usr.sbin/bthcid/bthcid.c

   1 /* $NetBSD: bthcid.c,v 1.3 2007/01/25 20:33:41 plunky Exp $ */
   2 /* $DragonFly: src/usr.sbin/bthcid/bthcid.c,v 1.1 2008/01/30 14:10:19 hasso Exp $ */
   3
   4 /*-
   5  * Copyright (c) 2006 Itronix Inc.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. The name of Itronix Inc. may not be used to endorse
  17  *    or promote products derived from this software without specific
  18  *    prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
  24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  27  * ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/stat.h>
  35 #include <sys/types.h>
  36 #include <sys/event.h>
  37 #include <sys/time.h>
  38 #include <bluetooth.h>
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <libutil.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <syslog.h>
  45 #include <unistd.h>
  46
  47 #include "bthcid.h"
  48
  49 const   char    *socket_name = BTHCID_SOCKET_NAME;
  50         int      detach = 1;
  51
  52 int     hci_kq;
  53
  54 static void     process_signal(int);
  55 static void     usage(void);
  56
  57 int
  58 main(int argc, char *argv[])
  59 {
  60         bdaddr_t        bdaddr;
  61         int             ch, hci_fd, control_fd;
  62         mode_t          mode;
  63         struct kevent   change;
  64         struct timespec timeout = { 0, 0 };
  65         struct pidfh    *pfh = NULL;
  66         const char      *pidfile = NULL;
  67
  68         bdaddr_copy(&bdaddr, BDADDR_ANY);
  69         mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP;
  70
  71         while ((ch = getopt(argc, argv, "d:fm:ns:h")) != -1) {
  72                 switch (ch) {
  73                 case 'd':
  74                         if (!bt_devaddr(optarg, &bdaddr))
  75                                 err(EXIT_FAILURE, "%s", optarg);
  76                         break;
  77
  78                 case 'f':
  79                         detach = 0;
  80                         break;
  81
  82                 case 'm':
  83                         mode = atoi(optarg);
  84                         break;
  85
  86                 case 'n':
  87                         socket_name = NULL;
  88                         break;
  89
  90                 case 's':
  91                         socket_name = optarg;
  92                         break;
  93
  94                 case 'h':
  95                 default:
  96                         usage();
  97                         /* NOT REACHED */
  98                 }
  99         }
 100
 101         if (getuid() != 0)
 102                 errx(EXIT_FAILURE,
 103                     "** ERROR: You should run %s as privileged user!",
 104                     getprogname());
 105
 106         if (detach)
 107                 if (daemon(0, 0) < 0)
 108                         err(EXIT_FAILURE, "Could not daemon()ize");
 109
 110         openlog(getprogname(), LOG_NDELAY | LOG_PERROR | LOG_PID, LOG_DAEMON);
 111
 112         if ((hci_kq = kqueue()) == -1) {
 113                 syslog(LOG_ERR, "could not create kqueue");
 114                 exit(EXIT_FAILURE);
 115         }
 116
 117         EV_SET(&change, SIGTERM, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
 118         kevent(hci_kq, &change, 1, NULL, 0, &timeout);
 119         EV_SET(&change, SIGINT, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
 120         kevent(hci_kq, &change, 1, NULL, 0, &timeout);
 121         EV_SET(&change, SIGHUP, EVFILT_SIGNAL, EV_ADD, 0, 0, NULL);
 122         kevent(hci_kq, &change, 1, NULL, 0, &timeout);
 123
 124         if ((hci_fd = init_hci(&bdaddr)) < 0) {
 125                 syslog(LOG_ERR, "init_hci(%s)", bt_ntoa(&bdaddr, NULL));
 126                 exit(EXIT_FAILURE);
 127         }
 128
 129         if ((control_fd = init_control(socket_name, mode)) < 0) {
 130                 syslog(LOG_ERR, "init_control(%s)", socket_name);
 131                 exit(EXIT_FAILURE);
 132         }
 133
 134         if (detach) {
 135                 pfh = pidfile_open(pidfile, 600, NULL);
 136                 if (pfh == NULL) {
 137                         syslog(LOG_ERR, "Could not create PID file: %m");
 138                         exit(EXIT_FAILURE);
 139                 }
 140                 pidfile_write(pfh);
 141         }
 142
 143         read_config_file();
 144         read_keys_file();
 145
 146         for ( ; ; ) {
 147                 int i, nevents;
 148                 struct kevent events[BTHCID_KQ_EVENTS], *event;
 149
 150                 nevents = kevent(hci_kq, NULL, 0, &events[0], BTHCID_KQ_EVENTS, NULL);
 151                 if (nevents == -1) {
 152                         syslog(LOG_ERR, "kevent failure");
 153                         exit(EXIT_FAILURE);
 154                 }
 155
 156                 for (i = 0; i < nevents; ++i) {
 157                         event = &events[i];
 158
 159                         if (event->filter == EVFILT_SIGNAL) {
 160                                 process_signal(event->ident);
 161                                 continue;
 162                         }
 163
 164                         if (event->filter == EVFILT_TIMER) {
 165                                 process_item(event->udata);
 166                                 continue;
 167                         }
 168
 169                         if (event->ident == (u_int)control_fd) {
 170                                 process_control(event->ident);
 171                                 continue;
 172                         } else if (event->ident == (u_int)hci_fd) {
 173                                 process_hci(event->ident);
 174                                 continue;
 175                         } else if (event->udata != NULL) {
 176                                 process_client(event->ident, event->udata);
 177                                 continue;
 178                         }
 179
 180                         syslog(LOG_DEBUG, "Unknown event for descriptor %d",
 181                             (int)event->ident);
 182                 }
 183         }
 184
 185         /* NOTREACHED */
 186         /* gcc fodder */
 187         exit(EXIT_FAILURE);
 188 }
 189
 190 static void
 191 process_signal(int s)
 192 {
 193         if (s == SIGHUP) {
 194                 syslog(LOG_DEBUG, "Got SIGHUP (%d). Dumping and rereading config", s);
 195                 dump_keys_file();
 196                 read_config_file();
 197                 read_keys_file();
 198                 return;
 199         }
 200
 201
 202
 203         syslog(LOG_DEBUG, "Exiting on signal %d", s);
 204
 205         if (socket_name)
 206                 unlink(socket_name);
 207
 208         clean_config();
 209         closelog();
 210         exit(EXIT_FAILURE);
 211
 212 }
 213
 214 /* Display usage and exit */
 215 static void
 216 usage(void)
 217 {
 218
 219         fprintf(stderr,
 220             "Usage: %s [-fhn] [-c config] [-d devaddr] [-m mode] [-s path]\n"
 221             "Where:\n"
 222             "\t-c config   specify config filename\n"
 223             "\t-d device   specify device address\n"
 224             "\t-f          run in foreground\n"
 225             "\t-m mode     specify socket permissions\n"
 226             "\t-n          do not listen for clients\n"
 227             "\t-s path     specify client socket pathname\n"
 228             "\t-h          display this message\n",
 229             getprogname());
 230
 231         exit(EXIT_FAILURE);
 232 }