apmd.c revision 1.8
1 /* $NetBSD: apmd.c,v 1.8 1998/07/18 05:04:39 lukem 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 83 void 84 sigexit(int signo) 85 { 86 exit(1); 87 } 88 89 void 90 usage(void) 91 { 92 fprintf(stderr,"usage: %s [-d] [-t timo] [-s] [-a] [-f devfile] [-S sockfile]\n\t[-m sockmode] [-o sockowner]\n", __progname); 93 exit(1); 94 } 95 96 97 int 98 power_status(int fd, int force, struct apm_power_info *pinfo) 99 { 100 struct apm_power_info bstate; 101 static struct apm_power_info last; 102 int acon = 0; 103 104 if (ioctl(fd, APM_IOC_GETPOWER, &bstate) == 0) { 105 /* various conditions under which we report status: something changed 106 enough since last report, or asked to force a print */ 107 if (bstate.ac_state == APM_AC_ON) 108 acon = 1; 109 if (force || 110 bstate.ac_state != last.ac_state || 111 bstate.battery_state != last.battery_state || 112 (bstate.minutes_left && bstate.minutes_left < 15) || 113 abs(bstate.battery_life - last.battery_life) > 20) { 114 if (bstate.minutes_left) 115 syslog(LOG_NOTICE, 116 "battery status: %s. external power status: %s. " 117 "estimated battery life %d%% (%d minutes)", 118 battstate(bstate.battery_state), 119 ac_state(bstate.ac_state), bstate.battery_life, 120 bstate.minutes_left); 121 else 122 syslog(LOG_NOTICE, 123 "battery status: %s. external power status: %s. " 124 "estimated battery life %d%%", 125 battstate(bstate.battery_state), 126 ac_state(bstate.ac_state), bstate.battery_life); 127 last = bstate; 128 } 129 if (pinfo) 130 *pinfo = bstate; 131 } else 132 syslog(LOG_ERR, "cannot fetch power status: %m"); 133 return acon; 134 } 135 136 static char *socketname; 137 138 static void sockunlink(void); 139 140 static void 141 sockunlink(void) 142 { 143 if (socketname) 144 (void) remove(socketname); 145 } 146 147 int 148 bind_socket(const char *sockname, mode_t mode, uid_t uid, gid_t gid) 149 { 150 int sock; 151 struct sockaddr_un s_un; 152 153 sock = socket(AF_LOCAL, SOCK_STREAM, 0); 154 if (sock == -1) 155 err(1, "cannot create local socket"); 156 157 s_un.sun_family = AF_LOCAL; 158 strncpy(s_un.sun_path, sockname, sizeof(s_un.sun_path)); 159 s_un.sun_len = SUN_LEN(&s_un); 160 /* remove it if present, we're moving in */ 161 (void) remove(sockname); 162 if (bind(sock, (struct sockaddr *)&s_un, s_un.sun_len) == -1) 163 err(1, "cannot create APM socket"); 164 if (chmod(sockname, mode) == -1 || chown(sockname, uid, gid) == -1) 165 err(1, "cannot set socket mode/owner/group to %o/%d/%d", 166 mode, uid, gid); 167 listen(sock, 1); 168 socketname = strdup(sockname); 169 atexit(sockunlink); 170 return sock; 171 } 172 173 enum apm_state 174 handle_client(int sock_fd, int ctl_fd) 175 { 176 /* accept a handle from the client, process it, then clean up */ 177 int cli_fd; 178 struct sockaddr_un from; 179 int fromlen = sizeof(from); 180 struct apm_command cmd; 181 struct apm_reply reply; 182 183 cli_fd = accept(sock_fd, (struct sockaddr *)&from, &fromlen); 184 if (cli_fd == -1) { 185 syslog(LOG_INFO, "client accept failure: %m"); 186 return NORMAL; 187 } 188 if (recv(cli_fd, &cmd, sizeof(cmd), 0) != sizeof(cmd)) { 189 (void) close(cli_fd); 190 syslog(LOG_INFO, "client size botch"); 191 return NORMAL; 192 } 193 if (cmd.vno != APMD_VNO) { 194 close(cli_fd); /* terminate client */ 195 /* no error message, just drop it. */ 196 return NORMAL; 197 } 198 power_status(ctl_fd, 0, &reply.batterystate); 199 switch (cmd.action) { 200 default: 