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>
38 * This program tests to make sure that wraparound writes and reads
39 * are working, assuming that 16K socket buffers are used. In order
40 * to really stress the pipe code with this test, kernel modifications
46 char buffer[32768], buffer2[32768], go[] = "go", go2[] = "go2";
47 int desc[2], ipc_coord[2];
57 err(1, "Couldn't allocate data pipe");
59 error = pipe(ipc_coord);
61 err(1, "Couldn't allocate IPC coordination pipe");
65 for (i = 1; i < (int)sizeof(buffer); i++) {
66 buffer[i] = buffer[i - 1] + 1;
72 assert(new_pid != -1);
74 #define SYNC_R(i, _buf) do { \
76 warnx("%d: waiting for synchronization", __LINE__); \
77 if (read(ipc_coord[i], &_buf, sizeof(_buf)) != sizeof(_buf)) \
78 err(1, "failed to synchronize (%s)", (i == 0 ? "parent" : "child")); \
82 #define SYNC_W(i, _buf) do { \
84 warnx("%d: sending synchronization", __LINE__); \
85 if (write(ipc_coord[i], &_buf, sizeof(_buf)) != sizeof(_buf)) \
86 err(1, "failed to synchronize (%s)", (i == 0 ? "child" : "parent")); \
90 #define WRITE(s) do { \
92 if ((_size = write(desc[1], &buffer[total], s)) != s) \
93 warn("short write; wrote %zd, expected %d", _size, s); \
112 error = read(desc[0], &buffer2, 8192);
114 printf("Read %zd bytes\n", error);
117 error = read(desc[0], &buffer2[total], 16384);
119 printf("Read %zd bytes, done\n", error);
121 if (memcmp(buffer, buffer2, total) != 0) {
122 for (i = 0; i < total; i++) {
123 if (buffer[i] != buffer2[i]) {
125 printf("Location %d input: %hhx output: %hhx\n",
126 i, buffer[i], buffer2[i]);
131 waitpid(new_pid, NULL, 0);