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