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-rw-r--r--compat/mingw.c63
1 files changed, 57 insertions, 6 deletions
diff --git a/compat/mingw.c b/compat/mingw.c
index ab65f77..9a8e336 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -140,6 +140,39 @@ int mingw_open (const char *filename, int oflags, ...)
return fd;
}
+#undef write
+ssize_t mingw_write(int fd, const void *buf, size_t count)
+{
+ /*
+ * While write() calls to a file on a local disk are translated
+ * into WriteFile() calls with a maximum size of 64KB on Windows
+ * XP and 256KB on Vista, no such cap is placed on writes to
+ * files over the network on Windows XP. Unfortunately, there
+ * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
+ * bigger writes fail on Windows XP.
+ * So we cap to a nice 31MB here to avoid write failures over
+ * the net without changing the number of WriteFile() calls in
+ * the local case.
+ */
+ return write(fd, buf, min(count, 31 * 1024 * 1024));
+}
+
+#undef fopen
+FILE *mingw_fopen (const char *filename, const char *otype)
+{
+ if (!strcmp(filename, "/dev/null"))
+ filename = "nul";
+ return fopen(filename, otype);
+}
+
+#undef freopen
+FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
+{
+ if (filename && !strcmp(filename, "/dev/null"))
+ filename = "nul";
+ return freopen(filename, otype, stream);
+}
+
/*
* The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
* Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
@@ -259,8 +292,17 @@ int mingw_utime (const char *file_name, const struct utimbuf *times)
int fh, rc;
/* must have write permission */
- if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
- return -1;
+ DWORD attrs = GetFileAttributes(file_name);
+ if (attrs != INVALID_FILE_ATTRIBUTES &&
+ (attrs & FILE_ATTRIBUTE_READONLY)) {
+ /* ignore errors here; open() will report them */
+ SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
+ }
+
+ if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
+ rc = -1;
+ goto revert_attrs;
+ }
time_t_to_filetime(times->modtime, &mft);
time_t_to_filetime(times->actime, &aft);
@@ -270,6 +312,13 @@ int mingw_utime (const char *file_name, const struct utimbuf *times)
} else
rc = 0;
close(fh);
+
+revert_attrs:
+ if (attrs != INVALID_FILE_ATTRIBUTES &&
+ (attrs & FILE_ATTRIBUTE_READONLY)) {
+ /* ignore errors again */
+ SetFileAttributes(file_name, attrs);
+ }
return rc;
}
@@ -618,6 +667,7 @@ static int env_compare(const void *a, const void *b)
}
static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
+ const char *dir,
int prepend_cmd, int fhin, int fhout, int fherr)
{
STARTUPINFO si;
@@ -697,7 +747,7 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
memset(&pi, 0, sizeof(pi));
ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
- env ? envblk.buf : NULL, NULL, &si, &pi);
+ env ? envblk.buf : NULL, dir, &si, &pi);
if (env)
strbuf_release(&envblk);
@@ -714,10 +764,11 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
int prepend_cmd)
{
- return mingw_spawnve_fd(cmd, argv, env, prepend_cmd, 0, 1, 2);
+ return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
}
pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
+ const char *dir,
int fhin, int fhout, int fherr)
{
pid_t pid;
@@ -740,14 +791,14 @@ pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
pid = -1;
}
else {
- pid = mingw_spawnve_fd(iprog, argv, env, 1,
+ pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
fhin, fhout, fherr);
free(iprog);
}
argv[0] = argv0;
}
else
- pid = mingw_spawnve_fd(prog, argv, env, 0,
+ pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
fhin, fhout, fherr);
free(prog);
}