apmd.c revision 1.10
1 /* $NetBSD: apmd.c,v 1.10 1998/12/19 15:27:58 christos 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 FOUNDATION OR CONTRIBUTORS 30 * BE 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 72 void usage (void); 73 int power_status (int fd, int force, struct apm_power_info *pinfo); 74 int bind_socket (const char *sn, mode_t mode, uid_t uid, gid_t gid); 75 enum apm_state handle_client(int sock_fd, int ctl_fd); 76 void suspend(int ctl_fd); 77 void stand_by(int ctl_fd); 78 void resume(int ctl_fd); 79 void sigexit(int signo); 80 void make_noise(int howmany); 81 void do_etc_file(const char *file); 82 void do_ac_state(int state); 83 84 void 85 sigexit(int signo) 86 { 87 exit(1); 88 } 89 90 void 91 usage(void) 92 { 93 fprintf(stderr,"usage: %s [-d] [-s] [-a] [-l] [-q] [-t seconds] [-S sockname]\n\t[-m sockmode] [-o sockowner:sockgroup] [-f devname]\n", __progname); 94 exit(1); 95 } 96 97 98 int 99 power_status(int fd, int force, struct apm_power_info *pinfo) 100 { 101 struct apm_power_info bstate; 102 static struct apm_power_info last; 103 int acon = 0; 104 105 if (ioctl(fd, APM_IOC_GETPOWER, &bstate) == 0) { 106 /* various conditions under which we report status: something changed 107 enough since last report, or asked to force a print */ 108 if (bstate.ac_state == APM_AC_ON) 109 acon = 1; 110 if (force || 111 bstate.ac_state != last.ac_state || 112 bstate.battery_state != last.battery_state || 113 (bstate.minutes_left && bstate.minutes_left < 15) || 114 abs(bstate.battery_life - last.battery_life) > 20) { 115 if (bstate.minutes_left) 116 syslog(LOG_NOTICE, 117 "battery status: %s. external power status: %s. " 118 "estimated battery life %d%% (%d minutes)", 119 battstate(bstate.battery_state), 120 ac_state(bstate.ac_state), bstate.battery_life, 121 bstate.minutes_left); 122 else 123 syslog(LOG_NOTICE, 124 "battery status: %s. external power status: %s. " 125 "estimated battery life %d%%", 126 battstate(bstate.battery_state), 127 ac_state(bstate.ac_state), bstate.battery_life); 128 last = bstate; 129 } 130 if (pinfo) 131 *pinfo = bstate; 132 } else 133 syslog(LOG_ERR, "cannot fetch power status: %m"); 134 return acon; 135 } 136 137 static char *socketname; 138 139 static void sockunlink(void); 140 141 static void 142 sockunlink(void) 143 { 144 if (socketname) 145 (void) remove(socketname); 146 } 147 148 int 149 bind_socket(const char *sockname, mode_t mode, uid_t uid, gid_t gid) 150 { 151 int sock; 152 struct sockaddr_un s_un; 153 154 sock = socket(AF_LOCAL, SOCK_STREAM, 0); 155 if (sock == -1) 156 err(1, "cannot create local socket"); 157 158 s_un.sun_family = AF_LOCAL; 159 strncpy(s_un.sun_path, sockname, sizeof(s_un.sun_path)); 160 s_un.sun_len = SUN_LEN(&s_un); 161 /* remove it if present, we're moving in */ 162 (void) remove(sockname); 163 if (bind(sock, (struct sockaddr *)&s_un, s_un.sun_len) == -1) 164 err(1, "cannot create APM socket"); 165 if (chmod(sockname, mode) == -1 || chown(sockname, uid, gid) == -1) 166 err(1, "cannot set socket mode/owner/group to %o/%d/%d", 167 mode, uid, gid); 168 listen(sock, 1); 169 socketname = strdup(sockname); 170 atexit(sockunlink); 171 return sock; 172 } 173 174 enum apm_state 175 handle_client(int sock_fd, int ctl_fd) 176 { 177 /* accept a handle from the client, process it, then clean up */ 178 int cli_fd; 179 struct sockaddr_un from; 180 int fromlen = sizeof(from); 181 struct