Re: [PATCH 2/2] config: use chmod() instead of fchmod()

Am 16.07.2014 07:33, schrieb Johannes Sixt:

Am 16.07.2014 00:54, schrieb Karsten Blees:

quoted

There is no fchmod() on native Windows platforms (MinGW and MSVC), and the
equivalent Win32 API (SetFileInformationByHandle) requires Windows Vista.

Use chmod() instead.

Signed-off-by: Karsten Blees <redacted>
---
 config.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/config.c b/config.c
index ba882a1..9767c4b 100644
--- a/config.c
+++ b/config.c

@@ -1636,8 +1636,8 @@ int git_config_set_multivar_in_file(const char *config_filename,
 			MAP_PRIVATE, in_fd, 0);
 		close(in_fd);
 
-		if (fchmod(fd, st.st_mode & 07777) < 0) {
-			error("fchmod on %s failed: %s",
+		if (chmod(lock->filename, st.st_mode & 07777) < 0) {
+			error("chmod on %s failed: %s",
 				lock->filename, strerror(errno));
 			ret = CONFIG_NO_WRITE;
 			goto out_free;

@@ -1815,8 +1815,8 @@ int git_config_rename_section_in_file(const char *config_filename,
 
 	fstat(fileno(config_file), &st);
 
-	if (fchmod(out_fd, st.st_mode & 07777) < 0) {
-		ret = error("fchmod on %s failed: %s",
+	if (chmod(lock->filename, st.st_mode & 07777) < 0) {
+		ret = error("chmod on %s failed: %s",
 				lock->filename, strerror(errno));
 		goto out;
 	}

I assume you tested this patch on Windows. I am mildly surprised that
(on Windows) chmod() works on a file that is still open.

-- Hannes

Yes, file attributes can be set independently of open files. In fact, existing
code in git already does that in many places (via adjust_shared_perm(), which
is typically called while the file is open).

-- 
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