1 /* 2 * Copyright (c) 2010 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Alex Hornung <ahornung@gmail.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 #include <sys/types.h> 35 #include <sys/device.h> 36 #include <sys/wait.h> 37 #include <sys/socket.h> 38 #include <sys/un.h> 39 40 #include <err.h> 41 #include <errno.h> 42 #include <fcntl.h> 43 #include <libgen.h> 44 #include <regex.h> 45 #include <signal.h> 46 #include <stdarg.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <syslog.h> 51 #include <unistd.h> 52 53 #include <libprop/proplib.h> 54 #include <sys/udev.h> 55 #include "udevd.h" 56 57 int 58 send_xml(int s, char *xml) 59 { 60 ssize_t r,n; 61 size_t sz; 62 63 sz = strlen(xml) + 1; 64 65 r = send(s, &sz, sizeof(sz), 0); 66 if (r <= 0) 67 return r; 68 69 r = 0; 70 while (r < (ssize_t)sz) { 71 n = send(s, xml+r, sz-r, 0); 72 if (n <= 0) 73 return n; 74 r += n; 75 } 76 77 return r; 78 } 79 80 int 81 read_xml(int s, char **buf) 82 { 83 char *xml; 84 size_t sz; 85 int n, r; 86 87 *buf = NULL; 88 89 n = recv(s, &sz, sizeof(sz), MSG_WAITALL); 90 if ((n <= 0) || (sz > 12*1024*1024)) /* Arbitrary limit */ 91 return n; 92 93 xml = malloc(sz+2); 94 r = 0; 95 while (r < (ssize_t)sz) { 96 n = recv(s, xml+r, sz-r, MSG_WAITALL); 97 if (n <= 0) { 98 free(xml); 99 return n; 100 } 101 r += n; 102 } 103 104 *buf = xml; 105 return r; 106 } 107 108 int 109 unblock_descriptor(int s) 110 { 111 int flags, ret; 112 113 flags = fcntl(s, F_GETFL, 0); 114 ret = fcntl(s, F_SETFL, flags | O_NONBLOCK); 115 return ret; 116 } 117 118 int 119 block_descriptor(int s) 120 { 121 int flags, ret; 122 123 flags = fcntl(s, F_GETFL, 0); 124 ret = fcntl(s, F_SETFL, flags & ~O_NONBLOCK); 125 return ret; 126 } 127 128 int 129 init_local_server(const char *sockfile, int socktype, int nonblock) 130 { 131 int s; 132 struct sockaddr_un un_addr; 133 134 if ((s = socket(AF_UNIX, socktype, 0)) < 0) 135 return -1; 136 137 memset(&un_addr, 0, sizeof(un_addr)); 138 un_addr.sun_family = AF_UNIX; 139 strncpy(un_addr.sun_path, sockfile, SOCKFILE_NAMELEN); 140 un_addr.sun_path[SOCKFILE_NAMELEN - 1] = '\0'; 141 142 /* 143 * DO NOT change `un_addr.sun_path' to `sockfile' here, 144 * since `sockfile' may have been truncated by above strncpy(3). 145 */ 146 unlink(un_addr.sun_path); 147 148 if (nonblock && unblock_descriptor(s) < 0) { 149 close(s); 150 return -1; 151 } 152 153 if (bind(s, (struct sockaddr *)&un_addr, sizeof(un_addr)) < 0) { 154 close(s); 155 return -1; 156 } 157 158 if (socktype == SOCK_STREAM && listen(s, LOCAL_BACKLOG) < 0) { 159 close(s); 160 return -1; 161 } 162 163 return s; 164 } 165