apm_command cmd; 182 struct apm_reply reply; 183 184 cli_fd = accept(sock_fd, (struct sockaddr *)&from, &fromlen); 185 if (cli_fd == -1) { 186 syslog(LOG_INFO, "client accept failure: %m"); 187 return NORMAL; 188 } 189 if (recv(cli_fd, &cmd, sizeof(cmd), 0) != sizeof(cmd)) { 190 (void) close(cli_fd); 191 syslog(LOG_INFO, "client size botch"); 192 return NORMAL; 193 } 194 if (cmd.vno != APMD_VNO) { 195 close(cli_fd); /* terminate client */ 196 /* no error message, just drop it. */ 197 return NORMAL; 198 } 199 power_status(ctl_fd, 0, &reply.batterystate); 200 switch (cmd.action) { 201 default: 202 reply.newstate = NORMAL; 203 break; 204 case SUSPEND: 205 reply.newstate = SUSPENDING; 206 break; 207 case STANDBY: 208 reply.newstate = STANDING_BY; 209 break; 210 } 211 reply.vno = APMD_VNO; 212 if (send(cli_fd, &reply, sizeof(reply), 0) != sizeof(reply)) { 213 syslog(LOG_INFO, "client reply botch"); 214 } 215 close(cli_fd); 216 return reply.newstate; 217 } 218 219 static int speaker_ok = TRUE; 220 221 void 222 make_noise(howmany) 223 int howmany; 224 { 225 int spkrfd; 226 int trycnt; 227 228 if (!speaker_ok) /* don't bother after sticky errors */ 229 return; 230 231 for (trycnt = 0; trycnt < 3; trycnt++) { 232 spkrfd = open(_PATH_DEV_SPEAKER, O_WRONLY); 233 if (spkrfd == -1) { 234 switch (errno) { 235 case EBUSY: 236 usleep(500000); 237 errno = EBUSY; 238 continue; 239 case ENOENT: 240 case ENODEV: 241 case ENXIO: 242 case EPERM: 243 case EACCES: 244 syslog(LOG_INFO, 245 "speaker device " _PATH_DEV_SPEAKER " unavailable: %m"); 246 speaker_ok = FALSE; 247 return; 248 } 249 } else 250 break; 251 } 252 if (spkrfd == -1) { 253 syslog(LOG_WARNING, "cannot open " _PATH_DEV_SPEAKER ": %m"); 254 return; 255 } 256 syslog(LOG_DEBUG, "sending %d tones to speaker\n", howmany); 257 write (spkrfd, "o4cc", 2 + howmany); 258 close(spkrfd); 259 return; 260 } 261 262 263 void 264 suspend(int ctl_fd) 265 { 266 do_etc_file(_PATH_APM_ETC_SUSPEND); 267 sync(); 268 make_noise(2); 269 sync(); 270 sync(); 271 sleep(1); 272 ioctl(ctl_fd, APM_IOC_SUSPEND, 0); 273 } 274 275 void 276 stand_by(int ctl_fd) 277 { 278 do_etc_file(_PATH_APM_ETC_STANDBY); 279 sync(); 280 make_noise(1); 281 sync(); 282 sync(); 283 sleep(1); 284 ioctl(ctl_fd, APM_IOC_STANDBY, 0); 285 } 286 287 #define TIMO (10*60) /* 10 minutes */ 288 289 void 290 resume(int ctl_fd) 291 { 292 do_etc_file(_PATH_APM_ETC_RESUME); 293 } 294 295 int 296 main(int argc, char *argv[]) 297 { 298 const char *fname = apmdev; 299 int ctl_fd, sock_fd, ch, ready; 300 int statonly = 0; 301 fd_set devfds; 302 fd_set selcopy; 303 struct apm_event_info apmevent; 304 int suspends, standbys, resumes; 305 int noacsleep = 0; 306 int lowbattsleep = 0; 307 mode_t mode = 0660; 308 struct timeval tv = {TIMO, 0}, stv; 309 const char *sockname = sockfile; 310 char *user, *group; 311 char *scratch; 312 uid_t uid = 0; 313 gid_t gid = 0; 314 struct passwd *pw; 315 struct group *gr; 316 317 while ((ch = getopt(argc, argv, "qadsf:t:S:m:o:")) != -1) 318 switch(ch) { 319 case 'q': 320 speaker_ok = FALSE; 321 break; 322 case 'a': 323 noacsleep = 1; 324 break; 325 case 'l': 326 lowbattsleep = 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 if (statonly) { 395 power_status(ctl_fd, 1, 0); 396 exit(0); 397 } else { 398 struct apm_power_info pinfo; 399 power_status(ctl_fd, 1, &pinfo); 400 do_ac_state(pinfo.ac_state); 401 } 402 403 (void) signal(SIGTERM, sigexit); 