201 reply.newstate = NORMAL; 202 break; 203 case SUSPEND: 204 reply.newstate = SUSPENDING; 205 break; 206 case STANDBY: 207 reply.newstate = STANDING_BY; 208 break; 209 } 210 reply.vno = APMD_VNO; 211 if (send(cli_fd, &reply, sizeof(reply), 0) != sizeof(reply)) { 212 syslog(LOG_INFO, "client reply botch"); 213 } 214 close(cli_fd); 215 return reply.newstate; 216 } 217 218 static int speaker_ok = TRUE; 219 220 void 221 make_noise(howmany) 222 int howmany; 223 { 224 int spkrfd; 225 int trycnt; 226 227 if (!speaker_ok) /* don't bother after sticky errors */ 228 return; 229 230 for (trycnt = 0; trycnt < 3; trycnt++) { 231 spkrfd = open(_PATH_DEV_SPEAKER, O_WRONLY); 232 if (spkrfd == -1) { 233 switch (errno) { 234 case EBUSY: 235 usleep(500000); 236 errno = EBUSY; 237 continue; 238 case ENOENT: 239 case ENODEV: 240 case ENXIO: 241 case EPERM: 242 case EACCES: 243 syslog(LOG_INFO, 244 "speaker device " _PATH_DEV_SPEAKER " unavailable: %m"); 245 speaker_ok = FALSE; 246 return; 247 } 248 } else 249 break; 250 } 251 if (spkrfd == -1) { 252 syslog(LOG_WARNING, "cannot open " _PATH_DEV_SPEAKER ": %m"); 253 return; 254 } 255 syslog(LOG_DEBUG, "sending %d tones to speaker\n", howmany); 256 write (spkrfd, "o4cc", 2 + howmany); 257 close(spkrfd); 258 return; 259 } 260 261 262 void 263 suspend(int ctl_fd) 264 { 265 do_etc_file(_PATH_APM_ETC_SUSPEND); 266 sync(); 267 make_noise(2); 268 sync(); 269 sync(); 270 sleep(1); 271 ioctl(ctl_fd, APM_IOC_SUSPEND, 0); 272 } 273 274 void 275 stand_by(int ctl_fd) 276 { 277 do_etc_file(_PATH_APM_ETC_STANDBY); 278 sync(); 279 make_noise(1); 280 sync(); 281 sync(); 282 sleep(1); 283 ioctl(ctl_fd, APM_IOC_STANDBY, 0); 284 } 285 286 #define TIMO (10*60) /* 10 minutes */ 287 288 void 289 resume(int ctl_fd) 290 { 291 do_etc_file(_PATH_APM_ETC_RESUME); 292 } 293 294 int 295 main(int argc, char *argv[]) 296 { 297 const char *fname = apmdev; 298 int ctl_fd, sock_fd, ch, ready; 299 int statonly = 0; 300 fd_set devfds; 301 fd_set selcopy; 302 struct apm_event_info apmevent; 303 int suspends, standbys, resumes; 304 int noacsleep = 0; 305 mode_t mode = 0660; 306 struct timeval tv = {TIMO, 0}, stv; 307 const char *sockname = sockfile; 308 char *user, *group; 309 char *scratch; 310 uid_t uid = 0; 311 gid_t gid = 0; 312 struct passwd *pw; 313 struct group *gr; 314 315 while ((ch = getopt(argc, argv, "qadsf:t:S:m:o:")) != -1) 316 switch(ch) { 317 case 'q': 318 speaker_ok = FALSE; 319 break; 320 case 'a': 321 noacsleep = 1; 322 break; 323 case 'd': 324 debug = 1; 325 break; 326 case 'f': 327 fname = optarg; 328 break; 329 case 'S': 330 sockname = optarg; 331 break; 332 case 't': 333 tv.tv_sec = strtoul(optarg, 0, 0); 334 if (tv.tv_sec == 0) 335 usage(); 336 break; 337 case 'm': 338 mode = strtoul(optarg, 0, 8); 339 if (mode == 0) 340 usage(); 341 break; 342 case 'o': 343 /* (user):(group) */ 344 user = optarg; 345 group = strchr(user, ':'); 346 if (group) 347 *group++ = '\0'; 348 if (*user) { 349 uid = strtoul(user, &scratch, 0); 350 if (*scratch != '\0') { 351 pw = getpwnam(user); 352 if (pw) 353 uid = pw->pw_uid; 354 else 355 errx(1, "user name `%s' unknown", user); 356 } 357 } 358 if (group && *group) { 359 gid = strtoul(group, &scratch, 0); 360 if (*scratch != '\0') { 361 gr = getgrnam(group); 362 if (gr) 363 gid = gr->gr_gid; 364 else 365 errx(1, "group name `%s' unknown", group); 366 } 367 } 368 break; 369 case 's': /* status only */ 370 statonly = 1; 371 break; 372 case '?': 373 374 default: 375 usage(); 376 } 377 argc -= optind; 378 argv += optind; 379 if ((ctl_fd = open(fname, O_RDWR)) == -1) { 380 (void)err(1, "cannot open device file `%s'", fname); 381 } 382 if (debug) { 383 openlog(__progname, LOG_CONS, LOG_LOCAL1); 384 } else { 385 openlog(__progname, LOG_CONS, LOG_DAEMON); 386 setlogmask(LOG_UPTO(LOG_NOTICE)); 387 daemon(0, 0); 388 } 389 power_status(ctl_fd, 1, 0); 390 if (statonly) 391 exit(0); 392 (void) signal(SIGTERM, sigexit); 393 (void) signal(SIGHUP, sigexit); 394 (void) signal(SIGINT, sigexit); 395 (void) signal(SIGPIPE, SIG_IGN); 396 397 sock_fd = bind_socket(sockname, mode, uid, gid); 398 399 FD_ZERO(&devfds); 400 FD_SET(ctl_fd, &devfds); 401 FD_SET(sock_fd, &devfds); 402 403 for (selcopy = devfds, errno = 0, stv = tv; 404 (ready = select(MAX(ctl_fd,sock_fd)+1, &selcopy, 0, 0, &stv)) >= 0 || 405 errno == EINTR; 406 selcopy = devfds, errno = 0, stv = tv) { 407 if (errno == EINTR) 408 continue; 409 if (ready == 0) { 410 /* wakeup for timeout: take status */ 411 power_status(ctl_fd, 0, 0); 412 } 413 if (FD_ISSET(ctl_fd, &selcopy)) { 414 suspends = standbys = resumes = 0; 415 while (ioctl(ctl_fd, APM_IOC_NEXTEVENT, &apmevent) == 0) { 416 syslog(LOG_DEBUG, "apmevent %04x index %d", apmevent.type, 417 apmevent.index); 418 switch (apmevent.type) { 419 case APM_SUSPEND_REQ: 420 case APM_USER_SUSPEND_REQ: 421 case APM_CRIT_SUSPEND_REQ: 422 case APM_BATTERY_LOW: 423 suspends++; 424 break; 425 case APM_USER_STANDBY_REQ: 426 case APM_STANDBY_REQ: 427 standbys++; 428 break; 429 #if 0 430 case APM_CANCEL: 431 suspends = standbys = 0; 432 break; 433 #endif 434 case APM_NORMAL_RESUME: 435 case APM_CRIT_RESUME: 436 case APM_SYS_STANDBY_RESUME: 437 resumes++; 438 break; 439 case APM_POWER_CHANGE: 440 power_status(ctl_fd, 1, 0); 441 break; 442 default: 443 break; 444 } 445 } 446 if ((standbys || suspends) && noacsleep && 447 power_status(ctl_fd, 0, 0)) { 448 syslog(LOG_DEBUG, "not sleeping cuz AC is connected"); 449 } else if (suspends) { 450 suspend(ctl_fd); 451 } else if (standbys) { 452 stand_by(ctl_fd); 453 } else if (resumes) { 454 resume(ctl_fd); 455 syslog(LOG_NOTICE, "system resumed from APM sleep"); 456 } 457 ready--; 458 } 459 if (ready == 0) 460 continue; 461 if (FD_ISSET(sock_fd, &selcopy)) { 462 switch (handle_client(sock_fd, ctl_fd)) { 463 case NORMAL: 464 break; 465 case SUSPENDING: 466 suspend(ctl_fd); 467 break; 468 case STANDING_BY: 469 stand_by(ctl_fd); 470 break; 471 } 472 } 473 } 474 syslog(LOG_ERR, "select failed: %m"); 475 exit(1); 476 } 477 478 void 479 do_etc_file(const char *file) 480 { 481 pid_t pid; 482 int status; 483 const char *prog; 484 485 /* If file doesn't exist, do nothing. */ 486 if (access(file, X_OK|R_OK)) { 487 syslog(LOG_DEBUG, "do_etc_file(): cannot access file %s", file); 488 return; 489 } 490 491 prog = strrchr(file, '/'); 492 if (prog) 493 prog++; 494 else 495 prog = file; 496 497 pid = fork(); 498 switch (pid) { 499 case -1: 500 syslog(LOG_ERR, "failed to fork(): %m"); 501 return; 502 case 0: 503 /* We are the child. */ 504 execl(file, prog, NULL); 505 _exit(-1); 506 /* NOTREACHED */ 507 default: 508 /* We are the parent. */ 509 wait4(pid, &status, 0, 0); 510 if (WIFEXITED(status)) 511 syslog(LOG_DEBUG, "%s exited with status %d", file, 512 WEXITSTATUS(status)); 513 else { 514 syslog(LOG_ERR, "%s exited abnormally.", file); 515 } 516 break; 517 } 518 } 519
Indexes created Tue Sep 23 14:10:03 GMT 2025