1 files changed, 316 insertions, 0 deletions

diff --git a/src/regress/lib/libc/sys/t_kill.c b/src/regress/lib/libc/sys/t_kill.c
new file mode 100644
index 0000000000..c92bbdd18b
--- /dev/null
+++ b/src/regress/lib/libc/sys/t_kill.c
@@ -0,0 +1,316 @@
+/*      $OpenBSD: t_kill.c,v 1.1.1.1 2019/11/19 19:57:03 bluhm Exp $    */
+/* $NetBSD: t_kill.c,v 1.1 2011/07/07 06:57:53 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_kill.c,v 1.1 2011/07/07 06:57:53 jruoho Exp $");
+
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <limits.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "atf-c.h"
+
+ATF_TC(kill_basic);
+ATF_TC_HEAD(kill_basic, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test that kill(2) works");
+}
+
+ATF_TC_BODY(kill_basic, tc)
+{
+        const int sig[] = { SIGHUP, SIGINT, SIGKILL, SIGTERM };
+        pid_t pid;
+        size_t i;
+        int sta;
+
+        for (i = 0; i < __arraycount(sig); i++) {
+
+                pid = fork();
+                ATF_REQUIRE(pid >= 0);
+
+                switch (pid) {
+
+                case 0:
+                        pause();
+                        break;
+
+                default:
+                        ATF_REQUIRE(kill(pid, sig[i]) == 0);
+                }
+
+                (void)wait(&sta);
+
+                if (WIFSIGNALED(sta) == 0 || WTERMSIG(sta) != sig[i])
+                        atf_tc_fail("kill(2) failed to kill child");
+        }
+}
+
+ATF_TC(kill_err);
+ATF_TC_HEAD(kill_err, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test error conditions of kill(2)");
+}
+
+ATF_TC_BODY(kill_err, tc)
+{
+        int rv, sta;
+        pid_t pid;
+
+        pid = fork();
+        ATF_REQUIRE(pid >= 0);
+
+        if (pid == 0) {
+
+                errno = 0;
+                rv = kill(getpid(), -1);
+
+                if (rv == 0 || errno != EINVAL)
+                        _exit(EINVAL);
+
+                errno = 0;
+                rv = kill(INT_MAX, SIGUSR1);
+
+                if (rv == 0 || errno != ESRCH)
+                        _exit(ESRCH);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)wait(&sta);
+
+        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS) {
+
+                if (WEXITSTATUS(sta) == EINVAL)
+                        atf_tc_fail("expected EINVAL, but kill(2) succeeded");
+
+                if (WEXITSTATUS(sta) == ESRCH)
+                        atf_tc_fail("expected ESRCH, but kill(2) succeeded");
+
+                atf_tc_fail("unknown error from kill(2)");
+        }
+}
+
+ATF_TC(kill_perm);
+ATF_TC_HEAD(kill_perm, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test kill(2) permissions");
+        atf_tc_set_md_var(tc, "require.user", "root");
+}
+
+ATF_TC_BODY(kill_perm, tc)
+{
+        struct passwd *pw;
+        pid_t cpid, ppid;
+        uid_t cuid = 0;
+        uid_t puid = 0;
+        int sta;
+
+        /*
+         * Test that kill(2) fails when called
+         * for a PID owned by another user.
+         */
+        pw = getpwnam("operator");
+
+        if (pw != NULL)
+                cuid = pw->pw_uid;
+
+        pw = getpwnam("nobody");
+
+        if (pw != NULL)
+                puid = pw->pw_uid;
+
+        if (cuid == 0 || puid == 0 || cuid == puid)
+                atf_tc_fail("getpwnam(3) failed");
+
+        ppid = fork();
+
+        if (ppid < 0)
+                _exit(EXIT_FAILURE);
+
+        if (ppid == 0) {
+
+                cpid = fork();
+
+                if (cpid < 0)
+                        _exit(EXIT_FAILURE);
+
+                if (cpid == 0) {
+
+                        if (setuid(cuid) < 0)
+                                _exit(EXIT_FAILURE);
+                        else {
+                                (void)sleep(1);
+                        }
+
+                        _exit(EXIT_SUCCESS);
+                }
+
+                /*
+                 * Try to kill the child after having
+                 * set the real and effective UID.
