169 lines
3.9 KiB
C
169 lines
3.9 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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* pipe10.c
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*
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* DESCRIPTION
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* Check that parent can open a pipe and have a child read from it
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*
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* ALGORITHM
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* Parent opens pipe, child reads. Passes if child can read all the
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* characters written by the parent.
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*
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* USAGE: <for command-line>
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* pipe10 [-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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* 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 <sys/wait.h>
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#include <test.h>
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#include <usctest.h>
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char *TCID = "pipe10";
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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);
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main(int ac, char **av)
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{
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int lc; /* loop counter */
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const char *msg; /* message returned from parse_opts */
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int pipe_ret; /* exit status of pipe */
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int fd[2]; /* fds for pipe read/write */
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char wrbuf[BUFSIZ], rebuf[BUFSIZ];
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int red, written; /* no of chars read and */
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/* written to pipe */
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int length, greater, forkstat;
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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, tst_exit, "OPTION PARSING ERROR - %s", msg);
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/*NOTREACHED*/
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}
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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(fd));
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if (TEST_RETURN == -1) {
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tst_resm(TFAIL, "pipe creation failed");
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continue;
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}
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if (!STD_FUNCTIONAL_TEST) {
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tst_resm(TPASS, "call succeeded");
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continue;
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}
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strcpy(wrbuf, "abcdefghijklmnopqrstuvwxyz\0");
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length = strlen(wrbuf);
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written = write(fd[1], wrbuf, length);
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/* did write write at least some chars */
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if ((written < 0) || (written > length)) {
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tst_brkm(TBROK, cleanup, "write to pipe failed");
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}
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forkstat = fork();
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if (forkstat == -1) {
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tst_brkm(TBROK, cleanup, "fork() failed");
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/*NOTREACHED*/
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}
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if (forkstat == 0) { /* child */
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red = read(fd[0], rebuf, written);
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/* did read , get at least some chars */
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if ((red < 0) || (red > written)) {
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tst_brkm(TBROK, cleanup, "read pipe failed");
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}
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greater = memcmp(rebuf, wrbuf, red);
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/* are the strings written and read equal */
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if (greater == 0) {
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tst_resm(TPASS, "functionality is correct");
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} else {
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tst_resm(TFAIL, "read & write strings do "
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"not match");
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}
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} else { /* parent */
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/* let the child carry on */
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exit(0);
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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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/* capture signals */
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tst_sig(FORK, DEF_HANDLER, cleanup);
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/* Pause if that option was specified */
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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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/* exit with return code appropriate for results */
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tst_exit();
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}
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