| /* |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| /* |
| * Test Name: pause02 |
| * |
| * Test Description: |
| * 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. |
| * |
| * Expected Result: |
| * pause() should fail with return value -1 and set expected errno. |
| * |
| * Algorithm: |
| * Setup: |
| * Setup signal handling. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * Execute system call |
| * Check return code, if system call failed (return=-1) |
| * if errno set == expected errno |
| * Issue sys call fails with expected return value and errno. |
| * Otherwise, |
| * Issue sys call fails with unexpected errno. |
| * Otherwise, |
| * Issue sys call returns unexpected value. |
| * |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * |
| * Usage: <for command-line> |
| * pause02 [-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 |
| * |
| * RESTRICTIONS: |
| * None. |
| */ |
| #include <unistd.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <wait.h> |
| |
| #include "test.h" |
| #include "usctest.h" |
| |
| char *TCID = "pause02"; /* Test program identifier. */ |
| int TST_TOTAL = 1; /* Total number of test cases. */ |
| |
| int exp_enos[] = { EINTR, 0 }; |
| pid_t cpid; /* child process id */ |
| |
| void do_child(); /* Function to run in child process */ |
| void setup(); /* Main setup function of test */ |
| void cleanup(); /* cleanup function for the test */ |
| void sig_handle(int sig); /* signal handler for SIGINT */ |
| void kill_handle(int sig); /* sends SIGKILL for child */ |
| |
| #ifdef UCLINUX |
| void do_child_uclinux(); /* Setup SIGINT handler then do_child() */ |
| #endif |
| |
| int main(int ac, char **av) |
| { |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| int status; /* child process exit status */ |
| int rval; /* return value for wait() */ |
| |
| /* Parse standard options given to run the test. */ |
| 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_uclinux, ""); |
| #endif |
| |
| setup(); |
| |
| /* set the expected errnos... */ |
| TEST_EXP_ENOS(exp_enos); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| Tst_count = 0; |
| |
| /* Creat a new process using fork() */ |
| if ((cpid = FORK_OR_VFORK()) == -1) { |
| tst_brkm(TBROK, cleanup, "fork() failed"); |
| } |
| |
| if (cpid == 0) { /* Child process */ |
| #ifdef UCLINUX |
| if (self_exec(av[0], "") < 0) { |
| tst_brkm(TBROK, cleanup, "self_exec failed"); |
| } |
| #else |
| do_child(); |
| #endif |
| } |
| |
| /* Parent process */ |
| /* sleep to ensure the child executes */ |
| sleep(1); |
| |
| /* |
| * Send the SIGINT signal now, so that child |
| * returns from pause and resumes execution. |
| */ |
| kill(cpid, SIGINT); |
| |
| /* Sleep to ensure the signal sent is effected */ |
| sleep(1); |
| |
| /* |
| * In case pause() doesn't return witin 2 seconds, |
| * set the alarm to send SIGKILL for the child. |
| */ |
| signal(SIGALRM, kill_handle); |
| alarm(2); |
| |
| /* wait for child to exit */ |
| wait(&status); |
| |
| TEST_ERROR_LOG(status >> 8); |
| |
| /* Reset the timer in case pause() returned */ |
| alarm(0); |
| |
| /* |
| * Verify that, wait() returned due to normal |
| * or abnormal termination of child due to |
| * receipt of signal SIGKILL. |
| * Receipt of SIGKILL indicates that pause() |
| * didn't returned after receipt of SIGINT. |
| */ |
| if (WTERMSIG(status) == SIGKILL) { |
| rval = wait(&status); |
| if ((rval == -1) && (errno == ECHILD)) { |
| tst_resm(TFAIL, "pause() didn't return " |
| "as expected"); |
| } |
| } |
| } |
| |
| cleanup(); |
| tst_exit(); |
| |
| } |
| |
| /* |
| * do_child() |
| */ |
| void do_child() |
| { |
| /* Suspend the child using pause() */ |
| TEST(pause()); |
| |
| /* |
| * Child resumes execution after receipt of |
| * interrupt signal sent by the parent. |
| */ |
| TEST_ERROR_LOG(TEST_ERRNO); |
| if ((TEST_RETURN == -1) && (TEST_ERRNO == EINTR)) { |
| /* pause returned */ |
| tst_resm(TPASS, "Functionality of pause() " "is correct"); |
| } else { |
| tst_resm(TFAIL, "pause() returned %ld, error=%d", |
| TEST_RETURN, TEST_ERRNO); |
| } |
| if (TEST_RETURN == -1) { |
| exit(TEST_ERRNO); |
| } else { |
| exit(-1); |
| } |
| } |
| |
| /* |
| * do_child_uclinux() |
| */ |
| void do_child_uclinux() |
| { |
| /* Catch SIGINT */ |
| if (signal(SIGINT, sig_handle) == SIG_ERR) { |
| tst_brkm(TBROK, cleanup, "signal() fails to catch SIGINT"); |
| } |
| |
| do_child(); |
| } |
| |
| /* |
| * setup() - performs all ONE TIME setup for this test. |
| * Set the signal handler to catch SIGINT signal. |
| */ |
| void setup() |
| { |
| |
| tst_sig(FORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| /* Catch SIGINT */ |
| if (signal(SIGINT, sig_handle) == SIG_ERR) { |
| tst_brkm(TBROK, cleanup, "signal() fails to catch SIGINT"); |
| } |
| } |
| |
| /* |
| * sig_handle(int sig) |
| * This is the signal handler to handle the SIGINT signal. |
| * When the child receives SIGINT signal while pausing, parent catches |
| * this signal by executing this handler which simply returns. |
| */ |
| void sig_handle(int sig) |
| { |
| } |
| |
| /* |
| * void |
| * kill_handle(int sig) |
| * This is the signal handler to handle the SIGALRM signal. |
| * This handler is executed if and only if pause() doesn't return |
| * in child after sending SIGINT signal. This means child remains |
| * in sleep until kill signal is sent. |
| * Send SIGKILL to child to terminate it. |
| */ |
| void kill_handle(int sig) |
| { |
| /* Send SIGKILL to child */ |
| kill(cpid, SIGKILL); |
| } |
| |
| /* |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| */ |
| void cleanup() |
| { |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| } |