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Diffstat (limited to 'config.c')
-rw-r--r--config.c30
1 files changed, 18 insertions, 12 deletions
diff --git a/config.c b/config.c
index f89a611..dd2de6e 100644
--- a/config.c
+++ b/config.c
@@ -715,7 +715,7 @@ int git_config_set_multivar(const char* key, const char* value,
int fd = -1, in_fd;
int ret;
char* config_filename;
- char* lock_file;
+ struct lock_file *lock = NULL;
const char* last_dot = strrchr(key, '.');
config_filename = getenv(CONFIG_ENVIRONMENT);
@@ -725,7 +725,6 @@ int git_config_set_multivar(const char* key, const char* value,
config_filename = git_path("config");
}
config_filename = xstrdup(config_filename);
- lock_file = xstrdup(mkpath("%s.lock", config_filename));
/*
* Since "key" actually contains the section name and the real
@@ -770,11 +769,12 @@ int git_config_set_multivar(const char* key, const char* value,
store.key[i] = 0;
/*
- * The lock_file serves a purpose in addition to locking: the new
+ * The lock serves a purpose in addition to locking: the new
* contents of .git/config will be written into it.
*/
- fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
- if (fd < 0 || adjust_shared_perm(lock_file)) {
+ lock = xcalloc(sizeof(struct lock_file), 1);
+ fd = hold_lock_file_for_update(lock, config_filename, 0);
+ if (fd < 0) {
fprintf(stderr, "could not lock config file\n");
free(store.key);
ret = -1;
@@ -914,25 +914,31 @@ int git_config_set_multivar(const char* key, const char* value,
goto write_err_out;
munmap(contents, contents_sz);
- unlink(config_filename);
}
- if (rename(lock_file, config_filename) < 0) {
- fprintf(stderr, "Could not rename the lock file?\n");
+ if (close(fd) || commit_lock_file(lock) < 0) {
+ fprintf(stderr, "Cannot commit config file!\n");
ret = 4;
goto out_free;
}
+ /* fd is closed, so don't try to close it below. */
+ fd = -1;
+ /*
+ * lock is committed, so don't try to roll it back below.
+ * NOTE: Since lockfile.c keeps a linked list of all created
+ * lock_file structures, it isn't safe to free(lock). It's
+ * better to just leave it hanging around.
+ */
+ lock = NULL;
ret = 0;
out_free:
if (0 <= fd)
close(fd);
+ if (lock)
+ rollback_lock_file(lock);
free(config_filename);
- if (lock_file) {
- unlink(lock_file);
- free(lock_file);
- }
return ret;
write_err_out: