Commit a9e609945998ca49d7eec17e833b1d40f46b9995
2018-05-23T08:40:17
path: check for a symlinked .gitmodules in fs-agnostic code We still compare case-insensitively to protect more thoroughly as we don't know what specifics we'll see on the system and it's the behaviour from git.
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diff --git a/src/path.c b/src/path.c
index def669a..58a5aaf 100644
--- a/src/path.c
+++ b/src/path.c
@@ -1700,6 +1700,24 @@ GIT_INLINE(bool) verify_char(unsigned char c, unsigned int flags)
}
/*
+ * Return the length of the common prefix between str and prefix, comparing them
+ * case-insensitively (must be ASCII to match).
+ */
+GIT_INLINE(size_t) common_prefix_icase(const char *str, size_t len, const char *prefix)
+{
+ size_t count = 0;
+
+ while (len >0 && tolower(*str) == tolower(*prefix)) {
+ count++;
+ str++;
+ prefix++;
+ len--;
+ }
+
+ return count;
+}
+
+/*
* We fundamentally don't like some paths when dealing with user-inputted
* strings (in checkout or ref names): we don't want dot or dot-dot
* anywhere, we want to avoid writing weird paths on Windows that can't
@@ -1763,14 +1781,20 @@ static bool verify_component(
* specific tests, they would have already rejected `.git`.
*/
if ((flags & GIT_PATH_REJECT_DOT_GIT_HFS) == 0 &&
- (flags & GIT_PATH_REJECT_DOT_GIT_NTFS) == 0 &&
- (flags & GIT_PATH_REJECT_DOT_GIT_LITERAL) &&
- len == 4 &&
- component[0] == '.' &&
- (component[1] == 'g' || component[1] == 'G') &&
- (component[2] == 'i' || component[2] == 'I') &&
- (component[3] == 't' || component[3] == 'T'))
- return false;
+ (flags & GIT_PATH_REJECT_DOT_GIT_NTFS) == 0 &&
+ (flags & GIT_PATH_REJECT_DOT_GIT_LITERAL)) {
+ if (len >= 4 &&
+ component[0] == '.' &&
+ (component[1] == 'g' || component[1] == 'G') &&
+ (component[2] == 'i' || component[2] == 'I') &&
+ (component[3] == 't' || component[3] == 'T')) {
+ if (len == 4)
+ return false;
+
+ if (S_ISLNK(mode) && common_prefix_icase(component, len, ".gitmodules") == len)
+ return false;
+ }
+ }
return true;
}