().Format("15:04:05.000000000"), name) + } return w.remove(filepath.Clean(name)) } -func (w *Watcher) remove(name string) error { - wd, ok := w.watches.removePath(name) - if !ok { - return fmt.Errorf("%w: %s", ErrNonExistentWatch, name) - } - - success, errno := unix.InotifyRmWatch(w.fd, wd) - if success == -1 { - // TODO: Perhaps it's not helpful to return an error here in every case; - // The only two possible errors are: - // - // - EBADF, which happens when w.fd is not a valid file descriptor - // of any kind. - // - EINVAL, which is when fd is not an inotify descriptor or wd - // is not a valid watch descriptor. Watch descriptors are - // invalidated when they are removed explicitly or implicitly; - // explicitly by inotify_rm_watch, implicitly when the file they - // are watching is deleted. - return errno +func (w *inotify) remove(name string) error { + wds, err := w.watches.removePath(name) + if err != nil { + return err + } + + for _, wd := range wds { + _, err := unix.InotifyRmWatch(w.fd, wd) + if err != nil { + // TODO: Perhaps it's not helpful to return an error here in every + // case; the only two possible errors are: + // + // EBADF, which happens when w.fd is not a valid file descriptor of + // any kind. + // + // EINVAL, which is when fd is not an inotify descriptor or wd is + // not a valid watch descriptor. Watch descriptors are invalidated + // when they are removed explicitly or implicitly; explicitly by + // inotify_rm_watch, implicitly when the file they are watching is + // deleted. + return err + } } return nil } -// WatchList returns all paths explicitly added with [Watcher.Add] (and are not -// yet removed). -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) WatchList() []string { +func (w *inotify) WatchList() []string { if w.isClosed() { return nil } @@ -463,7 +411,7 @@ func (w *Watcher) WatchList() []string { // readEvents reads from the inotify file descriptor, converts the // received events into Event objects and sends them via the Events channel -func (w *Watcher) readEvents() { +func (w *inotify) readEvents() { defer func() { close(w.doneResp) close(w.Errors) @@ -506,15 +454,17 @@ func (w *Watcher) readEvents() { continue } - var offset uint32 // We don't know how many events we just read into the buffer // While the offset points to at least one whole event... + var offset uint32 for offset <= uint32(n-unix.SizeofInotifyEvent) { var ( // Point "raw" to the event in the buffer raw = (*unix.InotifyEvent)(unsafe.Pointer(&buf[offset])) mask = uint32(raw.Mask) nameLen = uint32(raw.Len) + // Move to the next event in the buffer + next = func() { offset += unix.SizeofInotifyEvent + nameLen } ) if mask&unix.IN_Q_OVERFLOW != 0 { @@ -523,21 +473,53 @@ func (w *Watcher) readEvents() { } } - // If the event happened to the watched directory or the watched file, the kernel - // doesn't append the filename to the event, but we would like to always fill the - // the "Name" field with a valid filename. We retrieve the path of the watch from - // the "paths" map. + /// If the event happened to the watched directory or the watched + /// file, the kernel doesn't append the filename to the event, but + /// we would like to always fill the the "Name" field with a valid + /// filename. We retrieve the path of the watch from the "paths" + /// map. watch := w.watches.byWd(uint32(raw.Wd)) + /// Can be nil if Remove() was called in another goroutine for this + /// path inbetween reading the events from the kernel and reading + /// the internal state. Not much we can do about it, so just skip. + /// See #616. + if watch == nil { + next() + continue + } + + name := watch.path + if nameLen > 0 { + /// Point "bytes" at the first byte of the filename + bytes := (*[unix.PathMax]byte)(unsafe.Pointer(&buf[offset+unix.SizeofInotifyEvent]))[:nameLen:nameLen] + /// The filename is padded with NULL bytes. TrimRight() gets rid of those. + name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000") + } + + if debug { + internal.Debug(name, raw.Mask, raw.Cookie) + } + + if mask&unix.IN_IGNORED != 0 { //&& event.Op != 0 + next() + continue + } // inotify will automatically remove the watch on deletes; just need // to clean our state here. - if watch != nil && mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF { + if mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF { w.watches.remove(watch.wd) } + // We can't really update the state when a watched path is moved; // only IN_MOVE_SELF is sent and not IN_MOVED_{FROM,TO}. So remove // the watch. - if watch != nil && mask&unix.IN_MOVE_SELF == unix.IN_MOVE_SELF { + if mask&unix.IN_MOVE_SELF == unix.IN_MOVE_SELF { + if watch.recurse { + next() // Do nothing + continue + } + err := w.remove(watch.path) if err != nil && !errors.Is(err, ErrNonExistentWatch) { if !w.sendError(err) { @@ -546,34 +528,69 @@ func (w *Watcher) readEvents() { } } - var name string - if watch != nil { - name = watch.path - } - if nameLen > 0 { - // Point "bytes" at the first byte of the filename - bytes := (*[unix.PathMax]byte)(unsafe.Pointer(&buf[offset+unix.SizeofInotifyEvent]))[:nameLen:nameLen] - // The filename is padded with NULL bytes. TrimRight() gets rid of those. - name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000") + /// Skip if we're watching both this path and the parent; the parent + /// will already send a delete so no need to do it twice. + if mask&unix.IN_DELETE_SELF != 0 { + if _, ok := w.watches.path[filepath.Dir(watch.path)]; ok { + next() + continue + } } - event := w.newEvent(name, mask) + ev := w.newEvent(name, mask, raw.Cookie) + // Need to update watch path for recurse. + if watch.recurse { + isDir := mask&unix.IN_ISDIR == unix.IN_ISDIR + /// New directory created: set up watch on it. + if isDir && ev.Has(Create) { + err := w.register(ev.Name, watch.flags, true) + if !w.sendError(err) { + return + } - // Send the events that are not ignored on the events channel - if mask&unix.IN_IGNORED == 0 { - if !w.sendEvent(event) { - return + // This was a directory rename, so we need to update all + // the children. + // + // TODO: this is of course pretty slow; we should use a + // better data structure for storing all of this, e.g. store + // children in the watch. I have some code for this in my + // kqueue refactor we can use in the future. For now I'm + // okay with this as it's not publicly available. + // Correctness first, performance second. + if ev.renamedFrom != "" { + w.watches.mu.Lock() + for k, ww := range w.watches.wd { + if k == watch.wd || ww.path == ev.Name { + continue + } + if strings.HasPrefix(ww.path, ev.renamedFrom) { + ww.path = strings.Replace(ww.path, ev.renamedFrom, ev.Name, 1) + w.watches.wd[k] = ww + } + } + w.watches.mu.Unlock() + } } } - // Move to the next event in the buffer - offset += unix.SizeofInotifyEvent + nameLen + /// Send the events that are not ignored on the events channel + if !w.sendEvent(ev) { + return + } + next() } } } -// newEvent returns an platform-independent Event based on an inotify mask. -func (w *Watcher) newEvent(name string, mask uint32) Event { +func (w *inotify) isRecursive(path string) bool { + ww := w.watches.byPath(path) + if ww == nil { // path could be a file, so also check the Dir. + ww = w.watches.byPath(filepath.Dir(path)) + } + return ww != nil && ww.recurse +} + +func (w *inotify) newEvent(name string, mask, cookie uint32) Event { e := Event{Name: name} if mask&unix.IN_CREATE == unix.IN_CREATE || mask&unix.IN_MOVED_TO == unix.IN_MOVED_TO { e.Op |= Create @@ -584,11 +601,58 @@ func (w *Watcher) newEvent(name string, mask uint32) Event { if mask&unix.IN_MODIFY == unix.IN_MODIFY { e.Op |= Write } + if mask&unix.IN_OPEN == unix.IN_OPEN { + e.Op |= xUnportableOpen + } + if mask&unix.IN_ACCESS == unix.IN_ACCESS { + e.Op |= xUnportableRead + } + if mask&unix.IN_CLOSE_WRITE == unix.IN_CLOSE_WRITE { + e.Op |= xUnportableCloseWrite + } + if mask&unix.IN_CLOSE_NOWRITE == unix.IN_CLOSE_NOWRITE { + e.Op |= xUnportableCloseRead + } if mask&unix.IN_MOVE_SELF == unix.IN_MOVE_SELF || mask&unix.IN_MOVED_FROM == unix.IN_MOVED_FROM { e.Op |= Rename } if mask&unix.IN_ATTRIB == unix.IN_ATTRIB { e.Op |= Chmod } + + if cookie != 0 { + if mask&unix.IN_MOVED_FROM == unix.IN_MOVED_FROM { + w.cookiesMu.Lock() + w.cookies[w.cookieIndex] = koekje{cookie: cookie, path: e.Name} + w.cookieIndex++ + if w.cookieIndex > 9 { + w.cookieIndex = 0 + } + w.cookiesMu.Unlock() + } else if mask&unix.IN_MOVED_TO == unix.IN_MOVED_TO { + w.cookiesMu.Lock() + var prev string + for _, c := range w.cookies { + if c.cookie == cookie { + prev = c.path + break + } + } + w.cookiesMu.Unlock() + e.renamedFrom = prev + } + } return e } + +func (w *inotify) xSupports(op Op) bool { + return true // Supports everything. +} + +func (w *inotify) state() { + w.watches.mu.Lock() + defer w.watches.mu.Unlock() + for wd, ww := range w.watches.wd { + fmt.Fprintf(os.Stderr, "%4d: recurse=%t %q\n", wd, ww.recurse, ww.path) + } +} diff --git a/vendor/github.com/fsnotify/fsnotify/backend_kqueue.go b/vendor/github.com/fsnotify/fsnotify/backend_kqueue.go index 063a0915a..d8de5ab76 100644 --- a/vendor/github.com/fsnotify/fsnotify/backend_kqueue.go +++ b/vendor/github.com/fsnotify/fsnotify/backend_kqueue.go @@ -1,8 +1,4 @@ //go:build freebsd || openbsd || netbsd || dragonfly || darwin -// +build freebsd openbsd netbsd dragonfly darwin - -// Note: the documentation on the Watcher type and methods is generated from -// mkdoc.zsh package fsnotify @@ -11,174 +7,195 @@ import ( "fmt" "os" "path/filepath" + "runtime" "sync" + "time" + "github.com/fsnotify/fsnotify/internal" "golang.org/x/sys/unix" ) -// Watcher watches a set of paths, delivering events on a channel. -// -// A watcher should not be copied (e.g. pass it by pointer, rather than by -// value). -// -// # Linux notes -// -// When a file is removed a Remove event won't be emitted until all file -// descriptors are closed, and deletes will always emit a Chmod. For example: -// -// fp := os.Open("file") -// os.Remove("file") // Triggers Chmod -// fp.Close() // Triggers Remove -// -// This is the event that inotify sends, so not much can be changed about this. -// -// The fs.inotify.max_user_watches sysctl variable specifies the upper limit -// for the number of watches per user, and fs.inotify.max_user_instances -// specifies the maximum number of inotify instances per user. Every Watcher you -// create is an "instance", and every path you add is a "watch". -// -// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and -// /proc/sys/fs/inotify/max_user_instances -// -// To increase them you can use sysctl or write the value to the /proc file: -// -// # Default values on Linux 5.18 -// sysctl fs.inotify.max_user_watches=124983 -// sysctl fs.inotify.max_user_instances=128 -// -// To make the changes persist on reboot edit /etc/sysctl.conf or -// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check -// your distro's documentation): -// -// fs.inotify.max_user_watches=124983 -// fs.inotify.max_user_instances=128 -// -// Reaching the limit will result in a "no space left on device" or "too many open -// files" error. -// -// # kqueue notes (macOS, BSD) -// -// kqueue requires opening a file descriptor for every file that's being watched; -// so if you're watching a directory with five files then that's six file -// descriptors. You will run in to your system's "max open files" limit faster on -// these platforms. -// -// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to -// control the maximum number of open files, as well as /etc/login.conf on BSD -// systems. -// -// # Windows notes -// -// Paths can be added as "C:\path\to\dir", but forward slashes -// ("C:/path/to/dir") will also work. -// -// When a watched directory is removed it will always send an event for the -// directory itself, but may not send events for all files in that directory. -// Sometimes it will send events for all times, sometimes it will send no -// events, and often only for some files. -// -// The default ReadDirectoryChangesW() buffer size is 64K, which is the largest -// value that is guaranteed to work with SMB filesystems. If you have many -// events in quick succession this may not be enough, and you will have to use -// [WithBufferSize] to increase the value. -type Watcher struct { - // Events sends the filesystem change events. - // - // fsnotify can send the following events; a "path" here can refer to a - // file, directory, symbolic link, or special file like a FIFO. - // - // fsnotify.Create A new path was created; this may be followed by one - // or more Write events if data also gets written to a - // file. - // - // fsnotify.Remove A path was removed. - // - // fsnotify.Rename A path was renamed. A rename is always sent with the - // old path as Event.Name, and a Create event will be - // sent with the new name. Renames are only sent for - // paths that are currently watched; e.g. moving an - // unmonitored file into a monitored directory will - // show up as just a Create. Similarly, renaming a file - // to outside a monitored directory will show up as - // only a Rename. - // - // fsnotify.Write A file or named pipe was written to. A Truncate will - // also trigger a Write. A single "write action" - // initiated by the user may show up as one or multiple - // writes, depending on when the system syncs things to - // disk. For example when compiling a large Go program - // you may get hundreds of Write events, and you may - // want to wait until you've stopped receiving them - // (see the dedup example in cmd/fsnotify). - // - // Some systems may send Write event for directories - // when the directory content changes. - // - // fsnotify.Chmod Attributes were changed. On Linux this is also sent - // when a file is removed (or more accurately, when a - // link to an inode is removed). On kqueue it's sent - // when a file is