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diff --git a/symlinks.c b/symlinks.c
index 88601200114f857a57214a9bf0d02ffd39a83504..290036744bcfd390f91e75db49bf620bb12c12ea 100644 (file)
--- a/symlinks.c
+++ b/symlinks.c
* of the prefix, where the cache should use the stat() function
* instead of the lstat() function to test each path component.
*/
-static int lstat_cache(struct cache_def *cache, const char *name, int len,
- int track_flags, int prefix_len_stat_func)
+static int lstat_cache_matchlen(struct cache_def *cache,
+ const char *name, int len,
+ int *ret_flags, int track_flags,
+ int prefix_len_stat_func)
{
int match_len, last_slash, last_slash_dir, previous_slash;
- int match_flags, ret_flags, save_flags, max_len, ret;
+ int save_flags, max_len, ret;
struct stat st;
if (cache->track_flags != track_flags ||
match_len = last_slash =
longest_path_match(name, len, cache->path, cache->len,
&previous_slash);
- match_flags = cache->flags & track_flags & (FL_NOENT|FL_SYMLINK);
+ *ret_flags = cache->flags & track_flags & (FL_NOENT|FL_SYMLINK);
if (!(track_flags & FL_FULLPATH) && match_len == len)
match_len = last_slash = previous_slash;
- if (match_flags && match_len == cache->len)
- return match_flags;
+ if (*ret_flags && match_len == cache->len)
+ return match_len;
/*
* If we now have match_len > 0, we would know that
* the matched part will always be a directory.
* a substring of the cache on a path component basis,
* we can return immediately.
*/
- match_flags = track_flags & FL_DIR;
- if (match_flags && len == match_len)
- return match_flags;
+ *ret_flags = track_flags & FL_DIR;
+ if (*ret_flags && len == match_len)
+ return match_len;
}
/*
* Okay, no match from the cache so far, so now we have to
* check the rest of the path components.
*/
- ret_flags = FL_DIR;
+ *ret_flags = FL_DIR;
last_slash_dir = last_slash;
max_len = len < PATH_MAX ? len : PATH_MAX;
while (match_len < max_len) {
ret = lstat(cache->path, &st);
if (ret) {
- ret_flags = FL_LSTATERR;
+ *ret_flags = FL_LSTATERR;
if (errno == ENOENT)
- ret_flags |= FL_NOENT;
+ *ret_flags |= FL_NOENT;
} else if (S_ISDIR(st.st_mode)) {
last_slash_dir = last_slash;
continue;
} else if (S_ISLNK(st.st_mode)) {
- ret_flags = FL_SYMLINK;
+ *ret_flags = FL_SYMLINK;
} else {
- ret_flags = FL_ERR;
+ *ret_flags = FL_ERR;
}
break;
}
* path types, FL_NOENT, FL_SYMLINK and FL_DIR, can be cached
* for the moment!
*/
- save_flags = ret_flags & track_flags & (FL_NOENT|FL_SYMLINK);
+ save_flags = *ret_flags & track_flags & (FL_NOENT|FL_SYMLINK);
if (save_flags && last_slash > 0 && last_slash <= PATH_MAX) {
cache->path[last_slash] = '\0';
cache->len = last_slash;
} else {
reset_lstat_cache(cache);
}
- return ret_flags;
+ return match_len;
+}
+
+static int lstat_cache(struct cache_def *cache, const char *name, int len,
+ int track_flags, int prefix_len_stat_func)
+{
+ int flags;
+ (void)lstat_cache_matchlen(cache, name, len, &flags, track_flags,
+ prefix_len_stat_func);
+ return flags;
}
#define USE_ONLY_LSTAT 0
}
/*
- * Return non-zero if path 'name' has a leading symlink component or
+ * Return zero if path 'name' has a leading symlink component or
* if some leading path component does not exists.
+ *
+ * Return -1 if leading path exists and is a directory.
+ *
+ * Return path length if leading path exists and is neither a
+ * directory nor a symlink.
*/
-int has_symlink_or_noent_leading_path(const char *name, int len)
+int check_leading_path(const char *name, int len)
{
- struct cache_def *cache = &default_cache; /* FIXME */
- return lstat_cache(cache, name, len,
- FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT) &
- (FL_SYMLINK|FL_NOENT);
+ return threaded_check_leading_path(&default_cache, name, len);
+}
+
+/*
+ * Return zero if path 'name' has a leading symlink component or
+ * if some leading path component does not exists.
+ *
+ * Return -1 if leading path exists and is a directory.
+ *
+ * Return path length if leading path exists and is neither a
+ * directory nor a symlink.
+ */
+int threaded_check_leading_path(struct cache_def *cache, const char *name, int len)
+{
+ int flags;
+ int match_len = lstat_cache_matchlen(cache, name, len, &flags,
+ FL_SYMLINK|FL_NOENT|FL_DIR, USE_ONLY_LSTAT);
+ if (flags & FL_NOENT)
+ return 0;
+ else if (flags & FL_DIR)
+ return -1;
+ else
+ return match_len;
}
/*
*/
int has_dirs_only_path(const char *name, int len, int prefix_len)
{
- struct cache_def *cache = &default_cache; /* FIXME */
+ return threaded_has_dirs_only_path(&default_cache, name, len, prefix_len);
+}
+
+/*
+ * Return non-zero if all path components of 'name' exists as a
+ * directory. If prefix_len > 0, we will test with the stat()
+ * function instead of the lstat() function for a prefix length of
+ * 'prefix_len', thus we then allow for symlinks in the prefix part as
+ * long as those points to real existing directories.
+ */
+int threaded_has_dirs_only_path(struct cache_def *cache, const char *name, int len, int prefix_len)
+{
return lstat_cache(cache, name, len,
FL_DIR|FL_FULLPATH, prefix_len) &
FL_DIR;