/* $NetBSD: t_kill.c,v 1.1.44.1 2024/08/07 10:11:45 martin 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 __RCSID("$NetBSD: t_kill.c,v 1.1.44.1 2024/08/07 10:11:45 martin Exp $"); #include #include #include #include #include #include #include #include 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_TC(kill_int_min); ATF_TC_HEAD(kill_int_min, tc) { atf_tc_set_md_var(tc, "descr", "Test kill(INT_MIN) fails with ESRCH"); } ATF_TC_BODY(kill_int_min, tc) { ATF_CHECK_ERRNO(ESRCH, kill(INT_MIN, 0)); } 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); ATF_TP_ADD_TC(tp, kill_int_min); return atf_no_error(); }