truncated. On Windows it's never - // sent. +type kqueue struct { Events chan Event - - // Errors sends any errors. - // - // ErrEventOverflow is used to indicate there are too many events: - // - // - inotify: There are too many queued events (fs.inotify.max_queued_events sysctl) - // - windows: The buffer size is too small; WithBufferSize() can be used to increase it. - // - kqueue, fen: Not used. Errors chan error - done chan struct{} - kq int // File descriptor (as returned by the kqueue() syscall). - closepipe [2]int // Pipe used for closing. - mu sync.Mutex // Protects access to watcher data - watches map[string]int // Watched file descriptors (key: path). - watchesByDir map[string]map[int]struct{} // Watched file descriptors indexed by the parent directory (key: dirname(path)). - userWatches map[string]struct{} // Watches added with Watcher.Add() - dirFlags map[string]uint32 // Watched directories to fflags used in kqueue. - paths map[int]pathInfo // File descriptors to path names for processing kqueue events. - fileExists map[string]struct{} // Keep track of if we know this file exists (to stop duplicate create events). - isClosed bool // Set to true when Close() is first called + kq int // File descriptor (as returned by the kqueue() syscall). + closepipe [2]int // Pipe used for closing kq. + watches *watches + done chan struct{} + doneMu sync.Mutex } -type pathInfo struct { - name string - isDir bool +type ( + watches struct { + mu sync.RWMutex + wd map[int]watch // wd → watch + path map[string]int // pathname → wd + byDir map[string]map[int]struct{} // dirname(path) → wd + seen map[string]struct{} // Keep track of if we know this file exists. + byUser map[string]struct{} // Watches added with Watcher.Add() + } + watch struct { + wd int + name string + linkName string // In case of links; name is the target, and this is the link. + isDir bool + dirFlags uint32 + } +) + +func newWatches() *watches { + return &watches{ + wd: make(map[int]watch), + path: make(map[string]int), + byDir: make(map[string]map[int]struct{}), + seen: make(map[string]struct{}), + byUser: make(map[string]struct{}), + } } -// NewWatcher creates a new Watcher. -func NewWatcher() (*Watcher, error) { - return NewBufferedWatcher(0) +func (w *watches) listPaths(userOnly bool) []string { + w.mu.RLock() + defer w.mu.RUnlock() + + if userOnly { + l := make([]string, 0, len(w.byUser)) + for p := range w.byUser { + l = append(l, p) + } + return l + } + + l := make([]string, 0, len(w.path)) + for p := range w.path { + l = append(l, p) + } + return l } -// NewBufferedWatcher creates a new Watcher with a buffered Watcher.Events -// channel. -// -// The main use case for this is situations with a very large number of events -// where the kernel buffer size can't be increased (e.g. due to lack of -// permissions). An unbuffered Watcher will perform better for almost all use -// cases, and whenever possible you will be better off increasing the kernel -// buffers instead of adding a large userspace buffer. -func NewBufferedWatcher(sz uint) (*Watcher, error) { +func (w *watches) watchesInDir(path string) []string { + w.mu.RLock() + defer w.mu.RUnlock() + + l := make([]string, 0, 4) + for fd := range w.byDir[path] { + info := w.wd[fd] + if _, ok := w.byUser[info.name]; !ok { + l = append(l, info.name) + } + } + return l +} + +// Mark path as added by the user. +func (w *watches) addUserWatch(path string) { + w.mu.Lock() + defer w.mu.Unlock() + w.byUser[path] = struct{}{} +} + +func (w *watches) addLink(path string, fd int) { + w.mu.Lock() + defer w.mu.Unlock() + + w.path[path] = fd + w.seen[path] = struct{}{} +} + +func (w *watches) add(path, linkPath string, fd int, isDir bool) { + w.mu.Lock() + defer w.mu.Unlock() + + w.path[path] = fd + w.wd[fd] = watch{wd: fd, name: path, linkName: linkPath, isDir: isDir} + + parent := filepath.Dir(path) + byDir, ok := w.byDir[parent] + if !ok { + byDir = make(map[int]struct{}, 1) + w.byDir[parent] = byDir + } + byDir[fd] = struct{}{} +} + +func (w *watches) byWd(fd int) (watch, bool) { + w.mu.RLock() + defer w.mu.RUnlock() + info, ok := w.wd[fd] + return info, ok +} + +func (w *watches) byPath(path string) (watch, bool) { + w.mu.RLock() + defer w.mu.RUnlock() + info, ok := w.wd[w.path[path]] + return info, ok +} + +func (w *watches) updateDirFlags(path string, flags uint32) { + w.mu.Lock() + defer w.mu.Unlock() + + fd := w.path[path] + info := w.wd[fd] + info.dirFlags = flags + w.wd[fd] = info +} + +func (w *watches) remove(fd int, path string) bool { + w.mu.Lock() + defer w.mu.Unlock() + + isDir := w.wd[fd].isDir + delete(w.path, path) + delete(w.byUser, path) + + parent := filepath.Dir(path) + delete(w.byDir[parent], fd) + + if len(w.byDir[parent]) == 0 { + delete(w.byDir, parent) + } + + delete(w.wd, fd) + delete(w.seen, path) + return isDir +} + +func (w *watches) markSeen(path string, exists bool) { + w.mu.Lock() + defer w.mu.Unlock() + if exists { + w.seen[path] = struct{}{} + } else { + delete(w.seen, path) + } +} + +func (w *watches) seenBefore(path string) bool { + w.mu.RLock() + defer w.mu.RUnlock() + _, ok := w.seen[path] + return ok +} + +func newBackend(ev chan Event, errs chan error) (backend, error) { + return newBufferedBackend(0, ev, errs) +} + +func newBufferedBackend(sz uint, ev chan Event, errs chan error) (backend, error) { kq, closepipe, err := newKqueue() if err != nil { return nil, err } - w := &Watcher{ - kq: kq, - closepipe: closepipe, - watches: make(map[string]int), - watchesByDir: make(map[string]map[int]struct{}), - dirFlags: make(map[string]uint32), - paths: make(map[int]pathInfo), - fileExists: make(map[string]struct{}), - userWatches: make(map[string]struct{}), - Events: make(chan Event, sz), - Errors: make(chan error), - done: make(chan struct{}), + w := &kqueue{ + Events: ev, + Errors: errs, + kq: kq, + closepipe: closepipe, + done: make(chan struct{}), + watches: newWatches(), } go w.readEvents() @@ -203,6 +220,8 @@ func newKqueue() (kq int, closepipe [2]int, err error) { unix.Close(kq) return kq, closepipe, err } + unix.CloseOnExec(closepipe[0]) + unix.CloseOnExec(closepipe[1]) // Register changes to listen on the closepipe. changes := make([]unix.Kevent_t, 1) @@ -221,166 +240,108 @@ func newKqueue() (kq int, closepipe [2]int, err error) { } // Returns true if the event was sent, or false if watcher is closed. -func (w *Watcher) sendEvent(e Event) bool { +func (w *kqueue) sendEvent(e Event) bool { select { - case w.Events <- e: - return true case <-w.done: return false + case w.Events <- e: + return true } } // Returns true if the error was sent, or false if watcher is closed. -func (w *Watcher) sendError(err error) bool { +func (w *kqueue) sendError(err error) bool { + if err == nil { + return true + } select { + case <-w.done: + return false case w.Errors <- err: return true + } +} + +func (w *kqueue) isClosed() bool { + select { case <-w.done: + return true + default: return false } } -// Close removes all watches and closes the Events channel. -func (w *Watcher) Close() error { - w.mu.Lock() - if w.isClosed { - w.mu.Unlock() +func (w *kqueue) Close() error { + w.doneMu.Lock() + if w.isClosed() { + w.doneMu.Unlock() return nil } - w.isClosed = true + close(w.done) + w.doneMu.Unlock() - // copy paths to remove while locked - pathsToRemove := make([]string, 0, len(w.watches)) - for name := range w.watches { - pathsToRemove = append(pathsToRemove, name) - } - w.mu.Unlock() // Unlock before calling Remove, which also locks + pathsToRemove := w.watches.listPaths(false) for _, name := range pathsToRemove { w.Remove(name) } // Send "quit" message to the reader goroutine. unix.Close(w.closepipe[1]) - close(w.done) - return nil } -// Add starts monitoring the path for changes. -// -// A path can only be watched once; watching it more than once is a no-op and will -// not return an error. Paths that do not yet exist on the filesystem cannot be -// watched. -// -// A watch will be automatically removed if the watched path is deleted or -// renamed. The exception is the Windows backend, which doesn't remove the -// watcher on renames. -// -// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special -// filesystems (/proc, /sys, etc.) generally don't work. -// -// Returns [ErrClosed] if [Watcher.Close] was called. -// -// See [Watcher.AddWith] for a version that allows adding options. -// -// # Watching directories -// -// All files in a directory are monitored, including new files that are created -// after the watcher is started. Subdirectories are not watched (i.e. it's -// non-recursive). -// -// # Watching files -// -// Watching individual files (rather than directories) is generally not -// recommended as many programs (especially editors) update files atomically: it -// will write to a temporary file which is then moved to to destination, -// overwriting the original (or some variant thereof). The watcher on the -// original file is now lost, as that no longer exists. -// -// The upshot of this is that a power failure or crash won't leave a -// half-written file. -// -// Watch the parent directory and use Event.Name to filter out files you're not -// interested in. There is an example of this in cmd/fsnotify/file.go. -func (w *Watcher) Add(name string) error { return w.AddWith(name) } +func (w *kqueue) Add(name string) error { return w.AddWith(name) } -// AddWith is like [Watcher.Add], but allows adding options. When using Add() -// the defaults described below are used. -// -// Possible options are: -// -// - [WithBufferSize] sets the buffer size for the Windows backend; no-op on -// other platforms. The default is 64K (65536 bytes). -func (w *Watcher) AddWith(name string, opts ...addOpt) error { - _ = getOptions(opts...) +func (w *kqueue) AddWith(name string, opts ...addOpt) error { + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s AddWith(%q)\n", + time.Now().Format("15:04:05.000000000"), name) + } + + with := getOptions(opts...) + if !w.xSupports(with.op) { + return fmt.Errorf("%w: %s", xErrUnsupported, with.op) + } - w.mu.Lock() - w.userWatches[name] = struct{}{} - w.mu.Unlock() _, err := w.addWatch(name, noteAllEvents) - return err + if err != nil { + return err + } + w.watches.addUserWatch(name) + return nil } -// Remove stops monitoring the path for changes. -// -// Directories are always removed non-recursively. For example, if you added -// /tmp/dir and /tmp/dir/subdir then you will need to remove both. -// -// Removing a path that has not yet been added returns [ErrNonExistentWatch]. -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) Remove(name string) error { +func (w *kqueue) Remove(name string) error { + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s Remove(%q)\n", + time.Now().Format("15:04:05.000000000"), name) + } return w.remove(name, true) } -func (w *Watcher) remove(name string, unwatchFiles bool) error { - name = filepath.Clean(name) - w.mu.Lock() - if w.isClosed { - w.mu.Unlock() +func (w *kqueue) remove(name string, unwatchFiles bool) error { + if w.isClosed() { return nil } - watchfd, ok := w.watches[name] - w.mu.Unlock() + + name = filepath.Clean(name) + info, ok := w.watches.byPath(name) if !ok { return fmt.Errorf("%w: %s", ErrNonExistentWatch, name) } - err := w.register([]int{watchfd}, unix.EV_DELETE, 0) + err := w.register([]int{info.wd}, unix.EV_DELETE, 0) if err != nil { return err } - unix.Close(watchfd) - - w.mu.Lock() - isDir := w.paths[watchfd].isDir - delete(w.watches, name) - delete(w.userWatches, name) - - parentName := filepath.Dir(name) - delete(w.watchesByDir[parentName], watchfd) - - if len(w.watchesByDir[parentName]) == 0 { - delete(w.watchesByDir, parentName) - } + unix.Close(info.wd) - delete(w.paths, watchfd) - delete(w.dirFlags, name) - delete(w.fileExists, name) - w.mu.Unlock() + isDir := w.watches.remove(info.wd, name) // Find all watched paths that are in this directory that are not external. if unwatchFiles && isDir { - var pathsToRemove []string - w.mu.Lock() - for fd := range w.watchesByDir[name] { - path := w.paths[fd] - if _, ok := w.userWatches[path.name]; !ok { - pathsToRemove = append(pathsToRemove, path.name) - } - } - w.mu.Unlock() + pathsToRemove := w.watches.watchesInDir(name) for _, name := range pathsToRemove { // Since these are internal, not much sense in propagating error to // the user, as that will just confuse them with an error about a @@ -391,23 +352,11 @@ func (w *Watcher) remove(name string, unwatchFiles bool) error { return nil } -// WatchList returns all paths explicitly added with [Watcher.Add] (and are not -// yet removed). -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) WatchList() []string { - w.mu.Lock() - defer w.mu.Unlock() - if w.isClosed { +func (w *kqueue) WatchList() []string { + if w.isClosed() { return nil } - - entries := make([]string, 0, len(w.userWatches)) - for pathname := range w.userWatches { - entries = append(entries, pathname) - } - - return entries + return w.watches.listPaths(true) } // Watch all events (except NOTE_EXTEND, NOTE_LINK, NOTE_REVOKE) @@ -417,34 +366,26 @@ const noteAllEvents = unix.NOTE_DELETE | unix.NOTE_WRITE | unix.NOTE_ATTRIB | un // described in kevent(2). // // Returns the real path to the file which was added, with symlinks resolved. -func (w *Watcher) addWatch(name string, flags uint32) (string, error) { - var isDir bool - name = filepath.Clean(name) - - w.mu.Lock() - if w.isClosed { - w.mu.Unlock() +func (w *kqueue) addWatch(name string, flags uint32) (string, error) { + if w.isClosed() { return "", ErrClosed } - watchfd, alreadyWatching := w.watches[name] - // We already have a watch, but we can still override flags. - if alreadyWatching { - isDir = w.paths[watchfd].isDir - } - w.mu.Unlock() + name = filepath.Clean(name) + + info, alreadyWatching := w.watches.byPath(name) if !alreadyWatching { fi, err := os.Lstat(name) if err != nil { return "", err } - // Don't watch sockets or named pipes + // Don't watch sockets or named pipes. if (fi.Mode()&os.ModeSocket == os.ModeSocket) || (fi.Mode()&os.ModeNamedPipe == os.ModeNamedPipe) { return "", nil } - // Follow Symlinks. + // Follow symlinks. if fi.Mode()&os.ModeSymlink == os.ModeSymlink { link, err := os.Readlink(name) if err != nil { @@ -455,18 +396,15 @@ func (w *Watcher) addWatch(name string, flags uint32) (string, error) { return "", nil } - w.mu.Lock() - _, alreadyWatching = w.watches[link] - w.mu.Unlock() - + _, alreadyWatching = w.watches.byPath(link) if alreadyWatching { // Add to watches so we don't get spurious Create events later // on when we diff the directories. - w.watches[name] = 0 - w.fileExists[name] = struct{}{} + w.watches.addLink(name, 0) return link, nil } + info.linkName = name name = link fi, err = os.Lstat(name) if err != nil { @@ -477,7 +415,7 @@ func (w *Watcher) addWatch(name string, flags uint32) (string, error) { // Retry on EINTR; open() can return EINTR in practice on macOS. // See #354, and Go issues 11180 and 39237. for { - watchfd, err = unix.Open(name, openMode, 0) + info.wd, err = unix.Open(name, openMode, 0) if err == nil { break } @@ -488,40 +426,25 @@ func (w *Watcher) addWatch(name string, flags uint32) (string, error) { return "", err } - isDir = fi.IsDir() + info.isDir = fi.IsDir() } - err := w.register([]int{watchfd}, unix.EV_ADD|unix.EV_CLEAR|unix.EV_ENABLE, flags) + err := w.register([]int{info.wd}, unix.EV_ADD|unix.EV_CLEAR|unix.EV_ENABLE, flags) if err != nil { - unix.Close(watchfd) + unix.Close(info.wd) return "", err } if !alreadyWatching { - w.mu.Lock() - parentName := filepath.Dir(name) - w.watches[name] = watchfd - - watchesByDir, ok := w.watchesByDir[parentName] - if !ok { - watchesByDir = make(map[int]struct{}, 1) - w.watchesByDir[parentName] = watchesByDir - } - watchesByDir[watchfd] = struct{}{} - w.paths[watchfd] = pathInfo{name: name, isDir: isDir} - w.mu.Unlock() + w.watches.add(name, info.linkName, info.wd, info.isDir) } - if isDir { - // Watch the directory if it has not been watched before, or if it was - // watched before, but perhaps only a NOTE_DELETE (watchDirectoryFiles) - w.mu.Lock() - + // Watch the directory if it has not been watched before, or if it was + // watched before, but perhaps only a NOTE_DELETE (watchDirectoryFiles) + if info.isDir { watchDir := (flags&unix.NOTE_WRITE) == unix.NOTE_WRITE && - (!alreadyWatching || (w.dirFlags[name]&unix.NOTE_WRITE) != unix.NOTE_WRITE) - // Store flags so this watch can be updated later - w.dirFlags[name] = flags - w.mu.Unlock() + (!alreadyWatching || (info.dirFlags&unix.NOTE_WRITE) != unix.NOTE_WRITE) + w.watches.updateDirFlags(name, flags) if watchDir { if err := w.watchDirectoryFiles(name); err != nil { @@ -534,7 +457,7 @@ func (w *Watcher) addWatch(name string, flags uint32) (string, error) { // readEvents reads from kqueue and converts the received kevents into // Event values that it sends down the Events channel. -func (w *Watcher) readEvents() { +func (w *kqueue) readEvents() { defer func() { close(w.Events) close(w.Errors) @@ -543,50 +466,65 @@ func (w *Watcher) readEvents() { }() eventBuffer := make([]unix.Kevent_t, 10) - for closed := false; !closed; { + for { kevents, err := w.read(eventBuffer) // EINTR is okay, the syscall was interrupted before timeout expired. if err != nil && err != unix.EINTR { if !w.sendError(fmt.Errorf("fsnotify.readEvents: %w", err)) { - closed = true + return } - continue } - // Flush the events we received to the Events channel for _, kevent := range kevents { var ( - watchfd = int(kevent.Ident) - mask = uint32(kevent.Fflags) + wd = int(kevent.Ident) + mask = uint32(kevent.Fflags) ) // Shut down the loop when the pipe is closed, but only after all // other events have been processed. - if watchfd == w.closepipe[0] { - closed = true - continue + if wd == w.closepipe[0] { + return } - w.mu.Lock() - path := w.paths[watchfd] - w.mu.Unlock() + path, ok := w.watches.byWd(wd) + if debug { + internal.Debug(path.name, &kevent) + } - event := w.newEvent(path.name, mask) + // On macOS it seems that sometimes an event with Ident=0 is + // delivered, and no other flags/information beyond that, even + // though we never saw such a file descriptor. For example in + // TestWatchSymlink/277 (usually at the end, but sometimes sooner): + // + // fmt.Printf("READ: %2d %#v\n", kevent.Ident, kevent) + // unix.Kevent_t{Ident:0x2a, Filter:-4, Flags:0x25, Fflags:0x2, Data:0, Udata:(*uint8)(nil)} + // unix.Kevent_t{Ident:0x0, Filter:-4, Flags:0x25, Fflags:0x2, Data:0, Udata:(*uint8)(nil)} + // + // The first is a normal event, the second with Ident 0. No error + // flag, no data, no ... nothing. + // + // I read a bit through bsd/kern_event.c from the xnu source, but I + // don't really see an obvious location where this is triggered – + // this doesn't seem intentional, but idk... + // + // Technically fd 0 is a valid descriptor, so only skip it if + // there's no path, and if we're on macOS. + if !ok && kevent.Ident == 0 && runtime.GOOS == "darwin" { + continue + } + + event := w.newEvent(path.name, path.linkName, mask) if event.Has(Rename) || event.Has(Remove) { w.remove(event.Name, false) - w.mu.Lock() - delete(w.fileExists, event.Name) - w.mu.Unlock() + w.watches.markSeen(event.Name, false) } if path.isDir && event.Has(Write) && !event.Has(Remove) { - w.sendDirectoryChangeEvents(event.Name) - } else { - if !w.sendEvent(event) { - closed = true - continue - } + w.dirChange(event.Name) + } else if !w.sendEvent(event) { + return } if event.Has(Remove) { @@ -594,25 +532,34 @@ func (w *Watcher) readEvents() { // mv f1 f2 will delete f2, then create f2. if path.isDir { fileDir := filepath.Clean(event.Name) - w.mu.Lock() - _, found := w.watches[fileDir] - w.mu.Unlock() + _, found := w.watches.byPath(fileDir) if found { - err := w.sendDirectoryChangeEvents(fileDir) - if err != nil { - if !w.sendError(err) { - closed = true - } + // TODO: this branch is never triggered in any test. + // Added in d6220df (2012). + // isDir check added in 8611c35 (2016): https://github.com/fsnotify/fsnotify/pull/111 + // + // I don't really get how this can be triggered either. + // And it wasn't triggered in the patch that added it, + // either. + // + // Original also had a comment: + // make sure the directory exists before we watch for + // changes. When we do a recursive watch and perform + // rm -rf, the parent directory might have gone + // missing, ignore the missing directory and let the + // upcoming delete event remove the watch from the + // parent directory. + err := w.dirChange(fileDir) + if !w.sendError(err) { + return } } } else { - filePath := filepath.Clean(event.Name) - if fi, err := os.Lstat(filePath); err == nil { - err := w.sendFileCreatedEventIfNew(filePath, fi) - if err != nil { - if !w.sendError(err) { - closed = true - } + path := filepath.Clean(event.Name) + if fi, err := os.Lstat(path); err == nil { + err := w.sendCreateIfNew(path, fi) + if !w.sendError(err) { + return } } } @@ -622,8 +569,14 @@ func (w *Watcher) readEvents() { } // newEvent returns an platform-independent Event based on kqueue Fflags. -func (w *Watcher) newEvent(name string, mask uint32) Event { +func (w *kqueue) newEvent(name, linkName string, mask uint32) Event { e := Event{Name: name} + if linkName != "" { + // If the user watched "/path/link" then emit events as "/path/link" + // rather than "/path/target". + e.Name = linkName + } + if mask&unix.NOTE_DELETE == unix.NOTE_DELETE { e.Op |= Remove } @@ -645,8 +598,7 @@ func (w *Watcher) newEvent(name string, mask uint32) Event { } // watchDirectoryFiles to mimic inotify when adding a watch on a directory -func (w *Watcher) watchDirectoryFiles(dirPath string) error { - // Get all files +func (w *kqueue) watchDirectoryFiles(dirPath string) error { files, err := os.ReadDir(dirPath) if err != nil { return err @@ -674,9 +626,7 @@ func (w *Watcher) watchDirectoryFiles(dirPath string) error { } } - w.mu.Lock() - w.fileExists[cleanPath] = struct{}{} - w.mu.Unlock() + w.watches.markSeen(cleanPath, true) } return nil @@ -686,7 +636,7 @@ func (w *Watcher) watchDirectoryFiles(dirPath string) error { // // This functionality is to have the BSD watcher match the inotify, which sends // a create event for files created in a watched directory. -func (w *Watcher) sendDirectoryChangeEvents(dir string) error { +func (w *kqueue) dirChange(dir string) error { files, err := os.ReadDir(dir) if err != nil { // Directory no longer exists: we can ignore this safely. kqueue will @@ -694,61 +644,51 @@ func (w *Watcher) sendDirectoryChangeEvents(dir string) error { if errors.Is(err, os.ErrNotExist) { return nil } - return fmt.Errorf("fsnotify.sendDirectoryChangeEvents: %w", err) + return fmt.Errorf("fsnotify.dirChange: %w", err) } for _, f := range files { fi, err := f.Info() if err != nil { - return fmt.Errorf("fsnotify.sendDirectoryChangeEvents: %w", err) + return fmt.Errorf("fsnotify.dirChange: %w", err) } - err = w.sendFileCreatedEventIfNew(filepath.Join(dir, fi.Name()), fi) + err = w.sendCreateIfNew(filepath.Join(dir, fi.Name()), fi) if err != nil { // Don't need to send an error if this file isn't readable. if errors.Is(err, unix.EACCES) || errors.Is(err, unix.EPERM) { return nil } - return fmt.Errorf("fsnotify.sendDirectoryChangeEvents: %w", err) + return fmt.Errorf("fsnotify.dirChange: %w", err) } } return nil } -// sendFileCreatedEvent sends a create event if the file isn't already being tracked. -func (w *Watcher) sendFileCreatedEventIfNew(filePath string, fi os.FileInfo) (err error) { - w.mu.Lock() - _, doesExist := w.fileExists[filePath] - w.mu.Unlock() - if !doesExist { - if !w.sendEvent(Event{Name: filePath, Op: Create}) { - return +// Send a create event if the file isn't already being tracked, and start +// watching this file. +func (w *kqueue) sendCreateIfNew(path string, fi os.FileInfo) error { + if !w.watches.seenBefore(path) { + if !w.sendEvent(Event{Name: path, Op: Create}) { + return nil } } - // like watchDirectoryFiles (but without doing another ReadDir) - filePath, err = w.internalWatch(filePath, fi) + // Like watchDirectoryFiles, but without doing another ReadDir. + path, err := w.internalWatch(path, fi) if err != nil { return err } - - w.mu.Lock() - w.fileExists[filePath] = struct{}{} - w.mu.Unlock() - + w.watches.markSeen(path, true) return nil } -func (w *Watcher) internalWatch(name string, fi os.FileInfo) (string, error) { +func (w *kqueue) internalWatch(name string, fi os.FileInfo) (string, error) { if fi.IsDir() { // mimic Linux providing delete events for subdirectories, but preserve // the flags used if currently watching subdirectory - w.mu.Lock() - flags := w.dirFlags[name] - w.mu.Unlock() - - flags |= unix.NOTE_DELETE | unix.NOTE_RENAME - return w.addWatch(name, flags) + info, _ := w.watches.byPath(name) + return w.addWatch(name, info.dirFlags|unix.NOTE_DELETE|unix.NOTE_RENAME) } // watch file to mimic Linux inotify @@ -756,7 +696,7 @@ func (w *Watcher) internalWatch(name string, fi os.FileInfo) (string, error) { } // Register events with the queue. -func (w *Watcher) register(fds []int, flags int, fflags uint32) error { +func (w *kqueue) register(fds []int, flags int, fflags uint32) error { changes := make([]unix.Kevent_t, len(fds)) for i, fd := range fds { // SetKevent converts int to the platform-specific types. @@ -773,10 +713,21 @@ func (w *Watcher) register(fds []int, flags int, fflags uint32) error { } // read retrieves pending events, or waits until an event occurs. -func (w *Watcher) read(events []unix.Kevent_t) ([]unix.Kevent_t, error) { +func (w *kqueue) read(events []unix.Kevent_t) ([]unix.Kevent_t, error) { n, err := unix.Kevent(w.kq, nil, events, nil) if err != nil { return nil, err } return events[0:n], nil } + +func (w *kqueue) xSupports(op Op) bool { + if runtime.GOOS == "freebsd" { + //return true // Supports everything. + } + if op.Has(xUnportableOpen) || op.Has(xUnportableRead) || + op.Has(xUnportableCloseWrite) || op.Has(xUnportableCloseRead) { + return false + } + return true +} diff --git a/vendor/github.com/fsnotify/fsnotify/backend_other.go b/vendor/github.com/fsnotify/fsnotify/backend_other.go index d34a23c01..5eb5dbc66 100644 --- a/vendor/github.com/fsnotify/fsnotify/backend_other.go +++ b/vendor/github.com/fsnotify/fsnotify/backend_other.go @@ -1,205 +1,23 @@ //go:build appengine || (!darwin && !dragonfly && !freebsd && !openbsd && !linux && !netbsd && !solaris && !windows) -// +build appengine !darwin,!dragonfly,!freebsd,!openbsd,!linux,!netbsd,!solaris,!windows - -// Note: the documentation on the Watcher type and methods is generated from -// mkdoc.zsh package fsnotify import "errors" -// Watcher watches a set of paths, delivering events on a channel. -// -// A watcher should not be copied (e.g. pass it by pointer, rather than by -// value). -// -// # Linux notes -// -// When a file is removed a Remove event won't be emitted until all file -// descriptors are closed, and deletes will always emit a Chmod. For example: -// -// fp := os.Open("file") -// os.Remove("file") // Triggers Chmod -// fp.Close() // Triggers Remove -// -// This is the event that inotify sends, so not much can be changed about this. -// -// The fs.inotify.max_user_watches sysctl variable specifies the upper limit -// for the number of watches per user, and fs.inotify.max_user_instances -// specifies the maximum number of inotify instances per user. Every Watcher you -// create is an "instance", and every path you add is a "watch". -// -// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and -// /proc/sys/fs/inotify/max_user_instances -// -// To increase them you can use sysctl or write the value to the /proc file: -// -// # Default values on Linux 5.18 -// sysctl fs.inotify.max_user_watches=124983 -// sysctl fs.inotify.max_user_instances=128 -// -// To