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-rw-r--r--symlinks.c94
1 files changed, 57 insertions, 37 deletions
diff --git a/symlinks.c b/symlinks.c
index 034943bda0..5261e8cf49 100644
--- a/symlinks.c
+++ b/symlinks.c
@@ -1,5 +1,8 @@
#include "cache.h"
+static int threaded_check_leading_path(struct cache_def *cache, const char *name, int len);
+static int threaded_has_dirs_only_path(struct cache_def *cache, const char *name, int len, int prefix_len);
+
/*
* Returns the length (on a path component basis) of the longest
* common prefix match of 'name_a' and 'name_b'.
@@ -32,12 +35,11 @@ static int longest_path_match(const char *name_a, int len_a,
return match_len;
}
-static struct cache_def default_cache;
+static struct cache_def default_cache = CACHE_DEF_INIT;
static inline void reset_lstat_cache(struct cache_def *cache)
{
- cache->path[0] = '\0';
- cache->len = 0;
+ strbuf_reset(&cache->path);
cache->flags = 0;
/*
* The track_flags and prefix_len_stat_func members is only
@@ -70,7 +72,7 @@ static int lstat_cache_matchlen(struct cache_def *cache,
int prefix_len_stat_func)
{
int match_len, last_slash, last_slash_dir, previous_slash;
- int save_flags, max_len, ret;
+ int save_flags, ret;
struct stat st;
if (cache->track_flags != track_flags ||
@@ -90,14 +92,14 @@ static int lstat_cache_matchlen(struct cache_def *cache,
* the 2 "excluding" path types.
*/
match_len = last_slash =
- longest_path_match(name, len, cache->path, cache->len,
- &previous_slash);
+ longest_path_match(name, len, cache->path.buf,
+ cache->path.len, &previous_slash);
*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 (*ret_flags && match_len == cache->len)
+ if (*ret_flags && match_len == cache->path.len)
return match_len;
/*
* If we now have match_len > 0, we would know that
@@ -118,21 +120,22 @@ static int lstat_cache_matchlen(struct cache_def *cache,
*/
*ret_flags = FL_DIR;
last_slash_dir = last_slash;
- max_len = len < PATH_MAX ? len : PATH_MAX;
- while (match_len < max_len) {
+ if (len > cache->path.len)
+ strbuf_grow(&cache->path, len - cache->path.len);
+ while (match_len < len) {
do {
- cache->path[match_len] = name[match_len];
+ cache->path.buf[match_len] = name[match_len];
match_len++;
- } while (match_len < max_len && name[match_len] != '/');
- if (match_len >= max_len && !(track_flags & FL_FULLPATH))
+ } while (match_len < len && name[match_len] != '/');
+ if (match_len >= len && !(track_flags & FL_FULLPATH))
break;
last_slash = match_len;
- cache->path[last_slash] = '\0';
+ cache->path.buf[last_slash] = '\0';
if (last_slash <= prefix_len_stat_func)
- ret = stat(cache->path, &st);
+ ret = stat(cache->path.buf, &st);
else
- ret = lstat(cache->path, &st);
+ ret = lstat(cache->path.buf, &st);
if (ret) {
*ret_flags = FL_LSTATERR;
@@ -155,12 +158,11 @@ static int lstat_cache_matchlen(struct cache_def *cache,
* for the moment!
*/
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;
+ if (save_flags && last_slash > 0) {
+ cache->path.buf[last_slash] = '\0';
+ cache->path.len = last_slash;
cache->flags = save_flags;
- } else if ((track_flags & FL_DIR) &&
- last_slash_dir > 0 && last_slash_dir <= PATH_MAX) {
+ } else if ((track_flags & FL_DIR) && last_slash_dir > 0) {
/*
* We have a separate test for the directory case,
* since it could be that we have found a symlink or a
@@ -172,8 +174,8 @@ static int lstat_cache_matchlen(struct cache_def *cache,
* 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->path.buf[last_slash_dir] = '\0';
+ cache->path.len = last_slash_dir;
cache->flags = FL_DIR;
} else {
reset_lstat_cache(cache);
@@ -219,7 +221,20 @@ int has_symlink_leading_path(const char *name, int len)
*/
int check_leading_path(const char *name, int len)
{
- struct cache_def *cache = &default_cache; /* FIXME */
+ 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.
+ */
+static 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);
@@ -240,27 +255,35 @@ int check_leading_path(const char *name, int 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.
+ */
+static 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;
}
-static struct removal_def {
- char path[PATH_MAX];
- int len;
-} removal;
+static struct strbuf removal = STRBUF_INIT;
static void do_remove_scheduled_dirs(int new_len)
{
while (removal.len > new_len) {
- removal.path[removal.len] = '\0';
- if (rmdir(removal.path))
+ removal.buf[removal.len] = '\0';
+ if (rmdir(removal.buf))
break;
do {
removal.len--;
} while (removal.len > new_len &&
- removal.path[removal.len] != '/');
+ removal.buf[removal.len] != '/');
}
removal.len = new_len;
}
@@ -270,7 +293,7 @@ void schedule_dir_for_removal(const char *name, int len)
int match_len, last_slash, i, previous_slash;
match_len = last_slash = i =
- longest_path_match(name, len, removal.path, removal.len,
+ longest_path_match(name, len, removal.buf, removal.len,
&previous_slash);
/* Find last slash inside 'name' */
while (i < len) {
@@ -290,11 +313,8 @@ void schedule_dir_for_removal(const char *name, int len)
* If we go deeper down the directory tree, we only need to
* save the new path components as we go down.
*/
- if (match_len < last_slash) {
- memcpy(&removal.path[match_len], &name[match_len],
- last_slash - match_len);
- removal.len = last_slash;
- }
+ if (match_len < last_slash)
+ strbuf_add(&removal, &name[match_len], last_slash - match_len);
}
void remove_scheduled_dirs(void)
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-02 10:22:46 +0000