2 Copyright (C) 2004 Michael J. Silbersack. All rights reserved.
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions
7 1. Redistributions of source code must retain the above copyright
8 notice, this list of conditions and the following disclaimer.
9 2. Redistributions in binary form must reproduce the above copyright
10 notice, this list of conditions and the following disclaimer in the
11 documentation and/or other materials provided with the distribution.
13 THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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26 #include <sys/types.h>
39 * This program tests to make sure that wraparound writes and reads
40 * are working, assuming that 16K socket buffers are used. In order
41 * to really stress the pipe code with this test, kernel modifications
47 char buffer[32768], buffer2[32768], go[] = "go", go2[] = "go2";
48 int desc[2], ipc_coord[2];
58 err(1, "Couldn't allocate data pipe");
60 error = pipe(ipc_coord);
62 err(1, "Couldn't allocate IPC coordination pipe");
66 for (i = 1; i < (int)sizeof(buffer); i++) {
67 buffer[i] = buffer[i - 1] + 1;
73 assert(new_pid != -1);
75 #define SYNC_R(i, _buf) do { \
77 warnx("%d: waiting for synchronization", __LINE__); \
78 if (read(ipc_coord[i], &_buf, sizeof(_buf)) != sizeof(_buf)) \
79 err(1, "failed to synchronize (%s)", (i == 0 ? "parent" : "child")); \
83 #define SYNC_W(i, _buf) do { \
85 warnx("%d: sending synchronization", __LINE__); \
86 if (write(ipc_coord[i], &_buf, sizeof(_buf)) != sizeof(_buf)) \
87 err(1, "failed to synchronize (%s)", (i == 0 ? "child" : "parent")); \
91 #define WRITE(s) do { \
93 if ((_size = write(desc[1], &buffer[total], s)) != s) \
94 warn("short write; wrote %zd, expected %d", _size, s); \
113 error = read(desc[0], &buffer2, 8192);
115 printf("Read %zd bytes\n", error);
118 error = read(desc[0], &buffer2[total], 16384);
120 printf("Read %zd bytes, done\n", error);
122 if (memcmp(buffer, buffer2, total) != 0) {
123 for (i = 0; i < total; i++) {
124 if (buffer[i] != buffer2[i]) {
126 printf("Location %d input: %hhx output: %hhx\n",
127 i, buffer[i], buffer2[i]);
132 waitpid(new_pid, NULL, 0);