1 /* $NetBSD: apmd.c,v 1.32 2011/11/25 12:51:27 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 2000 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <stdio.h> 33 #include <errno.h> 34 #include <syslog.h> 35 #include <fcntl.h> 36 #include <unistd.h> 37 #include <util.h> 38 #include <stdlib.h> 39 #include <string.h> 40 #include <signal.h> 41 #include <sys/types.h> 42 #include <pwd.h> 43 #include <grp.h> 44 #include <sys/stat.h> 45 #include <sys/ioctl.h> 46 #include <sys/time.h> 47 #include <sys/socket.h> 48 #include <sys/un.h> 49 #include <sys/wait.h> 50 #include <poll.h> 51 #include <machine/apmvar.h> 52 #include <err.h> 53 #include "pathnames.h" 54 #include "apm-proto.h" 55 56 #define TRUE 1 57 #define FALSE 0 58 59 #define POWER_STATUS_ACON 0x1 60 #define POWER_STATUS_LOWBATTNOW 0x2 61 62 static const char apmdev[] = _PATH_APM_CTLDEV; 63 static const char sockfile[] = _PATH_APM_SOCKET; 64 65 static int debug = 0; 66 static int verbose = 0; 67 68 __dead static void usage (void); 69 static int power_status (int fd, int force, struct apm_power_info *pinfo); 70 static int bind_socket (const char *sn, mode_t mode, uid_t uid, gid_t gid); 71 static enum apm_state handle_client(int sock_fd, int ctl_fd); 72 static void suspend(int ctl_fd); 73 static void stand_by(int ctl_fd); 74 static void resume(int ctl_fd); 75 __dead static void sigexit(int signo); 76 static void make_noise(int howmany); 77 static void do_etc_file(const char *file); 78 static void do_ac_state(int state); 79 80 static void 81 sigexit(int signo) 82 { 83 exit(1); 84 } 85 86 static void 87 usage(void) 88 { 89 fprintf(stderr,"usage: %s [-adlqsv] [-t seconds] [-S sockname]\n\t[-m sockmode] [-o sockowner:sockgroup] [-f devname]\n", getprogname()); 90 exit(1); 91 } 92 93 94 static int 95 power_status(int fd, int force, struct apm_power_info *pinfo) 96 { 97 struct apm_power_info bstate; 98 static struct apm_power_info last; 99 int acon = 0; 100 int lowbattnow = 0; 101 102 memset(&bstate, 0, sizeof(bstate)); 103 if (ioctl(fd, APM_IOC_GETPOWER, &bstate) == 0) { 104 /* various conditions under which we report status: something changed 105 enough since last report, or asked to force a print */ 106 if (bstate.ac_state == APM_AC_ON) 107 acon = 1; 108 if (bstate.battery_state != last.battery_state && 109 bstate.battery_state == APM_BATT_LOW) 110 lowbattnow = 1; 111 if (force || 112 bstate.ac_state != last.ac_state || 113 bstate.battery_state != last.battery_state || 114 (bstate.minutes_left && bstate.minutes_left < 15) || 115 abs(bstate.battery_life - last.battery_life) > 20) { 116 if (verbose) { 117 if (bstate.minutes_left) 118 syslog(LOG_NOTICE, 119 "battery status: %s. external power status: %s. " 120 "estimated battery life %d%% (%d minutes)", 121 battstate(bstate.battery_state), 122 ac_state(bstate.ac_state), bstate.battery_life, 123 bstate.minutes_left); 124 else 125 syslog(LOG_NOTICE, 126 "battery status: %s. external power status: %s. " 127 "estimated battery life %d%%", 128 battstate(bstate.battery_state), 129 ac_state(bstate.ac_state), bstate.battery_life); 130 } 131 last = bstate; 132 } 133 if (pinfo) 134 *pinfo = bstate; 135 } else 136 syslog(LOG_ERR, "cannot fetch power status: %m"); 137 return ((acon?POWER_STATUS_ACON:0) | 138 (lowbattnow?POWER_STATUS_LOWBATTNOW:0)); 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 static 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_LOCAL, SOCK_STREAM, 0); 159 if (sock == -1) 160 err(1, "cannot create local socket"); 161 162 s_un.sun_family = AF_LOCAL; 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 static 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 socklen_t 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 static void 226 make_noise(int howmany) 227 { 228 int spkrfd; 229 int trycnt; 230 231 if (!speaker_ok) /* don't bother after sticky errors */ 232 return; 233 234 for (trycnt = 0; trycnt < 3; trycnt++) { 235 spkrfd = open(_PATH_DEV_SPEAKER, O_WRONLY); 236 if (spkrfd == -1) { 237 switch (errno) { 238 case EBUSY: 239 usleep(500000); 240 errno = EBUSY; 241 continue; 242 case ENOENT: 243 case ENODEV: 244 case ENXIO: 245 case EPERM: 246 case EACCES: 247 syslog(LOG_INFO, 248 "speaker device " _PATH_DEV_SPEAKER " unavailable: %m"); 249 speaker_ok = FALSE; 250 return; 251 } 252 } else 253 break; 254 } 255 if (spkrfd == -1) { 256 syslog(LOG_WARNING, "cannot open " _PATH_DEV_SPEAKER ": %m"); 257 return; 258 } 259 syslog(LOG_DEBUG, "sending %d tones to speaker\n", howmany); 260 write (spkrfd, "o4cc", 2 + howmany); 261 close(spkrfd); 262 return; 263 } 264 265 266 static void 267 suspend(int ctl_fd) 268 { 269 do_etc_file(_PATH_APM_ETC_SUSPEND); 270 sync(); 271 make_noise(2); 272 sync(); 273 sync(); 274 sleep(1); 275 ioctl(ctl_fd, APM_IOC_SUSPEND, 0); 276 } 277 278 static void 279 stand_by(int ctl_fd) 280 { 281 do_etc_file(_PATH_APM_ETC_STANDBY); 282 sync(); 283 make_noise(1); 284 sync(); 285 sync(); 286 sleep(1); 287 ioctl(ctl_fd, APM_IOC_STANDBY, 0); 288 } 289 290 #define TIMO (10*60) /* 10 minutes */ 291 292 static void 293 resume(int ctl_fd) 294 { 295 do_etc_file(_PATH_APM_ETC_RESUME); 296 } 297 298 int 299 main(int argc, char *argv[]) 300 { 301 const char *fname = apmdev; 302 int ctl_fd, sock_fd, ch, ready; 303 int statonly = 0; 304 struct pollfd set[2]; 305 struct apm_event_info apmevent; 306 int suspends, standbys, resumes; 307 int ac_is_off; 308 int noacsleep = 0; 309 int lowbattsleep = 0; 310 mode_t mode = 0660; 311 unsigned long timeout = TIMO; 312 const char *sockname = sockfile; 313 char *user, *group; 314 char *scratch; 315 uid_t uid = 2; /* operator */ 316 gid_t gid = 5; /* operator */ 317 struct passwd *pw; 318 struct group *gr; 319 320 while ((ch = getopt(argc, argv, "adlqsvf: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 'l': 329 lowbattsleep = 1; 330 break; 331 case 'd': 332 debug = 1; 333 break; 334 case 'v': 335 verbose = 1; 336 break; 337 case 'f': 338 fname = optarg; 339 break; 340 case 'S': 341 sockname = optarg; 342 break; 343 case 't': 344 timeout = strtoul(optarg, 0, 0); 345 if (timeout == 0) 346 usage(); 347 break; 348 case 'm': 349 mode = strtoul(optarg, 0, 8); 350 if (mode == 0) 351 usage(); 352 break; 353 case 'o': 354 /* (user):(group) */ 355 user = optarg; 356 group = strchr(user, ':'); 357 if (group) 358 *group++ = '\0'; 359 if (*user) { 360 uid = strtoul(user, &scratch, 0); 361 if (*scratch != '\0') { 362 pw = getpwnam(user); 363 if (pw) 364 uid = pw->pw_uid; 365 else 366 errx(1, "user name `%s' unknown", user); 367 } 368 } 369 if (group && *group) { 370 gid = strtoul(group, &scratch, 0); 371 if (*scratch != '\0') { 372 gr = getgrnam(group); 373 if (gr) 374 gid = gr->gr_gid; 375 else 376 errx(1, "group name `%s' unknown", group); 377 } 378 } 379 break; 380 case 's': /* status only */ 381 statonly = 1; 382 break; 383 case '?': 384 385 default: 386 usage(); 387 } 388 argc -= optind; 389 argv += optind; 390 if (debug) { 391 openlog("apmd", 0, LOG_LOCAL1); 392 } else { 393 daemon(0, 0); 394 openlog("apmd", 0, LOG_DAEMON); 395 setlogmask(LOG_UPTO(LOG_NOTICE)); 396 pidfile(NULL); 397 } 398 if ((ctl_fd = open(fname, O_RDWR)) == -1) { 399 syslog(LOG_ERR, "cannot open device file `%s'", fname); 400 exit(1); 401 } 402 403 if (statonly) { 404 power_status(ctl_fd, 1, 0); 405 exit(0); 406 } else { 407 struct apm_power_info pinfo; 408 power_status(ctl_fd, 1, &pinfo); 409 do_ac_state(pinfo.ac_state); 410 ac_is_off = (pinfo.ac_state == APM_AC_OFF); 411 } 412 413 (void) signal(SIGTERM, sigexit); 414 (void) signal(SIGHUP, sigexit); 415 (void) signal(SIGINT, sigexit); 416 (void) signal(SIGPIPE, SIG_IGN); 417 418 419 