make the changes persist on reboot edit /etc/sysctl.conf or -// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check -// your distro's documentation): -// -// fs.inotify.max_user_watches=124983 -// fs.inotify.max_user_instances=128 -// -// Reaching the limit will result in a "no space left on device" or "too many open -// files" error. -// -// # kqueue notes (macOS, BSD) -// -// kqueue requires opening a file descriptor for every file that's being watched; -// so if you're watching a directory with five files then that's six file -// descriptors. You will run in to your system's "max open files" limit faster on -// these platforms. -// -// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to -// control the maximum number of open files, as well as /etc/login.conf on BSD -// systems. -// -// # Windows notes -// -// Paths can be added as "C:\path\to\dir", but forward slashes -// ("C:/path/to/dir") will also work. -// -// When a watched directory is removed it will always send an event for the -// directory itself, but may not send events for all files in that directory. -// Sometimes it will send events for all times, sometimes it will send no -// events, and often only for some files. -// -// The default ReadDirectoryChangesW() buffer size is 64K, which is the largest -// value that is guaranteed to work with SMB filesystems. If you have many -// events in quick succession this may not be enough, and you will have to use -// [WithBufferSize] to increase the value. -type Watcher struct { - // Events sends the filesystem change events. - // - // fsnotify can send the following events; a "path" here can refer to a - // file, directory, symbolic link, or special file like a FIFO. - // - // fsnotify.Create A new path was created; this may be followed by one - // or more Write events if data also gets written to a - // file. - // - // fsnotify.Remove A path was removed. - // - // fsnotify.Rename A path was renamed. A rename is always sent with the - // old path as Event.Name, and a Create event will be - // sent with the new name. Renames are only sent for - // paths that are currently watched; e.g. moving an - // unmonitored file into a monitored directory will - // show up as just a Create. Similarly, renaming a file - // to outside a monitored directory will show up as - // only a Rename. - // - // fsnotify.Write A file or named pipe was written to. A Truncate will - // also trigger a Write. A single "write action" - // initiated by the user may show up as one or multiple - // writes, depending on when the system syncs things to - // disk. For example when compiling a large Go program - // you may get hundreds of Write events, and you may - // want to wait until you've stopped receiving them - // (see the dedup example in cmd/fsnotify). - // - // Some systems may send Write event for directories - // when the directory content changes. - // - // fsnotify.Chmod Attributes were changed. On Linux this is also sent - // when a file is removed (or more accurately, when a - // link to an inode is removed). On kqueue it's sent - // when a file is truncated. On Windows it's never - // sent. +type other struct { Events chan Event - - // Errors sends any errors. - // - // ErrEventOverflow is used to indicate there are too many events: - // - // - inotify: There are too many queued events (fs.inotify.max_queued_events sysctl) - // - windows: The buffer size is too small; WithBufferSize() can be used to increase it. - // - kqueue, fen: Not used. Errors chan error } -// NewWatcher creates a new Watcher. -func NewWatcher() (*Watcher, error) { +func newBackend(ev chan Event, errs chan error) (backend, error) { return nil, errors.New("fsnotify not supported on the current platform") } - -// NewBufferedWatcher creates a new Watcher with a buffered Watcher.Events -// channel. -// -// The main use case for this is situations with a very large number of events -// where the kernel buffer size can't be increased (e.g. due to lack of -// permissions). An unbuffered Watcher will perform better for almost all use -// cases, and whenever possible you will be better off increasing the kernel -// buffers instead of adding a large userspace buffer. -func NewBufferedWatcher(sz uint) (*Watcher, error) { return NewWatcher() } - -// Close removes all watches and closes the Events channel. -func (w *Watcher) Close() error { return nil } - -// WatchList returns all paths explicitly added with [Watcher.Add] (and are not -// yet removed). -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) WatchList() []string { return nil } - -// Add starts monitoring the path for changes. -// -// A path can only be watched once; watching it more than once is a no-op and will -// not return an error. Paths that do not yet exist on the filesystem cannot be -// watched. -// -// A watch will be automatically removed if the watched path is deleted or -// renamed. The exception is the Windows backend, which doesn't remove the -// watcher on renames. -// -// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special -// filesystems (/proc, /sys, etc.) generally don't work. -// -// Returns [ErrClosed] if [Watcher.Close] was called. -// -// See [Watcher.AddWith] for a version that allows adding options. -// -// # Watching directories -// -// All files in a directory are monitored, including new files that are created -// after the watcher is started. Subdirectories are not watched (i.e. it's -// non-recursive). -// -// # Watching files -// -// Watching individual files (rather than directories) is generally not -// recommended as many programs (especially editors) update files atomically: it -// will write to a temporary file which is then moved to to destination, -// overwriting the original (or some variant thereof). The watcher on the -// original file is now lost, as that no longer exists. -// -// The upshot of this is that a power failure or crash won't leave a -// half-written file. -// -// Watch the parent directory and use Event.Name to filter out files you're not -// interested in. There is an example of this in cmd/fsnotify/file.go. -func (w *Watcher) Add(name string) error { return nil } - -// AddWith is like [Watcher.Add], but allows adding options. When using Add() -// the defaults described below are used. -// -// Possible options are: -// -// - [WithBufferSize] sets the buffer size for the Windows backend; no-op on -// other platforms. The default is 64K (65536 bytes). -func (w *Watcher) AddWith(name string, opts ...addOpt) error { return nil } - -// Remove stops monitoring the path for changes. -// -// Directories are always removed non-recursively. For example, if you added -// /tmp/dir and /tmp/dir/subdir then you will need to remove both. -// -// Removing a path that has not yet been added returns [ErrNonExistentWatch]. -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) Remove(name string) error { return nil } +func newBufferedBackend(sz uint, ev chan Event, errs chan error) (backend, error) { + return newBackend(ev, errs) +} +func (w *other) Close() error { return nil } +func (w *other) WatchList() []string { return nil } +func (w *other) Add(name string) error { return nil } +func (w *other) AddWith(name string, opts ...addOpt) error { return nil } +func (w *other) Remove(name string) error { return nil } +func (w *other) xSupports(op Op) bool { return false } diff --git a/vendor/github.com/fsnotify/fsnotify/backend_windows.go b/vendor/github.com/fsnotify/fsnotify/backend_windows.go index 9bc91e5d6..c54a63083 100644 --- a/vendor/github.com/fsnotify/fsnotify/backend_windows.go +++ b/vendor/github.com/fsnotify/fsnotify/backend_windows.go @@ -1,12 +1,8 @@ //go:build windows -// +build windows // Windows backend based on ReadDirectoryChangesW() // // https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-readdirectorychangesw -// -// Note: the documentation on the Watcher type and methods is generated from -// mkdoc.zsh package fsnotify @@ -19,123 +15,15 @@ import ( "runtime" "strings" "sync" + "time" "unsafe" + "github.com/fsnotify/fsnotify/internal" "golang.org/x/sys/windows" ) -// Watcher watches a set of paths, delivering events on a channel. -// -// A watcher should not be copied (e.g. pass it by pointer, rather than by -// value). -// -// # Linux notes -// -// When a file is removed a Remove event won't be emitted until all file -// descriptors are closed, and deletes will always emit a Chmod. For example: -// -// fp := os.Open("file") -// os.Remove("file") // Triggers Chmod -// fp.Close() // Triggers Remove -// -// This is the event that inotify sends, so not much can be changed about this. -// -// The fs.inotify.max_user_watches sysctl variable specifies the upper limit -// for the number of watches per user, and fs.inotify.max_user_instances -// specifies the maximum number of inotify instances per user. Every Watcher you -// create is an "instance", and every path you add is a "watch". -// -// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and -// /proc/sys/fs/inotify/max_user_instances -// -// To increase them you can use sysctl or write the value to the /proc file: -// -// # Default values on Linux 5.18 -// sysctl fs.inotify.max_user_watches=124983 -// sysctl fs.inotify.max_user_instances=128 -// -// To make the changes persist on reboot edit /etc/sysctl.conf or -// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check -// your distro's documentation): -// -// fs.inotify.max_user_watches=124983 -// fs.inotify.max_user_instances=128 -// -// Reaching the limit will result in a "no space left on device" or "too many open -// files" error. -// -// # kqueue notes (macOS, BSD) -// -// kqueue requires opening a file descriptor for every file that's being watched; -// so if you're watching a directory with five files then that's six file -// descriptors. You will run in to your system's "max open files" limit faster on -// these platforms. -// -// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to -// control the maximum number of open files, as well as /etc/login.conf on BSD -// systems. -// -// # Windows notes -// -// Paths can be added as "C:\path\to\dir", but forward slashes -// ("C:/path/to/dir") will also work. -// -// When a watched directory is removed it will always send an event for the -// directory itself, but may not send events for all files in that directory. -// Sometimes it will send events for all times, sometimes it will send no -// events, and often only for some files. -// -// The default ReadDirectoryChangesW() buffer size is 64K, which is the largest -// value that is guaranteed to work with SMB filesystems. If you have many -// events in quick succession this may not be enough, and you will have to use -// [WithBufferSize] to increase the value. -type Watcher struct { - // Events sends the filesystem change events. - // - // fsnotify can send the following events; a "path" here can refer to a - // file, directory, symbolic link, or special file like a FIFO. - // - // fsnotify.Create A new path was created; this may be followed by one - // or more Write events if data also gets written to a - // file. - // - // fsnotify.Remove A path was removed. - // - // fsnotify.Rename A path was renamed. A rename is always sent with the - // old path as Event.Name, and a Create event will be - // sent with the new name. Renames are only sent for - // paths that are currently watched; e.g. moving an - // unmonitored file into a monitored directory will - // show up as just a Create. Similarly, renaming a file - // to outside a monitored directory will show up as - // only a Rename. - // - // fsnotify.Write A file or named pipe was written to. A Truncate will - // also trigger a Write. A single "write action" - // initiated by the user may show up as one or multiple - // writes, depending on when the system syncs things to - // disk. For example when compiling a large Go program - // you may get hundreds of Write events, and you may - // want to wait until you've stopped receiving them - // (see the dedup example in cmd/fsnotify). - // - // Some systems may send Write event for directories - // when the directory content changes. - // - // fsnotify.Chmod Attributes were changed. On Linux this is also sent - // when a file is removed (or more accurately, when a - // link to an inode is removed). On kqueue it's sent - // when a file is truncated. On Windows it's never - // sent. +type readDirChangesW struct { Events chan Event - - // Errors sends any errors. - // - // ErrEventOverflow is used to indicate there are too many events: - // - // - inotify: There are too many queued events (fs.inotify.max_queued_events sysctl) - // - windows: The buffer size is too small; WithBufferSize() can be used to increase it. - // - kqueue, fen: Not used. Errors chan error port windows.Handle // Handle to completion port @@ -147,48 +35,40 @@ type Watcher struct { closed bool // Set to true when Close() is first called } -// NewWatcher creates a new Watcher. -func NewWatcher() (*Watcher, error) { - return NewBufferedWatcher(50) +func newBackend(ev chan Event, errs chan error) (backend, error) { + return newBufferedBackend(50, ev, errs) } -// NewBufferedWatcher creates a new Watcher with a buffered Watcher.Events -// channel. -// -// The main use case for this is situations with a very large number of events -// where the kernel buffer size can't be increased (e.g. due to lack of -// permissions). An unbuffered Watcher will perform better for almost all use -// cases, and whenever possible you will be better off increasing the kernel -// buffers instead of adding a large userspace buffer. -func NewBufferedWatcher(sz uint) (*Watcher, error) { +func newBufferedBackend(sz uint, ev chan Event, errs chan error) (backend, error) { port, err := windows.CreateIoCompletionPort(windows.InvalidHandle, 0, 0, 0) if err != nil { return