1 /* 2 * bthidd.c 3 */ 4 5 /*- 6 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 7 * 8 * Copyright (c) 2006 Maksim Yevmenkin <m_evmenkin@yahoo.com> 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * $Id: bthidd.c,v 1.8 2006/09/07 21:06:53 max Exp $ 33 * $FreeBSD$ 34 */ 35 36 #include <sys/time.h> 37 #include <sys/queue.h> 38 #include <assert.h> 39 #define L2CAP_SOCKET_CHECKED 40 #include <bluetooth.h> 41 #include <err.h> 42 #include <errno.h> 43 #include <signal.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <string.h> 47 #include <syslog.h> 48 #include <unistd.h> 49 #include <usbhid.h> 50 #include "bthid_config.h" 51 #include "bthidd.h" 52 53 static int32_t write_pid_file (char const *file); 54 static int32_t remove_pid_file (char const *file); 55 static int32_t elapsed (int32_t tval); 56 static void sighandler (int32_t s); 57 static void usage (void); 58 59 /* 60 * bthidd 61 */ 62 63 static int32_t done = 0; /* are we done? */ 64 65 int32_t 66 main(int32_t argc, char *argv[]) 67 { 68 struct bthid_server srv; 69 struct sigaction sa; 70 char const *pid_file = BTHIDD_PIDFILE; 71 char *ep; 72 int32_t opt, detach, tval; 73 74 memset(&srv, 0, sizeof(srv)); 75 memset(&srv.bdaddr, 0, sizeof(srv.bdaddr)); 76 detach = 1; 77 tval = 10; /* sec */ 78 79 while ((opt = getopt(argc, argv, "a:c:dH:hp:t:")) != -1) { 80 switch (opt) { 81 case 'a': /* BDADDR */ 82 if (!bt_aton(optarg, &srv.bdaddr)) { 83 struct hostent *he; 84 85 if ((he = bt_gethostbyname(optarg)) == NULL) 86 errx(1, "%s: %s", optarg, hstrerror(h_errno)); 87 88 memcpy(&srv.bdaddr, he->h_addr, sizeof(srv.bdaddr)); 89 } 90 break; 91 92 case 'c': /* config file */ 93 config_file = optarg; 94 break; 95 96 case 'd': /* do not detach */ 97 detach = 0; 98 break; 99 100 case 'H': /* hids file */ 101 hids_file = optarg; 102 break; 103 104 case 'p': /* pid file */ 105 pid_file = optarg; 106 break; 107 108 case 't': /* rescan interval */ 109 tval = strtol(optarg, (char **) &ep, 10); 110 if (*ep != '\0' || tval <= 0) 111 usage(); 112 break; 113 114 case 'h': 115 default: 116 usage(); 117 /* NOT REACHED */ 118 } 119 } 120 121 openlog(BTHIDD_IDENT, LOG_PID|LOG_PERROR|LOG_NDELAY, LOG_USER); 122 123 /* Become daemon if required */ 124 if (detach && daemon(0, 0) < 0) { 125 syslog(LOG_CRIT, "Could not become daemon. %s (%d)", 126 strerror(errno), errno); 127 exit(1); 128 } 129 130 /* Install signal handler */ 131 memset(&sa, 0, sizeof(sa)); 132 sa.sa_handler = sighandler; 133 134 if (sigaction(SIGTERM, &sa, NULL) < 0 || 135 sigaction(SIGHUP, &sa, NULL) < 0 || 136 sigaction(SIGINT, &sa, NULL) < 0) { 137 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)", 138 strerror(errno), errno); 139 exit(1); 140 } 141 142 sa.sa_handler = SIG_IGN; 143 if (sigaction(SIGPIPE, &sa, NULL) < 0) { 144 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)", 145 strerror(errno), errno); 146 exit(1); 147 } 148 149 sa.sa_handler = SIG_IGN; 150 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT; 151 if (sigaction(SIGCHLD, &sa, NULL) < 0) { 152 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)", 153 strerror(errno), errno); 154 exit(1); 155 } 156 157 if (read_config_file() < 0 || read_hids_file() < 0 || 158 server_init(&srv) < 0 || write_pid_file(pid_file) < 0) 159 exit(1); 160 161 for (done = 0; !done; ) { 162 if (elapsed(tval)) 163 client_rescan(&srv); 164 165 if (server_do(&srv) < 0) 166 break; 167 } 168 169 server_shutdown(&srv); 170 remove_pid_file(pid_file); 171 clean_config(); 172 closelog(); 173 174 return (0); 175 } 176 177 /* 178 * Write pid file 179 */ 180 181 static int32_t 182 write_pid_file(char const *file) 183 { 184 FILE *pid; 185 186 assert(file != NULL); 187 188 if ((pid = fopen(file, "w")) == NULL) { 189 syslog(LOG_ERR, "Could not open file %s. %s (%d)", 190 file, strerror(errno), errno); 191 return (-1); 192 } 193 194 fprintf(pid, "%d", getpid()); 195 fclose(pid); 196 197 return (0); 198 } 199 200 /* 201 * Remote pid file 202 */ 203 204 static int32_t 205 remove_pid_file(char const *file) 206 { 207 assert(file != NULL); 208 209 if (unlink(file) < 0) { 210 syslog(LOG_ERR, "Could not unlink file %s. %s (%d)", 211 file, strerror(errno), errno); 212 return (-1); 213 } 214 215 return (0); 216 } 217 218 /* 219 * Returns true if desired time interval has elapsed 220 */ 221 222 static int32_t 223 elapsed(int32_t tval) 224 { 225 static struct timeval last = { 0, 0 }; 226 struct timeval now; 227 228 gettimeofday(&now, NULL); 229 230 if (now.tv_sec - last.tv_sec >= tval) { 231 last = now; 232 return (1); 233 } 234 235 return (0); 236 } 237 238 /* 239 * Signal handler 240 */ 241 242 static void 243 sighandler(int32_t s) 244 { 245 syslog(LOG_NOTICE, "Got signal %d, total number of signals %d", 246 s, ++ done); 247 } 248 249 /* 250 * Display usage and exit 251 */ 252 253 static void 254 usage(void) 255 { 256 fprintf(stderr, 257 "Usage: %s [options]\n" \ 258 "Where options are:\n" \ 259 " -a address specify address to listen on (default ANY)\n" \ 260 " -c file specify config file name\n" \ 261 " -d run in foreground\n" \ 262 " -H file specify known HIDs file name\n" \ 263 " -h display this message\n" \ 264 " -p file specify PID file name\n" \ 265 " -t tval specify client rescan interval (sec)\n" \ 266 "", BTHIDD_IDENT); 267 exit(255); 268 } 269 270