diff options
| -rw-r--r-- | lockfile.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lockfile.c b/lockfile.c index fb8f13bbb..920247249 100644 --- a/lockfile.c +++ b/lockfile.c @@ -28,6 +28,19 @@ static void remove_lock_file_on_signal(int signo) static int lock_file(struct lock_file *lk, const char *path) { int fd; + struct stat st; + + if ((!lstat(path, &st)) && S_ISLNK(st.st_mode)) { + ssize_t sz; + static char target[PATH_MAX]; + sz = readlink(path, target, sizeof(target)); + if (sz < 0) + warning("Cannot readlink %s", path); + else if (target[0] != '/') + warning("Cannot lock target of relative symlink %s", path); + else + path = target; + } sprintf(lk->filename, "%s.lock", path); fd = open(lk->filename, O_RDWR | O_CREAT | O_EXCL, 0666); if (0 <= fd) { |