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2019-01-02wrapper: move is_empty_file() and rename it as is_empty_or_missing_file()Libravatar Pranit Bauva1-0/+13
is_empty_file() can help to refactor a lot of code. This will be very helpful in porting "git bisect" to C. Suggested-by: Torsten Bögershausen <tboegi@web.de> Mentored-by: Lars Schneider <larsxschneider@gmail.com> Mentored-by: Christian Couder <chriscool@tuxfamily.org> Signed-off-by: Pranit Bauva <pranit.bauva@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-05-06Replace all die("BUG: ...") calls by BUG() onesLibravatar Johannes Schindelin1-2/+2
In d8193743e08 (usage.c: add BUG() function, 2017-05-12), a new macro was introduced to use for reporting bugs instead of die(). It was then subsequently used to convert one single caller in 588a538ae55 (setup_git_env: convert die("BUG") to BUG(), 2017-05-12). The cover letter of the patch series containing this patch (cf 20170513032414.mfrwabt4hovujde2@sigill.intra.peff.net) is not terribly clear why only one call site was converted, or what the plan is for other, similar calls to die() to report bugs. Let's just convert all remaining ones in one fell swoop. This trick was performed by this invocation: sed -i 's/die("BUG: /BUG("/g' $(git grep -l 'die("BUG' \*.c) Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-02-22wrapper: rename 'template' variablesLibravatar Brandon Williams1-20/+20
Rename C++ keyword in order to bring the codebase closer to being able to be compiled with a C++ compiler. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-11-06wrapper.c: consistently quote filenames in error messagesLibravatar Simon Ruderich1-4/+4
All other error messages in the file use quotes around the file name. This change removes two translations as "could not write to '%s'" and "could not close '%s'" are already translated and these two are the only occurrences without quotes. Signed-off-by: Simon Ruderich <simon@ruderich.org> [jc: adjusted tests I noticed were broken by the change] Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-14avoid "write_in_full(fd, buf, len) != len" patternLibravatar Jeff King1-1/+1
The return value of write_in_full() is either "-1", or the requested number of bytes[1]. If we make a partial write before seeing an error, we still return -1, not a partial value. This goes back to f6aa66cb95 (write_in_full: really write in full or return error on disk full., 2007-01-11). So checking anything except "was the return value negative" is pointless. And there are a couple of reasons not to do so: 1. It can do a funny signed/unsigned comparison. If your "len" is signed (e.g., a size_t) then the compiler will promote the "-1" to its unsigned variant. This works out for "!= len" (unless you really were trying to write the maximum size_t bytes), but is a bug if you check "< len" (an example of which was fixed recently in config.c). We should avoid promoting the mental model that you need to check the length at all, so that new sites are not tempted to copy us. 2. Checking for a negative value is shorter to type, especially when the length is an expression. 3. Linus says so. In d34cf19b89 (Clean up write_in_full() users, 2007-01-11), right after the write_in_full() semantics were changed, he wrote: I really wish every "write_in_full()" user would just check against "<0" now, but this fixes the nasty and stupid ones. Appeals to authority aside, this makes it clear that writing it this way does not have an intentional benefit. It's a historical curiosity that we never bothered to clean up (and which was undoubtedly cargo-culted into new sites). So let's convert these obviously-correct cases (this includes write_str_in_full(), which is just a wrapper for write_in_full()). [1] A careful reader may notice there is one way that write_in_full() can return a different value. If we ask write() to write N bytes and get a return value that is _larger_ than N, we could return a larger total. But besides the fact that this would imply a totally broken version of write(), it would already invoke undefined behavior. Our internal remaining counter is an unsigned size_t, which means that subtracting too many byte will wrap it around to a very large number. So we'll instantly begin reading off the end of the buffer, trying to write gigabytes (or petabytes) of data. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-24Merge branch 'bw/config-h'Libravatar Junio C Hamano1-0/+1
