1 /* $OpenBSD: apmd.c,v 1.22 2001/12/12 17:03:39 mickey Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 John T. Kohl 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 27 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 * 30 */ 31 32 #include <sys/types.h> 33 #include <sys/stat.h> 34 #include <sys/ioctl.h> 35 #include <sys/socket.h> 36 #include <sys/un.h> 37 #include <sys/wait.h> 38 #include <sys/event.h> 39 #include <sys/time.h> 40 #include <stdio.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 <errno.h> 48 #include <err.h> 49 #include <machine/apmvar.h> 50 #include "pathnames.h" 51 #include "apm-proto.h" 52 53 #define MAX(a,b) (a > b ? a : b) 54 #define TRUE 1 55 #define FALSE 0 56 57 const char apmdev[] = _PATH_APM_CTLDEV; 58 const char sockfile[] = _PATH_APM_SOCKET; 59 60 int debug = 0; 61 62 extern char *__progname; 63 64 void usage (void); 65 int power_status (int fd, int force, struct apm_power_info *pinfo); 66 int bind_socket (const char *sn); 67 enum apm_state handle_client(int sock_fd, int ctl_fd); 68 void suspend(int ctl_fd); 69 void stand_by(int ctl_fd); 70 void sigexit(int signo); 71 void make_noise(int howmany); 72 void do_etc_file(const char *file); 73 74 void 75 sigexit(int signo) 76 { 77 _exit(1); 78 } 79 80 void 81 usage(void) 82 { 83 fprintf(stderr, 84 "usage: %s [-adempqs] [-f devfile] [-S sockfile] [-t timo]\n", 85 __progname); 86 exit(1); 87 } 88 89 void 90 error(const char *fmt, const char *arg) 91 { 92 char buf[128]; 93 94 if (debug) 95 err(1, fmt, arg); 96 else { 97 strlcpy(buf, fmt, sizeof(buf)); 98 strlcat(buf, ": %m", sizeof(buf)); 99 syslog(LOG_ERR, buf, arg); 100 exit(1); 101 } 102 } 103 104 105 /* 106 * tell the driver if it should display messages or not. 107 */ 108 void 109 set_driver_messages(int fd, int mode) 110 { 111 if (ioctl(fd, APM_IOC_PRN_CTL, &mode) == -1) 112 syslog(LOG_DEBUG, "can't disable driver messages, error: %m"); 113 } 114 115 int 116 power_status(int fd, int force, struct apm_power_info *pinfo) 117 { 118 struct apm_power_info bstate; 119 static struct apm_power_info last; 120 int acon = 0; 121 122 if (ioctl(fd, APM_IOC_GETPOWER, &bstate) == 0) { 123 /* various conditions under which we report status: something changed 124 * enough since last report, or asked to force a print */ 125 if (bstate.ac_state == APM_AC_ON) 126 acon = 1; 127 if (force || 128 bstate.ac_state != last.ac_state || 129 bstate.battery_state != last.battery_state || 130 (bstate.minutes_left && bstate.minutes_left < 15) || 131 abs(bstate.battery_life - last.battery_life) > 20) { 132 #ifdef __powerpc__ 133 /* 134 * When the battery is charging, the estimated life 135 * time is in fact the estimated remaining charge time 136 * on Apple machines, so lie in the stats. 137 * We still want an useful message if the battery or 138 * ac status changes, however. 