157 lines
3.3 KiB
C
157 lines
3.3 KiB
C
/*
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* Copyright (c) International Business Machines Corp., 2001
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* Copyright (c) 2012 Cyril Hrubis <chrubis@suse.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Verify that, pause() returns -1 and sets errno to EINTR after receipt of a
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* signal which is caught by the calling process. Also, verify that the calling
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* process will resume execution from the point of suspension.
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*/
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/wait.h>
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#include "test.h"
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char *TCID = "pause02";
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int TST_TOTAL = 1;
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static pid_t cpid;
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static void do_child(void);
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static void setup(void);
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static void cleanup(void);
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int main(int ac, char **av)
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{
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int lc;
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int status;
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tst_parse_opts(ac, av, NULL, NULL);
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#ifdef UCLINUX
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maybe_run_child(&do_child, "");
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#endif
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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cpid = FORK_OR_VFORK();
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switch (cpid) {
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case -1:
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tst_brkm(TBROK, cleanup, "fork() failed");
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break;
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case 0:
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#ifdef UCLINUX
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if (self_exec(av[0], "") < 0)
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tst_brkm(TBROK, cleanup, "self_exec failed");
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#else
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do_child();
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#endif
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break;
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default:
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break;
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}
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/*
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* Wait for child to enter pause().
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*/
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TST_PROCESS_STATE_WAIT(cleanup, cpid, 'S');
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/*
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* Send the SIGINT signal now, so that child
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* returns from pause and resumes execution.
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*/
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kill(cpid, SIGINT);
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wait(&status);
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if (WIFEXITED(status)) {
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if (WEXITSTATUS(status) == 0)
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tst_resm(TPASS, "pause was interrupted correctly");
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else
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tst_resm(TFAIL, "pause was interrupted but the "
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"retval and/or errno was wrong");
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continue;
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}
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if (WIFSIGNALED(status)) {
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switch (WTERMSIG(status)) {
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case SIGALRM:
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tst_resm(TFAIL, "Timeout: SIGINT wasn't received by child");
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break;
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default:
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tst_resm(TFAIL, "Child killed by signal");
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}
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continue;
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}
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tst_resm(TFAIL, "Pause was not interrupted");
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}
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cleanup();
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tst_exit();
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}
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static void sig_handle(int sig)
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{
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}
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static void do_child(void)
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{
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/* avoid LTP framework to do whatever it likes */
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signal(SIGALRM, SIG_DFL);
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if (signal(SIGINT, sig_handle) == SIG_ERR) {
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fprintf(stderr, "Child: Failed to setup signal handler\n");
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exit(1);
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}
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/* Commit suicide after 10 seconds */
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alarm(10);
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TEST(pause());
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if (TEST_RETURN == -1) {
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if (TEST_ERRNO == EINTR)
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exit(0);
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fprintf(stderr, "Child: Pause returned -1 but errno is %d (%s)\n",
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TEST_ERRNO, strerror(TEST_ERRNO));
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exit(1);
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}
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fprintf(stderr, "Child: Pause returned %ld\n", TEST_RETURN);
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exit(1);
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}
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static void setup(void)
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{
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tst_sig(FORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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}
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static void cleanup(void)
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{
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}
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