Fix configuration codepath to pay proper attention to commondir that is used in multi-worktree situation, and isolate config API into its own header file. * bw/config-h: config: don't implicitly use gitdir or commondir config: respect commondir setup: teach discover_git_directory to respect the commondir config: don't include config.h by default config: remove git_config_iter config: create config.h
2017-06-15config: don't include config.h by defaultLibravatar Brandon Williams1-0/+1
Stop including config.h by default in cache.h. Instead only include config.h in those files which require use of the config system. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-13Merge branch 'nd/fopen-errors'Libravatar Junio C Hamano1-5/+26
We often try to open a file for reading whose existence is optional, and silently ignore errors from open/fopen; report such errors if they are not due to missing files. * nd/fopen-errors: mingw_fopen: report ENOENT for invalid file names mingw: verify that paths are not mistaken for remote nicknames log: fix memory leak in open_next_file() rerere.c: move error_errno() closer to the source system call print errno when reporting a system call error wrapper.c: make warn_on_inaccessible() static wrapper.c: add and use fopen_or_warn() wrapper.c: add and use warn_on_fopen_errors() config.mak.uname: set FREAD_READS_DIRECTORIES for Darwin, too config.mak.uname: set FREAD_READS_DIRECTORIES for Linux and FreeBSD clone: use xfopen() instead of fopen() use xfopen() in more places git_fopen: fix a sparse 'not declared' warning
2017-06-13Merge branch 'jc/noent-notdir'Libravatar Junio C Hamano1-2/+2
Our code often opens a path to an optional file, to work on its contents when we can successfully open it. We can ignore a failure to open if such an optional file does not exist, but we do want to report a failure in opening for other reasons (e.g. we got an I/O error, or the file is there, but we lack the permission to open). The exact errors we need to ignore are ENOENT (obviously) and ENOTDIR (less obvious). Instead of repeating comparison of errno with these two constants, introduce a helper function to do so. * jc/noent-notdir: treewide: use is_missing_file_error() where ENOENT and ENOTDIR are checked compat-util: is_missing_file_error()
2017-05-30treewide: use is_missing_file_error() where ENOENT and ENOTDIR are checkedLibravatar Junio C Hamano1-2/+2
Using the is_missing_file_error() helper introduced in the previous step, update all hits from $ git grep -e ENOENT --and -e ENOTDIR There are codepaths that only check ENOENT, and it is possible that some of them should be checking both. Updating them is kept out of this step deliberately, as we do not want to change behaviour in this step. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-26wrapper.c: make warn_on_inaccessible() staticLibravatar Nguyễn Thái Ngọc Duy1-5/+5
After the last patch, this function is not used outside anymore. Keep it static. Noticed-by: Ramsay Jones <ramsay@ramsayjones.plus.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-26wrapper.c: add and use fopen_or_warn()Libravatar Nguyễn Thái Ngọc Duy1-0/+11
When fopen() returns NULL, it could be because the given path does not exist, but it could also be some other errors and the caller has to check. Add a wrapper so we don't have to repeat the same error check everywhere. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-05-26wrapper.c: add and use warn_on_fopen_errors()Libravatar Nguyễn Thái Ngọc Duy1-0/+10
In many places, Git warns about an inaccessible file after a fopen() failed. To discern these cases from other cases where we want to warn about inaccessible files, introduce a new helper specifically to test whether fopen() failed because the current user lacks the permission to open file in question. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-04-23Merge branch 'dt/xgethostname-nul-termination'Libravatar Junio C Hamano1-0/+13
gethostname(2) may not NUL terminate the buffer if hostname does not fit; unfortunately there is no easy way to see if our buffer was too small, but at least this will make sure we will not end up using garbage past the end of the buffer. * dt/xgethostname-nul-termination: xgethostname: handle long hostnames use HOST_NAME_MAX to size buffers for gethostname(2)
