diff options
authorJohannes Schindelin <>2007-04-23 08:21:25 (GMT)
committerJunio C Hamano <>2007-04-23 08:44:00 (GMT)
commitc7f34c180b7117cf60ad12a8b180eed33716e390 (patch)
parent97317061c6799765c7f2f83d8e3f4f74df469793 (diff)
dir.c(common_prefix): Fix two bugs
The function common_prefix() is used to find the common subdirectory of a couple of pathnames. When checking if the next pathname matches up with the prefix, it incorrectly checked the whole path, not just the prefix (including the slash). Thus, the expensive part of the loop was executed always. The other bug is more serious: if the first and the last pathname in the list have a longer common prefix than the common prefix for _all_ pathnames in the list, the longer one would be chosen. This bug was probably hidden by the fact that bash's wildcard expansion sorts the results, and the code just so happens to work with sorted input. Signed-off-by: Johannes Schindelin <> Signed-off-by: Junio C Hamano <>
2 files changed, 8 insertions, 1 deletions
diff --git a/dir.c b/dir.c
index b48e19d..602282b 100644
--- a/dir.c
+++ b/dir.c
@@ -24,8 +24,9 @@ int common_prefix(const char **pathspec)
prefix = slash - path + 1;
while ((next = *++pathspec) != NULL) {
int len = strlen(next);
- if (len >= prefix && !memcmp(path, next, len))
+ if (len >= prefix && !memcmp(path, next, prefix))
+ len = prefix - 1;
for (;;) {
if (!len)
return 0;
diff --git a/t/ b/t/
index 08e0352..ad8cc7d 100755
--- a/t/
+++ b/t/
@@ -104,4 +104,10 @@ test_expect_success 'add ignored ones with -f' '
git-ls-files --error-unmatch d.ig/d.if d.ig/d.ig
+mkdir 1 1/2 1/3
+touch 1/2/a 1/3/b 1/2/c
+test_expect_success 'check correct prefix detection' '
+ git add 1/2/a 1/3/b 1/2/c