2 * Copyright (c) 2004 Robert N. M. Watson
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/types.h>
30 #include <sys/socket.h>
33 #include <netinet/in.h>
55 * This test is intended to detect a leak of a file descriptor in the process
56 * following a failed non-blocking accept. It measures an available fd
57 * baseline, then performs 1000 failing accepts, then checks to see what the
58 * next fd is. It relies on sequential fd allocation, and will test for it
59 * briefly before beginning (not 100% reliable, but a good start).
62 main(int argc, char *argv[])
64 struct sockaddr_in sin;
67 int fd1, fd2, fd3, i, s;
73 * Check for sequential fd allocation, and give up early if not.
75 fd1 = dup(STDIN_FILENO);
76 fd2 = dup(STDIN_FILENO);
78 errx(-1, "Non-sequential fd allocation\n");
80 s = socket(PF_INET, SOCK_STREAM, 0);
82 errx(-1, "socket: %s", strerror(errno));
84 bzero(&sin, sizeof(sin));
85 sin.sin_len = sizeof(sin);
86 sin.sin_family = AF_INET;
87 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
88 sin.sin_port = htons(8080);
90 if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) != 0)
91 errx(-1, "bind: %s", strerror(errno));
93 if (listen(s, -1) != 0)
94 errx(-1, "listen: %s", strerror(errno));
96 i = fcntl(s, F_GETFL);
98 errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
100 if (fcntl(s, F_SETFL, i) != 0)
101 errx(-1, "ioctl(F_SETFL): %s", strerror(errno));
102 i = fcntl(s, F_GETFL);
104 errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
105 if ((i & O_NONBLOCK) != O_NONBLOCK)
106 errx(-1, "Failed to set O_NONBLOCK (i=0x%x)\n", i);
108 for (i = 0; i < LOOPS; i++) {
110 if (accept(s, (struct sockaddr *)&sin, &size) != -1)
111 errx(-1, "accept succeeded\n");
113 errx(-1, "accept: %s", strerror(errno));
117 * Allocate a file descriptor and make sure it's fd2+2. 2 because
118 * we allocate an fd for the socket.
120 fd3 = dup(STDIN_FILENO);
122 printf("not ok 1 - (%d, %d, %d)\n", fd1, fd2, fd3);
127 * Try failing accept's w/o non-blocking where the destination
128 * address pointer is invalid.
131 signal(SIGCHLD, child_died);
134 errx(-1, "fork: %s", strerror(errno));
137 * Child process does 1000 connect's.
140 bzero(&sin, sizeof(sin));
141 sin.sin_len = sizeof(sin);
142 sin.sin_family = AF_INET;
143 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
144 sin.sin_port = htons(8080);
146 for (i = 0; i < 1000; i++) {
147 s = socket(PF_INET, SOCK_STREAM, 0);
149 errx(-1, "socket: %s", strerror(errno));
150 if (connect(s, (struct sockaddr *)&sin,
152 errx(-1, "connect: %s", strerror(errno));
158 /* Reset back to a blocking socket. */
159 i = fcntl(s, F_GETFL);
161 errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
163 if (fcntl(s, F_SETFL, i) != 0)
164 errx(-1, "ioctl(F_SETFL): %s", strerror(errno));
165 i = fcntl(s, F_GETFL);
167 errx(-1, "ioctl(F_GETFL): %s", strerror(errno));
169 errx(-1, "Failed to clear O_NONBLOCK (i=0x%x)\n", i);
171 /* Do 1000 accept's with an invalid pointer. */
172 for (i = 0; !quit && i < 1000; i++) {
174 if (accept(s, (struct sockaddr *)(uintptr_t)(0x100),
176 errx(-1, "accept succeeded\n");
178 errx(-1, "accept: %s", strerror(errno));
181 if (waitpid(child, &status, 0) < 0)
182 errx(-1, "waitpid: %s", strerror(errno));
183 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
184 warnx("child process died");
187 * Allocate a file descriptor and make sure it's fd2+2. 2 because
188 * we allocate an fd for the socket.
190 fd3 = dup(STDIN_FILENO);
192 printf("not ok 2 - (%d, %d, %d)\n", fd1, fd2, fd3);