acl-util: fix memleak

[elogind.git] / src / shared / acl-util.c

diff --git a/src/shared/acl-util.c b/src/shared/acl-util.c
index 27225e3fe775247cc139676a7e36483b2e079e84..b99ecbba5bc0f41a62747287c33b75d49d989908 100644 (file)
--- a/src/shared/acl-util.c
+++ b/src/shared/acl-util.c
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-

 /***
   This file is part of systemd.
 
 /***
   This file is part of systemd.
 


@@ -165,7 +163,7 @@ int add_base_acls_if_needed(acl_t *acl_p, const char *path) {
 
 int acl_search_groups(const char *path, char ***ret_groups) {
         _cleanup_strv_free_ char **g = NULL;
 
 int acl_search_groups(const char *path, char ***ret_groups) {
         _cleanup_strv_free_ char **g = NULL;

-        _cleanup_(acl_free) acl_t acl = NULL;
+        _cleanup_(acl_freep) acl_t acl = NULL;

         bool ret = false;
         acl_entry_t entry;
         int r;
         bool ret = false;
         acl_entry_t entry;
         int r;


@@ -399,4 +397,35 @@ int acls_for_file(const char *path, acl_type_t type, acl_t new, acl_t *acl) {
         old = NULL;
         return 0;
 }
         old = NULL;
         return 0;
 }

+
+int add_acls_for_user(int fd, uid_t uid) {
+        _cleanup_(acl_freep) acl_t acl = NULL;
+        acl_entry_t entry;
+        acl_permset_t permset;
+        int r;
+
+        acl = acl_get_fd(fd);
+        if (!acl)
+                return -errno;
+
+        r = acl_find_uid(acl, uid, &entry);
+        if (r <= 0) {
+                if (acl_create_entry(&acl, &entry) < 0 ||
+                    acl_set_tag_type(entry, ACL_USER) < 0 ||
+                    acl_set_qualifier(entry, &uid) < 0)
+                        return -errno;
+        }
+
+        /* We do not recalculate the mask unconditionally here,
+         * so that the fchmod() mask above stays intact. */
+        if (acl_get_permset(entry, &permset) < 0 ||
+            acl_add_perm(permset, ACL_READ) < 0)
+                return -errno;
+
+        r = calc_acl_mask_if_needed(&acl);
+        if (r < 0)
+                return r;
+
+        return acl_set_fd(fd, acl);
+}

 #endif // 0
 #endif // 0