git-update-cache: allow dot-files
We still refuse to add ".", ".." and ".git".
In theory, you could track another git-repository by allowing ".git",
but the potential for confusion is just too high.
diff --git a/update-cache.c b/update-cache.c
index e76fb9b..48b4dee 100644
--- a/update-cache.c
+++ b/update-cache.c
@@ -238,13 +238,42 @@
/*
* We fundamentally don't like some paths: we don't want
- * dot or dot-dot anywhere, and in fact, we don't even want
- * any other dot-files (.git or anything else). They
- * are hidden, for chist sake.
+ * dot or dot-dot anywhere, and for obvious reasons don't
+ * want to recurse into ".git" either.
*
* Also, we don't want double slashes or slashes at the
* end that can make pathnames ambiguous.
*/
+static int verify_dotfile(const char *rest)
+{
+ /*
+ * The first character was '.', but that
+ * has already been discarded, we now test
+ * the rest.
+ */
+ switch (*rest) {
+ /* "." is not allowed */
+ case '\0': case '/':
+ return 0;
+
+ /*
+ * ".git" followed by NUL or slash is bad. This
+ * shares the path end test with the ".." case.
+ */
+ case 'g':
+ if (rest[1] != 'i')
+ break;
+ if (rest[2] != 't')
+ break;
+ rest += 2;
+ /* fallthrough */
+ case '.':
+ if (rest[1] == '\0' || rest[1] == '/')
+ return 0;
+ }
+ return 1;
+}
+
static int verify_path(char *path)
{
char c;
@@ -256,8 +285,15 @@
if (c == '/') {
inside:
c = *path++;
- if (c != '/' && c != '.' && c != '\0')
+ switch (c) {
+ default:
continue;
+ case '/': case '\0':
+ break;
+ case '.':
+ if (verify_dotfile(path))
+ continue;
+ }
return 0;
}
c = *path++;
