1 /*- 2 * Copyright (c) 2004 Robert N. M. Watson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 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. 13 * 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 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 32 #include <netinet/in.h> 33 34 #include <err.h> 35 #include <errno.h> 36 #include <fcntl.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <unistd.h> 41 42 #define LOOPS 500 43 44 /* 45 * This test is intended to detect a leak of a file descriptor in the process 46 * following a failed non-blocking accept. It measures an available fd 47 * baseline, then performs 1000 failing accepts, then checks to see what the 48 * next fd is. It relies on sequential fd allocation, and will test for it 49 * briefly before beginning (not 100% reliable, but a good start). 50 */ 51 int 52 main(int argc, char *argv[]) 53 { 54 struct sockaddr_in sin; 55 socklen_t size; 56 int fd1, fd2, fd3, i, s; 57 58 printf("1..1\n"); 59 60 /* 61 * Check for sequential fd allocation, and give up early if not. 62 */ 63 fd1 = dup(STDIN_FILENO); 64 fd2 = dup(STDIN_FILENO); 65 if (fd2 != fd1 + 1) 66 errx(-1, "Non-sequential fd allocation\n"); 67 68 s = socket(PF_INET, SOCK_STREAM, 0); 69 if (s == -1) 70 errx(-1, "socket: %s", strerror(errno)); 71 72 bzero(&sin, sizeof(sin)); 73 sin.sin_len = sizeof(sin); 74 sin.sin_family = AF_INET; 75 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 76 sin.sin_port = htons(8080); 77 78 if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) != 0) 79 errx(-1, "bind: %s", strerror(errno)); 80 81 if (listen(s, -1) != 0) 82 errx(-1, "listen: %s", strerror(errno)); 83 84 i = fcntl(s, F_GETFL); 85 if (i == -1) 86 errx(-1, "ioctl(F_GETFL): %s", strerror(errno)); 87 i |= O_NONBLOCK; 88 if (fcntl(s, F_SETFL, i) != 0) 89 errx(-1, "ioctl(F_SETFL): %s", strerror(errno)); 90 i = fcntl(s, F_GETFL); 91 if (i == -1) 92 errx(-1, "ioctl(F_GETFL): %s", strerror(errno)); 93 if ((i & O_NONBLOCK) != O_NONBLOCK) 94 errx(-1, "Failed to set O_NONBLOCK (i=0x%x)\n", i); 95 96 for (i = 0; i < LOOPS; i++) { 97 size = sizeof(sin); 98 if (accept(s, (struct sockaddr *)&sin, &size) != -1) 99 errx(-1, "accept succeeded\n"); 100 if (errno != EAGAIN) 101 errx(-1, "accept: %s", strerror(errno)); 102 } 103 104 /* 105 * Allocate a file descriptor and make sure it's fd2+2. 2 because 106 * we allocate an fd for the socket. 107 */ 108 fd3 = dup(STDIN_FILENO); 109 if (fd3 != fd2 + 2) 110 printf("not ok 1 - (%d, %d, %d)\n", fd1, fd2, fd3); 111 else 112 printf("ok 1\n"); 113 114 return (0); 115 } 116