nil, os.NewSyscallError("CreateIoCompletionPort", err) } - w := &Watcher{ + w := &readDirChangesW{ + Events: ev, + Errors: errs, port: port, watches: make(watchMap), input: make(chan *input, 1), - Events: make(chan Event, sz), - Errors: make(chan error), quit: make(chan chan<- error, 1), } go w.readEvents() return w, nil } -func (w *Watcher) isClosed() bool { +func (w *readDirChangesW) isClosed() bool { w.mu.Lock() defer w.mu.Unlock() return w.closed } -func (w *Watcher) sendEvent(name string, mask uint64) bool { +func (w *readDirChangesW) sendEvent(name, renamedFrom string, mask uint64) bool { if mask == 0 { return false } event := w.newEvent(name, uint32(mask)) + event.renamedFrom = renamedFrom select { case ch := <-w.quit: w.quit <- ch @@ -198,17 +78,19 @@ func (w *Watcher) sendEvent(name string, mask uint64) bool { } // Returns true if the error was sent, or false if watcher is closed. -func (w *Watcher) sendError(err error) bool { +func (w *readDirChangesW) sendError(err error) bool { + if err == nil { + return true + } select { case w.Errors <- err: return true case <-w.quit: + return false } - return false } -// Close removes all watches and closes the Events channel. -func (w *Watcher) Close() error { +func (w *readDirChangesW) Close() error { if w.isClosed() { return nil } @@ -226,57 +108,21 @@ func (w *Watcher) Close() error { return <-ch } -// Add starts monitoring the path for changes. -// -// A path can only be watched once; watching it more than once is a no-op and will -// not return an error. Paths that do not yet exist on the filesystem cannot be -// watched. -// -// A watch will be automatically removed if the watched path is deleted or -// renamed. The exception is the Windows backend, which doesn't remove the -// watcher on renames. -// -// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special -// filesystems (/proc, /sys, etc.) generally don't work. -// -// Returns [ErrClosed] if [Watcher.Close] was called. -// -// See [Watcher.AddWith] for a version that allows adding options. -// -// # Watching directories -// -// All files in a directory are monitored, including new files that are created -// after the watcher is started. Subdirectories are not watched (i.e. it's -// non-recursive). -// -// # Watching files -// -// Watching individual files (rather than directories) is generally not -// recommended as many programs (especially editors) update files atomically: it -// will write to a temporary file which is then moved to to destination, -// overwriting the original (or some variant thereof). The watcher on the -// original file is now lost, as that no longer exists. -// -// The upshot of this is that a power failure or crash won't leave a -// half-written file. -// -// Watch the parent directory and use Event.Name to filter out files you're not -// interested in. There is an example of this in cmd/fsnotify/file.go. -func (w *Watcher) Add(name string) error { return w.AddWith(name) } +func (w *readDirChangesW) Add(name string) error { return w.AddWith(name) } -// AddWith is like [Watcher.Add], but allows adding options. When using Add() -// the defaults described below are used. -// -// Possible options are: -// -// - [WithBufferSize] sets the buffer size for the Windows backend; no-op on -// other platforms. The default is 64K (65536 bytes). -func (w *Watcher) AddWith(name string, opts ...addOpt) error { +func (w *readDirChangesW) AddWith(name string, opts ...addOpt) error { if w.isClosed() { return ErrClosed } + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s AddWith(%q)\n", + time.Now().Format("15:04:05.000000000"), filepath.ToSlash(name)) + } with := getOptions(opts...) + if !w.xSupports(with.op) { + return fmt.Errorf("%w: %s", xErrUnsupported, with.op) + } if with.bufsize < 4096 { return fmt.Errorf("fsnotify.WithBufferSize: buffer size cannot be smaller than 4096 bytes") } @@ -295,18 +141,14 @@ func (w *Watcher) AddWith(name string, opts ...addOpt) error { return <-in.reply } -// Remove stops monitoring the path for changes. -// -// Directories are always removed non-recursively. For example, if you added -// /tmp/dir and /tmp/dir/subdir then you will need to remove both. -// -// Removing a path that has not yet been added returns [ErrNonExistentWatch]. -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) Remove(name string) error { +func (w *readDirChangesW) Remove(name string) error { if w.isClosed() { return nil } + if debug { + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s Remove(%q)\n", + time.Now().Format("15:04:05.000000000"), filepath.ToSlash(name)) + } in := &input{ op: opRemoveWatch, @@ -320,11 +162,7 @@ func (w *Watcher) Remove(name string) error { return <-in.reply } -// WatchList returns all paths explicitly added with [Watcher.Add] (and are not -// yet removed). -// -// Returns nil if [Watcher.Close] was called. -func (w *Watcher) WatchList() []string { +func (w *readDirChangesW) WatchList() []string { if w.isClosed() { return nil } @@ -335,7 +173,13 @@ func (w *Watcher) WatchList() []string { entries := make([]string, 0, len(w.watches)) for _, entry := range w.watches { for _, watchEntry := range entry { - entries = append(entries, watchEntry.path) + for name := range watchEntry.names { + entries = append(entries, filepath.Join(watchEntry.path, name)) + } + // the directory itself is being watched + if watchEntry.mask != 0 { + entries = append(entries, watchEntry.path) + } } } @@ -361,7 +205,7 @@ const ( sysFSIGNORED = 0x8000 ) -func (w *Watcher) newEvent(name string, mask uint32) Event { +func (w *readDirChangesW) newEvent(name string, mask uint32) Event { e := Event{Name: name} if mask&sysFSCREATE == sysFSCREATE || mask&sysFSMOVEDTO == sysFSMOVEDTO { e.Op |= Create @@ -417,7 +261,7 @@ type ( watchMap map[uint32]indexMap ) -func (w *Watcher) wakeupReader() error { +func (w *readDirChangesW) wakeupReader() error { err := windows.PostQueuedCompletionStatus(w.port, 0, 0, nil) if err != nil { return os.NewSyscallError("PostQueuedCompletionStatus", err) @@ -425,7 +269,7 @@ func (w *Watcher) wakeupReader() error { return nil } -func (w *Watcher) getDir(pathname string) (dir string, err error) { +func (w *readDirChangesW) getDir(pathname string) (dir string, err error) { attr, err := windows.GetFileAttributes(windows.StringToUTF16Ptr(pathname)) if err != nil { return "", os.NewSyscallError("GetFileAttributes", err) @@ -439,7 +283,7 @@ func (w *Watcher) getDir(pathname string) (dir string, err error) { return } -func (w *Watcher) getIno(path string) (ino *inode, err error) { +func (w *readDirChangesW) getIno(path string) (ino *inode, err error) { h, err := windows.CreateFile(windows.StringToUTF16Ptr(path), windows.FILE_LIST_DIRECTORY, windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE|windows.FILE_SHARE_DELETE, @@ -482,9 +326,8 @@ func (m watchMap) set(ino *inode, watch *watch) { } // Must run within the I/O thread. -func (w *Watcher) addWatch(pathname string, flags uint64, bufsize int) error { - //pathname, recurse := recursivePath(pathname) - recurse := false +func (w *readDirChangesW) addWatch(pathname string, flags uint64, bufsize int) error { + pathname, recurse := recursivePath(pathname) dir, err := w.getDir(pathname) if err != nil { @@ -538,7 +381,7 @@ func (w *Watcher) addWatch(pathname string, flags uint64, bufsize int) error { } // Must run within the I/O thread. -func (w *Watcher) remWatch(pathname string) error { +func (w *readDirChangesW) remWatch(pathname string) error { pathname, recurse := recursivePath(pathname) dir, err := w.getDir(pathname) @@ -566,11 +409,11 @@ func (w *Watcher) remWatch(pathname string) error { return fmt.Errorf("%w: %s", ErrNonExistentWatch, pathname) } if pathname == dir { - w.sendEvent(watch.path, watch.mask&sysFSIGNORED) + w.sendEvent(watch.path, "", watch.mask&sysFSIGNORED) watch.mask = 0 } else { name := filepath.Base(pathname) - w.sendEvent(filepath.Join(watch.path, name), watch.names[name]&sysFSIGNORED) + w.sendEvent(filepath.Join(watch.path, name), "", watch.names[name]&sysFSIGNORED) delete(watch.names, name) } @@ -578,23 +421,23 @@ func (w *Watcher) remWatch(pathname string) error { } // Must run within the I/O thread. -func (w *Watcher) deleteWatch(watch *watch) { +func (w *readDirChangesW) deleteWatch(watch *watch) { for name, mask := range watch.names { if mask&provisional == 0 { - w.sendEvent(filepath.Join(watch.path, name), mask&sysFSIGNORED) + w.sendEvent(filepath.Join(watch.path, name), "", mask&sysFSIGNORED) } delete(watch.names, name) } if watch.mask != 0 { if watch.mask&provisional == 0 { - w.sendEvent(watch.path, watch.mask&sysFSIGNORED) + w.sendEvent(watch.path, "", watch.mask&sysFSIGNORED) } watch.mask = 0 } } // Must run within the I/O thread. -func (w *Watcher) startRead(watch *watch) error { +func (w *readDirChangesW) startRead(watch *watch) error { err := windows.CancelIo(watch.ino.handle) if err != nil { w.sendError(os.NewSyscallError("CancelIo", err)) @@ -624,7 +467,7 @@ func (w *Watcher) startRead(watch *watch) error { err := os.NewSyscallError("ReadDirectoryChanges", rdErr) if rdErr == windows.ERROR_ACCESS_DENIED && watch.mask&provisional == 0 { // Watched directory was probably removed - w.sendEvent(watch.path, watch.mask&sysFSDELETESELF) + w.sendEvent(watch.path, "", watch.mask&sysFSDELETESELF) err = nil } w.deleteWatch(watch) @@ -637,7 +480,7 @@ func (w *Watcher) startRead(watch *watch) error { // readEvents reads from the I/O completion port, converts the // received events into Event objects and sends them via the Events channel. // Entry point to the I/O thread. -func (w *Watcher) readEvents() { +func (w *readDirChangesW) readEvents() { var ( n uint32 key uintptr @@ -700,7 +543,7 @@ func (w *Watcher) readEvents() { } case windows.ERROR_ACCESS_DENIED: // Watched directory was probably removed - w.sendEvent(watch.path, watch.mask&sysFSDELETESELF) + w.sendEvent(watch.path, "", watch.mask&sysFSDELETESELF) w.deleteWatch(watch) w.startRead(watch) continue @@ -733,6 +576,10 @@ func (w *Watcher) readEvents() { name := windows.UTF16ToString(buf) fullname := filepath.Join(watch.path, name) + if debug { + internal.Debug(fullname, raw.Action) + } + var mask uint64 switch raw.Action { case windows.FILE_ACTION_REMOVED: @@ -761,21 +608,22 @@ func (w *Watcher) readEvents() { } } - sendNameEvent := func() { - w.sendEvent(fullname, watch.names[name]&mask) - } if raw.Action != windows.FILE_ACTION_RENAMED_NEW_NAME { - sendNameEvent() + w.sendEvent(fullname, "", watch.names[name]&mask) } if raw.Action == windows.FILE_ACTION_REMOVED { - w.sendEvent(fullname, watch.names[name]&sysFSIGNORED) + w.sendEvent(fullname, "", watch.names[name]&sysFSIGNORED) delete(watch.names, name) } - w.sendEvent(fullname, watch.mask&w.toFSnotifyFlags(raw.Action)) + if watch.rename != "" && raw.Action == windows.FILE_ACTION_RENAMED_NEW_NAME { + w.sendEvent(fullname, filepath.Join(watch.path, watch.rename), watch.mask&w.toFSnotifyFlags(raw.Action)) + } else { + w.sendEvent(fullname, "", watch.mask&w.toFSnotifyFlags(raw.Action)) + } + if raw.Action == windows.FILE_ACTION_RENAMED_NEW_NAME { - fullname = filepath.Join(watch.path, watch.rename) - sendNameEvent() + w.sendEvent(filepath.Join(watch.path, watch.rename), "", watch.names[name]&mask) } // Move to the next event in the buffer @@ -787,8 +635,7 @@ func (w *Watcher) readEvents() { // Error! if offset >= n { //lint:ignore ST1005 Windows should be capitalized - w.sendError(errors.New( - "Windows system assumed buffer larger than it is, events have likely been missed")) + w.sendError(errors.New("Windows system assumed buffer larger than it is, events have likely been missed")) break } } @@ -799,7 +646,7 @@ func (w *Watcher) readEvents() { } } -func (w *Watcher) toWindowsFlags(mask uint64) uint32 { +func (w *readDirChangesW) toWindowsFlags(mask uint64) uint32 { var m uint32 if mask&sysFSMODIFY != 0 { m |= windows.FILE_NOTIFY_CHANGE_LAST_WRITE @@ -810,7 +657,7 @@ func (w *Watcher) toWindowsFlags(mask uint64) uint32 { return m } -func (w *Watcher) toFSnotifyFlags(action uint32) uint64 { +func (w *readDirChangesW) toFSnotifyFlags(action uint32) uint64 { switch action { case windows.FILE_ACTION_ADDED: return sysFSCREATE @@ -825,3 +672,11 @@ func (w *Watcher) toFSnotifyFlags(action uint32) uint64 { } return 0 } + +func (w *readDirChangesW) xSupports(op Op) bool { + if op.Has(xUnportableOpen) || op.Has(xUnportableRead) || + op.Has(xUnportableCloseWrite) || op.Has(xUnportableCloseRead) { + return false + } + return true +} diff --git a/vendor/github.com/fsnotify/fsnotify/fsnotify.go b/vendor/github.com/fsnotify/fsnotify/fsnotify.go index 24c99cc49..0760efe91 100644 --- a/vendor/github.com/fsnotify/fsnotify/fsnotify.go +++ b/vendor/github.com/fsnotify/fsnotify/fsnotify.go @@ -3,19 +3,146 @@ // // Currently supported systems: // -// Linux 2.6.32+ via inotify -// BSD, macOS via kqueue -// Windows via ReadDirectoryChangesW -// illumos via FEN +// - Linux via inotify +// - BSD, macOS via kqueue +// - Windows via ReadDirectoryChangesW +// - illumos via FEN +// +// # FSNOTIFY_DEBUG +// +// Set the FSNOTIFY_DEBUG environment variable to "1" to print debug messages to +// stderr. This can be useful to track down some problems, especially in cases +// where fsnotify is used as an indirect dependency. +// +// Every event will be printed as soon as there's something useful to print, +// with as little processing from fsnotify. +// +// Example output: +// +// FSNOTIFY_DEBUG: 11:34:23.633087586 256:IN_CREATE → "/tmp/file-1" +// FSNOTIFY_DEBUG: 11:34:23.633202319 4:IN_ATTRIB → "/tmp/file-1" +// FSNOTIFY_DEBUG: 11:34:28.989728764 512:IN_DELETE → "/tmp/file-1" package fsnotify import ( "errors" "fmt" + "os" "path/filepath" "strings" ) +// Watcher watches a set of paths, delivering events on a channel. +// +// A watcher should not be copied (e.g. pass it by pointer, rather than by +// value). +// +// # Linux notes +// +// When a file