1 files changed, 87 insertions, 0 deletions
diff --git a/lib/util/gidlist.c b/lib/util/gidlist.c
new file mode 100644
index 0000000..efcb7df
--- /dev/null
+++ b/lib/util/gidlist.c
@@ -0,0 +1,87 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * 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 <stdlib.h>
+#include <grp.h>
+
+#include <sudo_compat.h>
+#include <sudo_debug.h>
+#include <sudo_fatal.h>
+#include <sudo_gettext.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, (size_t)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_strtoidx(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);
+}