2 * SPDX-License-Identifier: BSD-2-Clause
4 * APM (Advanced Power Management) Event Dispatcher
6 * Copyright (c) 1999 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
7 * Copyright (c) 1999 KOIE Hidetaka <koie@suri.co.jp>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/types.h>
34 #include <bitstring.h>
45 #include <sys/ioctl.h>
48 #include <machine/apm_bios.h>
54 int soft_power_state_change = 0;
55 const char *apmd_configfile = APMD_CONFIGFILE;
56 const char *apmd_pidfile = APMD_PIDFILE;
57 int apmctl_fd = -1, apmnorm_fd = -1;
60 * table of event handlers
62 #define EVENT_CONFIG_INITIALIZER(EV,R) { #EV, NULL, R },
63 struct event_config events[EVENT_MAX] = {
64 EVENT_CONFIG_INITIALIZER(NOEVENT, 0)
65 EVENT_CONFIG_INITIALIZER(STANDBYREQ, 1)
66 EVENT_CONFIG_INITIALIZER(SUSPENDREQ, 1)
67 EVENT_CONFIG_INITIALIZER(NORMRESUME, 0)
68 EVENT_CONFIG_INITIALIZER(CRITRESUME, 0)
69 EVENT_CONFIG_INITIALIZER(BATTERYLOW, 0)
70 EVENT_CONFIG_INITIALIZER(POWERSTATECHANGE, 0)
71 EVENT_CONFIG_INITIALIZER(UPDATETIME, 0)
72 EVENT_CONFIG_INITIALIZER(CRITSUSPEND, 1)
73 EVENT_CONFIG_INITIALIZER(USERSTANDBYREQ, 1)
74 EVENT_CONFIG_INITIALIZER(USERSUSPENDREQ, 1)
75 EVENT_CONFIG_INITIALIZER(STANDBYRESUME, 0)
76 EVENT_CONFIG_INITIALIZER(CAPABILITIESCHANGE, 0)
80 * List of battery events
82 struct battery_watch_event *battery_watch_list = NULL;
84 #define BATT_CHK_INTV 10 /* how many seconds between battery state checks? */
90 event_cmd_default_clone(void *this)
92 struct event_cmd * oldone = this;
93 struct event_cmd * newone = malloc(oldone->len);
96 newone->len = oldone->len;
97 newone->name = oldone->name;
98 newone->op = oldone->op;
106 event_cmd_exec_act(void *this)
108 struct event_cmd_exec * p = this;
112 switch ((pid = fork())) {
118 signal(SIGHUP, SIG_DFL);
119 signal(SIGCHLD, SIG_DFL);
120 signal(SIGTERM, SIG_DFL);
121 execl(_PATH_BSHELL, "sh", "-c", p->line, (char *)NULL);
126 pid = waitpid(pid, &status, 0);
127 } while (pid == -1 && errno == EINTR);
133 event_cmd_exec_dump(void *this, FILE *fp)
135 fprintf(fp, " \"%s\"", ((struct event_cmd_exec *)this)->line);
138 event_cmd_exec_clone(void *this)
140 struct event_cmd_exec * newone = (struct event_cmd_exec *) event_cmd_default_clone(this);
141 struct event_cmd_exec * oldone = this;
143 newone->evcmd.next = NULL;
144 newone->evcmd.len = oldone->evcmd.len;
145 newone->evcmd.name = oldone->evcmd.name;
146 newone->evcmd.op = oldone->evcmd.op;
147 if ((newone->line = strdup(oldone->line)) == NULL)
148 err(1, "out of memory");
149 return (struct event_cmd *) newone;
152 event_cmd_exec_free(void *this)
154 free(((struct event_cmd_exec *)this)->line);
156 struct event_cmd_op event_cmd_exec_ops = {
159 event_cmd_exec_clone,
167 event_cmd_reject_act(void *this __unused)
171 if (ioctl(apmctl_fd, APMIO_REJECTLASTREQ, NULL)) {
172 syslog(LOG_NOTICE, "fail to reject\n");
177 struct event_cmd_op event_cmd_reject_ops = {
178 event_cmd_reject_act,
180 event_cmd_default_clone,
185 * manipulate event_config
188 clone_event_cmd_list(struct event_cmd *p)
190 struct event_cmd dummy;
191 struct event_cmd *q = &dummy;
192 for ( ;p; p = p->next) {
193 assert(p->op->clone);
194 if ((q->next = p->op->clone(p)) == NULL)
195 err(1, "out of memory");
202 free_event_cmd_list(struct event_cmd *p)
204 struct event_cmd * q;
213 register_battery_handlers(
214 int level, int direction,
215 struct event_cmd *cmdlist)
218 * level is negative if it's in "minutes", non-negative if
221 * direction =1 means we care about this level when charging,
222 * direction =-1 means we care about it when discharging.
