165 lines
3.7 KiB
C
165 lines
3.7 KiB
C
/*
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 <unistd.h>
|
|
#include <sys/wait.h>
|
|
#include <string.h>
|
|
#include "test.h"
|
|
|
|
char *TCID = "pipe10";
|
|
int TST_TOTAL = 1;
|
|
|
|
void setup(void);
|
|
void cleanup(void);
|
|
|
|
ssize_t do_read(int fd, void *buf, size_t count)
|
|
{
|
|
ssize_t n;
|
|
|
|
do {
|
|
n = read(fd, buf, count);
|
|
} while (n < 0 && errno == EINTR);
|
|
|
|
return n;
|
|
}
|
|
|
|
int main(int ac, char **av)
|
|
{
|
|
int lc;
|
|
|
|
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;
|
|
int retval = 0, status, e_code;
|
|
|
|
tst_parse_opts(ac, av, NULL, NULL);
|
|
|
|
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) {
|
|
retval = 1;
|
|
tst_resm(TFAIL, "pipe creation failed");
|
|
continue;
|
|
}
|
|
|
|
strcpy(wrbuf, "abcdefghijklmnopqrstuvwxyz");
|
|
length = strlen(wrbuf) + 1;
|
|
|
|
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_OR_VFORK();
|
|
|
|
if (forkstat == -1) {
|
|
tst_brkm(TBROK, cleanup, "fork() failed");
|
|
}
|
|
|
|
if (forkstat == 0) { /* child */
|
|
red = do_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 = strcmp(rebuf, wrbuf);
|
|
|
|
/* are the strings written and read equal */
|
|
if (greater == 0) {
|
|
tst_resm(TPASS, "functionality is correct");
|
|
} else {
|
|
retval = 1;
|
|
tst_resm(TFAIL, "read & write strings do "
|
|
"not match");
|
|
}
|
|
exit(retval);
|
|
} else { /* parent */
|
|
/* wait for the child to finish */
|
|
wait(&status);
|
|
/* make sure the child returned a good exit status */
|
|
e_code = status >> 8;
|
|
if (e_code != 0) {
|
|
tst_resm(TFAIL, "Failures reported above");
|
|
}
|
|
}
|
|
}
|
|
cleanup();
|
|
|
|
tst_exit();
|
|
}
|
|
|
|
/*
|
|
* setup() - performs all ONE TIME setup for this test.
|
|
*/
|
|
void setup(void)
|
|
{
|
|
|
|
tst_sig(FORK, DEF_HANDLER, cleanup);
|
|
|
|
TEST_PAUSE;
|
|
}
|
|
|
|
/*
|
|
* cleanup() - performs all ONE TIME cleanup for this test at
|
|
* completion or premature exit.
|
|
*/
|
|
void cleanup(void)
|
|
{
|
|
}
|