2017-04-18xgethostname: handle long hostnamesLibravatar David Turner1-0/+13
If the full hostname doesn't fit in the buffer supplied to gethostname, POSIX does not specify whether the buffer will be null-terminated, so to be safe, we should do it ourselves. Introduce new function, xgethostname, which ensures that there is always a \0 at the end of the buffer. Signed-off-by: David Turner <dturner@twosigma.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28wrapper.c: remove unused gitmkstemps() functionLibravatar Ramsay Jones1-7/+0
The last call to the mkstemps() function was removed in commit 659488326 ("wrapper.c: delete dead function git_mkstemps()", 22-04-2016). In order to support platforms without mkstemps(), this functionality was provided, along with a Makefile build variable (NO_MKSTEMPS), by the gitmkstemps() function. Remove the dead code, along with the defunct build machinery. Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-02-28wrapper.c: remove unused git_mkstemp() functionLibravatar Ramsay Jones1-17/+0
The last caller of git_mkstemp() was removed in commit 6fec0a89 ("verify_signed_buffer: use tempfile object", 16-06-2016). Since the introduction of the 'tempfile' APIs, along with git_mkstemp_mode, it is unlikely that new callers will materialize. Remove the dead code. Signed-off-by: Ramsay Jones <ramsay@ramsayjones.plus.com> Reviewed-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-19Merge branch 'jk/write-file'Libravatar Junio C Hamano1-40/+12
General code clean-up around a helper function to write a single-liner to a file. * jk/write-file: branch: use write_file_buf instead of write_file use write_file_buf where applicable write_file: add format attribute write_file: add pointer+len variant write_file: use xopen write_file: drop "gently" form branch: use non-gentle write_file for branch description am: ignore return value of write_file() config: fix bogus fd check when setting up default config
2016-07-19Merge branch 'sb/submodule-parallel-fetch'Libravatar Junio C Hamano1-16/+27
Fix recently introduced codepaths that are involved in parallel submodule operations, which gave up on reading too early, and could have wasted CPU while attempting to write under a corner case condition. * sb/submodule-parallel-fetch: hoist out handle_nonblock function for xread and xwrite xwrite: poll on non-blocking FDs xread: retry after poll on EAGAIN/EWOULDBLOCK
2016-07-11hoist out handle_nonblock function for xread and xwriteLibravatar Eric Wong1-28/+20
At least for me, this improves the readability of xread and xwrite; hopefully allowing missing "continue" statements to be spotted more easily. Signed-off-by: Eric Wong <e@80x24.org> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-08write_file: add pointer+len variantLibravatar Jeff King1-5/+11
There are many callsites which could use write_file, but for which it is a little awkward because they have a strbuf or other pointer/len combo. Specifically: 1. write_file() takes a format string, so we have to use "%s" or "%.*s", which are ugly. 2. Using any form of "%s" does not handle embedded NULs in the output. That probably doesn't matter for our call-sites, but it's nicer not to have to worry. 3. It's less efficient; we format into another strbuf just to do the write. That's probably not measurably slow for our uses, but it's simply inelegant. We can fix this by providing a helper to write out the formatted buffer, and just calling it from write_file(). Note that we don't do the usual "complete with a newline" that write_file does. If the caller has their own buffer, there's a reasonable chance they're doing something more complicated than a single line, and they can call strbuf_complete_line() themselves. We could go even further and add strbuf_write_file(), but it doesn't save much: - write_file_buf(path, sb.buf, sb.len); + strbuf_write_file(&sb, path); It would also be somewhat asymmetric with strbuf_read_file, which actually returns errors rather than dying (and the error handling is most of the benefit of write_file() in the first place). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-08write_file: use xopenLibravatar Jeff King1-3/+1