sock_fd = bind_socket(sockname, mode, uid, gid); 420 421 set[0].fd = ctl_fd; 422 set[0].events = POLLIN; 423 set[1].fd = sock_fd; 424 set[1].events = POLLIN; 425 426 427 for (errno = 0; 428 (ready = poll(set, 2, timeout * 1000)) >= 0 || errno == EINTR; 429 errno = 0) { 430 if (errno == EINTR) 431 continue; 432 if (ready == 0) { 433 int status; 434 /* wakeup for timeout: take status */ 435 status = power_status(ctl_fd, 0, 0); 436 if (lowbattsleep && status&POWER_STATUS_LOWBATTNOW) { 437 if (noacsleep && status&POWER_STATUS_ACON) { 438 if (debug) 439 syslog(LOG_DEBUG, 440 "not sleeping because " 441 "AC is connected"); 442 } else 443 suspend(ctl_fd); 444 } 445 } 446 if (set[0].revents & POLLIN) { 447 suspends = standbys = resumes = 0; 448 while (ioctl(ctl_fd, APM_IOC_NEXTEVENT, &apmevent) == 0) { 449 if (debug) 450 syslog(LOG_DEBUG, "apmevent %04x index %d", apmevent.type, 451 apmevent.index); 452 switch (apmevent.type) { 453 case APM_SUSPEND_REQ: 454 case APM_USER_SUSPEND_REQ: 455 case APM_CRIT_SUSPEND_REQ: 456 suspends++; 457 break; 458 case APM_BATTERY_LOW: 459 if (lowbattsleep) 460 suspends++; 461 break; 462 case APM_USER_STANDBY_REQ: 463 case APM_STANDBY_REQ: 464 standbys++; 465 break; 466 #if 0 467 case APM_CANCEL: 468 suspends = standbys = 0; 469 break; 470 #endif 471 case APM_NORMAL_RESUME: 472 case APM_CRIT_RESUME: 473 case APM_SYS_STANDBY_RESUME: 474 resumes++; 475 break; 476 case APM_POWER_CHANGE: 477 { 478 struct apm_power_info pinfo; 479 power_status(ctl_fd, 0, &pinfo); 480 /* power status can change without ac status changing */ 481 if (ac_is_off != (pinfo.ac_state == APM_AC_OFF)) { 482 do_ac_state(pinfo.ac_state); 483 ac_is_off = (pinfo.ac_state == APM_AC_OFF); 484 } 485 break; 486 } 487 default: 488 break; 489 } 490 } 491 if ((standbys || suspends) && noacsleep && 492 (power_status(ctl_fd, 0, 0) & POWER_STATUS_ACON)) { 493 if (debug) 494 syslog(LOG_DEBUG, "not sleeping because AC is connected"); 495 } else if (suspends) { 496 suspend(ctl_fd); 497 } else if (standbys) { 498 stand_by(ctl_fd); 499 } else if (resumes) { 500 resume(ctl_fd); 501 if (verbose) 502 syslog(LOG_NOTICE, "system resumed from APM sleep"); 503 } 504 ready--; 505 } 506 if (ready == 0) 507 continue; 508 if (set[1].revents & POLLIN) { 509 switch (handle_client(sock_fd, ctl_fd)) { 510 case NORMAL: 511 break; 512 case SUSPENDING: 513 suspend(ctl_fd); 514 break; 515 case STANDING_BY: 516 stand_by(ctl_fd); 517 break; 518 } 519 } 520 } 521 syslog(LOG_ERR, "poll failed: %m"); 522 exit(1); 523 } 524 525 static void 526 do_etc_file(const char *file) 527 { 528 pid_t pid; 529 int status; 530 const char *prog; 531 532 /* If file doesn't exist, do nothing. */ 533 if (access(file, X_OK|R_OK)) { 534 if (debug) 535 syslog(LOG_DEBUG, "do_etc_file(): cannot access file %s", file); 536 return; 537 } 538 539 prog = strrchr(file, '/'); 540 if (prog) 541 prog++; 542 else 543 prog = file; 544 545 pid = fork(); 546 switch (pid) { 547 case -1: 548 syslog(LOG_ERR, "failed to fork(): %m"); 549 return; 550 case 0: 551 /* We are the child. */ 552 if (execl(file, prog, NULL) == -1) 553 syslog(LOG_ERR, "could not execute \"%s\": %m", file); 554 _exit(1); 555 /* NOTREACHED */ 556 default: 557 /* We are the parent. */ 558 wait4(pid, &status, 0, 0); 559 if (WIFEXITED(status)) { 560 if (debug) 561 syslog(LOG_DEBUG, "%s exited with status %d", file, 562 WEXITSTATUS(status)); 563 } else 564 syslog(LOG_ERR, "%s exited abnormally.", file); 565 break; 566 } 567 } 568 569 static void 570 do_ac_state(int state) 571 { 572 switch (state) { 573 case APM_AC_OFF: 574 do_etc_file(_PATH_APM_ETC_BATTERY); 575 break; 576 case APM_AC_ON: 577 case APM_AC_BACKUP: 578 do_etc_file(_PATH_APM_ETC_LINE); 579 break; 580 default: 581 /* Silently ignore */ ; 582 } 583 } 584
Indexes created Sat Sep 20 22:09:52 GMT 2025