138 lines
3.1 KiB
C
138 lines
3.1 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* pipe08.c
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*
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* DESCRIPTION
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* Check that a SIGPIPE signal is generated when a write is
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* attempted on an empty pipe.
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*
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* ALGORITHM
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* 1. Write to a pipe after closing the read side.
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* 2. Check for the signal SIGPIPE to be received.
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*
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* USAGE: <for command-line>
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* pipe08 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -f : Turn off functionality Testing.
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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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* USAGE
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* pipe08
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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 <errno.h>
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#include <unistd.h>
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#include <signal.h>
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#include <string.h>
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#include "test.h"
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char *TCID = "pipe08";
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int TST_TOTAL = 1;
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void setup(void);
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void cleanup(void);
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void sighandler(int);
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int main(int ac, char **av)
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{
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int lc;
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int pipefd[2]; /* fds for pipe read/write */
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char wrbuf[BUFSIZ];
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int written, length;
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int close_stat; /* exit status of close(read fd) */
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tst_parse_opts(ac, av, NULL, NULL);
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setup();
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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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TEST(pipe(pipefd));
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if (TEST_RETURN != 0) {
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tst_resm(TFAIL, "call failed unexpectedly");
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continue;
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}
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if ((close_stat = close(pipefd[0])) == -1) {
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tst_brkm(TBROK, cleanup, "close of read side failed");
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}
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strcpy(wrbuf, "abcdefghijklmnopqrstuvwxyz\0");
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length = strlen(wrbuf);
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/*
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* the SIGPIPE signal will be caught here or else
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* the program will dump core when the signal is
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* sent
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*/
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written = write(pipefd[1], wrbuf, length);
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if (written > 0)
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tst_brkm(TBROK, cleanup, "write succeeded unexpectedly");
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}
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cleanup();
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tst_exit();
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}
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/*
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* sighandler - catch signals and look for SIGPIPE
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*/
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void sighandler(int sig)
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{
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if (sig != SIGPIPE)
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tst_resm(TFAIL, "expected SIGPIPE, got %d", sig);
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else
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tst_resm(TPASS, "got expected SIGPIPE signal");
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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 setup(void)
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{
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tst_sig(NOFORK, sighandler, cleanup);
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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 cleanup(void)
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{
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}
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