1 /* $NetBSD: apmd.c,v 1.5 1997/03/01 19:10:49 jtk Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by John Kohl. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE 30 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <stdio.h> 40 #include <errno.h> 41 #include <syslog.h> 42 #include <fcntl.h> 43 #include <unistd.h> 44 #include <stdlib.h> 45 #include <string.h> 46 #include <signal.h> 47 #include <sys/types.h> 48 #include <pwd.h> 49 #include <grp.h> 50 #include <sys/stat.h> 51 #include <sys/ioctl.h> 52 #include <sys/time.h> 53 #include <sys/socket.h> 54 #include <sys/un.h> 55 #include <sys/wait.h> 56 #include <machine/apmvar.h> 57 #include <err.h> 58 #include "pathnames.h" 59 #include "apm-proto.h" 60 61 #define MAX(a,b) (a > b ? a : b) 62 #define TRUE 1 63 #define FALSE 0 64 65 const char apmdev[] = _PATH_APM_CTLDEV; 66 const char sockfile[] = _PATH_APM_SOCKET; 67 68 static int debug = 0; 69 70 extern char *__progname; 71 extern char *optarg; 72 extern int optind; 73 extern int optopt; 74 extern int opterr; 75 extern int optreset; 76 77 void usage (void); 78 int power_status (int fd, int force, struct apm_power_info *pinfo); 79 int bind_socket (const char *sn, mode_t mode, uid_t uid, gid_t gid); 80 enum apm_state handle_client(int sock_fd, int ctl_fd); 81 void suspend(int ctl_fd); 82 void stand_by(int ctl_fd); 83 void resume(int ctl_fd); 84 void sigexit(int signo); 85 void make_noise(int howmany); 86 void do_etc_file(const char *file); 87 88 void 89 sigexit(int signo) 90 { 91 exit(1); 92 } 93 94 void 95 usage(void) 96 { 97 fprintf(stderr,"usage: %s [-d] [-t timo] [-s] [-a] [-f devfile] [-S sockfile]\n\t[-m sockmode] [-o sockowner]\n", __progname); 98 exit(1); 99 } 100 101 102 int 103 power_status(int fd, int force, struct apm_power_info *pinfo) 104 { 105 struct apm_power_info bstate; 106 static struct apm_power_info last; 107 int acon = 0; 108 109 if (ioctl(fd, APM_IOC_GETPOWER, &bstate) == 0) { 110 /* various conditions under which we report status: something changed 111 enough since last report, or asked to force a print */ 112 if (bstate.ac_state == APM_AC_ON) 113 acon = 1; 114 if (force || 115 bstate.ac_state != last.ac_state || 116 bstate.battery_state != last.battery_state || 117 (bstate.minutes_left && bstate.minutes_left < 15) || 118 abs(bstate.battery_life - last.battery_life) > 20) { 119 if (bstate.minutes_left) 120 syslog(LOG_NOTICE, 121 "battery status: %s. external power status: %s. " 122 "estimated battery life %d%% (%d minutes)", 123 battstate(bstate.battery_state), 124 ac_state(bstate.ac_state), bstate.battery_life, 125 bstate.minutes_left); 126 else 127 syslog(LOG_NOTICE, 128 "battery status: %s. external power status: %s. " 129 "estimated battery life %d%%", 130 battstate(bstate.battery_state), 131 ac_state(bstate.ac_state), bstate.battery_life); 132 last = bstate; 133 } 134 if (pinfo) 135 *pinfo = bstate; 136 } else 137 