is removed a Remove event won't be emitted until all file +// descriptors are closed, and deletes will always emit a Chmod. For example: +// +// fp := os.Open("file") +// os.Remove("file") // Triggers Chmod +// fp.Close() // Triggers Remove +// +// This is the event that inotify sends, so not much can be changed about this. +// +// The fs.inotify.max_user_watches sysctl variable specifies the upper limit +// for the number of watches per user, and fs.inotify.max_user_instances +// specifies the maximum number of inotify instances per user. Every Watcher you +// create is an "instance", and every path you add is a "watch". +// +// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and +// /proc/sys/fs/inotify/max_user_instances +// +// To increase them you can use sysctl or write the value to the /proc file: +// +// # Default values on Linux 5.18 +// sysctl fs.inotify.max_user_watches=124983 +// sysctl fs.inotify.max_user_instances=128 +// +// To make the changes persist on reboot edit /etc/sysctl.conf or +// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check +// your distro's documentation): +// +// fs.inotify.max_user_watches=124983 +// fs.inotify.max_user_instances=128 +// +// Reaching the limit will result in a "no space left on device" or "too many open +// files" error. +// +// # kqueue notes (macOS, BSD) +// +// kqueue requires opening a file descriptor for every file that's being watched; +// so if you're watching a directory with five files then that's six file +// descriptors. You will run in to your system's "max open files" limit faster on +// these platforms. +// +// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to +// control the maximum number of open files, as well as /etc/login.conf on BSD +// systems. +// +// # Windows notes +// +// Paths can be added as "C:\\path\\to\\dir", but forward slashes +// ("C:/path/to/dir") will also work. +// +// When a watched directory is removed it will always send an event for the +// directory itself, but may not send events for all files in that directory. +// Sometimes it will send events for all files, sometimes it will send no +// events, and often only for some files. +// +// The default ReadDirectoryChangesW() buffer size is 64K, which is the largest +// value that is guaranteed to work with SMB filesystems. If you have many +// events in quick succession this may not be enough, and you will have to use +// [WithBufferSize] to increase the value. +type Watcher struct { + b backend + + // Events sends the filesystem change events. + // + // fsnotify can send the following events; a "path" here can refer to a + // file, directory, symbolic link, or special file like a FIFO. + // + // fsnotify.Create A new path was created; this may be followed by one + // or more Write events if data also gets written to a + // file. + // + // fsnotify.Remove A path was removed. + // + // fsnotify.Rename A path was renamed. A rename is always sent with the + // old path as Event.Name, and a Create event will be + // sent with the new name. Renames are only sent for + // paths that are currently watched; e.g. moving an + // unmonitored file into a monitored directory will + // show up as just a Create. Similarly, renaming a file + // to outside a monitored directory will show up as + // only a Rename. + // + // fsnotify.Write A file or named pipe was written to. A Truncate will + // also trigger a Write. A single "write action" + // initiated by the user may show up as one or multiple + // writes, depending on when the system syncs things to + // disk. For example when compiling a large Go program + // you may get hundreds of Write events, and you may + // want to wait until you've stopped receiving them + // (see the dedup example in cmd/fsnotify). + // + // Some systems may send Write event for directories + // when the directory content changes. + // + // fsnotify.Chmod Attributes were changed. On Linux this is also sent + // when a file is removed (or more accurately, when a + // link to an inode is removed). On kqueue it's sent + // when a file is truncated. On Windows it's never + // sent. + Events chan Event + + // Errors sends any errors. + Errors chan error +} + // Event represents a file system notification. type Event struct { // Path to the file or directory. @@ -30,6 +157,16 @@ type Event struct { // This is a bitmask and some systems may send multiple operations at once. // Use the Event.Has() method instead of comparing with ==. Op Op + + // Create events will have this set to the old path if it's a rename. This + // only works when both the source and destination are watched. It's not + // reliable when watching individual files, only directories. + // + // For example "mv /tmp/file /tmp/rename" will emit: + // + // Event{Op: Rename, Name: "/tmp/file"} + // Event{Op: Create, Name: "/tmp/rename", RenamedFrom: "/tmp/file"} + renamedFrom string } // Op describes a set of file operations. @@ -50,7 +187,7 @@ const ( // example "remove to trash" is often a rename). Remove - // The path was renamed to something else; any watched on it will be + // The path was renamed to something else; any watches on it will be // removed. Rename @@ -60,15 +197,155 @@ const ( // get triggered very frequently by some software. For example, Spotlight // indexing on macOS, anti-virus software, backup software, etc. Chmod + + // File descriptor was opened. + // + // Only works on Linux and FreeBSD. + xUnportableOpen + + // File was read from. + // + // Only works on Linux and FreeBSD. + xUnportableRead + + // File opened for writing was closed. + // + // Only works on Linux and FreeBSD. + // + // The advantage of using this over Write is that it's more reliable than + // waiting for Write events to stop. It's also faster (if you're not + // listening to Write events): copying a file of a few GB can easily + // generate tens of thousands of Write events in a short span of time. + xUnportableCloseWrite + + // File opened for reading was closed. + // + // Only works on Linux and FreeBSD. + xUnportableCloseRead ) -// Common errors that can be reported. var ( + // ErrNonExistentWatch is used when Remove() is called on a path that's not + // added. ErrNonExistentWatch = errors.New("fsnotify: can't remove non-existent watch") - ErrEventOverflow = errors.New("fsnotify: queue or buffer overflow") - ErrClosed = errors.New("fsnotify: watcher already closed") + + // ErrClosed is used when trying to operate on a closed Watcher. + ErrClosed = errors.New("fsnotify: watcher already closed") + + // ErrEventOverflow is reported from the Errors channel when there are too + // many events: + // + // - inotify: inotify returns IN_Q_OVERFLOW – because there are too + // many queued events (the fs.inotify.max_queued_events + // sysctl can be used to increase this). + // - windows: The buffer size is too small; WithBufferSize() can be used to increase it. + // - kqueue, fen: Not used. + ErrEventOverflow = errors.New("fsnotify: queue or buffer overflow") + + // ErrUnsupported is returned by AddWith() when WithOps() specified an + // Unportable event that's not supported on this platform. + xErrUnsupported = errors.New("fsnotify: not supported with this backend") ) +// NewWatcher creates a new Watcher. +func NewWatcher() (*Watcher, error) { + ev, errs := make(chan Event), make(chan error) + b, err := newBackend(ev, errs) + if err != nil { + return nil, err + } + return &Watcher{b: b, Events: ev, Errors: errs}, nil +} + +// NewBufferedWatcher creates a new Watcher with a buffered Watcher.Events +// channel. +// +// The main use case for this is situations with a very large number of events +// where the kernel buffer size can't be increased (e.g. due to lack of +// permissions). An unbuffered Watcher will perform better for almost all use +// cases, and whenever possible you will be better off increasing the kernel +// buffers instead of adding a large userspace buffer. +func NewBufferedWatcher(sz uint) (*Watcher, error) { + ev, errs := make(chan Event), make(chan error) + b, err := newBufferedBackend(sz, ev, errs) + if err != nil { + return nil, err + } + return &Watcher{b: b, Events: ev, Errors: errs}, nil +} + +// Add starts monitoring the path for changes. +// +// A path can only be watched once; watching it more than once is a no-op and will +// not return an error. Paths that do not yet exist on the filesystem cannot be +// watched. +// +// A watch will be automatically removed if the watched path is deleted or +// renamed. The exception is the Windows backend, which doesn't remove the +// watcher on renames. +// +// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special +// filesystems (/proc, /sys, etc.) generally don't work. +// +// Returns [ErrClosed] if [Watcher.Close] was called. +// +// See [Watcher.AddWith] for a version that allows adding options. +// +// # Watching directories +// +// All files in a directory are monitored, including new files that are created +// after the watcher is started. Subdirectories are not watched (i.e. it's +// non-recursive). +// +// # Watching files +// +// Watching individual files (rather than directories) is generally not +// recommended as many programs (especially editors) update files atomically: it +// will write to a temporary file which is then moved to destination, +// overwriting the original (or some variant thereof). The watcher on the +// original file is now lost, as that no longer exists. +// +// The upshot of this is that a power failure or crash won't leave a +// half-written file. +// +// Watch the parent directory and use Event.Name to filter out files you're not +// interested in. There is an example of this in cmd/fsnotify/file.go. +func (w *Watcher) Add(path string) error { return w.b.Add(path) } + +// AddWith is like [Watcher.Add], but allows adding options. When using Add() +// the defaults described below are used. +// +// Possible options are: +// +// - [WithBufferSize] sets the buffer size for the Windows backend; no-op on +// other platforms. The default is 64K (65536 bytes). +func (w *Watcher) AddWith(path string, opts ...addOpt) error { return w.b.AddWith(path, opts...) } + +// Remove stops monitoring the path for changes. +// +// Directories are always removed non-recursively. For example, if you added +// /tmp/dir and /tmp/dir/subdir then you will need to remove both. +// +// Removing a path that has not yet been added returns [ErrNonExistentWatch]. +// +// Returns nil if [Watcher.Close] was called. +func (w *Watcher) Remove(path string) error { return w.b.Remove(path) } + +// Close removes all watches and closes the Events channel. +func (w *Watcher) Close() error { return w.b.Close() } + +// WatchList returns all paths explicitly added with [Watcher.Add] (and are not +// yet removed). +// +// Returns nil if [Watcher.Close] was called. +func (w *Watcher) WatchList() []string { return w.b.WatchList() } + +// Supports reports if all the listed operations are supported by this platform. +// +// Create, Write, Remove, Rename, and Chmod are always supported. It can only +// return false for an Op starting with Unportable. +func (w *Watcher) xSupports(op Op) bool { return w.b.xSupports(op) } + func (o Op) String() string { var b strings.Builder if o.Has(Create) { @@ -80,6 +357,18 @@ func (o Op) String() string { if o.Has(Write) { b.WriteString("|WRITE") } + if o.Has(xUnportableOpen) { + b.WriteString("|OPEN") + } + if o.Has(xUnportableRead) { + b.WriteString("|READ") + } + if o.Has(xUnportableCloseWrite) { + b.WriteString("|CLOSE_WRITE") + } + if o.Has(xUnportableCloseRead) { + b.WriteString("|CLOSE_READ") + } if o.Has(Rename) { b.WriteString("|RENAME") } @@ -100,24 +389,48 @@ func (e Event) Has(op Op) bool { return e.Op.Has(op) } // String returns a string representation of the event with their path. func (e Event) String() string { + if e.renamedFrom != "" { + return fmt.Sprintf("%-13s %q ← %q", e.Op.String(), e.Name, e.renamedFrom) + } return fmt.Sprintf("%-13s %q", e.Op.String(), e.Name) } type ( + backend interface { + Add(string) error + AddWith(string, ...addOpt) error + Remove(string) error + WatchList() []string + Close() error + xSupports(Op) bool + } addOpt func(opt *withOpts) withOpts struct { - bufsize int + bufsize int + op Op + noFollow bool + sendCreate bool } ) +var debug = func() bool { + // Check for exactly "1" (rather than mere existence) so we can add + // options/flags in the future. I don't know if we ever want that, but it's + // nice to leave the option open. + return os.Getenv("FSNOTIFY_DEBUG") == "1" +}() + var defaultOpts = withOpts{ bufsize: 65536, // 64K + op: Create | Write | Remove | Rename | Chmod, } func getOptions(opts ...addOpt) withOpts { with := defaultOpts for _, o := range opts { - o(&with) + if o != nil { + o(&with) + } } return with } @@ -136,9 +449,44 @@ func WithBufferSize(bytes int) addOpt { return func(opt *withOpts) { opt.bufsize = bytes } } +// WithOps sets which operations to listen for. The default is [Create], +// [Write], [Remove], [Rename], and [Chmod]. +// +// Excluding operations you're not interested in can save quite a bit of CPU +// time; in some use cases there may be hundreds of thousands of useless Write +// or Chmod operations per second. +// +// This can also be used to add unportable operations not supported by all +// platforms; unportable operations all start with "Unportable": +// [UnportableOpen], [UnportableRead], [UnportableCloseWrite], and +// [UnportableCloseRead]. +// +// AddWith returns an error when using an unportable operation that's not +// supported. Use [Watcher.Support] to check for support. +func withOps(op Op) addOpt { + return func(opt *withOpts) { opt.op = op } +} + +// WithNoFollow disables following symlinks, so the symlinks themselves are +// watched. +func withNoFollow() addOpt { + return func(opt *withOpts) { opt.noFollow = true } +} + +// "Internal" option for recursive watches on inotify. +func withCreate() addOpt { + return func(opt *withOpts) { opt.sendCreate = true } +} + +var enableRecurse = false + // Check if this path is recursive (ends with "/..." or "\..."), and return the // path with the /... stripped. func recursivePath(path string) (string, bool) { + path = filepath.Clean(path) + if !enableRecurse { // Only enabled in tests for now. + return path, false + } if filepath.Base(path) == "..." { return filepath.Dir(path), true } diff --git a/vendor/github.com/fsnotify/fsnotify/internal/darwin.go b/vendor/github.com/fsnotify/fsnotify/internal/darwin.go new file mode 100644 index 000000000..b0eab1009 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/darwin.go @@ -0,0 +1,39 @@ +//go:build darwin + +package internal + +import ( + "syscall" + + "golang.org/x/sys/unix" +) + +var ( + SyscallEACCES = syscall.EACCES + UnixEACCES = unix.EACCES +) + +var maxfiles uint64 + +// Go 1.19 will do this automatically: https://go-review.googlesource.com/c/go/+/393354/ +func SetRlimit() { + var l syscall.Rlimit + err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &l) + if err == nil && l.Cur != l.Max { + l.Cur = l.Max + syscall.Setrlimit(syscall.RLIMIT_NOFILE, &l) + } + maxfiles = l.Cur + + if n, err := syscall.SysctlUint32("kern.maxfiles"); err == nil && uint64(n) < maxfiles { + maxfiles = uint64(n) + } + + if n, err := syscall.SysctlUint32("kern.maxfilesperproc"); err == nil && uint64(n) < maxfiles { + maxfiles = uint64(n) + } +} + +func Maxfiles() uint64 { return maxfiles } +func Mkfifo(path string, mode uint32) error { return unix.Mkfifo(path, mode) } +func Mknod(path string, mode uint32, dev int) error { return unix.Mknod(path, mode, dev) } diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_darwin.