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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
* pipe10.c
*
* DESCRIPTION
* Check that parent can open a pipe and have a child read from it
*
* ALGORITHM
* Parent opens pipe, child reads. Passes if child can read all the
* characters written by the parent.
*
* USAGE: <for command-line>
* pipe10 [-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.
*
* HISTORY
* 07/2001 Ported by Wayne Boyer
*
* RESTRICTIONS
* None
*/
#include <errno.h>
#include <sys/wait.h>
#include <test.h>
#include <usctest.h>
const char *TCID = "pipe10";
int TST_TOTAL = 1;
extern int Tst_count;
void setup(void);
void cleanup(void) __attribute__((noreturn));
int
main(int ac, char **av)
{
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
int fd[2]; /* fds for pipe read/write */
char wrbuf[BUFSIZ], rebuf[BUFSIZ];
int red, written; /* no of chars read and */
/* written to pipe */
int length, greater, forkstat;
/* 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*/
}
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* reset Tst_count in case we are looping */
Tst_count = 0;
TEST(pipe(fd));
if (TEST_RETURN == -1) {
tst_resm(TFAIL, "pipe creation failed");
continue;
}
if (!STD_FUNCTIONAL_TEST) {
tst_resm(TPASS, "call succeeded");
continue;
}
strcpy(wrbuf, "abcdefghijklmnopqrstuvwxyz\0");
length = strlen(wrbuf);
written = write(fd[1], wrbuf, length);
/* did write write at least some chars */
if ((written < 0) || (written > length)) {
tst_brkm(TBROK, cleanup, "write to pipe failed");
}
forkstat = fork();
if (forkstat == -1) {
tst_brkm(TBROK, cleanup, "fork() failed");
/*NOTREACHED*/
}
if (forkstat == 0) { /* child */
red = read(fd[0], rebuf, written);
/* did read , get at least some chars */
if ((red < 0) || (red > written)) {
tst_brkm(TBROK, cleanup, "read pipe failed");
}
greater = memcmp(rebuf, wrbuf, red);
/* are the strings written and read equal */
if (greater == 0) {
tst_resm(TPASS, "functionality is correct");
} else {
tst_resm(TFAIL, "read & write strings do "
"not match");
}
} else { /* parent */
/* let the child carry on */
exit(0);
}
}
cleanup();
/*NOTREACHED*/
}
/*
* setup() - performs all ONE TIME setup for this test.
*/
void
setup()
{
/* capture signals */
tst_sig(FORK, DEF_HANDLER, 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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