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[src/trunk]: src Few fundamental consistency checks for kill(2).
details: https://anonhg.NetBSD.org/src/rev/c025e116d1ac
branches: trunk
changeset: 764670:c025e116d1ac
user: jruoho <jruoho%NetBSD.org@localhost>
date: Sat Apr 30 06:20:37 2011 +0000
description:
Few fundamental consistency checks for kill(2).
diffstat:
distrib/sets/lists/tests/mi | 4 +-
tests/syscall/Makefile | 4 +-
tests/syscall/t_kill.c | 312 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 317 insertions(+), 3 deletions(-)
diffs (truncated from 359 to 300 lines):
diff -r d39f1ecb90f6 -r c025e116d1ac distrib/sets/lists/tests/mi
--- a/distrib/sets/lists/tests/mi Sat Apr 30 01:44:36 2011 +0000
+++ b/distrib/sets/lists/tests/mi Sat Apr 30 06:20:37 2011 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: mi,v 1.312 2011/04/30 00:35:03 alnsn Exp $
+# $NetBSD: mi,v 1.313 2011/04/30 06:20:37 jruoho Exp $
#
# Note: don't delete entries from here - mark them as "obsolete" instead.
#
@@ -599,6 +599,7 @@
./usr/libdata/debug/usr/tests/syscall/t_getpid.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_getrusage.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_getsid.debug tests-syscall-debug debug,atf
+./usr/libdata/debug/usr/tests/syscall/t_kill.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_mmap.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_mprotect.debug tests-syscall-debug debug,atf
./usr/libdata/debug/usr/tests/syscall/t_msync.debug tests-syscall-debug debug,atf
@@ -2272,6 +2273,7 @@
./usr/tests/syscall/t_getpid tests-syscall-tests atf
./usr/tests/syscall/t_getrusage tests-syscall-tests atf
./usr/tests/syscall/t_getsid tests-syscall-tests atf
+./usr/tests/syscall/t_kill tests-syscall-tests atf
./usr/tests/syscall/t_mmap tests-syscall-tests atf
./usr/tests/syscall/t_mprotect tests-syscall-tests atf
./usr/tests/syscall/t_msync tests-syscall-tests atf
diff -r d39f1ecb90f6 -r c025e116d1ac tests/syscall/Makefile
--- a/tests/syscall/Makefile Sat Apr 30 01:44:36 2011 +0000
+++ b/tests/syscall/Makefile Sat Apr 30 06:20:37 2011 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.22 2011/04/17 06:26:02 jruoho Exp $
+# $NetBSD: Makefile,v 1.23 2011/04/30 06:20:37 jruoho Exp $
.include <bsd.own.mk>
@@ -6,7 +6,7 @@
TESTS_C+= t_access t_cmsg t_dup t_fsync
TESTS_C+= t_getgroups t_getpid t_getrusage t_getsid
-TESTS_C+= t_mmap t_mprotect t_msync
+TESTS_C+= t_kill t_mmap t_mprotect t_msync
TESTS_C+= t_setrlimit t_setuid t_timer t_umask
LDADD.t_getpid+= -lpthread
diff -r d39f1ecb90f6 -r c025e116d1ac tests/syscall/t_kill.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/syscall/t_kill.c Sat Apr 30 06:20:37 2011 +0000
@@ -0,0 +1,312 @@
+/* $NetBSD: t_kill.c,v 1.1 2011/04/30 06:20:37 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 <sys/cdefs.h>
+__RCSID("$NetBSD: t_kill.c,v 1.1 2011/04/30 06:20:37 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");
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