313 lines
6.7 KiB
C
313 lines
6.7 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* NAME
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* semop05.c
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*
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* DESCRIPTION
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* semop05 - test for EINTR and EIDRM errors
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*
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* ALGORITHM
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* create a semaphore set with read and alter permissions
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* loop if that option was specified
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* set up the s_buf buffer
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* initialize the primitive semaphores
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* fork a child process
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* child calls semop() and sleeps
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* parent either removes the semaphore set or sends a signal to the child
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* parent then exits
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* child gets a return from the semop() call
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* check the errno value
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* issue a PASS message if we get EINTR or EIDRM
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* otherwise, the tests fails
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* issue a FAIL message
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* call cleanup
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*
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* USAGE: <for command-line>
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* semop05 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -e : Turn on errno logging.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* HISTORY
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* 03/2001 - Written by Wayne Boyer
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*
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* RESTRICTIONS
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* none
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*/
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#include "ipcsem.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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void sighandler(int);
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char *TCID = "semop05";
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int TST_TOTAL = 4;
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extern int Tst_count;
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int exp_enos[] = {EINTR, EIDRM, 0}; /* 0 terminated list of expected errnos */
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int sem_id_1 = -1;
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struct sembuf s_buf;
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struct test_case_t {
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union semun semunptr;
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short op;
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short flg;
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short num;
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int error;
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} TC[] = {
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/* EIRDM sem_op = 0 */
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{{1}, 0, 0, 2, EIDRM},
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/* EIRDM sem_op = -1 */
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{{0}, -1, 0, 3, EIDRM},
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/* EINTR sem_op = 0 */
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{{1}, 0, 0, 4, EINTR},
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/* EINTR sem_op = -1 */
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{{0}, -1, 0, 5, EINTR}
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};
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#ifdef UCLINUX
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void do_child_uclinux();
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static int i_uclinux;
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#endif
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int main(int ac, char **av)
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{
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int lc; /* loop counter */
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char *msg; /* message returned from parse_opts */
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int i;
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pid_t pid;
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void do_child(int);
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/* parse standard options */
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if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
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tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
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}
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#ifdef UCLINUX
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maybe_run_child(&do_child_uclinux, "dd", &i_uclinux, &sem_id_1);
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#endif
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setup(); /* global setup */
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/* The following loop checks looping state if -i option given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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/* reset Tst_count in case we are looping */
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Tst_count = 0;
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for (i=0; i<TST_TOTAL; i++) {
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/* initialize the s_buf buffer */
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s_buf.sem_op = TC[i].op;
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s_buf.sem_flg = TC[i].flg;
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s_buf.sem_num = TC[i].num;
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/* initialize all of the primitive semaphores */
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if (semctl(sem_id_1, TC[i].num, SETVAL, TC[i].semunptr)
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== -1) {
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tst_brkm(TBROK, cleanup, "semctl() failed");
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}
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if ((pid = fork()) == -1) {
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tst_brkm(TBROK, cleanup, "could not fork");
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}
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if (pid == 0) { /* child */
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#ifdef UCLINUX
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if (self_exec(av[0], "dd", i, sem_id_1) < 0) {
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tst_brkm(TBROK, cleanup,
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"could not self_exec");
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}
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#else
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do_child(i);
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#endif
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} else { /* parent */
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usleep(250000);
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/*
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* If we are testing for EIDRM then remove
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* the semaphore, else send a signal that
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* must be caught as we are testing for
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* EINTR.
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*/
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if (TC[i].error == EIDRM) {
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/* remove the semaphore resource */
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rm_sema(sem_id_1);
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} else {
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if (kill(pid, SIGHUP) == -1) {
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tst_brkm(TBROK, cleanup,
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"kill failed");
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}
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}
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/* let the child carry on */
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waitpid(pid,NULL,0);
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}
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/*
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* recreate the semaphore resource if needed
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*/
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if (TC[i].error == EINTR) {
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continue;
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}
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if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT |
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IPC_EXCL | SEM_RA)) == -1) {
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tst_brkm(TBROK, cleanup, "couldn't recreate "
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"semaphore");
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}
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}
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}
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cleanup();
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/*NOTREACHED*/
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return(0);
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}
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/*
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* do_child()
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*/
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void
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do_child(int i)
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{
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/*
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* make the call with the TEST macro
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*/
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TEST(semop(sem_id_1, &s_buf, 1));
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if (TEST_RETURN != -1) {
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tst_resm(TFAIL, "call succeeded when error expected");
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exit(-1);
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}
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TEST_ERROR_LOG(TEST_ERRNO);
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if (TEST_ERRNO == TC[i].error) {
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tst_resm(TPASS, "expected failure - errno = %d"
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" : %s", TEST_ERRNO, strerror(TEST_ERRNO));
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} else {
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tst_resm(TFAIL, "unexpected error - "
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"%d : %s", TEST_ERRNO, strerror(TEST_ERRNO));
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}
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exit(0);
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}
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#ifdef UCLINUX
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/*
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* do_child_uclinux() - capture signals, re-initialize s_buf then call do_child
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* with the appropriate argument
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*/
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void
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do_child_uclinux()
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{
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int i = i_uclinux;
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/* capture signals */
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tst_sig(FORK, sighandler, cleanup);
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/* initialize the s_buf buffer */
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s_buf.sem_op = TC[i].op;
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s_buf.sem_flg = TC[i].flg;
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s_buf.sem_num = TC[i].num;
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do_child(i);
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}
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#endif
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/*
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* sighandler() - handle signals
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*/
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void
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sighandler(int sig)
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{
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/* we don't need to do anything here */
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}
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/*
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* setup() - performs all the ONE TIME setup for this test.
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*/
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void
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setup(void)
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{
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/* capture signals */
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tst_sig(FORK, sighandler, cleanup);
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/* Set up the expected error numbers for -e option */
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TEST_EXP_ENOS(exp_enos);
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/* Pause if that option was specified */
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TEST_PAUSE;
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/*
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* Create a temporary directory and cd into it.
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* This helps to ensure that a unique msgkey is created.
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* See ../lib/libipc.c for more information.
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*/
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tst_tmpdir();
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/* get an IPC resource key */
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semkey = getipckey();
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/* create a semaphore set with read and alter permissions */
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/* and PSEMS "primitive" semaphores */
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if ((sem_id_1 =
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semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA)) == -1) {
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tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
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}
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}
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/*
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* cleanup() - performs all the ONE TIME cleanup for this test at completion
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* or premature exit.
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*/
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void
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cleanup(void)
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{
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/* if it exists, remove the semaphore resource */
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rm_sema(sem_id_1);
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/* Remove the temporary directory */
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tst_rmdir();
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/*
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* print timing stats if that option was specified.
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* print errno log if that option was specified.
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*/
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TEST_CLEANUP;
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/* exit with return code appropriate for results */
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tst_exit();
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}
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