| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2001 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * NAME |
| * kill05.c |
| * |
| * DESCRIPTION |
| * Test case to check that kill() fails when passed a pid owned by another |
| * user. |
| * |
| * ALGORITHM |
| * call setup |
| * loop if the -i option was given |
| * setup a shared memory segment to for a flag which will notify |
| * ltpuser1's process that life is not worth living in a continuous loop. |
| * fork a child and set the euid to ltpuser1 |
| * set the parents euid to ltpuser2 |
| * execute the kill system call on ltpuser1's pid |
| * check the return value |
| * if return value is not -1 |
| * issue a FAIL message, break remaining tests and cleanup |
| * if we are doing functional testing |
| * if the errno was set to 1 (Operation not permitted) |
| * issue a PASS message |
| * otherwise |
| * issue a FAIL message |
| * call cleanup |
| * |
| * USAGE |
| * kill05 [-c n] [-e] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| * HISTORY |
| * 07/2001 Ported by Wayne Boyer |
| * |
| * 26/02/2008 Renaud Lottiaux (Renaud.Lottiaux@kerlabs.com) |
| * - Fix wrong return value check on shmat system call (leading to |
| * segfault in case of error with this syscall). |
| * - Fix deletion of IPC memory segment. Segment was not correctly |
| * deleted due to the change of uid during the test. |
| * |
| * RESTRICTIONS |
| * This test must be run as root. |
| * Looping with the -i option does not work correctly. |
| */ |
| |
| #include <sys/types.h> |
| #include <sys/ipc.h> |
| #include <sys/shm.h> |
| #include <sys/wait.h> |
| #include <errno.h> |
| #include <pwd.h> |
| #include <signal.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| extern void rm_shm(int); |
| |
| void cleanup(void); |
| void setup(void); |
| void do_child(void); |
| void do_master_child(char **av); |
| |
| char *TCID = "kill05"; |
| int TST_TOTAL = 1; |
| int shmid1 = -1; |
| extern key_t semkey; |
| int *flag; |
| |
| extern int getipckey(); |
| |
| #define TEST_SIG SIGKILL |
| |
| int main(int ac, char **av) |
| { |
| const char *msg; |
| pid_t pid; |
| int status; |
| |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| #ifdef UCLINUX |
| maybe_run_child(&do_child, ""); |
| #endif |
| |
| setup(); /* global setup */ |
| |
| pid = FORK_OR_VFORK(); |
| if (pid == -1) |
| tst_brkm(TBROK, cleanup, "Fork failed"); |
| else if (pid == 0) |
| do_master_child(av); |
| |
| if (waitpid(pid, &status, 0) == -1) |
| tst_resm(TBROK | TERRNO, "waitpid failed"); |
| else if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) |
| tst_resm(TFAIL, "child exited abnormally"); |
| else |
| tst_resm(TPASS, "received expected errno(EPERM)"); |
| cleanup(); |
| tst_exit(); |
| } |
| |
| void wait_for_flag(int value) |
| { |
| while (1) { |
| if (*flag == value) |
| break; |
| else |
| sleep(1); |
| } |
| } |
| |
| /* |
| * do_master_child() |
| */ |
| void do_master_child(char **av) |
| { |
| pid_t pid1; |
| int status; |
| |
| char user1name[] = "nobody"; |
| char user2name[] = "bin"; |
| |
| struct passwd *ltpuser1, *ltpuser2; |
| |
| tst_count = 0; |
| |
| *flag = 0; |
| |
| pid1 = FORK_OR_VFORK(); |
| |
| if (pid1 == -1) |
| tst_brkm(TBROK | TERRNO, cleanup, "Fork failed"); |
| |
| if (pid1 == 0) { |
| ltpuser1 = SAFE_GETPWNAM(NULL, user1name); |
| if (setreuid(ltpuser1->pw_uid, ltpuser1->pw_uid) == -1) { |
| perror("setreuid failed (in child)"); |
| exit(1); |
| } |
| *flag = 1; |
| #ifdef UCLINUX |
| if (self_exec(av[0], "") < 0) { |
| perror("self_exec failed"); |
| exit(1); |
| } |
| #else |
| do_child(); |
| #endif |
| } |
| ltpuser2 = SAFE_GETPWNAM(NULL, user2name); |
| if (setreuid(ltpuser2->pw_uid, ltpuser2->pw_uid) == -1) { |
| perror("seteuid failed"); |
| exit(1); |
| } |
| |
| /* wait until child sets its euid */ |
| wait_for_flag(1); |
| |
| TEST(kill(pid1, TEST_SIG)); |
| |
| /* signal the child that we're done */ |
| *flag = 2; |
| |
| if (waitpid(pid1, &status, 0) == -1) { |
| perror("waitpid failed"); |
| exit(1); |
| } |
| |
| if (TEST_RETURN != -1) { |
| printf("kill succeeded unexpectedly\n"); |
| exit(1); |
| } |
| |
| /* |
| * Check to see if the errno was set to the expected |
| * value of 1 : EPERM |
| */ |
| if (TEST_ERRNO == EPERM) { |
| printf("kill failed with EPERM\n"); |
| exit(0); |
| } |
| perror("kill failed unexpectedly"); |
| exit(1); |
| } |
| |
| void do_child(void) |
| { |
| wait_for_flag(2); |
| exit(0); |
| } |
| |
| void setup(void) |
| { |
| tst_require_root(NULL); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| semkey = getipckey(); |
| |
| if ((shmid1 = shmget(semkey, getpagesize(), 0666 | IPC_CREAT)) == -1) |
| tst_brkm(TBROK, cleanup, "Failed to setup shared memory"); |
| |
| if ((flag = shmat(shmid1, 0, 0)) == (int *)-1) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "Failed to attach shared memory:%d", shmid1); |
| } |
| |
| void cleanup(void) |
| { |
| rm_shm(shmid1); |
| |
| tst_rmdir(); |
| } |