This simplifies the code a tiny bit, and provides consistent error messages with other users of xopen(). While we're here, let's also switch to using O_WRONLY. We know we're only going to open/write/close the file, so there's no point in asking for O_RDWR. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-08write_file: drop "gently" formLibravatar Jeff King1-43/+11
There are no callers left of write_file_gently(). Let's drop it, as it doesn't seem likely for new callers to be added (since its inception, the only callers who wanted the gentle form generally just died immediately themselves, and have since been converted). While we're there, let's also drop the "int" return from write_file, as it is never meaningful (in the non-gentle form, we always either die or return 0). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-27xwrite: poll on non-blocking FDsLibravatar Eric Wong1-2/+20
write(2) can hit the same EAGAIN/EWOULDBLOCK errors as read(2), so busy-looping on a non-blocking FD is a waste of resources. Currently, I do not know of a way for this happen: * the NonBlocking directive in systemd does not apply to stdin, stdout, or stderr. * xinetd provides no way to set the non-blocking flag at all But theoretically, it's possible a careless C10K HTTP server could use pipe2(..., O_NONBLOCK) to setup a pipe for git-http-backend with only the intent to use non-blocking reads; but accidentally leave non-blocking set on the write end passed as stdout to git-upload-pack. Followup-to: 1079c4be0b720 ("xread: poll on non blocking fds") Signed-off-by: Eric Wong <e@80x24.org> Reviewed-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-06-27xread: retry after poll on EAGAIN/EWOULDBLOCKLibravatar Eric Wong1-0/+1
We should continue to loop after EAGAIN/EWOULDBLOCK as the intent of xread is to try until there is available data, EOF, or an unrecoverable error. Fixes: 1079c4be0b720 ("xread: poll on non blocking fds") Signed-off-by: Eric Wong <e@80x24.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-17Merge branch 'nd/error-errno'Libravatar Junio C Hamano1-2/+2
The code for warning_errno/die_errno has been refactored and a new error_errno() reporting helper is introduced. * nd/error-errno: (41 commits) wrapper.c: use warning_errno() vcs-svn: use error_errno() upload-pack.c: use error_errno() unpack-trees.c: use error_errno() transport-helper.c: use error_errno() sha1_file.c: use {error,die,warning}_errno() server-info.c: use error_errno() sequencer.c: use error_errno() run-command.c: use error_errno() rerere.c: use error_errno() and warning_errno() reachable.c: use error_errno() mailmap.c: use error_errno() ident.c: use warning_errno() http.c: use error_errno() and warning_errno() grep.c: use error_errno() gpg-interface.c: use error_errno() fast-import.c: use error_errno() entry.c: use error_errno() editor.c: use error_errno() diff-no-index.c: use error_errno() ...
2016-05-09wrapper.c: use warning_errno()Libravatar Nguyễn Thái Ngọc Duy1-2/+2
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-04-22wrapper.c: delete dead function git_mkstemps()Libravatar Nguyễn Thái Ngọc Duy1-17/+0
Its last call site was replaced by mks_tempfile_ts() in 284098f (diff: use tempfile module - 2015-08-12) and there's a good chance mks_tempfile_ts will continue to successfully handle this job. Delete it. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-02-26Merge branch 'jk/tighten-alloc'Libravatar Junio C Hamano1-0/+3
Update various codepaths to avoid manually-counted malloc(). * jk/tighten-alloc: (22 commits) ewah: convert to REALLOC_ARRAY, etc convert ewah/bitmap code to use xmalloc diff_populate_gitlink: use a strbuf transport_anonymize_url: use xstrfmt git-compat-util: drop mempcpy compat code sequencer: simplify memory allocation of get_message test-path-utils: fix normalize_path_copy output buffer size fetch-pack: simplify add_sought_entry fast-import: simplify allocation in start_packfile write_untracked_extension: use FLEX_ALLOC helper prepare_{git,shell}_cmd: use argv_array use st_add and st_mult for allocation size computation convert trivial cases to FLEX_ARRAY macros use xmallocz to avoid size arithmetic convert trivial cases to ALLOC_ARRAY convert manual allocations to argv_array argv-array: add detach function add helpers for allocating flex-array structs harden REALLOC_ARRAY and xcalloc against size_t overflow tree-diff: catch integer overflow in combine_diff_path allocation ...