+                 */
+                if (setuid(puid) != 0)
+                        _exit(EXIT_FAILURE);
+
+                errno = 0;
+
+                if (kill(cpid, SIGKILL) == 0)
+                        _exit(EPERM);
+
+                if (errno != EPERM)
+                        _exit(EPERM);
+
+                (void)waitpid(cpid, &sta, 0);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)waitpid(ppid, &sta, 0);
+
+        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) == EPERM)
+                atf_tc_fail("killed a process of another user");
+
+        if (WIFEXITED(sta) == 0 || WEXITSTATUS(sta) != EXIT_SUCCESS)
+                atf_tc_fail("unknown error from kill(2)");
+}
+
+ATF_TC(kill_pgrp_neg);
+ATF_TC_HEAD(kill_pgrp_neg, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test kill(2) with process group, #2");
+}
+
+ATF_TC_BODY(kill_pgrp_neg, tc)
+{
+        const int maxiter = 3;
+        pid_t cpid, ppid;
+        int i, sta;
+
+        ppid = fork();
+        ATF_REQUIRE(ppid >= 0);
+
+        if (ppid == 0) {
+
+                ATF_REQUIRE(setpgid(0, 0) == 0);
+
+                for (i = 0; i < maxiter; i++) {
+
+                        cpid = fork();
+                        ATF_REQUIRE(cpid >= 0);
+
+                        if (cpid == 0)
+                                pause();
+                }
+
+                /*
+                 * Test the variant of killpg(3); if the process number
+                 * is negative but not -1, the signal should be sent to
+                 * all processes whose process group ID is equal to the
+                 * absolute value of the process number.
+                 */
+                ATF_REQUIRE(kill(-getpgrp(), SIGKILL) == 0);
+
+                (void)sleep(1);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)waitpid(ppid, &sta, 0);
+
+        if (WIFSIGNALED(sta) == 0 || WTERMSIG(sta) != SIGKILL)
+                atf_tc_fail("failed to kill(2) a process group");
+}
+
+ATF_TC(kill_pgrp_zero);
+ATF_TC_HEAD(kill_pgrp_zero, tc)
+{
+        atf_tc_set_md_var(tc, "descr", "Test kill(2) with process group, #1");
+}
+
+ATF_TC_BODY(kill_pgrp_zero, tc)
+{
+        const int maxiter = 3;
+        pid_t cpid, ppid;
+        int i, sta;
+
+        ppid = fork();
+        ATF_REQUIRE(ppid >= 0);
+
+        if (ppid == 0) {
+
+                ATF_REQUIRE(setpgid(0, 0) == 0);
+
+                for (i = 0; i < maxiter; i++) {
+
+                        cpid = fork();
+                        ATF_REQUIRE(cpid >= 0);
+
+                        if (cpid == 0)
+                                pause();
+                }
+
+                /*
+                 * If the supplied process number is zero,
+                 * the signal should be sent to all processes
+                 * under the current process group.
+                 */
+                ATF_REQUIRE(kill(0, SIGKILL) == 0);
+
+                (void)sleep(1);
+
+                _exit(EXIT_SUCCESS);
+        }
+
+        (void)waitpid(ppid, &sta, 0);
+
+        if (WIFSIGNALED(sta) == 0 || WTERMSIG(sta) != SIGKILL)
+                atf_tc_fail("failed to kill(2) a process group");
+}
+
+ATF_TP_ADD_TCS(tp)
+{
+
+        ATF_TP_ADD_TC(tp, kill_basic);
+        ATF_TP_ADD_TC(tp, kill_err);
+        ATF_TP_ADD_TC(tp, kill_perm);
+        ATF_TP_ADD_TC(tp, kill_pgrp_neg);
+        ATF_TP_ADD_TC(tp, kill_pgrp_zero);
+
+        return atf_no_error();
+}