| /* |
| * Copyright (c) International Business Machines Corp., 2001 |
| * Copyright (c) 2012 Cyril Hrubis <chrubis@suse.cz> |
| * |
| * 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 |
| */ |
| |
| /* |
| * Verify that, pause() returns -1 and sets errno to EINTR after receipt of a |
| * signal which is caught by the calling process. Also, verify that the calling |
| * process will resume execution from the point of suspension. |
| */ |
| |
| #include <unistd.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/wait.h> |
| |
| #include "test.h" |
| |
| char *TCID = "pause02"; |
| int TST_TOTAL = 1; |
| static pid_t cpid; |
| |
| static void do_child(void); |
| static void setup(void); |
| static void cleanup(void); |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| int status; |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| #ifdef UCLINUX |
| maybe_run_child(&do_child, ""); |
| #endif |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| |
| cpid = FORK_OR_VFORK(); |
| switch (cpid) { |
| case -1: |
| tst_brkm(TBROK, cleanup, "fork() failed"); |
| break; |
| case 0: |
| #ifdef UCLINUX |
| if (self_exec(av[0], "") < 0) |
| tst_brkm(TBROK, cleanup, "self_exec failed"); |
| #else |
| do_child(); |
| #endif |
| break; |
| default: |
| break; |
| } |
| |
| /* |
| * Wait for child to enter pause(). |
| */ |
| TST_PROCESS_STATE_WAIT(cleanup, cpid, 'S'); |
| |
| /* |
| * Send the SIGINT signal now, so that child |
| * returns from pause and resumes execution. |
| */ |
| kill(cpid, SIGINT); |
| |
| wait(&status); |
| |
| if (WIFEXITED(status)) { |
| if (WEXITSTATUS(status) == 0) |
| tst_resm(TPASS, "pause was interrupted correctly"); |
| else |
| tst_resm(TFAIL, "pause was interrupted but the " |
| "retval and/or errno was wrong"); |
| continue; |
| } |
| |
| if (WIFSIGNALED(status)) { |
| switch (WTERMSIG(status)) { |
| case SIGALRM: |
| tst_resm(TFAIL, "Timeout: SIGINT wasn't recieved by child"); |
| break; |
| default: |
| tst_resm(TFAIL, "Child killed by signal"); |
| } |
| |
| continue; |
| } |
| |
| tst_resm(TFAIL, "Pause was not interrupted"); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void sig_handle(int sig) |
| { |
| } |
| |
| static void do_child(void) |
| { |
| /* avoid LTP framework to do whatever it likes */ |
| signal(SIGALRM, SIG_DFL); |
| |
| if (signal(SIGINT, sig_handle) == SIG_ERR) { |
| fprintf(stderr, "Child: Failed to setup signal handler\n"); |
| exit(1); |
| } |
| |
| /* Commit suicide after 10 seconds */ |
| alarm(10); |
| |
| TEST(pause()); |
| |
| if (TEST_RETURN == -1) { |
| if (TEST_ERRNO == EINTR) |
| exit(0); |
| |
| fprintf(stderr, "Child: Pause returned -1 but errno is %d (%s)\n", |
| TEST_ERRNO, strerror(TEST_ERRNO)); |
| exit(1); |
| } |
| |
| fprintf(stderr, "Child: Pause returned %ld\n", TEST_RETURN); |
| exit(1); |
| } |
| |
| static void setup(void) |
| { |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| } |
| |
| static void cleanup(void) |
| { |
| } |