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/*
*
* 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
*/
/*
* NAME
* wait402.c
*
* DESCRIPTION
* wait402 - check for ECHILD errno when using an illegal pid value
*
* ALGORITHM
* loop if that option was specified
* issue the system call with an illegal pid value
* check the errno value
* issue a PASS message if we get ECHILD
* otherwise, the tests fails
* issue a FAIL message
* break any remaining tests
* call cleanup
*
* USAGE: <for command-line>
* wait402 [-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 John George
* -Ported
*
* Restrictions
* none
*/
#include "test.h"
#include "usctest.h"
#include <errno.h>
#define _USE_BSD
#include <sys/types.h>
#include <sys/resource.h>
#include <sys/wait.h>
/*
* See the Makefile for comments about the following preprocessor code.
*/
#if defined (__CYGWIN__)
#define PID_MAX 0xfffffffd
#else
#ifndef _LTP_TASKS_H
#include <linux/threads.h> /* for PID_MAX value - new */
#else
#include <linux/tasks.h> /* for PID_MAX value - old */
#endif
#endif
void cleanup(void);
void setup(void);
char *TCID= "wait402()";
int TST_TOTAL = 1;
extern int Tst_count;
int exp_enos[] = {10, 0};
main(int ac, char **av)
{
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
pid_t pid;
pid_t epid = PID_MAX + 1;
int status = 1;
struct rusage *rusage=NULL;
/* parse standard options */
if ((msg = parse_opts(ac, av, (option_t *) NULL, NULL)) != (char *) NULL) {
tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
}
setup(); /* global setup */
/* The following loop checks looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset Tst_count in case we are looping */
Tst_count = 0;
/*
* Allocate some space for the rusage structure.
*/
if ((rusage = (struct rusage *)malloc(sizeof(struct rusage)))
== NULL) {
tst_brkm(TBROK, cleanup, "malloc() failed");
}
pid = fork();
if (pid == -1) {
tst_brkm(TBROK, cleanup, "fork() failed");
}
if (pid == 0) { /* this is the child */
/*
* sleep for a moment to let us do the test
*/
sleep(1);
exit(0);
} else { /* this is the parent */
/*
* call wait4 with the TEST() macro. epid is set
* to an illegal positive value. This should give
* an ECHILD error.
*/
TEST(wait4(epid, &status, 0, rusage));
}
if (TEST_RETURN == 0) {
tst_brkm(TFAIL, cleanup, "call failed to produce expected error - errno = %d - %s", TEST_ERRNO, strerror(TEST_ERRNO));
}
TEST_ERROR_LOG(TEST_ERRNO);
switch (TEST_ERRNO) {
case ECHILD:
tst_resm(TPASS, "received expected failure - errno = %d - %s",
TEST_ERRNO, strerror(TEST_ERRNO));
break;
default:
tst_brkm(TFAIL, cleanup, "call failed to produce expected "
"error - errno = %d - %s", TEST_ERRNO,
strerror(TEST_ERRNO));
}
/*
* Clean up things in case we are looping.
*/
if (pid > 0) {
wait4(pid, &status, 0, rusage);
}
free(rusage);
rusage = NULL;
}
cleanup();
/*NOTREACHED*/
}
/*
* setup() - performs all the ONE TIME setup for this test.
*/
void
setup(void)
{
/* capture signals */
tst_sig(FORK, DEF_HANDLER, cleanup);
/* Set up the expected error numbers for -e option */
TEST_EXP_ENOS(exp_enos);
/* Pause if that option was specified */
TEST_PAUSE;
}
/*
* cleanup() - performs all the ONE TIME cleanup for this test at completion
* or premature exit.
*/
void
cleanup(void)
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* exit with return code appropriate for results */
tst_exit();
}
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