404 (void) signal(SIGHUP, sigexit); 405 (void) signal(SIGINT, sigexit); 406 (void) signal(SIGPIPE, SIG_IGN); 407 408 409 sock_fd = bind_socket(sockname, mode, uid, gid); 410 411 FD_ZERO(&devfds); 412 FD_SET(ctl_fd, &devfds); 413 FD_SET(sock_fd, &devfds); 414 415 416 417 for (selcopy = devfds, errno = 0, stv = tv; 418 (ready = select(MAX(ctl_fd,sock_fd)+1, &selcopy, 0, 0, &stv)) >= 0 || 419 errno == EINTR; 420 selcopy = devfds, errno = 0, stv = tv) { 421 if (errno == EINTR) 422 continue; 423 if (ready == 0) { 424 /* wakeup for timeout: take status */ 425 power_status(ctl_fd, 0, 0); 426 } 427 if (FD_ISSET(ctl_fd, &selcopy)) { 428 suspends = standbys = resumes = 0; 429 while (ioctl(ctl_fd, APM_IOC_NEXTEVENT, &apmevent) == 0) { 430 syslog(LOG_DEBUG, "apmevent %04x index %d", apmevent.type, 431 apmevent.index); 432 switch (apmevent.type) { 433 case APM_SUSPEND_REQ: 434 case APM_USER_SUSPEND_REQ: 435 case APM_CRIT_SUSPEND_REQ: 436 suspends++; 437 break; 438 case APM_BATTERY_LOW: 439 if (lowbattsleep) 440 suspends++; 441 break; 442 case APM_USER_STANDBY_REQ: 443 case APM_STANDBY_REQ: 444 standbys++; 445 break; 446 #if 0 447 case APM_CANCEL: 448 suspends = standbys = 0; 449 break; 450 #endif 451 case APM_NORMAL_RESUME: 452 case APM_CRIT_RESUME: 453 case APM_SYS_STANDBY_RESUME: 454 resumes++; 455 break; 456 case APM_POWER_CHANGE: 457 { 458 struct apm_power_info pinfo; 459 power_status(ctl_fd, 1, &pinfo); 460 do_ac_state(pinfo.ac_state); 461 break; 462 } 463 default: 464 break; 465 } 466 } 467 if ((standbys || suspends) && noacsleep && 468 power_status(ctl_fd, 0, 0)) { 469 syslog(LOG_DEBUG, "not sleeping cuz AC is connected"); 470 } else if (suspends) { 471 suspend(ctl_fd); 472 } else if (standbys) { 473 stand_by(ctl_fd); 474 } else if (resumes) { 475 resume(ctl_fd); 476 syslog(LOG_NOTICE, "system resumed from APM sleep"); 477 } 478 ready--; 479 } 480 if (ready == 0) 481 continue; 482 if (FD_ISSET(sock_fd, &selcopy)) { 483 switch (handle_client(sock_fd, ctl_fd)) { 484 case NORMAL: 485 break; 486 case SUSPENDING: 487 suspend(ctl_fd); 488 break; 489 case STANDING_BY: 490 stand_by(ctl_fd); 491 break; 492 } 493 } 494 } 495 syslog(LOG_ERR, "select failed: %m"); 496 exit(1); 497 } 498 499 void 500 do_etc_file(const char *file) 501 { 502 pid_t pid; 503 int status; 504 const char *prog; 505 506 /* If file doesn't exist, do nothing. */ 507 if (access(file, X_OK|R_OK)) { 508 syslog(LOG_DEBUG, "do_etc_file(): cannot access file %s", file); 509 return; 510 } 511 512 prog = strrchr(file, '/'); 513 if (prog) 514 prog++; 515 else 516 prog = file; 517 518 pid = fork(); 519 switch (pid) { 520 case -1: 521 syslog(LOG_ERR, "failed to fork(): %m"); 522 return; 523 case 0: 524 /* We are the child. */ 525 execl(file, prog, NULL); 526 _exit(-1); 527 /* NOTREACHED */ 528 default: 529 /* We are the parent. */ 530 wait4(pid, &status, 0, 0); 531 if (WIFEXITED(status)) 532 syslog(LOG_DEBUG, "%s exited with status %d", file, 533 WEXITSTATUS(status)); 534 else { 535 syslog(LOG_ERR, "%s exited abnormally.", file); 536 } 537 break; 538 } 539 } 540 541 void 542 do_ac_state(int state) 543 { 544 switch (state) { 545 case APM_AC_OFF: 546 do_etc_file(_PATH_APM_ETC_BATTERY); 547 break; 548 case APM_AC_ON: 549 case APM_AC_BACKUP: 550 do_etc_file(_PATH_APM_ETC_LINE); 551 break; 552 default: 553 /* Silently ignore */ 554 } 555 } 556
Indexes created Wed Sep 24 15:09:51 GMT 2025