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-rw-r--r--symlinks.c101
1 files changed, 38 insertions, 63 deletions
diff --git a/symlinks.c b/symlinks.c
index 1d6b35b85..886012001 100644
--- a/symlinks.c
+++ b/symlinks.c
@@ -32,19 +32,13 @@ static int longest_path_match(const char *name_a, int len_a,
return match_len;
}
-static struct cache_def {
- char path[PATH_MAX + 1];
- int len;
- int flags;
- int track_flags;
- int prefix_len_stat_func;
-} cache;
+static struct cache_def default_cache;
-static inline void reset_lstat_cache(void)
+static inline void reset_lstat_cache(struct cache_def *cache)
{
- cache.path[0] = '\0';
- cache.len = 0;
- cache.flags = 0;
+ cache->path[0] = '\0';
+ cache->len = 0;
+ cache->flags = 0;
/*
* The track_flags and prefix_len_stat_func members is only
* set by the safeguard rule inside lstat_cache()
@@ -70,23 +64,23 @@ static inline void reset_lstat_cache(void)
* 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(const char *name, int len,
+static int lstat_cache(struct cache_def *cache, const char *name, int len,
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;
struct stat st;
- if (cache.track_flags != track_flags ||
- cache.prefix_len_stat_func != prefix_len_stat_func) {
+ if (cache->track_flags != track_flags ||
+ cache->prefix_len_stat_func != prefix_len_stat_func) {
/*
* As a safeguard rule we clear the cache if the
* values of track_flags and/or prefix_len_stat_func
* does not match with the last supplied values.
*/
- reset_lstat_cache();
- cache.track_flags = track_flags;
- cache.prefix_len_stat_func = prefix_len_stat_func;
+ reset_lstat_cache(cache);
+ cache->track_flags = track_flags;
+ cache->prefix_len_stat_func = prefix_len_stat_func;
match_len = last_slash = 0;
} else {
/*
@@ -94,10 +88,14 @@ static int lstat_cache(const char *name, int len,
* the 2 "excluding" path types.
*/
match_len = last_slash =
- longest_path_match(name, len, cache.path, cache.len,
+ longest_path_match(name, len, cache->path, cache->len,
&previous_slash);
- match_flags = cache.flags & track_flags & (FL_NOENT|FL_SYMLINK);
- if (match_flags && match_len == cache.len)
+ match_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 we now have match_len > 0, we would know that
@@ -121,18 +119,18 @@ static int lstat_cache(const char *name, int len,
max_len = len < PATH_MAX ? len : PATH_MAX;
while (match_len < max_len) {
do {
- cache.path[match_len] = name[match_len];
+ cache->path[match_len] = name[match_len];
match_len++;
} while (match_len < max_len && name[match_len] != '/');
if (match_len >= max_len && !(track_flags & FL_FULLPATH))
break;
last_slash = match_len;
- cache.path[last_slash] = '\0';
+ cache->path[last_slash] = '\0';
if (last_slash <= prefix_len_stat_func)
- ret = stat(cache.path, &st);
+ ret = stat(cache->path, &st);
else
- ret = lstat(cache.path, &st);
+ ret = lstat(cache->path, &st);
if (ret) {
ret_flags = FL_LSTATERR;
@@ -156,9 +154,9 @@ static int lstat_cache(const char *name, int len,
*/
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;
- cache.flags = save_flags;
+ cache->path[last_slash] = '\0';
+ cache->len = last_slash;
+ cache->flags = save_flags;
} else if ((track_flags & FL_DIR) &&
last_slash_dir > 0 && last_slash_dir <= PATH_MAX) {
/*
@@ -172,53 +170,31 @@ static int lstat_cache(const char *name, int len,
* can still cache the path components before the last
* one (the found symlink or non-existing component).
*/
- cache.path[last_slash_dir] = '\0';
- cache.len = last_slash_dir;
- cache.flags = FL_DIR;
+ cache->path[last_slash_dir] = '\0';
+ cache->len = last_slash_dir;
+ cache->flags = FL_DIR;
} else {
- reset_lstat_cache();
+ reset_lstat_cache(cache);
}
return ret_flags;
}
-/*
- * Invalidate the given 'name' from the cache, if 'name' matches
- * completely with the cache.
- */
-void invalidate_lstat_cache(const char *name, int len)
-{
- int match_len, previous_slash;
-
- match_len = longest_path_match(name, len, cache.path, cache.len,
- &previous_slash);
- if (len == match_len) {
- if ((cache.track_flags & FL_DIR) && previous_slash > 0) {
- cache.path[previous_slash] = '\0';
- cache.len = previous_slash;
- cache.flags = FL_DIR;
- } else
- reset_lstat_cache();
- }
-}
+#define USE_ONLY_LSTAT 0
/*
- * Completely clear the contents of the cache
+ * Return non-zero if path 'name' has a leading symlink component
*/
-void clear_lstat_cache(void)
+int threaded_has_symlink_leading_path(struct cache_def *cache, const char *name, int len)
{
- reset_lstat_cache();
+ return lstat_cache(cache, name, len, FL_SYMLINK|FL_DIR, USE_ONLY_LSTAT) & FL_SYMLINK;
}
-#define USE_ONLY_LSTAT 0
-
/*
* Return non-zero if path 'name' has a leading symlink component
*/
int has_symlink_leading_path(const char *name, int len)
{
- return lstat_cache(name, len,
- FL_SYMLINK|FL_DIR, USE_ONLY_LSTAT) &
- FL_SYMLINK;
+ return threaded_has_symlink_leading_path(&default_cache, name, len);
}
/*
@@ -227,7 +203,8 @@ int has_symlink_leading_path(const char *name, int len)
*/
int has_symlink_or_noent_leading_path(const char *name, int len)
{
- return lstat_cache(name, 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);
}
@@ -241,7 +218,8 @@ int has_symlink_or_noent_leading_path(const char *name, int len)
*/
int has_dirs_only_path(const char *name, int len, int prefix_len)
{
- return lstat_cache(name, len,
+ struct cache_def *cache = &default_cache; /* FIXME */
+ return lstat_cache(cache, name, len,
FL_DIR|FL_FULLPATH, prefix_len) &
FL_DIR;
}
@@ -263,7 +241,6 @@ static void do_remove_scheduled_dirs(int new_len)
removal.path[removal.len] != '/');
}
removal.len = new_len;
- return;
}
void schedule_dir_for_removal(const char *name, int len)
@@ -296,11 +273,9 @@ void schedule_dir_for_removal(const char *name, int len)
last_slash - match_len);
removal.len = last_slash;
}
- return;
}
void remove_scheduled_dirs(void)
{
do_remove_scheduled_dirs(0);
- return;
}
generated by cgit v1.2.1 (git 2.18.0) at 2024-09-24 01:18:58 +0000