bthidd.c revision 330449 
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: stable/11/usr.sbin/bluetooth/bthidd/bthidd.c 330449 2018-03-05 07:26:05Z eadler $
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
53static int32_t	write_pid_file	(char const *file);
54static int32_t	remove_pid_file	(char const *file);
55static int32_t	elapsed		(int32_t tval);
56static void	sighandler	(int32_t s);
57static void	usage		(void);
58
59/*
60 * bthidd
61 */
62
63static int32_t	done = 0; /* are we done? */
64
65int32_t
66main(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
181static int32_t
182write_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
204static int32_t
205remove_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
222static int32_t
223elapsed(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
242static void
243sighandler(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
253static void
254usage(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