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-rw-r--r--compat/cygwin.c143
-rw-r--r--compat/cygwin.h9
-rw-r--r--compat/mingw.c94
-rw-r--r--compat/mingw.h16
-rw-r--r--compat/win32.h34
5 files changed, 213 insertions, 83 deletions
diff --git a/compat/cygwin.c b/compat/cygwin.c
new file mode 100644
index 0000000..ebac148
--- /dev/null
+++ b/compat/cygwin.c
@@ -0,0 +1,143 @@
+#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 core.filemode is set, we must use the Cygwin posix
+ * stat/lstat as the Windows stat fuctions do not determine posix filemode.
+ *
+ * Note that git_cygwin_config() does NOT call git_default_config() and this
+ * is deliberate. Many commands read from config to establish initial
+ * values in variables and later tweak them from elsewhere (e.g. command line).
+ * init_stat() is called lazily on demand, typically much late in the program,
+ * and calling git_default_config() from here would break such variables.
+ */
+static int native_stat = 1;
+static int core_filemode;
+
+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);
+ else if (!strcmp(var, "core.filemode"))
+ core_filemode = git_config_bool(var, value);
+ return 0;
+}
+
+static int init_stat(void)
+{
+ if (have_git_dir()) {
+ git_config(git_cygwin_config, NULL);
+ if (!core_filemode && 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 0000000..a3229f5
--- /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 45733f9..3dbe6a7 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
@@ -586,12 +536,16 @@ static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
* would normally create a console window. But
* since we'll be redirecting std streams, we do
* not need the console.
+ * It is necessary to use DETACHED_PROCESS
+ * instead of CREATE_NO_WINDOW to make ssh
+ * recognize that it has no console.
*/
- flags = CREATE_NO_WINDOW;
+ flags = DETACHED_PROCESS;
} else {
/* There is already a console. If we specified
- * CREATE_NO_WINDOW here, too, Windows would
+ * DETACHED_PROCESS here, too, Windows would
* disassociate the child from the console.
+ * The same is true for CREATE_NO_WINDOW.
* Go figure!
*/
flags = 0;
diff --git a/compat/mingw.h b/compat/mingw.h
index a52e657..4f275cb 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 0000000..c26384e
--- /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;
+ }
+}