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