1 /*
2 * bthidd.c
3 */
4
5 /*-
6 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
7 *
8 * Copyright (c) 2006 Maksim Yevmenkin <[email protected]>
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
main(int32_t argc,char * argv[])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, uinput;
73
74 memset(&srv, 0, sizeof(srv));
75 memset(&srv.bdaddr, 0, sizeof(srv.bdaddr));
76 detach = 1;
77 tval = 10; /* sec */
78 uinput = 0;
79
80 while ((opt = getopt(argc, argv, "a:c:dH:hp:t:u")) != -1) {
81 switch (opt) {
82 case 'a': /* BDADDR */
83 if (!bt_aton(optarg, &srv.bdaddr)) {
84 struct hostent *he;
85
86 if ((he = bt_gethostbyname(optarg)) == NULL)
87 errx(1, "%s: %s", optarg, hstrerror(h_errno));
88
89 memcpy(&srv.bdaddr, he->h_addr, sizeof(srv.bdaddr));
90 }
91 break;
92
93 case 'c': /* config file */
94 config_file = optarg;
95 break;
96
97 case 'd': /* do not detach */
98 detach = 0;
99 break;
100
101 case 'H': /* hids file */
102 hids_file = optarg;
103 break;
104
105 case 'p': /* pid file */
106 pid_file = optarg;
107 break;
108
109 case 't': /* rescan interval */
110 tval = strtol(optarg, (char **) &ep, 10);
111 if (*ep != '\0' || tval <= 0)
112 usage();
113 break;
114
115 case 'u': /* enable evdev support */
116 uinput = 1;
117 break;
118
119 case 'h':
120 default:
121 usage();
122 /* NOT REACHED */
123 }
124 }
125
126 openlog(BTHIDD_IDENT, LOG_PID|LOG_PERROR|LOG_NDELAY, LOG_USER);
127
128 /* Become daemon if required */
129 if (detach && daemon(0, 0) < 0) {
130 syslog(LOG_CRIT, "Could not become daemon. %s (%d)",
131 strerror(errno), errno);
132 exit(1);
133 }
134
135 /* Install signal handler */
136 memset(&sa, 0, sizeof(sa));
137 sa.sa_handler = sighandler;
138
139 if (sigaction(SIGTERM, &sa, NULL) < 0 ||
140 sigaction(SIGHUP, &sa, NULL) < 0 ||
141 sigaction(SIGINT, &sa, NULL) < 0) {
142 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
143 strerror(errno), errno);
144 exit(1);
145 }
146
147 sa.sa_handler = SIG_IGN;
148 if (sigaction(SIGPIPE, &sa, NULL) < 0) {
149 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
150 strerror(errno), errno);
151 exit(1);
152 }
153
154 sa.sa_handler = SIG_IGN;
155 sa.sa_flags = SA_NOCLDSTOP|SA_NOCLDWAIT;
156 if (sigaction(SIGCHLD, &sa, NULL) < 0) {
157 syslog(LOG_CRIT, "Could not install signal handlers. %s (%d)",
158 strerror(errno), errno);
159 exit(1);
160 }
161
162 if (read_config_file() < 0 || read_hids_file() < 0 ||
163 server_init(&srv) < 0 || write_pid_file(pid_file) < 0)
164 exit(1);
165
166 srv.uinput = uinput;
167
168 for (done = 0; !done; ) {
169 if (elapsed(tval))
170 client_rescan(&srv);
171
172 if (server_do(&srv) < 0)
173 break;
174 }
175
176 server_shutdown(&srv);
177 remove_pid_file(pid_file);
178 clean_config();
179 closelog();
180
181 return (0);
182 }
183
184 /*
185 * Write pid file
186 */
187
188 static int32_t
write_pid_file(char const * file)189 write_pid_file(char const *file)
190 {
191 FILE *pid;
192
193 assert(file != NULL);
194
195 if ((pid = fopen(file, "w")) == NULL) {
196 syslog(LOG_ERR, "Could not open file %s. %s (%d)",
197 file, strerror(errno), errno);
198 return (-1);
199 }
200
201 fprintf(pid, "%d", getpid());
202 fclose(pid);
203
204 return (0);
205 }
206
207 /*
208 * Remote pid file
209 */
210
211 static int32_t
remove_pid_file(char const * file)212 remove_pid_file(char const *file)
213 {
214 assert(file != NULL);
215
216 if (unlink(file) < 0) {
217 syslog(LOG_ERR, "Could not unlink file %s. %s (%d)",
218 file, strerror(errno), errno);
219 return (-1);
220 }
221
222 return (0);
223 }
224
225 /*
226 * Returns true if desired time interval has elapsed
227 */
228
229 static int32_t
elapsed(int32_t tval)230 elapsed(int32_t tval)
231 {
232 static struct timeval last = { 0, 0 };
233 struct timeval now;
234
235 gettimeofday(&now, NULL);
236
237 if (now.tv_sec - last.tv_sec >= tval) {
238 last = now;
239 return (1);
240 }
241
242 return (0);
243 }
244
245 /*
246 * Signal handler
247 */
248
249 static void
sighandler(int32_t s)250 sighandler(int32_t s)
251 {
252 syslog(LOG_NOTICE, "Got signal %d, total number of signals %d",
253 s, ++ done);
254 }
255
256 /*
257 * Display usage and exit
258 */
259
260 static void
usage(void)261 usage(void)
262 {
263 fprintf(stderr,
264 "Usage: %s [options]\n" \
265 "Where options are:\n" \
266 " -a address specify address to listen on (default ANY)\n" \
267 " -c file specify config file name\n" \
268 " -d run in foreground\n" \
269 " -H file specify known HIDs file name\n" \
270 " -h display this message\n" \
271 " -p file specify PID file name\n" \
272 " -t tval specify client rescan interval (sec)\n" \
273 " -u enable evdev protocol support\n" \
274 "", BTHIDD_IDENT);
275 exit(255);
276 }
277
278