139 */ 140 if (bstate.minutes_left != 0 && 141 bstate.battery_state != APM_BATT_CHARGING) 142 #else 143 if (bstate.minutes_left) 144 #endif 145 syslog(LOG_NOTICE, "battery status: %s. " 146 "external power status: %s. " 147 "estimated battery life %d%% (%u minutes)", 148 battstate(bstate.battery_state), 149 ac_state(bstate.ac_state), 150 bstate.battery_life, 151 bstate.minutes_left); 152 else 153 syslog(LOG_NOTICE, "battery status: %s. " 154 "external power status: %s. " 155 "estimated battery life %d%%", 156 battstate(bstate.battery_state), 157 ac_state(bstate.ac_state), 158 bstate.battery_life); 159 last = bstate; 160 } 161 if (pinfo) 162 *pinfo = bstate; 163 } else 164 syslog(LOG_ERR, "cannot fetch power status: %m"); 165 166 return acon; 167 } 168 169 char *socketname; 170 171 void 172 sockunlink(void) 173 { 174 if (socketname) 175 remove(socketname); 176 } 177 178 int 179 bind_socket(const char *sockname) 180 { 181 struct sockaddr_un s_un; 182 int sock; 183 184 sock = socket(AF_UNIX, SOCK_STREAM, 0); 185 if (sock == -1) 186 error("cannot create local socket", NULL); 187 188 s_un.sun_family = AF_UNIX; 189 strncpy(s_un.sun_path, sockname, sizeof(s_un.sun_path)); 190 s_un.sun_len = SUN_LEN(&s_un); 191 192 /* remove it if present, we're moving in */ 193 (void) remove(sockname); 194 umask (077); 195 196 if (bind(sock, (struct sockaddr *)&s_un, s_un.sun_len) == -1) 197 error("cannot connect to APM socket", NULL); 198 if (chmod(sockname, 0660) == -1 || chown(sockname, 0, 0) == -1) 199 error("cannot set socket mode/owner/group to 660/0/0", NULL); 200 201 listen(sock, 1); 202 socketname = strdup(sockname); 203 atexit(sockunlink); 204 205 return sock; 206 } 207 208 enum apm_state 209 handle_client(int sock_fd, int ctl_fd) 210 { 211 /* accept a handle from the client, process it, then clean up */ 212 int cli_fd; 213 struct sockaddr_un from; 214 int fromlen; 215 struct apm_command cmd; 216 struct apm_reply reply; 217 218 cli_fd = accept(sock_fd, (struct sockaddr *)&from, &fromlen); 219 if (cli_fd == -1) { 220 syslog(LOG_INFO, "client accept failure: %m"); 221 return NORMAL; 222 } 223 224 if (recv(cli_fd, &cmd, sizeof(cmd), 0) != sizeof(cmd)) { 225 (void) close(cli_fd); 226 syslog(LOG_INFO, "client size botch"); 227 return NORMAL; 228 } 229 230 if (cmd.vno != APMD_VNO) { 231 close(cli_fd); /* terminate client */ 232 /* no error message, just drop it. */ 233 return NORMAL; 234 } 235 236 power_status(ctl_fd, 0, &reply.batterystate); 237 switch (cmd.action) { 238 case SUSPEND: reply.newstate = SUSPENDING; break; 239 case STANDBY: reply.newstate = STANDING_BY; break; 240 default: reply.newstate = NORMAL; break; 241 } 242 243 reply.vno = APMD_VNO; 244 if (send(cli_fd, &reply, sizeof(reply), 0) != sizeof(reply)) 245 syslog(LOG_INFO, "client reply botch"); 246 close(cli_fd); 247 248 return reply.newstate; 249 } 250 251 int speaker_ok = TRUE; 252 253 void 254 make_noise(howmany) 255 int howmany; 256 { 257 int spkrfd = -1; 258 int trycnt; 259 260 if (!speaker_ok) /* don't bother after sticky errors */ 261 return; 262 263 for (trycnt = 0; trycnt < 3; trycnt++) { 264 spkrfd = open(_PATH_DEV_SPEAKER, O_WRONLY); 265 if (spkrfd == -1) { 266 switch (errno) { 267 case EBUSY: 268 usleep(500000); 269 errno = EBUSY; 270 