2016-02-22harden REALLOC_ARRAY and xcalloc against size_t overflowLibravatar Jeff King1-0/+3
REALLOC_ARRAY inherently involves a multiplication which can overflow size_t, resulting in a much smaller buffer than we think we've allocated. We can easily harden it by using st_mult() to check for overflow. Likewise, we can add ALLOC_ARRAY to do the same thing for xmalloc calls. xcalloc() should already be fine, because it takes the two factors separately, assuming the system calloc actually checks for overflow. However, before we even hit the system calloc(), we do our memory_limit_check, which involves a multiplication. Let's check for overflow ourselves so that this limit cannot be bypassed. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-02-05Merge branch 'js/fopen-harder' into maintLibravatar Junio C Hamano1-0/+13
Some codepaths used fopen(3) when opening a fixed path in $GIT_DIR (e.g. COMMIT_EDITMSG) that is meant to be left after the command is done. This however did not work well if the repository is set to be shared with core.sharedRepository and the umask of the previous user is tighter. They have been made to work better by calling unlink(2) and retrying after fopen(3) fails with EPERM. * js/fopen-harder: Handle more file writes correctly in shared repos commit: allow editing the commit message even in shared repos
2016-01-20Merge branch 'js/fopen-harder'Libravatar Junio C Hamano1-0/+13
Some codepaths used fopen(3) when opening a fixed path in $GIT_DIR (e.g. COMMIT_EDITMSG) that is meant to be left after the command is done. This however did not work well if the repository is set to be shared with core.sharedRepository and the umask of the previous user is tighter. They have been made to work better by calling unlink(2) and retrying after fopen(3) fails with EPERM. * js/fopen-harder: Handle more file writes correctly in shared repos commit: allow editing the commit message even in shared repos
2016-01-12Merge branch 'sb/submodule-parallel-fetch'Libravatar Junio C Hamano1-2/+18
Add a framework to spawn a group of processes in parallel, and use it to run "git fetch --recurse-submodules" in parallel. Rerolled and this seems to be a lot cleaner. The merge of the earlier one to 'next' has been reverted. * sb/submodule-parallel-fetch: submodules: allow parallel fetching, add tests and documentation fetch_populated_submodules: use new parallel job processing run-command: add an asynchronous parallel child processor sigchain: add command to pop all common signals strbuf: add strbuf_read_once to read without blocking xread: poll on non blocking fds submodule.c: write "Fetching submodule <foo>" to stderr
2016-01-07commit: allow editing the commit message even in shared reposLibravatar Johannes Schindelin1-0/+13
It was pointed out by Yaroslav Halchenko that the file containing the commit message is writable only by the owner, which means that we have to rewrite it from scratch in a shared repository. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-12-21Merge branch 'jk/ident-loosen-getpwuid'Libravatar Junio C Hamano1-12/+0
When getpwuid() on the system returned NULL (e.g. the user is not in the /etc/passwd file or other uid-to-name mappings), the codepath to find who the user is to record it in the reflog barfed and died. Loosen the check in this codepath, which already accepts questionable ident string (e.g. host part of the e-mail address is obviously bogus), and in general when we operate fmt_ident() function in non-strict mode. * jk/ident-loosen-getpwuid: ident: loosen getpwuid error in non-strict mode ident: keep a flag for bogus default_email ident: make xgetpwuid_self() a static local helper
2015-12-16xread: poll on non blocking fdsLibravatar Stefan Beller1-2/+18
The man page of read(2) says: EAGAIN The file descriptor fd refers to a file other than a socket and has been marked nonblocking (O_NONBLOCK), and the read would block. EAGAIN or EWOULDBLOCK The file descriptor fd refers to a socket and has been marked nonblocking (O_NONBLOCK), and the read would block. POSIX.1-2001 allows either error to be returned for this case, and does not require these constants to have the same value, so a portable application should check for both possibilities. If we get an EAGAIN or EWOULDBLOCK the fd must have set O_NONBLOCK. As the intent of xread is to read as much as possible either until the fd is EOF or an actual error occurs, we can ease the feeder of the fd by not spinning the whole time, but rather wait for it politely by not busy waiting. We should not care if the call to poll failed, as we're in an infinite loop and can only get out with the correct read(). Signed-off-by: Stefan Beller <sbeller@google.com> Acked-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-12-10ident: make xgetpwuid_self() a static local helperLibravatar Jeff King1-12/+0