224 if (level>100) /* percentage > 100 */
226 if (abs(direction) != 1) /* nonsense direction value */
230 struct battery_watch_event *we;
232 if ((we = malloc(sizeof(struct battery_watch_event))) == NULL)
233 err(1, "out of memory");
235 we->next = battery_watch_list; /* starts at NULL */
236 battery_watch_list = we;
237 we->level = abs(level);
238 we->type = (level<0)?BATTERY_MINUTES:BATTERY_PERCENT;
239 we->direction = (direction<0)?BATTERY_DISCHARGING:
242 we->cmdlist = clone_event_cmd_list(cmdlist);
247 register_apm_event_handlers(
248 bitstr_t bit_decl(evlist, EVENT_MAX),
249 struct event_cmd *cmdlist)
252 bitstr_t bit_decl(tmp, EVENT_MAX);
253 memcpy(&tmp, evlist, bitstr_size(EVENT_MAX));
259 bit_ffs(tmp, EVENT_MAX, &n);
262 p = events[n].cmdlist;
263 if ((q = clone_event_cmd_list(cmdlist)) == NULL)
264 err(1, "out of memory");
266 while (p->next != NULL)
270 events[n].cmdlist = q;
282 exec_run_cmd(struct event_cmd *p)
286 for (; p; p = p->next) {
289 syslog(LOG_INFO, "action: %s", p->name);
290 status = p->op->act(p);
292 syslog(LOG_NOTICE, "command finished with %d\n", status);
300 * execute command -- the event version
303 exec_event_cmd(struct event_config *ev)
307 status = exec_run_cmd(ev->cmdlist);
308 if (status && ev->rejectable) {
309 syslog(LOG_ERR, "canceled");
310 event_cmd_reject_act(NULL);
326 if ((yyin = fopen(apmd_configfile, "r")) == NULL) {
327 err(1, "cannot open config file");
331 yydebug = debug_level;
335 err(1, "cannot parse config file");
340 for (i = 0; i < EVENT_MAX; i++) {
341 if (events[i].cmdlist) {
342 u_int event_type = i;
343 if (write(apmctl_fd, &event_type, sizeof(u_int)) == -1) {
344 err(1, "cannot enable event 0x%x", event_type);
354 struct battery_watch_event *q;
356 for (i = 0; i < EVENT_MAX; i++) {
357 struct event_cmd * p;
358 if ((p = events[i].cmdlist)) {
359 fprintf(stderr, "apm_event %s {\n", events[i].name);
360 for ( ; p ; p = p->next) {
361 fprintf(stderr, "\t%s", p->name);
363 p->op->dump(p, stderr);
364 fprintf(stderr, ";\n");
366 fprintf(stderr, "}\n");
369 for (q = battery_watch_list ; q != NULL ; q = q -> next) {
370 struct event_cmd * p;
371 fprintf(stderr, "apm_battery %d%s %s {\n",
373 (q -> type == BATTERY_PERCENT)?"%":"m",
374 (q -> direction == BATTERY_CHARGING)?"charging":
376 for ( p = q -> cmdlist; p ; p = p->next) {
377 fprintf(stderr, "\t%s", p->name);
379 p->op->dump(p, stderr);
380 fprintf(stderr, ";\n");
382 fprintf(stderr, "}\n");
390 struct battery_watch_event *q;
393 for (i = 0; i < EVENT_MAX; i++) {
394 if (events[i].cmdlist) {
395 u_int event_type = i;
396 if (write(apmctl_fd, &event_type, sizeof(u_int)) == -1) {
397 err(1, "cannot disable event 0x%x", event_type);
402 for (i = 0; i < EVENT_MAX; i++) {
403 struct event_cmd * p;
404 if ((p = events[i].cmdlist))
405 free_event_cmd_list(p);
406 events[i].cmdlist = NULL;
409 for( ; battery_watch_list; battery_watch_list = battery_watch_list -> next) {
410 free_event_cmd_list(battery_watch_list->cmdlist);
411 q = battery_watch_list->next;
412 free(battery_watch_list);
413 battery_watch_list = q;
432 FILE *fp = fopen(apmd_pidfile, "w");
435 fprintf(fp, "%ld\n", (long)getpid());
443 static int signal_fd[2];
446 enque_signal(int sig)
448 if (write(signal_fd[1], &sig, sizeof sig) != sizeof sig)
449 err(1, "cannot process signal.");
456 while (waitpid(-1, &status, WNOHANG) > 0)
466 while (read(fd, &sig, sizeof sig) == sizeof sig) {
467 syslog(LOG_INFO, "caught signal: %d", sig);
470 syslog(LOG_NOTICE, "restart by SIG");
474 syslog(LOG_NOTICE, "going down on signal %d", sig);
481 warn("unexpected signal(%d) received.", sig);
488 proc_apmevent(int fd)
490 struct apm_event_info apmevent;
492 while (ioctl(fd, APMIO_NEXTEVENT, &apmevent) == 0) {
494 syslog(LOG_NOTICE, "apmevent %04x index %d\n",
495 apmevent.type, apmevent.index);
496 syslog(LOG_INFO, "apm event: %s", events[apmevent.type].name);
498 status = exec_event_cmd(&events[apmevent.type]);
504 #define AC_POWER_STATE ((pw_info.ai_acline == 1) ? BATTERY_CHARGING :\
511 static int first_time=1, last_state;
514 struct apm_info pw_info;
515 struct battery_watch_event *p;
517 /* If we don't care, don't bother */
518 if (battery_watch_list == NULL)
522 if ( ioctl(apmnorm_fd, APMIO_GETINFO, &pw_info) < 0)
523 err(1, "cannot check battery state.");
525 * This next statement isn't entirely true. The spec does not tie AC
526 * line state to battery charging or not, but this is a bit lazier to do.
