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
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, 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
188static int32_t
189write_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
211static int32_t
212remove_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
229static int32_t
230elapsed(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
249static void
250sighandler(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
260static void
261usage(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