1 files changed, 91 insertions, 0 deletions
diff --git a/lib/util/regress/getgrouplist/getgids.c b/lib/util/regress/getgrouplist/getgids.c
new file mode 100644
index 0000000..f366f83
--- /dev/null
+++ b/lib/util/regress/getgrouplist/getgids.c
@@ -0,0 +1,91 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2021 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.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_STDBOOL_H
+# include <stdbool.h>
+#else
+# include "compat/stdbool.h"
+#endif
+#include <unistd.h>
+#include <pwd.h>
+#include <grp.h>
+
+#define SUDO_ERROR_WRAP 0
+
+#include "sudo_compat.h"
+#include "sudo_fatal.h"
+#include "sudo_util.h"
+
+sudo_dso_public int main(int argc, char *argv[]);
+
+/*
+ * Implement "id -G" using sudo_getgrouplist2().
+ */
+
+int
+main(int argc, char *argv[])
+{
+    char *username = NULL;
+    GETGROUPS_T *groups = NULL;
+    struct passwd *pw;
+    int ch, i, ngroups;
+    gid_t basegid;
+
+    initprogname(argc > 0 ? argv[0] : "getgids");
+
+    while ((ch = getopt(argc, argv, "v")) != -1) {
+	switch (ch) {
+	case 'v':
+	    /* ignore */
+	    break;
+	default:
+	    fprintf(stderr, "usage: %s [-v] [user]\n", getprogname());
+	    return EXIT_FAILURE;
+	}
+    }
+    argc -= optind;
+    argv += optind;
+
+    if (argc > 0)
+	username = argv[0];
+
+    if (username != NULL) {
+	if ((pw = getpwnam(username)) == NULL)
+	    sudo_fatalx("unknown user name %s", username);
+    } else {
+	if ((pw = getpwuid(getuid())) == NULL)
+	    sudo_fatalx("unknown user ID %u", (unsigned int)getuid());
+    }
+    basegid = pw->pw_gid;
+    if ((username = strdup(pw->pw_name)) == NULL)
+	sudo_fatal(NULL);
+
+    if (sudo_getgrouplist2(username, basegid, &groups, &ngroups) == -1)
+	sudo_fatal("sudo_getgroulist2");
+
+    for (i = 0; i < ngroups; i++) {
+	printf("%s%u", i ? " " : "", (unsigned int)groups[i]);
+    }
+    putchar('\n');
+    return EXIT_SUCCESS;
+}