154 lines
3.0 KiB
C
154 lines
3.0 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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* fork06.c
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*
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* DESCRIPTION
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* Test that a process can fork children a large number of
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* times in succession
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*
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* ALGORITHM
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* Attempt to fork a child that exits immediately
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* Repeat it many times(1000), counting the number of successes and
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* failures
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*
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* USAGE
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* fork06
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*
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* HISTORY
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* 07/2001 Ported 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 <sys/wait.h>
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#include "test.h"
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#include "usctest.h"
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const char *TCID = "fork06";
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int TST_TOTAL = 1;
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extern int Tst_count;
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void setup(void);
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void cleanup(void) __attribute__((noreturn));
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#define NUMFORKS 1000
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int
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main(int ac, char **av)
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{
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int i, pid, status, childpid, succeed, fail;
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int lc; /* loop counter */
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const char *msg; /* message returned from parse_opts */
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/*
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* parse standard options
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*/
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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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/*NOTREACHED*/
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}
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/*
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* perform global setup for the test
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*/
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setup();
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/*
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* check looping state if -i option is given
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*/
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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/*
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* reset Tst_count in case we are looping.
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*/
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Tst_count = 0;
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succeed = 0;
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fail = 0;
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for (i = 0; i < NUMFORKS; i++) {
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if ((pid = fork()) == -1) {
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fail++;
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continue;
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}
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if (pid == 0) { /* child */
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_exit(0);
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}
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/* parent */
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childpid = wait(&status);
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if (pid != childpid) {
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tst_resm(TFAIL, "pid from wait %d", childpid);
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}
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succeed++;
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}
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tst_resm(TINFO, "tries %d", i);
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tst_resm(TINFO, "successes %d", succeed);
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tst_resm(TINFO, "failures %d", fail);
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if ((wait(&status)) == -1) {
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tst_resm(TINFO, "There were no children to wait for");
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} else {
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tst_resm(TINFO, "There were children left");
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}
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}
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cleanup();
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/*NOTREACHED*/
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}
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/*
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* setup() - performs all ONE TIME setup for this test
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*/
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void
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setup()
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{
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/*
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* capture signals
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*/
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tst_sig(FORK, DEF_HANDLER, cleanup);
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/*
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* Pause if that option was specified
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*/
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TEST_PAUSE;
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}
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/*
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* cleanup() - performs all ONE TIME cleanup for this test at
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* completion or premature exit
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*/
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void
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cleanup()
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{
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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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tst_exit();
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}
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