1 /*
2 * bthidd.c
3 */
4
5 /*-
6 * SPDX-License-Identifier: BSD-2-Clause
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 */
34
35 #include <sys/time.h>
36 #include <sys/queue.h>
37 #include <assert.h>
38 #define L2CAP_SOCKET_CHECKED
39 #include <bluetooth.h>
40 #include <err.h>
41 #include <errno.h>
42 #include <signal.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <syslog.h>
47 #include <unistd.h>
48 #include <usbhid.h>
49 #include "bthid_config.h"
50 #include "bthidd.h"
51
52 static int32_t write_pid_file (char const *file);
53 static int32_t remove_pid_file (char const *file);
54 static int32_t elapsed (int32_t tval);
55 static void sighandler (int32_t s);
56 static void usage (void);
57
58 /*
59 * bthidd
60 */
61
62 static int32_t done = 0; /* are we done? */
63
64 int32_t
main(int32_t argc,char * argv[])65 main(int32_t argc, char *argv[])
66 {
67 struct bthid_server srv;
68 struct sigaction sa;
69 char const *pid_file = BTHIDD_PIDFILE;
70 char *ep;
71 int32_t opt, detach, tval, uinput;
72
73 memset(&srv, 0, sizeof(srv));
74 memset(&srv.bdaddr, 0, sizeof(srv.bdaddr));
75 detach = 1;
76 tval = 10; /* sec */
77 uinput = 0;
78
79 while ((opt = getopt(argc, argv, "a:c:dH:hp:t:u")) != -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 'u': /* enable evdev support */
115 uinput = 1;
116 break;
117
118 case 'h':
119 default:
120 usage();
121 /* NOT REACHED */
122 }
123 }
124
125 openlog(BTHIDD_IDENT, LOG_PID|LOG_PERROR|LOG_NDELAY, LOG_USER);
126
127 /* Become daemon if required */
128 if (detach && daemon(0, 0) < 0) {
129 syslog(LOG_CRIT, "Could not become daemon. %s (%d)",
130 strerror(errno), errno);
131 exit(1);
132 }
133
134 /* Install signal handler */
135 memset(&sa, 0, sizeof(sa));
136 sa.sa_handler = sighandler;
137
138 if (sigaction(SIGTERM, &sa, NULL) < 0 ||
139 sigaction(SIGHUP, &sa, NULL) < 0 ||
140 sigaction(SIGINT, &sa, NULL) < 0) {
141 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
142 strerror(errno), errno);
143 exit(1);
144 }
145
146 sa.sa_handler = SIG_IGN;
147 if (sigaction(SIGPIPE, &sa, NULL) < 0) {
148 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
149 strerror(errno), errno);
150 exit(1);
151 }
152
153 sa.sa_handler = SIG_IGN;
154 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT;
155 if (sigaction(SIGCHLD, &sa, NULL) < 0) {
156 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
157 strerror(errno), errno);
158 exit(1);
159 }
160
161 if (read_config_file() < 0 || read_hids_file() < 0 ||
162 server_init(&srv) < 0 || write_pid_file(pid_file) < 0)
163 exit(1);
164
165 srv.uinput = uinput;
166
167 for (done = 0; !done; ) {
168 if (elapsed(tval))
169 client_rescan(&srv);
170
171 if (server_do(&srv) < 0)
172 break;
173 }
174
175 server_shutdown(&srv);
176 remove_pid_file(pid_file);
177 clean_config();
178 closelog();
179
180 return (0);
181 }
182
183 /*
184 * Write pid file
185 */
186
187 static int32_t
write_pid_file(char const * file)188 write_pid_file(char const *file)
189 {
190 FILE *pid;
191
192 assert(file != NULL);
193
194 if ((pid = fopen(file, "w")) == NULL) {
195 syslog(LOG_ERR, "Could not open file %s. %s (%d)",
196 file, strerror(errno), errno);
197 return (-1);
198 }
199
200 fprintf(pid, "%d", getpid());
201 fclose(pid);
202
203 return (0);
204 }
205
206 /*
207 * Remote pid file
208 */
209
210 static int32_t
remove_pid_file(char const * file)211 remove_pid_file(char const *file)
212 {
213 assert(file != NULL);
214
215 if (unlink(file) < 0) {
216 syslog(LOG_ERR, "Could not unlink file %s. %s (%d)",
217 file, strerror(errno), errno);
218 return (-1);
219 }
220
221 return (0);
222 }
223
224 /*
225 * Returns true if desired time interval has elapsed
226 */
227
228 static int32_t
elapsed(int32_t tval)229 elapsed(int32_t tval)
230 {
231 static struct timeval last = { 0, 0 };
232 struct timeval now;
233
234 gettimeofday(&now, NULL);
235
236 if (now.tv_sec - last.tv_sec >= tval) {
237 last = now;
238 return (1);
239 }
240
241 return (0);
242 }
243
244 /*
245 * Signal handler
246 */
247
248 static void
sighandler(int32_t s)249 sighandler(int32_t s)
250 {
251 syslog(LOG_NOTICE, "Got signal %d, total number of signals %d",
252 s, ++ done);
253 }
254
255 /*
256 * Display usage and exit
257 */
258
259 static void
usage(void)260 usage(void)
261 {
262 fprintf(stderr,
263 "Usage: %s [options]\n" \
264 "Where options are:\n" \
265 " -a address specify address to listen on (default ANY)\n" \
266 " -c file specify config file name\n" \
267 " -d run in foreground\n" \
268 " -H file specify known HIDs file name\n" \
269 " -h display this message\n" \
270 " -p file specify PID file name\n" \
271 " -t tval specify client rescan interval (sec)\n" \
272 " -u enable evdev protocol support\n" \
273 "", BTHIDD_IDENT);
274 exit(255);
275 }
276
277