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
150 lines
3.8 KiB
C
150 lines
3.8 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/*
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* $FreeBSD$
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* This program simply tests writing through the reverse direction of
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* a pipe. Nothing too fancy, it's only needed because most pipe-using
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* programs never touch the reverse direction (it doesn't exist on
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* Linux.)
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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[65535], buffer2[65535], go[] = "go", go2[] = "go2";
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int desc[2], ipc_coord[2];
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size_t i;
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ssize_t total;
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int buggy, error;
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pid_t new_pid;
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buggy = 0;
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total = 0;
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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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buffer[0] = 'A';
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for (i = 1; i < (int)sizeof(buffer); i++) {
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buffer[i] = buffer[i - 1] + 1;
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if (buffer[i] > 'Z')
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buffer[i] = 'A';
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}
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new_pid = fork();
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assert(new_pid != -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[total], s)) != s) \
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warn("short write; wrote %zd, expected %d", _size, s); \
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total += _size; \
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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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for (i = 0; i < 8; i++)
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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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for (i = 0; i < 2; i++)
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WRITE(4096);
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SYNC_W(0, go2);
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_exit(0);
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}
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SYNC_W(1, go);
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SYNC_R(1, go2);
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error = read(desc[0], &buffer2, 8 * 4096);
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total += error;
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printf("Read %d bytes\n", error);
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SYNC_W(1, go);
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SYNC_R(1, go2);
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error = read(desc[0], &buffer2[total], 2 * 4096);
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total += error;
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printf("Read %d bytes, done\n", error);
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if (memcmp(buffer, buffer2, total) != 0) {
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for (i = 0; i < (size_t)total; i++) {
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if (buffer[i] != buffer2[i]) {
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buggy = 1;
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printf("Location %zu input: %hhx "
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"output: %hhx\n",
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i, buffer[i], buffer2[i]);
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}
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}
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}
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waitpid(new_pid, NULL, 0);
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if ((buggy == 1) || (total != 10 * 4096))
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errx(1, "FAILED");
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else
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printf("SUCCESS\n");
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exit(0);
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}
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