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/stat.h> 38 #include <sys/socket.h> 39 #include <sys/un.h> 40 41 #include <err.h> 42 #include <errno.h> 43 #include <fcntl.h> 44 #include <libgen.h> 45 #include <regex.h> 46 #include <signal.h> 47 #include <stdarg.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 #include <syslog.h> 52 #include <unistd.h> 53 54 #include <libprop/proplib.h> 55 #include <sys/udev.h> 56 #include "udevd.h" 57 58 int 59 send_xml(int s, char *xml) 60 { 61 ssize_t r,n; 62 size_t sz; 63 64 sz = strlen(xml) + 1; 65 66 r = send(s, &sz, sizeof(sz), 0); 67 if (r <= 0) 68 return r; 69 70 r = 0; 71 while (r < (ssize_t)sz) { 72 n = send(s, xml+r, sz-r, 0); 73 if (n <= 0) 74 return n; 75 r += n; 76 } 77 78 return r; 79 } 80 81 int 82 read_xml(int s, char **buf) 83 { 84 char *xml; 85 size_t sz; 86 int n, r; 87 88 *buf = NULL; 89 90 n = recv(s, &sz, sizeof(sz), MSG_WAITALL); 91 if ((n <= 0) || (sz > 12*1024*1024)) /* Arbitrary limit */ 92 return n; 93 94 xml = malloc(sz+2); 95 r = 0; 96 while (r < (ssize_t)sz) { 97 n = recv(s, xml+r, sz-r, MSG_WAITALL); 98 if (n <= 0) { 99 free(xml); 100 return n; 101 } 102 r += n; 103 } 104 105 *buf = xml; 106 return r; 107 } 108 109 int 110 unblock_descriptor(int s) 111 { 112 int flags, ret; 113 114 flags = fcntl(s, F_GETFL, 0); 115 ret = fcntl(s, F_SETFL, flags | O_NONBLOCK); 116 return ret; 117 } 118 119 int 120 block_descriptor(int s) 121 { 122 int flags, ret; 123 124 flags = fcntl(s, F_GETFL, 0); 125 ret = fcntl(s, F_SETFL, flags & ~O_NONBLOCK); 126 return ret; 127 } 128 129 int 130 init_local_server(const char *sockfile, int socktype, int nonblock) 131 { 132 mode_t msk; 133 int s; 134 struct sockaddr_un un_addr; 135 136 if ((s = socket(AF_UNIX, socktype, 0)) < 0) 137 return -1; 138 139 memset(&un_addr, 0, sizeof(un_addr)); 140 un_addr.sun_family = AF_UNIX; 141 strncpy(un_addr.sun_path, sockfile, SOCKFILE_NAMELEN); 142 un_addr.sun_path[SOCKFILE_NAMELEN - 1] = '\0'; 143 144 /* 145 * DO NOT change `un_addr.sun_path' to `sockfile' here, 146 * since `sockfile' may have been truncated by above strncpy(3). 147 */ 148 unlink(un_addr.sun_path); 149 150 if (nonblock && unblock_descriptor(s) < 0) { 151 close(s); 152 return -1; 153 } 154 155 msk = umask(S_IXUSR|S_IXGRP|S_IXOTH); 156 if (bind(s, (struct sockaddr *)&un_addr, sizeof(un_addr)) < 0) { 157 close(s); 158 return -1; 159 } 160 umask(msk); /* Restore the original mask */ 161 162 if (socktype == SOCK_STREAM && listen(s, LOCAL_BACKLOG) < 0) { 163 close(s); 164 return -1; 165 } 166 167 return s; 168 } 169