528 last_state = AC_POWER_STATE;
530 return; /* We can't process events, we have no baseline */
534 * XXX - should we do this a bunch of times and perform some sort
535 * of smoothing or correction?
537 if ( ioctl(apmnorm_fd, APMIO_GETINFO, &pw_info) < 0)
538 err(1, "cannot check battery state.");
541 * If we're not in the state now that we were in last time,
542 * then it's a transition, which means we must clean out
543 * the event-caught state.
545 if (last_state != AC_POWER_STATE) {
546 if (soft_power_state_change && fork() == 0) {
547 status = exec_event_cmd(&events[PMEV_POWERSTATECHANGE]);
550 last_state = AC_POWER_STATE;
551 for (p = battery_watch_list ; p!=NULL ; p = p -> next)
554 for (p = battery_watch_list ; p != NULL ; p = p -> next)
555 if (p -> direction == AC_POWER_STATE &&
557 ((p -> type == BATTERY_PERCENT &&
558 p -> level == (int)pw_info.ai_batt_life) ||
559 (p -> type == BATTERY_MINUTES &&
560 p -> level == (pw_info.ai_batt_time / 60)))) {
563 syslog(LOG_NOTICE, "Caught battery event: %s, %d%s",
564 (p -> direction == BATTERY_CHARGING)?"charging":"discharging",
566 (p -> type == BATTERY_PERCENT)?"%":" minutes");
568 status = exec_run_cmd(p -> cmdlist);
577 struct sigaction nsa;
579 sigset_t sigmask, osigmask;
581 FD_ZERO(&master_rfds);
582 FD_SET(apmctl_fd, &master_rfds);
583 fdmax = apmctl_fd > fdmax ? apmctl_fd : fdmax;
585 FD_SET(signal_fd[0], &master_rfds);
586 fdmax = signal_fd[0] > fdmax ? signal_fd[0] : fdmax;
588 memset(&nsa, 0, sizeof nsa);
589 nsa.sa_handler = enque_signal;
590 sigfillset(&nsa.sa_mask);
591 nsa.sa_flags = SA_RESTART;
592 sigaction(SIGHUP, &nsa, NULL);
593 sigaction(SIGCHLD, &nsa, NULL);
594 sigaction(SIGTERM, &nsa, NULL);
596 sigemptyset(&sigmask);
597 sigaddset(&sigmask, SIGHUP);
598 sigaddset(&sigmask, SIGCHLD);
599 sigaddset(&sigmask, SIGTERM);
600 sigprocmask(SIG_SETMASK, &sigmask, &osigmask);
607 to.tv_sec = BATT_CHK_INTV;
610 memcpy(&rfds, &master_rfds, sizeof rfds);
611 sigprocmask(SIG_SETMASK, &osigmask, NULL);
612 if ((res=select(fdmax + 1, &rfds, 0, 0, &to)) < 0) {
616 sigprocmask(SIG_SETMASK, &sigmask, NULL);
618 if (res == 0) { /* time to check the battery */
623 if (FD_ISSET(signal_fd[0], &rfds)) {
624 if (proc_signal(signal_fd[0]) < 0)
628 if (FD_ISSET(apmctl_fd, &rfds))
629 proc_apmevent(apmctl_fd);
634 main(int ac, char* av[])
639 int logopt = LOG_NDELAY | LOG_PID;
641 while ((ch = getopt(ac, av, "df:sv")) != -1) {
648 apmd_configfile = optarg;
651 soft_power_state_change = 1;
657 err(1, "unknown option `%c'", ch);
669 logopt |= LOG_PERROR;
671 prog = strrchr(av[0], '/');
672 openlog(prog ? prog+1 : av[0], logopt, LOG_DAEMON);
674 syslog(LOG_NOTICE, "start");
676 if (pipe(signal_fd) < 0)
678 if (fcntl(signal_fd[0], F_SETFL, O_NONBLOCK) < 0)
681 if ((apmnorm_fd = open(APM_NORM_DEVICEFILE, O_RDWR)) == -1) {
682 err(1, "cannot open device file `%s'", APM_NORM_DEVICEFILE);
685 if (fcntl(apmnorm_fd, F_SETFD, 1) == -1) {
686 err(1, "cannot set close-on-exec flag for device file '%s'", APM_NORM_DEVICEFILE);
689 if ((apmctl_fd = open(APM_CTL_DEVICEFILE, O_RDWR)) == -1) {
690 err(1, "cannot open device file `%s'", APM_CTL_DEVICEFILE);
693 if (fcntl(apmctl_fd, F_SETFD, 1) == -1) {
694 err(1, "cannot set close-on-exec flag for device file '%s'", APM_CTL_DEVICEFILE);