[PATCH 2/2] config: clear the executable bits (if any) on $GIT_DIR/config

[Michael Haggerty <mhagger@alum.mit.edu>]

There is no reason for $GIT_DIR/config to be executable, plus this
change will help clean up repositories affected by the bug that was
fixed by the previous commit.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
---
 config.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/config.c b/config.c
index 9e42d38..0942e5f 100644
--- a/config.c
+++ b/config.c
@@ -1653,7 +1653,15 @@ int git_config_set_multivar_in_file(const char *config_filename,
 			MAP_PRIVATE, in_fd, 0);
 		close(in_fd);
 
-		if (chmod(lock->filename, st.st_mode & 07777) < 0) {
+		/*
+		 * We make of the executable bits because (a) it
+		 * doesn't make sense to have executable bits set on
+		 * the config file, and (b) there was a bug in git 2.1
+		 * which caused the config file to be created with u+x
+		 * set, so this will help repair repositories created
+		 * with that version.
+		 */
+		if (chmod(lock->filename, st.st_mode & 07666) < 0) {
 			error("chmod on %s failed: %s",
 				lock->filename, strerror(errno));
 			ret = CONFIG_NO_WRITE;
@@ -1832,7 +1840,7 @@ int git_config_rename_section_in_file(const char *config_filename,
 
 	fstat(fileno(config_file), &st);
 
-	if (chmod(lock->filename, st.st_mode & 07777) < 0) {
+	if (chmod(lock->filename, st.st_mode & 07666) < 0) {
 		ret = error("chmod on %s failed: %s",
 				lock->filename, strerror(errno));
 		goto out;
-- 
2.1.1