diff options
Diffstat (limited to 'compat')
| -rw-r--r-- | compat/cygwin.c | 137 | ||||
| -rw-r--r-- | compat/cygwin.h | 9 | ||||
| -rw-r--r-- | compat/mingw.c | 86 | ||||
| -rw-r--r-- | compat/mingw.h | 16 | ||||
| -rw-r--r-- | compat/win32.h | 34 |
5 files changed, 201 insertions, 81 deletions
diff --git a/compat/cygwin.c b/compat/cygwin.c new file mode 100644 index 0000000000..f1967532ba --- /dev/null +++ b/compat/cygwin.c @@ -0,0 +1,137 @@ +#define WIN32_LEAN_AND_MEAN +#include "../git-compat-util.h" +#include "win32.h" +#include "../cache.h" /* to read configuration */ + +static inline void filetime_to_timespec(const FILETIME *ft, struct timespec *ts) +{ + long long winTime = ((long long)ft->dwHighDateTime << 32) + + ft->dwLowDateTime; + winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */ + /* convert 100-nsecond interval to seconds and nanoseconds */ + ts->tv_sec = (time_t)(winTime/10000000); + ts->tv_nsec = (long)(winTime - ts->tv_sec*10000000LL) * 100; +} + +#define size_to_blocks(s) (((s)+511)/512) + +/* do_stat is a common implementation for cygwin_lstat and cygwin_stat. + * + * To simplify its logic, in the case of cygwin symlinks, this implementation + * falls back to the cygwin version of stat/lstat, which is provided as the + * last argument. + */ +static int do_stat(const char *file_name, struct stat *buf, stat_fn_t cygstat) +{ + WIN32_FILE_ATTRIBUTE_DATA fdata; + + if (file_name[0] == '/') + return cygstat (file_name, buf); + + if (!(errno = get_file_attr(file_name, &fdata))) { + /* + * If the system attribute is set and it is not a directory then + * it could be a symbol link created in the nowinsymlinks mode. + * Normally, Cygwin works in the winsymlinks mode, so this situation + * is very unlikely. For the sake of simplicity of our code, let's + * Cygwin to handle it. + */ + if ((fdata.dwFileAttributes & FILE_ATTRIBUTE_SYSTEM) && + !(fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) + return cygstat(file_name, buf); + + /* fill out the stat structure */ + buf->st_dev = buf->st_rdev = 0; /* not used by Git */ + buf->st_ino = 0; + buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); + buf->st_nlink = 1; + buf->st_uid = buf->st_gid = 0; +#ifdef __CYGWIN_USE_BIG_TYPES__ + buf->st_size = ((_off64_t)fdata.nFileSizeHigh << 32) + + fdata.nFileSizeLow; +#else + buf->st_size = (off_t)fdata.nFileSizeLow; +#endif + buf->st_blocks = size_to_blocks(buf->st_size); + filetime_to_timespec(&fdata.ftLastAccessTime, &buf->st_atim); + filetime_to_timespec(&fdata.ftLastWriteTime, &buf->st_mtim); + filetime_to_timespec(&fdata.ftCreationTime, &buf->st_ctim); + return 0; + } else if (errno == ENOENT) { + /* + * In the winsymlinks mode (which is the default), Cygwin + * emulates symbol links using Windows shortcut files. These + * files are formed by adding .lnk extension. So, if we have + * not found the specified file name, it could be that it is + * a symbol link. Let's Cygwin to deal with that. + */ + return cygstat(file_name, buf); + } + return -1; +} + +/* We provide our own lstat/stat functions, since the provided Cygwin versions + * of these functions are too slow. These stat functions are tailored for Git's + * usage, and therefore they are not meant to be complete and correct emulation + * of lstat/stat functionality. + */ +static int cygwin_lstat(const char *path, struct stat *buf) +{ + return do_stat(path, buf, lstat); +} + +static int cygwin_stat(const char *path, struct stat *buf) +{ + return do_stat(path, buf, stat); +} + + +/* + * At start up, we are trying to determine whether Win32 API or cygwin stat + * functions should be used. The choice is determined by core.ignorecygwinfstricks. + * Reading this option is not always possible immediately as git_dir may be + * not be set yet. So until it is set, use cygwin lstat/stat functions. + * However, if the trust_executable_bit is set, we must use the Cygwin posix + * stat/lstat as the Windows stat fuctions do not determine posix filemode. + */ +static int native_stat = 1; +extern int trust_executable_bit; + +static int git_cygwin_config(const char *var, const char *value, void *cb) +{ + if (!strcmp(var, "core.ignorecygwinfstricks")) { + native_stat = git_config_bool(var, value); + return 0; + } + return git_default_config(var, value, cb); +} + +static int init_stat(void) +{ + if (have_git_dir()) { + git_config(git_cygwin_config, NULL); + if (!trust_executable_bit && native_stat) { + cygwin_stat_fn = cygwin_stat; + cygwin_lstat_fn = cygwin_lstat; + } else { + cygwin_stat_fn = stat; + cygwin_lstat_fn = lstat; + } + return 0; + } + return 1; +} + +static int cygwin_stat_stub(const char *file_name, struct stat *buf) +{ + return (init_stat() ? stat : *cygwin_stat_fn)(file_name, buf); +} + +static int cygwin_lstat_stub(const char *file_name, struct stat *buf) +{ + return (init_stat() ? lstat : *cygwin_lstat_fn)(file_name, buf); +} + +stat_fn_t cygwin_stat_fn = cygwin_stat_stub; +stat_fn_t cygwin_lstat_fn = cygwin_lstat_stub; + diff --git a/compat/cygwin.h b/compat/cygwin.h new file mode 100644 index 0000000000..a3229f5b4f --- /dev/null +++ b/compat/cygwin.h @@ -0,0 +1,9 @@ +#include <sys/types.h> +#include <sys/stat.h> + +typedef int (*stat_fn_t)(const char*, struct stat*); +extern stat_fn_t cygwin_stat_fn; +extern stat_fn_t cygwin_lstat_fn; + +#define stat(path, buf) (*cygwin_stat_fn)(path, buf) +#define lstat(path, buf) (*cygwin_lstat_fn)(path, buf) diff --git a/compat/mingw.c b/compat/mingw.c index 772cad510d..09858f6c59 100644 --- a/compat/mingw.c +++ b/compat/mingw.c @@ -1,4 +1,5 @@ #include "../git-compat-util.h" +#include "win32.h" #include "../strbuf.h" unsigned int _CRT_fmode = _O_BINARY; @@ -31,12 +32,6 @@ static inline time_t filetime_to_time_t(const FILETIME *ft) return (time_t)winTime; } -static inline size_t size_to_blocks(size_t s) -{ - return (s+511)/512; -} - -extern int _getdrive( void ); /* We keep the do_lstat code in a separate function to avoid recursion. * When a path ends with a slash, the stat will fail with ENOENT. In * this case, we strip the trailing slashes and stat again. @@ -45,46 +40,19 @@ static int do_lstat(const char *file_name, struct stat *buf) { WIN32_FILE_ATTRIBUTE_DATA fdata; - if (GetFileAttributesExA(file_name, GetFileExInfoStandard, &fdata)) { - int fMode = S_IREAD; - if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) - fMode |= S_IFDIR; - else - fMode |= S_IFREG; - if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) - fMode |= S_IWRITE; - + if (!(errno = get_file_attr(file_name, &fdata))) { buf->st_ino = 0; buf->st_gid = 0; buf->st_uid = 0; - buf->st_mode = fMode; + buf->st_nlink = 1; + buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */ - buf->st_blocks = size_to_blocks(buf->st_size); - buf->st_dev = _getdrive() - 1; + buf->st_dev = buf->st_rdev = 0; /* not used by Git */ buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); - errno = 0; return 0; } - - switch (GetLastError()) { - case ERROR_ACCESS_DENIED: - case ERROR_SHARING_VIOLATION: - case ERROR_LOCK_VIOLATION: - case ERROR_SHARING_BUFFER_EXCEEDED: - errno = EACCES; - break; - case ERROR_BUFFER_OVERFLOW: - errno = ENAMETOOLONG; - break; - case ERROR_NOT_ENOUGH_MEMORY: - errno = ENOMEM; - break; - default: - errno = ENOENT; - break; - } return -1; } @@ -94,7 +62,7 @@ static int do_lstat(const char *file_name, struct stat *buf) * complete. Note that Git stat()s are redirected to mingw_lstat() * too, since Windows doesn't really handle symlinks that well. */ -int mingw_lstat(const char *file_name, struct mingw_stat *buf) +int mingw_lstat(const char *file_name, struct stat *buf) { int namelen; static char alt_name[PATH_MAX]; @@ -122,8 +90,7 @@ int mingw_lstat(const char *file_name, struct mingw_stat *buf) } #undef fstat -#undef stat -int mingw_fstat(int fd, struct mingw_stat *buf) +int mingw_fstat(int