Documentation: more examples.

diff --git a/update-ref.c b/update-ref.c
index 65dc3d6385756a11aac257a3ed6a9dfcb68cce53..e6fbddbab6939023c4bbea9e0b685904dc6ba0b0 100644 (file)
--- a/update-ref.c
+++ b/update-ref.c
@@ -19,7 +19,8 @@ static int re_verify(const char *path, unsigned char *oldsha1, unsigned char *cu
 int main(int argc, char **argv)
 {
        char *hex;
-       const char *refname, *value, *oldval, *path, *lockpath;
+       const char *refname, *value, *oldval, *path;
+       char *lockpath;
        unsigned char sha1[20], oldsha1[20], currsha1[20];
        int fd, written;
 
@@ -42,13 +43,15 @@ int main(int argc, char **argv)
 
        if (oldval) {
                if (memcmp(currsha1, oldsha1, 20))
-                       die("Ref %s changed to %s", refname, sha1_to_hex(currsha1));
+                       die("Ref %s is at %s but expected %s", refname, sha1_to_hex(currsha1), sha1_to_hex(oldsha1));
                /* Nothing to do? */
                if (!memcmp(oldsha1, sha1, 20))
                        exit(0);
        }
        path = strdup(path);
        lockpath = mkpath("%s.lock", path);
+       if (safe_create_leading_directories(lockpath) < 0)
+               die("Unable to create all of %s", lockpath);
 
        fd = open(lockpath, O_CREAT | O_EXCL | O_WRONLY, 0666);
        if (fd < 0)