continue; 271 case ENOENT: 272 case ENODEV: 273 case ENXIO: 274 case EPERM: 275 case EACCES: 276 syslog(LOG_WARNING, "speaker device " 277 _PATH_DEV_SPEAKER " unavailable: %m"); 278 speaker_ok = FALSE; 279 return; 280 } 281 } else 282 break; 283 } 284 285 if (spkrfd == -1) { 286 syslog(LOG_WARNING, "cannot open " _PATH_DEV_SPEAKER ": %m"); 287 return; 288 } 289 290 syslog(LOG_DEBUG, "sending %d tones to speaker", howmany); 291 write(spkrfd, "o4cc", 2 + howmany); 292 close(spkrfd); 293 } 294 295 void 296 suspend(int ctl_fd) 297 { 298 do_etc_file(_PATH_APM_ETC_SUSPEND); 299 sync(); 300 make_noise(2); 301 sync(); 302 sync(); 303 sleep(1); 304 ioctl(ctl_fd, APM_IOC_SUSPEND, 0); 305 } 306 307 void 308 stand_by(int ctl_fd) 309 { 310 do_etc_file(_PATH_APM_ETC_STANDBY); 311 sync(); 312 make_noise(1); 313 sync(); 314 sync(); 315 sleep(1); 316 ioctl(ctl_fd, APM_IOC_STANDBY, 0); 317 } 318 319 #define TIMO (1*60) /* 10 minutes */ 320 321 int 322 main(int argc, char *argv[]) 323 { 324 const char *fname = apmdev; 325 int ctl_fd, sock_fd, ch, suspends, standbys, resumes; 326 int statonly = 0; 327 int enableonly = 0; 328 int pctonly = 0; 329 int powerstatus = 0, powerbak = 0, powerchange = 0; 330 int messages = 0; 331 int noacsleep = 0; 332 struct timespec ts = {TIMO, 0}, sts = {0, 0}; 333 const char *sockname = sockfile; 334 int kq; 335 struct kevent ev[2]; 336 337 while ((ch = getopt(argc, argv, "qadsepmf:t:S:")) != -1) 338 switch(ch) { 339 case 'q': 340 speaker_ok = FALSE; 341 break; 342 case 'a': 343 noacsleep = 1; 344 break; 345 case 'd': 346 debug = 1; 347 break; 348 case 'f': 349 fname = optarg; 350 break; 351 case 'S': 352 sockname = optarg; 353 break; 354 case 't': 355 ts.tv_sec = strtoul(optarg, NULL, 0); 356 if (ts.tv_sec == 0) 357 usage(); 358 break; 359 case 's': /* status only */ 360 statonly = 1; 361 break; 362 case 'e': 363 enableonly = 1; 364 break; 365 case 'p': 366 pctonly = 1; 367 break; 368 case 'm': 369 messages = 1; 370 break; 371 case '?': 372 default: 373 usage(); 374 } 375 376 argc -= optind; 377 argv += optind; 378 379 if (debug) 380 openlog(__progname, LOG_CONS, LOG_LOCAL1); 381 else { 382 daemon(0, 0); 383 openlog(__progname, LOG_CONS, LOG_DAEMON); 384 setlogmask(LOG_UPTO(LOG_NOTICE)); 385 } 386 387 (void) signal(SIGTERM, sigexit); 388 (void) signal(SIGHUP, sigexit); 389 (void) signal(SIGINT, sigexit); 390 391 if ((ctl_fd = open(fname, O_RDWR)) == -1) 392 error("cannot open device file `%s'", fname); 393 394 sock_fd = bind_socket(sockname); 395 396 power_status(ctl_fd, 1, 0); 397 398 if (statonly) 399 exit(0); 400 401 if (enableonly) { 402 set_driver_messages(ctl_fd, APM_PRINT_ON); 403 exit(0); 404 } 405 406 if (pctonly) { 407 set_driver_messages(ctl_fd, APM_PRINT_PCT); 408 exit(0); 409 } 410 411 if (!messages) 412 set_driver_messages(ctl_fd, APM_PRINT_OFF); 413 414 kq = kqueue(); 415 if (kq <= 0) 416 error("kqueue", NULL); 417 418 EV_SET(&ev[0], ctl_fd, EVFILT_READ, EV_ADD | EV_ENABLE | EV_CLEAR, 419 0, 0, NULL); 420 EV_SET(&ev[1], sock_fd, EVFILT_READ, EV_ADD | EV_ENABLE | EV_CLEAR, 