create_symref: check error return from open().

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/refs.c b/refs.c
index 0840b3bab8b404f9480df89447a497963b7117fb..12e46b8bbefb35e5d402b3c8ef20dd9e4263e81a 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -331,7 +331,11 @@ int create_symref(const char *ref_target, const char *refs_heads_master)
                return -1;
        }
        lockpath = mkpath("%s.lock", git_HEAD);
-       fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666); 
+       fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
+       if (fd < 0) {
+               error("Unable to open %s for writing", lockpath);
+               return -5;
+       }
        written = write_in_full(fd, ref, len);
        close(fd);
        if (written != len) {