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 #include <cpu/inttypes.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <fcntl.h> 47 #include <libgen.h> 48 #include <regex.h> 49 #include <signal.h> 50 #include <stdarg.h> 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <syslog.h> 55 #include <unistd.h> 56 #include <pthread.h> 57 #include <assert.h> 58 59 #include <libprop/proplib.h> 60 #include <sys/udev.h> 61 #include "udevd.h" 62 63 struct cmd_function cmd_fn[] = { 64 { .cmd = "getdevs", .fn = client_cmd_getdevs}, 65 { .cmd = "monitor", .fn = client_cmd_monitor}, 66 {NULL, NULL} 67 }; 68 69 static void *client_thread(void *arg); 70 71 void 72 handle_new_connection(int s) 73 { 74 struct client_info *cli_info; 75 struct sockaddr_un addr; 76 int fd; 77 socklen_t saddr_len = sizeof(struct sockaddr_un); 78 79 fd = accept(s, (struct sockaddr *)&addr, &saddr_len); 80 if (fd < 0) { 81 syslog(LOG_ERR, "uh, oh, accept failed with %d", errno); 82 return; 83 } 84 85 block_descriptor(fd); 86 cli_info = malloc(sizeof(struct client_info)); 87 memset(cli_info, 0, sizeof(struct client_info)); 88 89 cli_info->fd = fd; 90 pthread_create(&cli_info->tid, NULL, client_thread, (void *)cli_info); 91 } 92 93 94 static void * 95 client_thread(void *arg) 96 { 97 prop_dictionary_t dict; 98 prop_string_t ps; 99 prop_object_t po; 100 struct client_info *cli; 101 char *xml; 102 int r, n, error; 103 104 r = pthread_detach(pthread_self()); 105 assert(r == 0); 106 107 r = ignore_signal(SIGPIPE); 108 if (r != 0) 109 err(1, "could not ignore_signal SIGPIPE"); 110 111 cli = (struct client_info *)arg; 112 for (;;) { 113 n = read_xml(cli->fd, &xml); 114 if (n == 0) 115 goto cli_disconnect; 116 else if (n < 0) 117 goto error_out; 118 119 xml[n+1] = '\0'; 120 121 dict = prop_dictionary_internalize(xml); 122 free(xml); 123 124 if (dict == NULL) { 125 syslog(LOG_ERR, "internalization of received XML failed"); 126 goto error_out; 127 } 128 129 po = prop_dictionary_get(dict, "command"); 130 if (po == NULL || prop_object_type(po) != PROP_TYPE_STRING) { 131 syslog(LOG_ERR, "received dictionary doesn't contain a key 'command'"); 132 prop_object_release(dict); 133 continue; 134 } 135 136 ps = po; 137 138 syslog(LOG_DEBUG, "Received command: %s (from fd = %d)\n", prop_string_cstring_nocopy(ps), cli->fd); 139 for(n = 0; cmd_fn[n].cmd != NULL; n++) { 140 if (prop_string_equals_cstring(ps, cmd_fn[n].cmd)) 141 break; 142 } 143 144 if (cmd_fn[n].cmd != NULL) { 145 error = cmd_fn[n].fn(cli, dict); 146 if (error) { 147 prop_object_release(dict); 148 goto error_out; 149 } 150 } 151 prop_object_release(dict); 152 } 153 154 error_out: 155 156 cli_disconnect: 157 close(cli->fd); 158 cli->fd = -1; 159 free(cli); 160 return NULL; 161 } 162 163 int 164 client_cmd_getdevs(struct client_info *cli, prop_dictionary_t cli_dict) 165 { 166 struct pdev_array_entry *pae; 167 struct udev_monitor *udm; 168 prop_object_iterator_t iter; 169 prop_dictionary_t dict; 170 prop_object_t po; 171 prop_array_t pa; 172 char *xml; 173 ssize_t r; 174 int filters; 175 176 177 pa = NULL; 178 po = prop_dictionary_get(cli_dict, "filters"); 179 if ((po != NULL) && prop_object_type(po) == PROP_TYPE_ARRAY) { 180 pa = po; 181 filters = 1; 182 } else { 183 filters = 0; 184 } 185 186 pae = pdev_array_entry_get_last(); 187 if (pae == NULL) 188 return 1; 189 190 if (filters) { 191 udm = udev_monitor_init(cli, pa); 192 if (udm == NULL) { 193 pdev_array_entry_unref(pae); 194 return 1; 195 } 196 197 pa = prop_array_create_with_capacity(10); 198 199 iter = prop_array_iterator(pae->pdev_array); 200 if (iter == NULL) { 201 pdev_array_entry_unref(pae); 202 udev_monitor_free(udm); 203 return 1; 204 } 205 206 while ((dict = prop_object_iterator_next(iter)) != NULL) { 207 if (match_event_filter(udm, dict)) { 208 prop_array_add(pa, dict); 209 } 210 } 211 212 prop_object_iterator_release(iter); 213 udev_monitor_free(udm); 214 } else { 215 pa = pae->pdev_array; 216 } 217 218 xml = prop_array_externalize(pa); 219 if (filters) 220 prop_object_release(pa); 221 222 pdev_array_entry_unref(pae); 223 224 if (xml == NULL) 225 return 1; 226 227 r = send_xml(cli->fd, xml); 228 if (r < 0) 229 syslog(LOG_DEBUG, "error while send_xml (cmd_getdevs)\n"); 230 if (r == 0) 231 syslog(LOG_DEBUG, "EOF while send_xml (cmd_getdevs)\n"); 232 233 free(xml); 234 235 return 0; 236 } 237