syslog(LOG_ERR, "cannot fetch power status: %m"); 138 return acon; 139 } 140 141 static char *socketname; 142 143 static void sockunlink(void); 144 145 static void 146 sockunlink(void) 147 { 148 if (socketname) 149 (void) remove(socketname); 150 } 151 152 int 153 bind_socket(const char *sockname, mode_t mode, uid_t uid, gid_t gid) 154 { 155 int sock; 156 struct sockaddr_un s_un; 157 158 sock = socket(AF_UNIX, SOCK_STREAM, 0); 159 if (sock == -1) 160 err(1, "cannot create local socket"); 161 162 s_un.sun_family = AF_UNIX; 163 strncpy(s_un.sun_path, sockname, sizeof(s_un.sun_path)); 164 s_un.sun_len = SUN_LEN(&s_un); 165 /* remove it if present, we're moving in */ 166 (void) remove(sockname); 167 if (bind(sock, (struct sockaddr *)&s_un, s_un.sun_len) == -1) 168 err(1, "cannot create APM socket"); 169 if (chmod(sockname, mode) == -1 || chown(sockname, uid, gid) == -1) 170 err(1, "cannot set socket mode/owner/group to %o/%d/%d", 171 mode, uid, gid); 172 listen(sock, 1); 173 socketname = strdup(sockname); 174 atexit(sockunlink); 175 return sock; 176 } 177 178 enum apm_state 179 handle_client(int sock_fd, int ctl_fd) 180 { 181 /* accept a handle from the client, process it, then clean up */ 182 int cli_fd; 183 struct sockaddr_un from; 184 int fromlen = sizeof(from); 185 struct apm_command cmd; 186 struct apm_reply reply; 187 188 cli_fd = accept(sock_fd, (struct sockaddr *)&from, &fromlen); 189 if (cli_fd == -1) { 190 syslog(LOG_INFO, "client accept failure: %m"); 191 return NORMAL; 192 } 193 if (recv(cli_fd, &cmd, sizeof(cmd), 0) != sizeof(cmd)) { 194 (void) close(cli_fd); 195 syslog(LOG_INFO, "client size botch"); 196 return NORMAL; 197 } 198 if (cmd.vno != APMD_VNO) { 199 close(cli_fd); /* terminate client */ 200 /* no error message, just drop it. */ 201 return NORMAL; 202 } 203 power_status(ctl_fd, 0, &reply.batterystate); 204 switch (cmd.action) { 205 default: 206 reply.newstate = NORMAL; 207 break; 208 case SUSPEND: 209 reply.newstate = SUSPENDING; 210 break; 211 case STANDBY: 212 reply.newstate = STANDING_BY; 213 break; 214 } 215 reply.vno = APMD_VNO; 216 if (send(cli_fd, &reply, sizeof(reply), 0) != sizeof(reply)) { 217 syslog(LOG_INFO, "client reply botch"); 218 } 219 close(cli_fd); 220 return reply.newstate; 221 } 222 223 static int speaker_ok = TRUE; 224 225 void 226 make_noise(howmany) 227 int howmany; 228 { 229 int spkrfd; 230 int trycnt; 231 232 if (!speaker_ok) /* don't bother after sticky errors */ 233 return; 234 235 for (trycnt = 0; trycnt < 3; trycnt++) { 236 spkrfd = open(_PATH_DEV_SPEAKER, O_WRONLY); 237 if (spkrfd == -1) { 238 switch (errno) { 239 case EBUSY: 240 usleep(500000); 241 errno = EBUSY; 242 continue; 243 case ENOENT: 244 case ENODEV: 245 case ENXIO: 246 case EPERM: 247 case EACCES: 248 syslog(LOG_INFO, 249 "speaker device " _PATH_DEV_SPEAKER " unavailable: %m"); 250 speaker_ok = FALSE; 251 return; 252 } 253 } else 254 break; 255 } 256 