| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2002 |
| * |
| * 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 |
| * pipe03.c |
| * |
| * DESCRIPTION |
| * Make sure that writing to the read end of a pipe and reading from |
| * the write end of a pipe both fail. |
| * |
| * ALGORITHM |
| * 1. Open a pipe |
| * 2. Attempt to write to the [0] descriptor (expect -1) |
| * 3. Attempt to read from the [1] descriptor (expect -1) |
| * |
| * USAGE: <for command-line> |
| * pipe03 [-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 |
| * 11/2002 Ported by Paul Larson |
| */ |
| #include <unistd.h> |
| #include <errno.h> |
| #include "test.h" |
| |
| char *TCID = "pipe03"; |
| int TST_TOTAL = 1; |
| |
| void setup(void); |
| void cleanup(void); |
| |
| ssize_t safe_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; |
| const char *msg; |
| |
| int fildes[2]; /* fds for pipe read and write */ |
| char rbuf[BUFSIZ]; |
| |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| |
| /* reset tst_count in case we are looping */ |
| tst_count = 0; |
| |
| TEST(pipe(fildes)); |
| |
| if (TEST_RETURN == -1) |
| tst_brkm(TBROK | TTERRNO, cleanup, |
| "pipe() failed unexpectedly"); |
| |
| TEST(write(fildes[0], "A", 1)); |
| if (TEST_RETURN == -1 && TEST_ERRNO == EBADF) |
| tst_resm(TPASS, "expected failure writing to " |
| "read end of pipe"); |
| else |
| tst_resm(TFAIL | TTERRNO, |
| "success when writing to read " |
| "end of pipe ret=%ld", TEST_RETURN); |
| |
| TEST(safe_read(fildes[1], rbuf, 1)); |
| if (TEST_RETURN == -1 && TEST_ERRNO == EBADF) |
| tst_resm(TPASS, "expected failure reading from " |
| "write end of pipe"); |
| else |
| tst_resm(TFAIL | TTERRNO, "success when reading from " |
| "write end of pipe ret=%ld", TEST_RETURN); |
| } |
| cleanup(); |
| |
| tst_exit(); |
| } |
| |
| /* |
| * setup() - performs all ONE TIME setup for this test. |
| */ |
| void setup(void) |
| { |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| } |
| |
| /* |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| */ |
| void cleanup(void) |
| { |
| } |