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-rw-r--r--lib/util/gidlist.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/util/gidlist.c b/lib/util/gidlist.c
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+++ b/lib/util/gidlist.c
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+/*
+ * Copyright (c) 2013-2015 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 <sys/types.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <grp.h>
+
+#define DEFAULT_TEXT_DOMAIN "sudo"
+#include "sudo_gettext.h" /* must be included before sudo_compat.h */
+
+#include "sudo_compat.h"
+#include "sudo_fatal.h"
+#include "sudo_debug.h"
+#include "sudo_util.h"
+
+/*
+ * Parse a comma-separated list of gids into an allocated array of GETGROUPS_T.
+ * If a pointer to the base gid is specified, it is stored as the first element
+ * in the array.
+ * Returns the number of gids in the allocated array.
+ */
+int
+sudo_parse_gids_v1(const char *gidstr, const gid_t *basegid, GETGROUPS_T **gidsp)
+{
+ int ngids = 0;
+ GETGROUPS_T *gids;
+ const char *cp = gidstr;
+ const char *errstr;
+ char *ep;
+ debug_decl(sudo_parse_gids, SUDO_DEBUG_UTIL)
+
+ /* Count groups. */
+ if (*cp != '\0') {
+ ngids++;
+ do {
+ if (*cp++ == ',')
+ ngids++;
+ } while (*cp != '\0');
+ }
+ /* Base gid is optional. */
+ if (basegid != NULL)
+ ngids++;
+ /* Allocate and fill in array. */
+ if (ngids != 0) {
+ gids = reallocarray(NULL, ngids, sizeof(GETGROUPS_T));
+ if (gids == NULL) {
+ sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
+ debug_return_int(-1);
+ }
+ ngids = 0;
+ if (basegid != NULL)
+ gids[ngids++] = *basegid;
+ cp = gidstr;
+ do {
+ gids[ngids] = (GETGROUPS_T) sudo_strtoid(cp, ",", &ep, &errstr);
+ if (errstr != NULL) {
+ sudo_warnx(U_("%s: %s"), cp, U_(errstr));
+ free(gids);
+ debug_return_int(-1);
+ }
+ if (basegid == NULL || gids[ngids] != *basegid)
+ ngids++;
+ cp = ep + 1;
+ } while (*ep != '\0');
+ *gidsp = gids;
+ }
+ debug_return_int(ngids);
+}