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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
*/
/*
* Test Name: poll01
*
* Test Description:
* Verify that valid open file descriptor must be provided to poll() to
* succeed.
*
* Expected Result:
* poll should return the correct values when an valid file descriptor is
* provided.
*
* Algorithm:
* Setup:
* Setup signal handling.
* Pause for SIGUSR1 if option specified.
*
* Test:
* Loop if the proper options are given.
* Execute system call
* Check return code, if system call failed (return=-1)
* Issue a FAIL message.
* Otherwise,
* Verify the Functionality of system call
* if successful,
* Issue Functionality-Pass message.
* Otherwise,
* Issue Functionality-Fail message.
* Cleanup:
* Print errno log and/or timing stats if options given
*
* Usage: <for command-line>
* poll01 [-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 <fcntl.h>
#include <sys/wait.h>
#include <sys/poll.h>
#include "test.h"
#include "usctest.h"
#define BUF_SIZE 512
const char *TCID="poll01"; /* Test program identifier. */
int TST_TOTAL=1; /* Total number of test cases. */
extern int Tst_count; /* Test Case counter for tst_* routines */
int fildes[2]; /* file descriptors of the pipe. */
struct pollfd fds[1]; /* struct. for poll() */
void setup(); /* Main setup function of test */
void cleanup(void) __attribute__((noreturn)); /* cleanup function for the test */
int
main(int ac, char **av)
{
int lc; /* loop counter */
const char *msg; /* message returned from parse_opts */
pid_t cpid; /* child process id */
char write_buf[] = "Testing\0"; /* buffer string for write */
char read_buf[BUF_SIZE]; /* buffer for read-end of pipe */
int status; /* exit status of child process */
int rval;
/* Parse standard options given to run the test. */
msg = parse_opts(ac, av, (option_t *)NULL, NULL);
if (msg != (char *)NULL) {
tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg);
}
/* Perform global setup for test */
setup();
/* Check looping state if -i option given */
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* Reset Tst_count in case we are looping. */
Tst_count = 0;
/*
* Call poll() with the TEST macro.
*/
TEST(poll(fds, 1, -1));
/* check return code of poll() */
if (TEST_RETURN == -1) {
tst_resm(TFAIL, "poll() failed on write, errno=%d"
" : %s", TEST_ERRNO, strerror(TEST_ERRNO));
continue;
}
/* write the message to the pipe */
if (write(fildes[1], write_buf, strlen(write_buf))
< (int)strlen(write_buf)) {
tst_brkm(TBROK, cleanup, "write() failed on write "
"to pipe, error:%d", errno);
}
/* Fork child process */
if ((cpid = fork()) == -1) {
tst_brkm(TBROK, cleanup, "fork() failed");
}
if (cpid == 0) { /* Child process */
/*
* close writing end of pipe and read from
* the pipe
*/
if (close(fildes[1]) == -1) {
tst_brkm(TFAIL, NULL, "close() failed on write "
"endof pipe, errno:%d", errno);
exit(1);
}
/*
* Set poll() data structures to check
* if data is present on read
*/
fds[0].fd = fildes[0];
fds[0].events = POLLIN;
/*
* If data are present, then read the data. If poll()
* and read() return expected values, then the
* functionality of poll() is correct.
*/
rval = (poll(fds, 1, -1));
if (rval == -1) {
tst_resm(TFAIL, "poll() failed on read - "
"errno=%d : %s",
TEST_ERRNO, strerror(errno));
exit(1);
}
/* Read data from read end of pipe */
if (read(fildes[0], read_buf, sizeof(read_buf)) !=
(int)strlen(write_buf)) {
tst_brkm(TFAIL, NULL, "read() failed - "
"error:%d", errno);
exit(1);
}
/* Now, do the actual comparision */
if (memcmp(read_buf, write_buf, strlen(write_buf))) {
tst_resm(TFAIL, "Data from reading pipe "
"are different");
exit(1);
}
/* Everything is fine, exit normally */
exit(0);
} else { /* Parent process */
/* Wait for child to complete execution */
wait(&status);
if (WEXITSTATUS(status) == 1) {
tst_resm(TFAIL, "child exited abnormally");
} else {
tst_resm(TPASS,
"Functionality of poll() successful");
}
}
} /* End for TEST_LOOPING */
/* Call cleanup() to undo setup done for the test. */
cleanup();
/*NOTREACHED*/
} /* End main */
/*
* setup() - performs all ONE TIME setup for this test.
* Creat read/write pipe using pipe().
* Set poll data structures to check writing to the pipe.
*/
void
setup()
{
/* capture signals */
tst_sig(FORK, DEF_HANDLER, cleanup);
/* Pause if that option was specified */
TEST_PAUSE;
/* Creat read/write pipe */
if (pipe(fildes) < 0) {
tst_brkm(TBROK, tst_exit,
"pipe() failed to create interprocess channel");
}
/* Set poll data structures */
fds[0].fd = fildes[1];
fds[0].events = POLLOUT;
}
/*
* cleanup() - performs all ONE TIME cleanup for this test at
* completion or premature exit.
* close read end of pipe if still open.
*/
void
cleanup()
{
/*
* print timing stats if that option was specified.
* print errno log if that option was specified.
*/
TEST_CLEANUP;
/* close read end of pipe if still open */
if (close(fildes[0]) < 0) {
tst_brkm(TFAIL, NULL, "close() failed on read-end of pipe, "
"errno:%d", errno);
}
/* exit with return code appropriate for results */
tst_exit();
}
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