1 files changed, 92 insertions, 0 deletions
diff --git a/plugins/sudoers/strlist.c b/plugins/sudoers/strlist.c
new file mode 100644
index 0000000..912ce46
--- /dev/null
+++ b/plugins/sudoers/strlist.c
@@ -0,0 +1,92 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2018 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <sudo_compat.h>
+#include <sudo_queue.h>
+#include <sudo_util.h>
+#include <sudoers_debug.h>
+#include <strlist.h>
+
+struct sudoers_string *
+sudoers_string_alloc(const char *s)
+{
+    struct sudoers_string *cs;
+    debug_decl(sudoers_string_alloc, SUDOERS_DEBUG_UTIL);
+
+    if ((cs = malloc(sizeof(*cs))) != NULL) {
+	if ((cs->str = strdup(s)) == NULL) {
+	    free(cs);
+	    cs = NULL;
+	}
+    }
+
+    debug_return_ptr(cs);
+}
+
+void
+sudoers_string_free(struct sudoers_string *cs)
+{
+    if (cs != NULL) {
+	free(cs->str);
+	free(cs);
+    }
+}
+
+struct sudoers_str_list *
+str_list_alloc(void)
+{
+    struct sudoers_str_list *strlist;
+    debug_decl(str_list_alloc, SUDOERS_DEBUG_UTIL);
+
+    strlist = malloc(sizeof(*strlist));
+    if (strlist != NULL) {
+	STAILQ_INIT(strlist);
+	strlist->refcnt = 1;
+    }
+
+    debug_return_ptr(strlist);
+}
+
+void
+str_list_free(void *v)
+{
+    struct sudoers_str_list *strlist = v;
+    struct sudoers_string *first;
+    debug_decl(str_list_free, SUDOERS_DEBUG_UTIL);
+
+    if (strlist != NULL) {
+	if (--strlist->refcnt == 0) {
+	    while ((first = STAILQ_FIRST(strlist)) != NULL) {
+		STAILQ_REMOVE_HEAD(strlist, entries);
+		sudoers_string_free(first);
+	    }
+	    free(strlist);
+	}
+    }
+    debug_return;
+}