This function is defined in wrapper.c, but nobody besides ident.c uses it. And nobody is likely to in the future, either, as anything that cares about the user's name should be going through the ident code. Moving it here is a cleanup of the global namespace, but it will also enable further cleanups inside ident.c. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-09-25add xsnprintf helper functionLibravatar Jeff King1-0/+16
There are a number of places in the code where we call sprintf(), with the assumption that the output will fit into the buffer. In many cases this is true (e.g., formatting a number into a large buffer), but it is hard to tell immediately from looking at the code. It would be nice if we had some run-time check to make sure that our assumption is correct (and to communicate to readers of the code that we are not blindly calling sprintf, but have actually thought about this case). This patch introduces xsnprintf, which behaves just like snprintf, except that it dies whenever the output is truncated. This acts as a sort of assert() for these cases, which can help find places where the assumption is violated (as opposed to truncating and proceeding, which may just silently give a wrong answer). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-25write_file_v(): do not leave incomplete line at the endLibravatar Junio C Hamano1-0/+1
All existing callers to this function use it to produce a text file or an empty file, and a new callsite that mimick them must end their payload with a LF. If they forget to do so, the resulting file will end with an incomplete line. Teach write_file_v() to complete the incomplete line, if exists, so that the callers do not have to. With this, the caller-side fix in builtin/am.c becomes unnecessary. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-24write_file(): drop "fatal" parameterLibravatar Junio C Hamano1-4/+24
All callers except three passed 1 for the "fatal" parameter to ask this function to die upon error, but to a casual reader of the code, it was not all obvious what that 1 meant. Instead, split the function into two based on a common write_file_v() that takes the flag, introduce write_file_gently() as a new way to attempt creating a file without dying on error, and make three callers to call it. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04wrapper: implement xfopen()Libravatar Paul Tan1-0/+21
A common usage pattern of fopen() is to check if it succeeded, and die() if it failed: FILE *fp = fopen(path, "w"); if (!fp) die_errno(_("could not open '%s' for writing"), path); Implement a wrapper function xfopen() for the above, so that we can save a few lines of code and make the die() messages consistent. Helped-by: Jeff King <peff@peff.net> Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-08-04wrapper: implement xopen()Libravatar Paul Tan1-0/+35
A common usage pattern of open() is to check if it was successful, and die() if it was not: int fd = open(path, O_WRONLY | O_CREAT, 0777); if (fd < 0) die_errno(_("Could not open '%s' for writing."), path); Implement a wrapper function xopen() that does the above so that we can save a few lines of code, and make the die() messages consistent. Helped-by: Torsten Bögershausen <tboegi@web.de> Helped-by: Jeff King <peff@peff.net> Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de> Helped-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Paul Tan <pyokagan@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-06-05help.c: wrap wait-only poll() invocation in sleep_millisec()Libravatar Johannes Sixt1-0/+5
We want to use the new function elsewhere in a moment. Signed-off-by: Johannes Sixt <j6t@kdbg.org> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-05-11Merge branch 'nd/multiple-work-trees'Libravatar Junio C Hamano1-0/+31
A replacement for contrib/workdir/git-new-workdir that does not rely on symbolic links and make sharing of objects and refs safer by making the borrowee and borrowers aware of each other. * nd/multiple-work-trees: (41 commits) prune --worktrees: fix expire vs worktree existence condition t1501: fix test with split index t2026: fix broken &&-chain t2026 needs procondition SANITY git-checkout.txt: a note about multiple checkout support for submodules checkout: add --ignore-other-wortrees checkout: pass whole struct to parse_branchname_arg instead of individual flags git-common-dir: make "modules/" per-working-directory directory checkout: do not fail if target is an empty directory t2025: add a test to make sure grafts is working from a linked checkout checkout: don't require a work tree when checking out into a new one git_path(): keep "info/sparse-checkout" per work-tree count-objects: report unused files in $GIT_DIR/worktrees/... gc: support prune --worktrees gc: factor out gc.pruneexpire parsing code gc: style change -- no SP before closing parenthesis checkout: clean up half-prepared directories in --to mode checkout: reject if the branch is already checked out elsewhere prune: strategies for linked checkouts checkout: support checking out into a new working directory ...