fd, struct stat *buf) { HANDLE fh = (HANDLE)_get_osfhandle(fd); BY_HANDLE_FILE_INFORMATION fdata; @@ -133,39 +100,17 @@ int mingw_fstat(int fd, struct mingw_stat *buf) return -1; } /* direct non-file handles to MS's fstat() */ - if (GetFileType(fh) != FILE_TYPE_DISK) { - struct stat st; - if (fstat(fd, &st)) - return -1; - buf->st_ino = st.st_ino; - buf->st_gid = st.st_gid; - buf->st_uid = st.st_uid; - buf->st_mode = st.st_mode; - buf->st_size = st.st_size; - buf->st_blocks = size_to_blocks(buf->st_size); - buf->st_dev = st.st_dev; - buf->st_atime = st.st_atime; - buf->st_mtime = st.st_mtime; - buf->st_ctime = st.st_ctime; - return 0; - } + if (GetFileType(fh) != FILE_TYPE_DISK) + return fstat(fd, buf); if (GetFileInformationByHandle(fh, &fdata)) { - int fMode = S_IREAD; - if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) - fMode |= S_IFDIR; - else - fMode |= S_IFREG; - if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) - fMode |= S_IWRITE; - buf->st_ino = 0; buf->st_gid = 0; buf->st_uid = 0; - buf->st_mode = fMode; + buf->st_nlink = 1; + buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes); buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */ - buf->st_blocks = size_to_blocks(buf->st_size); - buf->st_dev = _getdrive() - 1; + buf->st_dev = buf->st_rdev = 0; /* not used by Git */ buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime)); buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime)); buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime)); @@ -283,8 +228,13 @@ int poll(struct pollfd *ufds, unsigned int nfds, int timeout) { int i, pending; - if (timeout != -1) + if (timeout >= 0) { + if (nfds == 0) { + Sleep(timeout); + return 0; + } return errno = EINVAL, error("poll timeout not supported"); + } /* When there is only one fd to wait for, then we pretend that * input is available and let the actual wait happen when the diff --git a/compat/mingw.h b/compat/mingw.h index a52e657c51..4f275cb8e6 100644 --- a/compat/mingw.h +++ b/compat/mingw.h @@ -162,22 +162,12 @@ int mingw_rename(const char*, const char*); /* Use mingw_lstat() instead of lstat()/stat() and * mingw_fstat() instead of fstat() on Windows. - * struct stat is redefined because it lacks the st_blocks member. */ -struct mingw_stat { - unsigned st_mode; - time_t st_mtime, st_atime, st_ctime; - unsigned st_dev, st_ino, st_uid, st_gid; - size_t st_size; - size_t st_blocks; -}; -int mingw_lstat(const char *file_name, struct mingw_stat *buf); -int mingw_fstat(int fd, struct mingw_stat *buf); +int mingw_lstat(const char *file_name, struct stat *buf); +int mingw_fstat(int fd, struct stat *buf); #define fstat mingw_fstat #define lstat mingw_lstat -#define stat mingw_stat -static inline int mingw_stat(const char *file_name, struct mingw_stat *buf) -{ return mingw_lstat(file_name, buf); } +#define stat(x,y) mingw_lstat(x,y) int mingw_utime(const char *file_name, const struct utimbuf *times); #define utime mingw_utime diff --git a/compat/win32.h b/compat/win32.h new file mode 100644 index 0000000000..c26384e595 --- /dev/null +++ b/compat/win32.h @@ -0,0 +1,34 @@ +/* common Win32 functions for MinGW and Cygwin */ +#include <windows.h> + +static inline int file_attr_to_st_mode (DWORD attr) +{ + int fMode = S_IREAD; + if (attr & FILE_ATTRIBUTE_DIRECTORY) + fMode |= S_IFDIR; + else + fMode |= S_IFREG; + if (!(attr & FILE_ATTRIBUTE_READONLY)) + fMode |= S_IWRITE; + return fMode; +} + +static inline int get_file_attr(const char *fname, WIN32_FILE_ATTRIBUTE_DATA *fdata) +{ + if (GetFileAttributesExA(fname, GetFileExInfoStandard, fdata)) + return 0; + + switch (GetLastError()) { + case ERROR_ACCESS_DENIED: + case ERROR_SHARING_VIOLATION: + case ERROR_LOCK_VIOLATION: + case ERROR_SHARING_BUFFER_EXCEEDED: + return EACCES; + case ERROR_BUFFER_OVERFLOW: + return ENAMETOOLONG; + case ERROR_NOT_ENOUGH_MEMORY: + return ENOMEM; + default: + return ENOENT; + } +} |