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_darwin.go new file mode 100644 index 000000000..928319fb0 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_darwin.go @@ -0,0 +1,57 @@ +package internal + +import "golang.org/x/sys/unix" + +var names = []struct { + n string + m uint32 +}{ + {"NOTE_ABSOLUTE", unix.NOTE_ABSOLUTE}, + {"NOTE_ATTRIB", unix.NOTE_ATTRIB}, + {"NOTE_BACKGROUND", unix.NOTE_BACKGROUND}, + {"NOTE_CHILD", unix.NOTE_CHILD}, + {"NOTE_CRITICAL", unix.NOTE_CRITICAL}, + {"NOTE_DELETE", unix.NOTE_DELETE}, + {"NOTE_EXEC", unix.NOTE_EXEC}, + {"NOTE_EXIT", unix.NOTE_EXIT}, + {"NOTE_EXITSTATUS", unix.NOTE_EXITSTATUS}, + {"NOTE_EXIT_CSERROR", unix.NOTE_EXIT_CSERROR}, + {"NOTE_EXIT_DECRYPTFAIL", unix.NOTE_EXIT_DECRYPTFAIL}, + {"NOTE_EXIT_DETAIL", unix.NOTE_EXIT_DETAIL}, + {"NOTE_EXIT_DETAIL_MASK", unix.NOTE_EXIT_DETAIL_MASK}, + {"NOTE_EXIT_MEMORY", unix.NOTE_EXIT_MEMORY}, + {"NOTE_EXIT_REPARENTED", unix.NOTE_EXIT_REPARENTED}, + {"NOTE_EXTEND", unix.NOTE_EXTEND}, + {"NOTE_FFAND", unix.NOTE_FFAND}, + {"NOTE_FFCOPY", unix.NOTE_FFCOPY}, + {"NOTE_FFCTRLMASK", unix.NOTE_FFCTRLMASK}, + {"NOTE_FFLAGSMASK", unix.NOTE_FFLAGSMASK}, + {"NOTE_FFNOP", unix.NOTE_FFNOP}, + {"NOTE_FFOR", unix.NOTE_FFOR}, + {"NOTE_FORK", unix.NOTE_FORK}, + {"NOTE_FUNLOCK", unix.NOTE_FUNLOCK}, + {"NOTE_LEEWAY", unix.NOTE_LEEWAY}, + {"NOTE_LINK", unix.NOTE_LINK}, + {"NOTE_LOWAT", unix.NOTE_LOWAT}, + {"NOTE_MACHTIME", unix.NOTE_MACHTIME}, + {"NOTE_MACH_CONTINUOUS_TIME", unix.NOTE_MACH_CONTINUOUS_TIME}, + {"NOTE_NONE", unix.NOTE_NONE}, + {"NOTE_NSECONDS", unix.NOTE_NSECONDS}, + {"NOTE_OOB", unix.NOTE_OOB}, + //{"NOTE_PCTRLMASK", unix.NOTE_PCTRLMASK}, -0x100000 (?!) + {"NOTE_PDATAMASK", unix.NOTE_PDATAMASK}, + {"NOTE_REAP", unix.NOTE_REAP}, + {"NOTE_RENAME", unix.NOTE_RENAME}, + {"NOTE_REVOKE", unix.NOTE_REVOKE}, + {"NOTE_SECONDS", unix.NOTE_SECONDS}, + {"NOTE_SIGNAL", unix.NOTE_SIGNAL}, + {"NOTE_TRACK", unix.NOTE_TRACK}, + {"NOTE_TRACKERR", unix.NOTE_TRACKERR}, + {"NOTE_TRIGGER", unix.NOTE_TRIGGER}, + {"NOTE_USECONDS", unix.NOTE_USECONDS}, + {"NOTE_VM_ERROR", unix.NOTE_VM_ERROR}, + {"NOTE_VM_PRESSURE", unix.NOTE_VM_PRESSURE}, + {"NOTE_VM_PRESSURE_SUDDEN_TERMINATE", unix.NOTE_VM_PRESSURE_SUDDEN_TERMINATE}, + {"NOTE_VM_PRESSURE_TERMINATE", unix.NOTE_VM_PRESSURE_TERMINATE}, + {"NOTE_WRITE", unix.NOTE_WRITE}, +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_dragonfly.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_dragonfly.go new file mode 100644 index 000000000..3186b0c34 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_dragonfly.go @@ -0,0 +1,33 @@ +package internal + +import "golang.org/x/sys/unix" + +var names = []struct { + n string + m uint32 +}{ + {"NOTE_ATTRIB", unix.NOTE_ATTRIB}, + {"NOTE_CHILD", unix.NOTE_CHILD}, + {"NOTE_DELETE", unix.NOTE_DELETE}, + {"NOTE_EXEC", unix.NOTE_EXEC}, + {"NOTE_EXIT", unix.NOTE_EXIT}, + {"NOTE_EXTEND", unix.NOTE_EXTEND}, + {"NOTE_FFAND", unix.NOTE_FFAND}, + {"NOTE_FFCOPY", unix.NOTE_FFCOPY}, + {"NOTE_FFCTRLMASK", unix.NOTE_FFCTRLMASK}, + {"NOTE_FFLAGSMASK", unix.NOTE_FFLAGSMASK}, + {"NOTE_FFNOP", unix.NOTE_FFNOP}, + {"NOTE_FFOR", unix.NOTE_FFOR}, + {"NOTE_FORK", unix.NOTE_FORK}, + {"NOTE_LINK", unix.NOTE_LINK}, + {"NOTE_LOWAT", unix.NOTE_LOWAT}, + {"NOTE_OOB", unix.NOTE_OOB}, + {"NOTE_PCTRLMASK", unix.NOTE_PCTRLMASK}, + {"NOTE_PDATAMASK", unix.NOTE_PDATAMASK}, + {"NOTE_RENAME", unix.NOTE_RENAME}, + {"NOTE_REVOKE", unix.NOTE_REVOKE}, + {"NOTE_TRACK", unix.NOTE_TRACK}, + {"NOTE_TRACKERR", unix.NOTE_TRACKERR}, + {"NOTE_TRIGGER", unix.NOTE_TRIGGER}, + {"NOTE_WRITE", unix.NOTE_WRITE}, +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_freebsd.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_freebsd.go new file mode 100644 index 000000000..f69fdb930 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_freebsd.go @@ -0,0 +1,42 @@ +package internal + +import "golang.org/x/sys/unix" + +var names = []struct { + n string + m uint32 +}{ + {"NOTE_ABSTIME", unix.NOTE_ABSTIME}, + {"NOTE_ATTRIB", unix.NOTE_ATTRIB}, + {"NOTE_CHILD", unix.NOTE_CHILD}, + {"NOTE_CLOSE", unix.NOTE_CLOSE}, + {"NOTE_CLOSE_WRITE", unix.NOTE_CLOSE_WRITE}, + {"NOTE_DELETE", unix.NOTE_DELETE}, + {"NOTE_EXEC", unix.NOTE_EXEC}, + {"NOTE_EXIT", unix.NOTE_EXIT}, + {"NOTE_EXTEND", unix.NOTE_EXTEND}, + {"NOTE_FFAND", unix.NOTE_FFAND}, + {"NOTE_FFCOPY", unix.NOTE_FFCOPY}, + {"NOTE_FFCTRLMASK", unix.NOTE_FFCTRLMASK}, + {"NOTE_FFLAGSMASK", unix.NOTE_FFLAGSMASK}, + {"NOTE_FFNOP", unix.NOTE_FFNOP}, + {"NOTE_FFOR", unix.NOTE_FFOR}, + {"NOTE_FILE_POLL", unix.NOTE_FILE_POLL}, + {"NOTE_FORK", unix.NOTE_FORK}, + {"NOTE_LINK", unix.NOTE_LINK}, + {"NOTE_LOWAT", unix.NOTE_LOWAT}, + {"NOTE_MSECONDS", unix.NOTE_MSECONDS}, + {"NOTE_NSECONDS", unix.NOTE_NSECONDS}, + {"NOTE_OPEN", unix.NOTE_OPEN}, + {"NOTE_PCTRLMASK", unix.NOTE_PCTRLMASK}, + {"NOTE_PDATAMASK", unix.NOTE_PDATAMASK}, + {"NOTE_READ", unix.NOTE_READ}, + {"NOTE_RENAME", unix.NOTE_RENAME}, + {"NOTE_REVOKE", unix.NOTE_REVOKE}, + {"NOTE_SECONDS", unix.NOTE_SECONDS}, + {"NOTE_TRACK", unix.NOTE_TRACK}, + {"NOTE_TRACKERR", unix.NOTE_TRACKERR}, + {"NOTE_TRIGGER", unix.NOTE_TRIGGER}, + {"NOTE_USECONDS", unix.NOTE_USECONDS}, + {"NOTE_WRITE", unix.NOTE_WRITE}, +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_kqueue.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_kqueue.go new file mode 100644 index 000000000..607e683bd --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_kqueue.go @@ -0,0 +1,32 @@ +//go:build freebsd || openbsd || netbsd || dragonfly || darwin + +package internal + +import ( + "fmt" + "os" + "strings" + "time" + + "golang.org/x/sys/unix" +) + +func Debug(name string, kevent *unix.Kevent_t) { + mask := uint32(kevent.Fflags) + + var ( + l []string + unknown = mask + ) + for _, n := range names { + if mask&n.m == n.m { + l = append(l, n.n) + unknown ^= n.m + } + } + if unknown > 0 { + l = append(l, fmt.Sprintf("0x%x", unknown)) + } + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s %10d:%-60s → %q\n", + time.Now().Format("15:04:05.000000000"), mask, strings.Join(l, " | "), name) +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_linux.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_linux.go new file mode 100644 index 000000000..35c734be4 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_linux.go @@ -0,0 +1,56 @@ +package internal + +import ( + "fmt" + "os" + "strings" + "time" + + "golang.org/x/sys/unix" +) + +func Debug(name string, mask, cookie uint32) { + names := []struct { + n string + m uint32 + }{ + {"IN_ACCESS", unix.IN_ACCESS}, + {"IN_ATTRIB", unix.IN_ATTRIB}, + {"IN_CLOSE", unix.IN_CLOSE}, + {"IN_CLOSE_NOWRITE", unix.IN_CLOSE_NOWRITE}, + {"IN_CLOSE_WRITE", unix.IN_CLOSE_WRITE}, + {"IN_CREATE", unix.IN_CREATE}, + {"IN_DELETE", unix.IN_DELETE}, + {"IN_DELETE_SELF", unix.IN_DELETE_SELF}, + {"IN_IGNORED", unix.IN_IGNORED}, + {"IN_ISDIR", unix.IN_ISDIR}, + {"IN_MODIFY", unix.IN_MODIFY}, + {"IN_MOVE", unix.IN_MOVE}, + {"IN_MOVED_FROM", unix.IN_MOVED_FROM}, + {"IN_MOVED_TO", unix.IN_MOVED_TO}, + {"IN_MOVE_SELF", unix.IN_MOVE_SELF}, + {"IN_OPEN", unix.IN_OPEN}, + {"IN_Q_OVERFLOW", unix.IN_Q_OVERFLOW}, + {"IN_UNMOUNT", unix.IN_UNMOUNT}, + } + + var ( + l []string + unknown = mask + ) + for _, n := range names { + if mask&n.m == n.m { + l = append(l, n.n) + unknown ^= n.m + } + } + if unknown > 0 { + l = append(l, fmt.Sprintf("0x%x", unknown)) + } + var c string + if cookie > 0 { + c = fmt.Sprintf("(cookie: %d) ", cookie) + } + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s %-30s → %s%q\n", + time.Now().Format("15:04:05.000000000"), strings.Join(l, "|"), c, name) +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_netbsd.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_netbsd.go new file mode 100644 index 000000000..e5b3b6f69 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_netbsd.go @@ -0,0 +1,25 @@ +package internal + +import "golang.org/x/sys/unix" + +var names = []struct { + n string + m uint32 +}{ + {"NOTE_ATTRIB", unix.NOTE_ATTRIB}, + {"NOTE_CHILD", unix.NOTE_CHILD}, + {"NOTE_DELETE", unix.NOTE_DELETE}, + {"NOTE_EXEC", unix.NOTE_EXEC}, + {"NOTE_EXIT", unix.NOTE_EXIT}, + {"NOTE_EXTEND", unix.NOTE_EXTEND}, + {"NOTE_FORK", unix.NOTE_FORK}, + {"NOTE_LINK", unix.NOTE_LINK}, + {"NOTE_LOWAT", unix.NOTE_LOWAT}, + {"NOTE_PCTRLMASK", unix.NOTE_PCTRLMASK}, + {"NOTE_PDATAMASK", unix.NOTE_PDATAMASK}, + {"NOTE_RENAME", unix.NOTE_RENAME}, + {"NOTE_REVOKE", unix.NOTE_REVOKE}, + {"NOTE_TRACK", unix.NOTE_TRACK}, + {"NOTE_TRACKERR", unix.NOTE_TRACKERR}, + {"NOTE_WRITE", unix.NOTE_WRITE}, +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_openbsd.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_openbsd.go new file mode 100644 index 000000000..1dd455bc5 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_openbsd.go @@ -0,0 +1,28 @@ +package internal + +import "golang.org/x/sys/unix" + +var names = []struct { + n string + m uint32 +}{ + {"NOTE_ATTRIB", unix.NOTE_ATTRIB}, + // {"NOTE_CHANGE", unix.NOTE_CHANGE}, // Not on 386? + {"NOTE_CHILD", unix.NOTE_CHILD}, + {"NOTE_DELETE", unix.NOTE_DELETE}, + {"NOTE_EOF", unix.NOTE_EOF}, + {"NOTE_EXEC", unix.NOTE_EXEC}, + {"NOTE_EXIT", unix.NOTE_EXIT}, + {"NOTE_EXTEND", unix.NOTE_EXTEND}, + {"NOTE_FORK", unix.NOTE_FORK}, + {"NOTE_LINK", unix.NOTE_LINK}, + {"NOTE_LOWAT", unix.NOTE_LOWAT}, + {"NOTE_PCTRLMASK", unix.NOTE_PCTRLMASK}, + {"NOTE_PDATAMASK", unix.NOTE_PDATAMASK}, + {"NOTE_RENAME", unix.NOTE_RENAME}, + {"NOTE_REVOKE", unix.NOTE_REVOKE}, + {"NOTE_TRACK", unix.NOTE_TRACK}, + {"NOTE_TRACKERR", unix.NOTE_TRACKERR}, + {"NOTE_TRUNCATE", unix.NOTE_TRUNCATE}, + {"NOTE_WRITE", unix.NOTE_WRITE}, +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_solaris.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_solaris.go new file mode 100644 index 000000000..f1b2e73bd --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_solaris.go @@ -0,0 +1,45 @@ +package internal + +import ( + "fmt" + "os" + "strings" + "time" + + "golang.org/x/sys/unix" +) + +func Debug(name string, mask int32) { + names := []struct { + n string + m int32 + }{ + {"FILE_ACCESS", unix.FILE_ACCESS}, + {"FILE_MODIFIED", unix.FILE_MODIFIED}, + {"FILE_ATTRIB", unix.FILE_ATTRIB}, + {"FILE_TRUNC", unix.FILE_TRUNC}, + {"FILE_NOFOLLOW", unix.FILE_NOFOLLOW}, + {"FILE_DELETE", unix.FILE_DELETE}, + {"FILE_RENAME_TO", unix.FILE_RENAME_TO}, + {"FILE_RENAME_FROM", unix.FILE_RENAME_FROM}, + {"UNMOUNTED", unix.UNMOUNTED}, + {"MOUNTEDOVER", unix.MOUNTEDOVER}, + {"FILE_EXCEPTION", unix.FILE_EXCEPTION}, + } + + var ( + l []string + unknown = mask + ) + for _, n := range names { + if mask&n.m == n.m { + l = append(l, n.n) + unknown ^= n.m + } + } + if unknown > 0 { + l = append(l, fmt.Sprintf("0x%x", unknown)) + } + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s %10d:%-30s → %q\n", + time.Now().Format("15:04:05.000000000"), mask, strings.Join(l, " | "), name) +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/debug_windows.go b/vendor/github.com/fsnotify/fsnotify/internal/debug_windows.go new file mode 100644 index 000000000..52bf4ce53 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/debug_windows.go @@ -0,0 +1,40 @@ +package internal + +import ( + "fmt" + "os" + "path/filepath" + "strings" + "time" + + "golang.org/x/sys/windows" +) + +func Debug(name string, mask uint32) { + names := []struct { + n string + m uint32 + }{ + {"FILE_ACTION_ADDED", windows.FILE_ACTION_ADDED}, + {"FILE_ACTION_REMOVED", windows.FILE_ACTION_REMOVED}, + {"FILE_ACTION_MODIFIED", windows.FILE_ACTION_MODIFIED}, + {"FILE_ACTION_RENAMED_OLD_NAME", windows.FILE_ACTION_RENAMED_OLD_NAME}, + {"FILE_ACTION_RENAMED_NEW_NAME", windows.FILE_ACTION_RENAMED_NEW_NAME}, + } + + var ( + l []string + unknown = mask + ) + for _, n := range names { + if mask&n.m == n.m { + l = append(l, n.n) + unknown ^= n.m + } + } + if unknown > 0 { + l = append(l, fmt.Sprintf("0x%x", unknown)) + } + fmt.Fprintf(os.Stderr, "FSNOTIFY_DEBUG: %s %-65s → %q\n", + time.Now().Format("15:04:05.000000000"), strings.Join(l, " | "), filepath.ToSlash(name)) +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/freebsd.go