if (spkrfd == -1) { 257 syslog(LOG_WARNING, "cannot open " _PATH_DEV_SPEAKER ": %m"); 258 return; 259 } 260 syslog(LOG_DEBUG, "sending %d tones to speaker\n", howmany); 261 write (spkrfd, "o4cc", 2 + howmany); 262 close(spkrfd); 263 return; 264 } 265 266 267 void 268 suspend(int ctl_fd) 269 { 270 do_etc_file(_PATH_APM_ETC_SUSPEND); 271 sync(); 272 make_noise(2); 273 sync(); 274 sync(); 275 sleep(1); 276 ioctl(ctl_fd, APM_IOC_SUSPEND, 0); 277 } 278 279 void 280 stand_by(int ctl_fd) 281 { 282 do_etc_file(_PATH_APM_ETC_STANDBY); 283 sync(); 284 make_noise(1); 285 sync(); 286 sync(); 287 sleep(1); 288 ioctl(ctl_fd, APM_IOC_STANDBY, 0); 289 } 290 291 #define TIMO (10*60) /* 10 minutes */ 292 293 void 294 resume(int ctl_fd) 295 { 296 do_etc_file(_PATH_APM_ETC_RESUME); 297 } 298 299 void 300 main(int argc, char *argv[]) 301 { 302 const char *fname = apmdev; 303 int ctl_fd, sock_fd, ch, ready; 304 int statonly = 0; 305 fd_set devfds; 306 fd_set selcopy; 307 struct apm_event_info apmevent; 308 int suspends, standbys, resumes; 309 int noacsleep = 0; 310 mode_t mode = 0660; 311 struct timeval tv = {TIMO, 0}, stv; 312 const char *sockname = sockfile; 313 char *user, *group; 314 char *scratch; 315 uid_t uid = 0; 316 gid_t gid = 0; 317 struct passwd *pw; 318 struct group *gr; 319 320 while ((ch = getopt(argc, argv, "qadsf:t:S:m:o:")) != -1) 321 switch(ch) { 322 case 'q': 323 speaker_ok = FALSE; 324 break; 325 case 'a': 326 noacsleep = 1; 327 break; 328 case 'd': 329 debug = 1; 330 break; 331 case 'f': 332 fname = optarg; 333 break; 334 case 'S': 335 sockname = optarg; 336 break; 337 case 't': 338 tv.tv_sec = strtoul(optarg, 0, 0); 339 if (tv.tv_sec == 0) 340 usage(); 341 break; 342 case 'm': 343 mode = strtoul(optarg, 0, 8); 344 if (mode == 0) 345 usage(); 346 break; 347 case 'o': 348 /* (user):(group) */ 349 user = optarg; 350 group = strchr(user, ':'); 351 if (group) 352 *group++ = '\0'; 353 if (*user) { 354 uid = strtoul(user, &scratch, 0); 355 if (*scratch != '\0') { 356 pw = getpwnam(user); 357 if (pw) 358 uid = pw->pw_uid; 359 else 360 errx(1, "user name `%s' unknown", user); 361 } 362 } 363 if (group && *group) { 364 gid = strtoul(group, &scratch, 0); 365 if (*scratch != '\0') { 366 gr = getgrnam(group); 367 if (gr) 368 gid = gr->gr_gid; 369 else 370 errx(1, "group name `%s' unknown", group); 371 } 372 } 373 break; 374 case 's': /* status only */ 375 statonly = 1; 376 break; 377 case '?': 378 379 default: 380 usage(); 381 } 382 argc -= optind; 383 argv += optind; 384 if ((ctl_fd = open(fname, O_RDWR)) == -1) { 385 (void)err(1, "cannot open device file `%s'", fname); 386 } 387 if (debug) { 388 openlog(__progname, LOG_CONS, LOG_LOCAL1); 389 } else { 390 openlog(__progname, LOG_CONS, LOG_DAEMON); 391 setlogmask(LOG_UPTO(LOG_NOTICE)); 392 daemon(0, 0); 393 } 394 power_status(ctl_fd, 1, 0); 395 if (statonly) 396 exit(0); 397 (void) signal(SIGTERM, sigexit); 398 (void) signal(SIGHUP, sigexit); 399 (void) signal(SIGINT, sigexit); 400 (void) signal(SIGPIPE, SIG_IGN); 401 402 sock_fd = bind_socket(sockname, mode, uid, gid); 403 404 FD_ZERO(&devfds); 405 FD_SET(ctl_fd, &devfds); 406 FD_SET(sock_fd, &devfds); 407 408 for (selcopy = devfds, errno = 0, stv = tv; 409 (ready = select(MAX(ctl_fd,sock_fd)+1, &selcopy, 0, 0, &stv)) >= 0 || 410 errno == EINTR; 411 selcopy = devfds, errno = 0, stv = tv) { 412 if (errno == EINTR) 413 continue; 414 if (ready == 0) { 415 /* wakeup for timeout: take status */ 416 power_status(ctl_fd, 0, 0); 417 } 418 if (FD_ISSET(ctl_fd, &selcopy)) { 419 suspends = standbys = resumes = 0; 420 while (ioctl(ctl_fd, APM_IOC_NEXTEVENT, &apmevent) == 0) { 421 syslog(LOG_DEBUG, "apmevent %04x index %d", apmevent.type, 422 apmevent.index); 423 switch (apmevent.type) { 424 case APM_SUSPEND_REQ: 425 case APM_USER_SUSPEND_REQ: 426 case APM_CRIT_SUSPEND_REQ: 427 case APM_BATTERY_LOW: 428 suspends++; 429 break; 430 case APM_USER_STANDBY_REQ: 431 case APM_STANDBY_REQ: 432 standbys++; 433 break; 434 #if 0 435 case APM_CANCEL: 436 suspends = standbys = 0; 437 break; 438 #endif 439 case APM_NORMAL_RESUME: 440 case APM_CRIT_RESUME: 441 case APM_SYS_STANDBY_RESUME: 442 resumes++; 443 break; 444 case APM_POWER_CHANGE: 445 power_status(ctl_fd, 1, 0); 446 break; 447 default: 448 break; 449 } 450 } 451 if ((standbys || suspends) && noacsleep && 452 power_status(ctl_fd, 0, 0)) { 453 syslog(LOG_DEBUG, "not sleeping cuz AC is connected"); 454 } else if (suspends) { 455 suspend(ctl_fd); 456 } else if (standbys) { 457 stand_by(ctl_fd); 458 } else if (resumes) { 459 resume(ctl_fd); 460 syslog(LOG_NOTICE, "system resumed from APM sleep"); 461 } 462 ready--; 463 } 464 if (ready == 0) 465 continue; 466 if (FD_ISSET(sock_fd, &selcopy)) { 467 switch (handle_client(sock_fd, ctl_fd)) { 468 case NORMAL: 469 break; 470 case SUSPENDING: 471 suspend(ctl_fd); 472 break; 473 case STANDING_BY: 474 stand_by(ctl_fd); 475 break; 476 } 477 } 478 } 479 syslog(LOG_ERR, "select failed: %m"); 480 exit(1); 481 } 482 483 void 484 do_etc_file(const char *file) 485 { 486 pid_t pid; 487 int status; 488 const char *prog; 489 490 /* If file doesn't exist, do nothing. */ 491 if (access(file, X_OK|R_OK)) { 492 syslog(LOG_DEBUG, "do_etc_file(): cannot access file %s", file); 493 return; 494 } 495 496 prog = strrchr(file, '/'); 497 if (prog) 498 prog++; 499 else 500 prog = file; 501 502 pid = fork(); 503 switch (pid) { 504 case -1: 505 syslog(LOG_ERR, "failed to fork(): %m"); 506 return; 507 case 0: 508 /* We are the child. */ 509 execl(file, prog, NULL); 510 _exit(-1); 511 /* NOTREACHED */ 512 default: 513 /* We are the parent. */ 514 wait4(pid, &status, 0, 0); 515 if (WIFEXITED(status)) 516 syslog(LOG_DEBUG, "%s exited with status %d", file, 517 WEXITSTATUS(status)); 518 else { 519 syslog(LOG_ERR, "%s exited abnormally.", file); 520 } 521 break; 522 } 523 } 524