421 0, 0, NULL); 422 if (kevent(kq, ev, 2, NULL, 0, &sts) < 0) 423 error("kevent", NULL); 424 425 for (;;) { 426 int rv; 427 428 sts = ts; 429 430 if ((rv = kevent(kq, NULL, 0, ev, 1, &sts)) < 0) 431 break; 432 433 /* wakeup for timeout: take status */ 434 powerbak = power_status(ctl_fd, 0, 0); 435 if (powerstatus != powerbak) { 436 powerstatus = powerbak; 437 powerchange = 1; 438 } 439 440 if (!rv) 441 continue; 442 443 if (ev->ident == ctl_fd) { 444 suspends = standbys = resumes = 0; 445 syslog(LOG_DEBUG, "apmevent %04x index %d", 446 APM_EVENT_TYPE(ev->data), 447 APM_EVENT_INDEX(ev->data)); 448 449 switch (APM_EVENT_TYPE(ev->data)) { 450 case APM_SUSPEND_REQ: 451 case APM_USER_SUSPEND_REQ: 452 case APM_CRIT_SUSPEND_REQ: 453 case APM_BATTERY_LOW: 454 suspends++; 455 break; 456 case APM_USER_STANDBY_REQ: 457 case APM_STANDBY_REQ: 458 standbys++; 459 break; 460 #if 0 461 case APM_CANCEL: 462 suspends = standbys = 0; 463 break; 464 #endif 465 case APM_NORMAL_RESUME: 466 case APM_CRIT_RESUME: 467 case APM_SYS_STANDBY_RESUME: 468 powerbak = power_status(ctl_fd, 0, 0); 469 if (powerstatus != powerbak) { 470 powerstatus = powerbak; 471 powerchange = 1; 472 } 473 resumes++; 474 break; 475 case APM_POWER_CHANGE: 476 powerbak = power_status(ctl_fd, 0, 0); 477 if (powerstatus != powerbak) { 478 powerstatus = powerbak; 479 powerchange = 1; 480 } 481 break; 482 default: 483 } 484 485 if ((standbys || suspends) && noacsleep && 486 power_status(ctl_fd, 0, 0)) 487 syslog(LOG_DEBUG, "no! sleep! till brooklyn!"); 488 else if (suspends) 489 suspend(ctl_fd); 490 else if (standbys) 491 stand_by(ctl_fd); 492 else if (resumes) { 493 do_etc_file(_PATH_APM_ETC_RESUME); 494 syslog(LOG_NOTICE, 495 "system resumed from APM sleep"); 496 } 497 498 if (powerchange) { 499 if (powerstatus) 500 do_etc_file(_PATH_APM_ETC_POWERUP); 501 else 502 do_etc_file(_PATH_APM_ETC_POWERDOWN); 503 powerchange = 0; 504 } 505 506 } else if (ev->ident == sock_fd) 507 switch (handle_client(sock_fd, ctl_fd)) { 508 case NORMAL: 509 break; 510 case SUSPENDING: 511 suspend(ctl_fd); 512 break; 513 case STANDING_BY: 514 stand_by(ctl_fd); 515 break; 516 } 517 } 518 error("kevent loop", NULL); 519 520 return 1; 521 } 522 523 void 524 do_etc_file(const char *file) 525 { 526 pid_t pid; 527 int status; 528 const char *prog; 529 530 /* If file doesn't exist, do nothing. */ 531 if (access(file, X_OK|R_OK)) { 532 syslog(LOG_DEBUG, "do_etc_file(): cannot access file %s", file); 533 return; 534 } 535 536 prog = strrchr(file, '/'); 537 if (prog) 538 prog++; 539 else 540 prog = file; 541 542 pid = fork(); 543 switch (pid) { 544 case -1: 545 syslog(LOG_ERR, "failed to fork(): %m"); 546 return; 547 case 0: 548 /* We are the child. */ 549 execl(file, prog, (char *)NULL); 550 _exit(1); 551 /* NOTREACHED */ 552 default: 553 /* We are the parent. */ 554 wait4(pid, &status, 0, 0); 555 if (WIFEXITED(status)) 556 syslog(LOG_DEBUG, "%s exited with status %d", file, 557 WEXITSTATUS(status)); 558 else 559 syslog(LOG_ERR, "%s exited abnormally.", file); 560 } 561 } 562