e30a620063
tests/sys/kern/pipe - Fix style(9) bugs - Fix compiler warnings - Use `nitems(x)` instead of `sizeof(x) / sizeof(*x)` pattern The testcases will be converted over to ATF eventually, but for now will be integrated in as plain C tests MFC after: 1 week Sponsored by: EMC / Isilon Storage Division
139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/*
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Copyright (C) 2004 Michael J. Silbersack. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <assert.h>
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#include <err.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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/*
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* $FreeBSD$
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* The goal of this program is to see if fstat reports the correct
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* data count for a pipe. Prior to revision 1.172 of sys_pipe.c,
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* 0 would be returned once the pipe entered direct write mode.
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*
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* Linux (2.6) always returns zero, so it's not a valuable platform
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* for comparison.
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*/
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int
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main(void)
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{
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char buffer[32768], buffer2[32768], go[] = "go", go2[] = "go2";
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int desc[2], ipc_coord[2];
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ssize_t error;
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int successes = 0;
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struct stat status;
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pid_t new_pid;
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error = pipe(desc);
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if (error == -1)
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err(1, "Couldn't allocate data pipe");
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error = pipe(ipc_coord);
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if (error == -1)
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err(1, "Couldn't allocate IPC coordination pipe");
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new_pid = fork();
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assert(new_pid != -1);
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close(new_pid == 0 ? desc[0] : desc[1]);
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#define SYNC_R(i, _buf) do { \
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int _error = errno; \
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warnx("%d: waiting for synchronization", __LINE__); \
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if (read(ipc_coord[i], &_buf, sizeof(_buf)) != sizeof(_buf)) \
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err(1, "failed to synchronize (%s)", (i == 0 ? "parent" : "child")); \
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errno = _error; \
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} while(0)
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#define SYNC_W(i, _buf) do { \
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int _error = errno; \
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warnx("%d: sending synchronization", __LINE__); \
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if (write(ipc_coord[i], &_buf, sizeof(_buf)) != sizeof(_buf)) \
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err(1, "failed to synchronize (%s)", (i == 0 ? "child" : "parent")); \
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errno = _error; \
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} while(0)
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#define WRITE(s) do { \
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ssize_t _size; \
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if ((_size = write(desc[1], &buffer, s)) != s) \
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warn("short write; wrote %zd, expected %d", _size, s); \
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} while(0)
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if (new_pid == 0) {
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SYNC_R(0, go);
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WRITE(145);
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SYNC_W(0, go2);
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SYNC_R(0, go);
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WRITE(2048);
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SYNC_W(0, go2);
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SYNC_R(0, go);
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WRITE(4096);
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SYNC_W(0, go2);
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SYNC_R(0, go);
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WRITE(8191);
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SYNC_W(0, go2);
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SYNC_R(0, go);
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SYNC_W(0, go2); /* XXX: why is this required? */
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WRITE(8192);
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SYNC_W(0, go2);
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close(ipc_coord[0]);
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close(ipc_coord[1]);
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_exit(0);
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}
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while (successes < 5) {
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SYNC_W(1, go);
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SYNC_R(1, go2);
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fstat(desc[0], &status);
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error = read(desc[0], &buffer2, sizeof(buffer2));
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if (status.st_size != error)
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err(1, "FAILURE: stat size %jd read size %zd",
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(intmax_t)status.st_size, error);
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if (error > 0) {
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printf("SUCCESS at stat size %jd read size %zd\n",
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(intmax_t)status.st_size, error);
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successes++;
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}
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}
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exit(0);
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}
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