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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
* pipe08.c
*
* DESCRIPTION
* Check that a SIGPIPE signal is generated when a write is
* attempted on an empty pipe.
*
* ALGORITHM
* 1. Write to a pipe after closing the read side.
* 2. Check for the signal SIGPIPE to be received.
*
* USAGE: <for command-line>
* pipe08 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
* where, -c n : Run n copies concurrently.
* -f : Turn off functionality Testing.
* -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.
*
* USAGE
* pipe08
*
* HISTORY
* 07/2001 Ported by Wayne Boyer
*
* RESTRICTIONS
* None
*/
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include "test.h"
#include "usctest.h"
char *TCID = "pipe08";
int TST_TOTAL = 1;
extern int Tst_count;
void setup(void);
void cleanup(void);
void sighandler(int);
main(int ac, char **av)
{
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
int pipe_ret; /* exit status of pipe */
int pipefd[2]; /* fds for pipe read/write */
char wrbuf[BUFSIZ];
int written, length;
int close_stat; /* exit status of close(read fd) */
/* parse standard options */
if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
/*NOTREACHED*/
}
if (!STD_FUNCTIONAL_TEST) {
tst_resm(TWARN, "-f option should not be used");
}
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset Tst_count in case we are looping */
Tst_count = 0;
TEST(pipe(pipefd));
if (TEST_RETURN != 0) {
tst_resm(TFAIL, "call failed unexpectedly");
continue;
}
if ((close_stat = close(pipefd[0])) == -1) {
tst_brkm(TBROK, cleanup, "close of read side failed");
}
strcpy(wrbuf, "abcdefghijklmnopqrstuvwxyz\0");
length = strlen(wrbuf);
/*
* the SIGPIPE signal will be caught here or else
* the program will dump core when the signal is
* sent
*/
written = write(pipefd[1], wrbuf, length);
}
cleanup();
/*NOTREACHED*/
}
/*
* sighandler - catch signals and look for SIGPIPE
*/
void
sighandler(int sig)
{
if (sig != SIGPIPE) {
tst_resm(TFAIL, "expected SIGPIPE, got %d", sig);
} else {
tst_resm(TPASS, "got expected SIGPIPE signal");
}
}
/*
* setup() - performs all ONE TIME setup for this test.
*/
void
setup()
{
/* capture signals */
tst_sig(NOFORK, sighandler, cleanup);
/* Pause if that option was specified */
TEST_PAUSE;
}
/*
* 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;
/* exit with return code appropriate for results */
tst_exit();
}
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