From d58e8d34b019d435b424811c6f972910dfac6f55 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Wed, 25 Jul 2007 16:22:55 -0700 Subject: [PATCH] When locking in a symlinked repository, try to lock the original. In a working tree prepared in new-workdir (in contrib/), some files in .git/ directory are symbolic links to the original repository. The usual sequence of lock-write-rename would break the symbolic link. Ideally we should resolve relative symbolic link with maxdepth, but I do not want to risk too elaborate patch before 1.5.3 release, so this is a minimum and trivially obvious fix. new-workdir creates its symbolic links absolute, and does not link from a symlinked workdir, so this fix should suffice for now. Signed-off-by: Junio C Hamano --- lockfile.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) 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) { -- 2.26.2