Merge pull request #34638 from YHNdnzj/laccess-error-check

various: correct laccess() error check

src/basic/cgroup-util.c

@@ -623,7 +623,7 @@ static int controller_is_v1_accessible(const char *root, const char *controller)
          * - we can modify the hierarchy. */
 
         cpath = strjoina("/sys/fs/cgroup/", dn, root, root ? "/cgroup.procs" : NULL);
-        return laccess(cpath, root ? W_OK : F_OK);
+        return access_nofollow(cpath, root ? W_OK : F_OK);
 }
 
 int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **ret) {

src/basic/fs-util.h

@@ -49,7 +49,7 @@ int futimens_opath(int fd, const struct timespec ts[2]);
 int fd_warn_permissions(const char *path, int fd);
 int stat_warn_permissions(const char *path, const struct stat *st);
 
-#define laccess(path, mode)                                             \
+#define access_nofollow(path, mode)                                             \
         RET_NERRNO(faccessat(AT_FDCWD, (path), (mode), AT_SYMLINK_NOFOLLOW))
 
 int touch_file(const char *path, bool parents, usec_t stamp, uid_t uid, gid_t gid, mode_t mode);

src/basic/os-util.c

@@ -97,8 +97,9 @@ int path_is_extension_tree(ImageClass image_class, const char *path, const char
         /* Does the path exist at all? If not, generate an error immediately. This is useful so that a missing root dir
          * always results in -ENOENT, and we can properly distinguish the case where the whole root doesn't exist from
          * the case where just the os-release file is missing. */
-        if (laccess(path, F_OK) < 0)
-                return -errno;
+        r = access_nofollow(path, F_OK);
+        if (r < 0)
+                return r;
 
         /* We use /usr/lib/extension-release.d/extension-release[.NAME] as flag for something being a system extension,
          * /etc/extension-release.d/extension-release[.NAME] as flag for something being a system configuration, and finally,

src/basic/path-lookup.c

@@ -904,6 +904,7 @@ char **env_generator_binary_paths(RuntimeScope runtime_scope) {
 
 int find_portable_profile(const char *name, const char *unit, char **ret_path) {
         const char *dot;
+        int r;
 
         assert(name);
         assert(ret_path);
@@ -917,13 +918,13 @@ int find_portable_profile(const char *name, const char *unit, char **ret_path) {
                 if (!joined)
                         return -ENOMEM;
 
-                if (laccess(joined, F_OK) >= 0) {
+                r = access_nofollow(joined, F_OK);
+                if (r >= 0) {
                         *ret_path = TAKE_PTR(joined);
                         return 0;
                 }
-
-                if (errno != ENOENT)
-                        return -errno;
+                if (r != -ENOENT)
+                        return r;
         }
 
         return -ENOENT;