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-rw-r--r--lib/util/util_id.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/lib/util/util_id.c b/lib/util/util_id.c
new file mode 100644
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+++ b/lib/util/util_id.c
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+/*
+ Unix SMB/CIFS implementation.
+
+ Helper routines for uid and gid arrays
+
+ Copyright (C) Guenther Deschner 2009
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+/****************************************************************************
+ Add a gid to an array of gids if it's not already there.
+****************************************************************************/
+
+bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
+ gid_t **gids, size_t *num_gids)
+{
+ int i;
+
+ if ((*num_gids != 0) && (*gids == NULL)) {
+ /*
+ * A former call to this routine has failed to allocate memory
+ */
+ return false;
+ }
+
+ for (i=0; i<*num_gids; i++) {
+ if ((*gids)[i] == gid) {
+ return true;
+ }
+ }
+
+ *gids = talloc_realloc(mem_ctx, *gids, gid_t, *num_gids+1);
+ if (*gids == NULL) {
+ *num_gids = 0;
+ return false;
+ }
+
+ (*gids)[*num_gids] = gid;
+ *num_gids += 1;
+ return true;
+}
+
+/****************************************************************************
+ Add a uid to an array of uids if it's not already there.
+****************************************************************************/
+
+bool add_uid_to_array_unique(TALLOC_CTX *mem_ctx, uid_t uid,
+ uid_t **uids, size_t *num_uids)
+{
+ int i;
+
+ if ((*num_uids != 0) && (*uids == NULL)) {
+ /*
+ * A former call to this routine has failed to allocate memory
+ */
+ return false;
+ }
+
+ for (i=0; i<*num_uids; i++) {
+ if ((*uids)[i] == uid) {
+ return true;
+ }
+ }
+
+ *uids = talloc_realloc(mem_ctx, *uids, uid_t, *num_uids+1);
+ if (*uids == NULL) {
+ *num_uids = 0;
+ return false;
+ }
+
+ (*uids)[*num_uids] = uid;
+ *num_uids += 1;
+ return true;
+}