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/ioctl.h> 39 #include <sys/poll.h> 40 #include <sys/queue.h> 41 #include <sys/un.h> 42 43 #include <err.h> 44 #include <errno.h> 45 #include <fcntl.h> 46 #include <libgen.h> 47 #include <regex.h> 48 #include <signal.h> 49 #include <stdarg.h> 50 #include <stdio.h> 51 #include <stdlib.h> 52 #include <string.h> 53 #include <syslog.h> 54 #include <unistd.h> 55 #include <pthread.h> 56 #include <assert.h> 57 58 #include <libprop/proplib.h> 59 #include <sys/udev.h> 60 #include "udevd.h" 61 62 struct cmd_function cmd_fn[] = { 63 { .cmd = "getdevs", .fn = client_cmd_getdevs}, 64 { .cmd = "monitor", .fn = client_cmd_monitor}, 65 {NULL, NULL} 66 }; 67 68 static void *client_thread(void *arg); 69 70 void 71 handle_new_connection(int s) 72 { 73 struct client_info *cli_info; 74 struct sockaddr_un addr; 75 int fd; 76 socklen_t saddr_len = sizeof(struct sockaddr_un); 77 78 fd = accept(s, (struct sockaddr *)&addr, &saddr_len); 79 if (fd < 0) { 80 syslog(LOG_ERR, "uh, oh, accept failed with %d", errno); 81 return; 82 } 83 84 block_descriptor(fd); 85 cli_info = malloc(sizeof(struct client_info)); 86 memset(cli_info, 0, sizeof(struct client_info)); 87 88 cli_info->fd = fd; 89 pthread_create(&cli_info->tid, NULL, client_thread, (void *)cli_info); 90 } 91 92 93 static void * 94 client_thread(void *arg) 95 { 96 prop_dictionary_t dict; 97 prop_string_t ps; 98 prop_object_t po; 99 struct client_info *cli; 100 char *xml; 101 int r, n, error; 102 103 r = pthread_detach(pthread_self()); 104 assert(r == 0); 105 106 r = ignore_signal(SIGPIPE); 107 if (r != 0) 108 err(1, "could not ignore_signal SIGPIPE"); 109 110 cli = (struct client_info *)arg; 111 for (;;) { 112 n = read_xml(cli->fd, &xml); 113 if (n == 0) 114 goto cli_disconnect; 115 else if (n < 0) 116 goto error_out; 117 118 xml[n+1] = '\0'; 119 120 dict = prop_dictionary_internalize(xml); 121 free(xml); 122 123 if (dict == NULL) { 124 syslog(LOG_ERR, "internalization of received XML failed"); 125 goto error_out; 126 } 127 128 po = prop_dictionary_get(dict, "command"); 129 if (po == NULL || prop_object_type(po) != PROP_TYPE_STRING) { 130 syslog(LOG_ERR, "received dictionary doesn't contain a key 'command'"); 131 prop_object_release(dict); 132 continue; 133 } 134 135 ps = po; 136 137 syslog(LOG_DEBUG, "Received command: %s (from fd = %d)\n", prop_string_cstring_nocopy(ps), cli->fd); 138 for(n = 0; cmd_fn[n].cmd != NULL; n++) { 139 if (prop_string_equals_cstring(ps, cmd_fn[n].cmd)) 140 break; 141 } 142 143 if (cmd_fn[n].cmd != NULL) { 144 error = cmd_fn[n].fn(cli, dict); 145 if (error) { 146 prop_object_release(dict); 147 goto error_out; 148 } 149 } 150 prop_object_release(dict); 151 } 152 153 error_out: 154 155 cli_disconnect: 156 close(cli->fd); 157 cli->fd = -1; 158 free(cli); 159 return NULL; 160 } 161 162 int 163 client_cmd_getdevs(struct client_info *cli, prop_dictionary_t cli_dict) 164 { 165 struct pdev_array_entry *pae; 166 struct udev_monitor *udm; 167 prop_object_iterator_t iter; 168 prop_dictionary_t dict; 169 prop_object_t po; 170 prop_array_t pa; 171 char *xml; 172 ssize_t r; 173 int filters; 174 175 176 pa = NULL; 177 po = prop_dictionary_get(cli_dict, "filters"); 178 if ((po != NULL) && prop_object_type(po) == PROP_TYPE_ARRAY) { 179 pa = po; 180 filters = 1; 181 } else { 182 filters = 0; 183 } 184 185 pae = pdev_array_entry_get_last(); 186 if (pae == NULL) 187 return 1; 188 189 if (filters) { 190 udm = udev_monitor_init(cli, pa); 191 if (udm == NULL) { 192 pdev_array_entry_unref(pae); 193 return 1; 194 } 195 196 pa = prop_array_create_with_capacity(10); 197 198 iter = prop_array_iterator(pae->pdev_array); 199 if (iter == NULL) { 200 pdev_array_entry_unref(pae); 201 udev_monitor_free(udm); 202 return 1; 203 } 204 205 while ((dict = prop_object_iterator_next(iter)) != NULL) { 206 if (match_event_filter(udm, dict)) { 207 prop_array_add(pa, dict); 208 } 209 } 210 211 prop_object_iterator_release(iter); 212 udev_monitor_free(udm); 213 } else { 214 pa = pae->pdev_array; 215 } 216 217 xml = prop_array_externalize(pa); 218 if (filters) 219 prop_object_release(pa); 220 221 pdev_array_entry_unref(pae); 222 223 if (xml == NULL) 224 return 1; 225 226 r = send_xml(cli->fd, xml); 227 if (r < 0) 228 syslog(LOG_DEBUG, "error while send_xml (cmd_getdevs)\n"); 229 if (r == 0) 230 syslog(LOG_DEBUG, "EOF while send_xml (cmd_getdevs)\n"); 231 232 free(xml); 233 234 return 0; 235 } 236