b/vendor/github.com/fsnotify/fsnotify/internal/freebsd.go new file mode 100644 index 000000000..547df1df8 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/freebsd.go @@ -0,0 +1,31 @@ +//go:build freebsd + +package internal + +import ( + "syscall" + + "golang.org/x/sys/unix" +) + +var ( + SyscallEACCES = syscall.EACCES + UnixEACCES = unix.EACCES +) + +var maxfiles uint64 + +func SetRlimit() { + // Go 1.19 will do this automatically: https://go-review.googlesource.com/c/go/+/393354/ + var l syscall.Rlimit + err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &l) + if err == nil && l.Cur != l.Max { + l.Cur = l.Max + syscall.Setrlimit(syscall.RLIMIT_NOFILE, &l) + } + maxfiles = uint64(l.Cur) +} + +func Maxfiles() uint64 { return maxfiles } +func Mkfifo(path string, mode uint32) error { return unix.Mkfifo(path, mode) } +func Mknod(path string, mode uint32, dev int) error { return unix.Mknod(path, mode, uint64(dev)) } diff --git a/vendor/github.com/fsnotify/fsnotify/internal/internal.go b/vendor/github.com/fsnotify/fsnotify/internal/internal.go new file mode 100644 index 000000000..7daa45e19 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/internal.go @@ -0,0 +1,2 @@ +// Package internal contains some helpers. +package internal diff --git a/vendor/github.com/fsnotify/fsnotify/internal/unix.go b/vendor/github.com/fsnotify/fsnotify/internal/unix.go new file mode 100644 index 000000000..30976ce97 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/unix.go @@ -0,0 +1,31 @@ +//go:build !windows && !darwin && !freebsd + +package internal + +import ( + "syscall" + + "golang.org/x/sys/unix" +) + +var ( + SyscallEACCES = syscall.EACCES + UnixEACCES = unix.EACCES +) + +var maxfiles uint64 + +func SetRlimit() { + // Go 1.19 will do this automatically: https://go-review.googlesource.com/c/go/+/393354/ + var l syscall.Rlimit + err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, &l) + if err == nil && l.Cur != l.Max { + l.Cur = l.Max + syscall.Setrlimit(syscall.RLIMIT_NOFILE, &l) + } + maxfiles = uint64(l.Cur) +} + +func Maxfiles() uint64 { return maxfiles } +func Mkfifo(path string, mode uint32) error { return unix.Mkfifo(path, mode) } +func Mknod(path string, mode uint32, dev int) error { return unix.Mknod(path, mode, dev) } diff --git a/vendor/github.com/fsnotify/fsnotify/internal/unix2.go b/vendor/github.com/fsnotify/fsnotify/internal/unix2.go new file mode 100644 index 000000000..37dfeddc2 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/unix2.go @@ -0,0 +1,7 @@ +//go:build !windows + +package internal + +func HasPrivilegesForSymlink() bool { + return true +} diff --git a/vendor/github.com/fsnotify/fsnotify/internal/windows.go b/vendor/github.com/fsnotify/fsnotify/internal/windows.go new file mode 100644 index 000000000..a72c64954 --- /dev/null +++ b/vendor/github.com/fsnotify/fsnotify/internal/windows.go @@ -0,0 +1,41 @@ +//go:build windows + +package internal + +import ( + "errors" + + "golang.org/x/sys/windows" +) + +// Just a dummy. +var ( + SyscallEACCES = errors.New("dummy") + UnixEACCES = errors.New("dummy") +) + +func SetRlimit() {} +func Maxfiles() uint64 { return 1<<64 - 1 } +func Mkfifo(path string, mode uint32) error { return errors.New("no FIFOs on Windows") } +func Mknod(path string, mode uint32, dev int) error { return errors.New("no device nodes on Windows") } + +func HasPrivilegesForSymlink() bool { + var sid *windows.SID + err := windows.AllocateAndInitializeSid( + &windows.SECURITY_NT_AUTHORITY, + 2, + windows.SECURITY_BUILTIN_DOMAIN_RID, + windows.DOMAIN_ALIAS_RID_ADMINS, + 0, 0, 0, 0, 0, 0, + &sid) + if err != nil { + return false + } + defer windows.FreeSid(sid) + token := windows.Token(0) + member, err := token.IsMember(sid) + if err != nil { + return false + } + return member || token.IsElevated() +} diff --git a/vendor/github.com/fsnotify/fsnotify/mkdoc.zsh b/vendor/github.com/fsnotify/fsnotify/mkdoc.zsh deleted file mode 100644 index 99012ae65..000000000 --- a/vendor/github.com/fsnotify/fsnotify/mkdoc.zsh +++ /dev/null @@ -1,259 +0,0 @@ -#!/usr/bin/env zsh -[ "${ZSH_VERSION:-}" = "" ] && echo >&2 "Only works with zsh" && exit 1 -setopt err_exit no_unset pipefail extended_glob - -# Simple script to update the godoc comments on all watchers so you don't need -# to update the same comment 5 times. - -watcher=$(<<EOF -// Watcher watches a set of paths, delivering events on a channel. -// -// A watcher should not be copied (e.g. pass it by pointer, rather than by -// value). -// -// # Linux notes -// -// When a file is removed a Remove event won't be emitted until all file -// descriptors are closed, and deletes will always emit a Chmod. For example: -// -// fp := os.Open("file") -// os.Remove("file") // Triggers Chmod -// fp.Close() // Triggers Remove -// -// This is the event that inotify sends, so not much can be changed about this. -// -// The fs.inotify.max_user_watches sysctl variable specifies the upper limit -// for the number of watches per user, and fs.inotify.max_user_instances -// specifies the maximum number of inotify instances per user. Every Watcher you -// create is an "instance", and every path you add is a "watch". -// -// These are also exposed in /proc as /proc/sys/fs/inotify/max_user_watches and -// /proc/sys/fs/inotify/max_user_instances -// -// To increase them you can use sysctl or write the value to the /proc file: -// -// # Default values on Linux 5.18 -// sysctl fs.inotify.max_user_watches=124983 -// sysctl fs.inotify.max_user_instances=128 -// -// To make the changes persist on reboot edit /etc/sysctl.conf or -// /usr/lib/sysctl.d/50-default.conf (details differ per Linux distro; check -// your distro's documentation): -// -// fs.inotify.max_user_watches=124983 -// fs.inotify.max_user_instances=128 -// -// Reaching the limit will result in a "no space left on device" or "too many open -// files" error. -// -// # kqueue notes (macOS, BSD) -// -// kqueue requires opening a file descriptor for every file that's being watched; -// so if you're watching a directory with five files then that's six file -// descriptors. You will run in to your system's "max open files" limit faster on -// these platforms. -// -// The sysctl variables kern.maxfiles and kern.maxfilesperproc can be used to -// control the maximum number of open files, as well as /etc/login.conf on BSD -// systems. -// -// # Windows notes -// -// Paths can be added as "C:\\path\\to\\dir", but forward slashes -// ("C:/path/to/dir") will also work. -// -// When a watched directory is removed it will always send an event for the -// directory itself, but may not send events for all files in that directory. -// Sometimes it will send events for all times, sometimes it will send no -// events, and often only for some files. -// -// The default ReadDirectoryChangesW() buffer size is 64K, which is the largest -// value that is guaranteed to work with SMB filesystems. If you have many -// events in quick succession this may not be enough, and you will have to use -// [WithBufferSize] to increase the value. -EOF -) - -new=$(<<EOF -// NewWatcher creates a new Watcher. -EOF -) - -newbuffered=$(<<EOF -// NewBufferedWatcher creates a new Watcher with a buffered Watcher.Events -// channel. -// -// The main use case for this is situations with a very large number of events -// where the kernel buffer size can't be increased (e.g. due to lack of -// permissions). An unbuffered Watcher will perform better for almost all use -// cases, and whenever possible you will be better off increasing the kernel -// buffers instead of adding a large userspace buffer. -EOF -) - -add=$(<<EOF -// Add starts monitoring the path for changes. -// -// A path can only be watched once; watching it more than once is a no-op and will -// not return an error. Paths that do not yet exist on the filesystem cannot be -// watched. -// -// A watch will be automatically removed if the watched path is deleted or -// renamed. The exception is the Windows backend, which doesn't remove the -// watcher on renames. -// -// Notifications on network filesystems (NFS, SMB, FUSE, etc.) or special -// filesystems (/proc, /sys, etc.) generally don't work. -// -// Returns [ErrClosed] if [Watcher.Close] was called. -// -// See [Watcher.AddWith] for a version that allows adding options. -// -// # Watching directories -// -// All files in a directory are monitored, including new files that are created -// after the watcher is started. Subdirectories are not watched (i.e. it's -// non-recursive). -// -// # Watching files -// -// Watching individual files (rather than directories) is generally not -// recommended as many programs (especially editors) update files atomically: it -// will write to a temporary file which is then moved to to destination, -// overwriting the original (or some variant thereof). The watcher on the -// original file is now lost, as that no longer exists. -// -// The upshot of this is that a power failure or crash won't leave a -// half-written file. -// -// Watch the parent directory and use Event.Name to filter out files you're not -// interested in. There is an example of this in cmd/fsnotify/file.go. -EOF -) - -addwith=$(<<EOF -// AddWith is like [Watcher.Add], but allows adding options. When using Add() -// the defaults described below are used. -// -// Possible options are: -// -// - [WithBufferSize] sets the buffer size for the Windows backend; no-op on -// other platforms. The default is 64K (65536 bytes). -EOF -) - -remove=$(<<EOF -// Remove stops monitoring the path for changes. -// -// Directories are always removed non-recursively. For example, if you added -// /tmp/dir and /tmp/dir/subdir then you will need to remove both. -// -// Removing a path that has not yet been added returns [ErrNonExistentWatch]. -// -// Returns nil if [Watcher.Close] was called. -EOF -) - -close=$(<<EOF -// Close removes all watches and closes the Events channel. -EOF -) - -watchlist=$(<<EOF -// WatchList returns all paths explicitly added with [Watcher.Add] (and are not -// yet removed). -// -// Returns nil if [Watcher.Close] was called. -EOF -) - -events=$(<<EOF - // Events sends the filesystem change events. - // - // fsnotify can send the following events; a "path" here can refer to a - // file, directory, symbolic link, or special file like a FIFO. - // - // fsnotify.Create A new path was created; this may be followed by one - // or more Write events if data also gets written to a - // file. - // - // fsnotify.Remove A path was removed. - // - // fsnotify.Rename A path was renamed. A rename is always sent with the - // old path as Event.Name, and a Create event will be - // sent with the new name. Renames are only sent for - // paths that are currently watched; e.g. moving an - // unmonitored file into a monitored directory will - // show up as just a Create. Similarly, renaming a file - // to outside a monitored directory will show up as - // only a Rename. - // - // fsnotify.Write A file or named pipe was written to. A Truncate will - // also trigger a Write. A single "write action" - // initiated by the user may show up as one or multiple - // writes, depending on when the system syncs things to - // disk. For example when compiling a large Go program - // you may get hundreds of Write events, and you may - // want to wait until you've stopped receiving them - // (see the dedup example in cmd/fsnotify). - // - // Some systems may send Write event for directories - // when the directory content changes. - // - // fsnotify.Chmod Attributes were changed. On Linux this is also sent - // when a file is removed (or more accurately, when a - // link to an inode is removed). On kqueue it's sent - // when a file is truncated. On Windows it's never - // sent. -EOF -) - -errors=$(<<EOF - // Errors sends any errors. - // - // ErrEventOverflow is used to indicate there are too many events: - // - // - inotify: There are too many queued events (fs.inotify.max_queued_events sysctl) - // - windows: The buffer size is too small; WithBufferSize() can be used to increase it. - // - kqueue, fen: Not used. -EOF -) - -set-cmt() { - local pat=$1 - local cmt=$2 - - IFS=$'\n' local files=($(grep -n $pat backend_*~*_test.go)) - for f in $files; do - IFS=':' local fields=($=f) - local file=$fields[1] - local end=$(( $fields[2] - 1 )) - - # Find start of comment. - local start=0 - IFS=$'\n' local lines=($(head -n$end $file)) - for (( i = 1; i <= $#lines; i++ )); do - local line=$lines[-$i] - if ! grep -q '^[[:space:]]*//' <<<$line; then - start=$(( end - (i - 2) )) - break - fi - done - - head -n $(( start - 1 )) $file >/tmp/x - print -r -- $cmt >>/tmp/x - tail -n+$(( end + 1 )) $file >>/tmp/x - mv /tmp/x $file - done -} - -set-cmt '^type Watcher struct ' $watcher -set-cmt '^func NewWatcher(' $new -set-cmt '^func NewBufferedWatcher(' $newbuffered -set-cmt '^func (w \*Watcher) Add(' $add -set-cmt '^func (w \*Watcher) AddWith(' $addwith -set-cmt '^func (w \*Watcher) Remove(' $remove -set-cmt '^func (w \*Watcher) Close(' $close -set-cmt '^func (w \*Watcher) WatchList(' $watchlist -set-cmt '^[[:space:]]*Events *chan Event$' $events -set-cmt '^[[:space:]]*Errors *chan error$' $errors diff --git a/vendor/github.com/fsnotify/fsnotify/system_bsd.go b/vendor/github.com/fsnotify/fsnotify/system_bsd.go index 4322b0b88..f65e8fe3e 100644 --- a/vendor/github.com/fsnotify/fsnotify/system_bsd.go +++ b/vendor/github.com/fsnotify/fsnotify/system_bsd.go @@ -1,5 +1,4 @@ //go:build freebsd || openbsd || netbsd || dragonfly -// +build freebsd openbsd netbsd dragonfly package fsnotify diff --git a/vendor/github.com/fsnotify/fsnotify/system_darwin.go b/vendor/github.com/fsnotify/fsnotify/system_darwin.go index 5da5ffa78..a29fc7aab 100644 --- a/vendor/github.com/fsnotify/fsnotify/system_darwin.go +++ b/vendor/github.com/fsnotify/fsnotify/system_darwin.go @@ -1,5 +1,4 @@ //go:build darwin -// +build darwin package fsnotify |