2015-02-25Merge branch 'jc/max-io-size-and-ssize-max'Libravatar Junio C Hamano1-1/+15
Our default I/O size (8 MiB) for large files was too large for some platforms with smaller SSIZE_MAX, leading to read(2)/write(2) failures. * jc/max-io-size-and-ssize-max: xread/xwrite: clip MAX_IO_SIZE to SSIZE_MAX
2015-02-12xread/xwrite: clip MAX_IO_SIZE to SSIZE_MAXLibravatar Junio C Hamano1-1/+15
Since 0b6806b9 (xread, xwrite: limit size of IO to 8MB, 2013-08-20), we chomp our calls to read(2) and write(2) into chunks of MAX_IO_SIZE bytes (8 MiB), because a large IO results in a bad latency when the program needs to be killed. This also brought our IO below SSIZE_MAX, which is a limit POSIX allows read(2) and write(2) to fail when the IO size exceeds it, for OS X, where a problem was originally reported. However, there are other systems that define SSIZE_MAX smaller than our default, and feeding 8 MiB to underlying read(2)/write(2) would fail. Make sure we clip our calls to the lower limit as well. Reported-by: Joachim Schmitz <jojo@schmitz-digital.de> Helped-by: Torsten Bögershausen <tboegi@web.de> Helped-by: Eric Sunshine <sunshine@sunshineco.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-12-01wrapper.c: wrapper to open a file, fprintf then closeLibravatar Nguyễn Thái Ngọc Duy1-0/+31
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-15wrapper.c: add a new function unlink_or_msgLibravatar Ronnie Sahlberg1-0/+14
This behaves like unlink_or_warn except that on failure it writes the message to its 'err' argument, which the caller can display in an appropriate way or ignore. Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Reviewed-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-15wrapper.c: remove/unlink_or_warn: simplify, treat ENOENT as successLibravatar Ronnie Sahlberg1-8/+6
Simplify the function warn_if_unremovable slightly. Additionally, change behaviour slightly. If we failed to remove the object because the object does not exist, we can still return success back to the caller since none of the callers depend on "fail if the file did not exist". Signed-off-by: Ronnie Sahlberg <sahlberg@google.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2014-10-08Merge branch 'sp/stream-clean-filter'Libravatar Junio C Hamano1-9/+10
When running a required clean filter, we do not have to mmap the original before feeding the filter. Instead, stream the file contents directly to the filter and process its output. * sp/stream-clean-filter: sha1_file: don't convert off_t to size_t too early to avoid potential die() convert: stream from fd to required clean filter to reduce used address space copy_fd(): do not close the input file descriptor mmap_limit: introduce GIT_MMAP_LIMIT to allow testing expected mmap size memory_limit: use git_env_ulong() to parse GIT_ALLOC_LIMIT config.c: add git_env_ulong() to parse environment variable convert: drop arguments other than 'path' from would_convert_to_git()