1 files changed, 126 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_setuid.c b/src/regress/lib/libc/sys/t_setuid.c
new file mode 100644
index 0000000000..7d3bd1986b
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_setuid.c
@@ -0,0 +1,126 @@
+/*      $OpenBSD: t_setuid.c,v 1.1.1.1 2019/11/19 19:57:04 bluhm Exp $  */
+/* $NetBSD: t_setuid.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $ */
+
+/*-
+ * Copyright (c) 2011 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jukka Ruohonen.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "macros.h"
+
+#include <sys/cdefs.h>
+__RCSID("$NetBSD: t_setuid.c,v 1.1 2011/07/07 06:57:54 jruoho Exp $");
+
+#include <sys/wait.h>
+
+#include "atf-c.h"
+#include <errno.h>
+#include <pwd.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+ATF_TC(setuid_perm);
+ATF_TC_HEAD(setuid_perm, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test setuid(0) as normal user");
+        atf_tc_set_md_var(tc, "require.user", "unprivileged");
+}
+
+ATF_TC_BODY(setuid_perm, tc)
+{
+        errno = 0;
+
+        ATF_REQUIRE(setuid(0) == -1);
+        ATF_REQUIRE(errno == EPERM);
+}
+
+ATF_TC(setuid_real);
+ATF_TC_HEAD(setuid_real, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test setuid(2) with real UID");
+}
+
+ATF_TC_BODY(setuid_real, tc)
+{
+        uid_t uid = getuid();
+
+        ATF_REQUIRE(setuid(uid) == 0);
+
+        ATF_REQUIRE(getuid() == uid);
+        ATF_REQUIRE(geteuid() == uid);
+}
+
+ATF_TC(setuid_root);
+ATF_TC_HEAD(setuid_root, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "A basic test of setuid(2)");
+        atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(setuid_root, tc)
+{
+        struct passwd *pw;
+        int rv, sta;
+        pid_t pid;
+        uid_t uid;
+
+        while ((pw = getpwent()) != NULL) {
+
+                pid = fork();
+                ATF_REQUIRE(pid >= 0);
+
+                if (pid == 0) {
+
+                        rv = setuid(pw->pw_uid);
+
+                        if (rv != 0)
+                                _exit(EXIT_FAILURE);
+
+                        uid = getuid();
+
+                        if (uid != pw->pw_uid)
+                                _exit(EXIT_FAILURE);
+
+                        _exit(EXIT_SUCCESS);
+                }
+
+                (void)wait(&sta);
+
+                if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
+                        atf_tc_fail("failed to change UID to %u", pw->pw_uid);
+        }
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+        ATF_TP_ADD_TC(tp, setuid_perm);
+        ATF_TP_ADD_TC(tp, setuid_real);
+        ATF_TP_ADD_TC(tp, setuid_root);
+
+        return atf_no_error();
+}