713 lines
15 KiB
C
713 lines
15 KiB
C
/*-
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* APM (Advanced Power Management) Event Dispatcher
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*
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* Copyright (c) 1999 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
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* Copyright (c) 1999 KOIE Hidetaka <koie@suri.co.jp>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <assert.h>
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#include <bitstring.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <machine/apm_bios.h>
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#include "apmd.h"
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int debug_level = 0;
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int verbose = 0;
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int soft_power_state_change = 0;
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const char *apmd_configfile = APMD_CONFIGFILE;
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const char *apmd_pidfile = APMD_PIDFILE;
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int apmctl_fd = -1, apmnorm_fd = -1;
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/*
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* table of event handlers
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*/
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#define EVENT_CONFIG_INITIALIZER(EV,R) { #EV, NULL, R },
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struct event_config events[EVENT_MAX] = {
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EVENT_CONFIG_INITIALIZER(NOEVENT, 0)
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EVENT_CONFIG_INITIALIZER(STANDBYREQ, 1)
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EVENT_CONFIG_INITIALIZER(SUSPENDREQ, 1)
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EVENT_CONFIG_INITIALIZER(NORMRESUME, 0)
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EVENT_CONFIG_INITIALIZER(CRITRESUME, 0)
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EVENT_CONFIG_INITIALIZER(BATTERYLOW, 0)
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EVENT_CONFIG_INITIALIZER(POWERSTATECHANGE, 0)
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EVENT_CONFIG_INITIALIZER(UPDATETIME, 0)
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EVENT_CONFIG_INITIALIZER(CRITSUSPEND, 1)
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EVENT_CONFIG_INITIALIZER(USERSTANDBYREQ, 1)
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EVENT_CONFIG_INITIALIZER(USERSUSPENDREQ, 1)
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EVENT_CONFIG_INITIALIZER(STANDBYRESUME, 0)
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EVENT_CONFIG_INITIALIZER(CAPABILITIESCHANGE, 0)
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};
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/*
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* List of battery events
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*/
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struct battery_watch_event *battery_watch_list = NULL;
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#define BATT_CHK_INTV 10 /* how many seconds between battery state checks? */
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/*
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* default procedure
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*/
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struct event_cmd *
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event_cmd_default_clone(void *this)
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{
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struct event_cmd * oldone = this;
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struct event_cmd * newone = malloc(oldone->len);
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newone->next = NULL;
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newone->len = oldone->len;
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newone->name = oldone->name;
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newone->op = oldone->op;
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return newone;
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}
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/*
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* exec command
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*/
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int
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event_cmd_exec_act(void *this)
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{
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struct event_cmd_exec * p = this;
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int status = -1;
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pid_t pid;
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switch ((pid = fork())) {
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case -1:
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warn("cannot fork");
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goto out;
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case 0:
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/* child process */
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signal(SIGHUP, SIG_DFL);
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signal(SIGCHLD, SIG_DFL);
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signal(SIGTERM, SIG_DFL);
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execl(_PATH_BSHELL, "sh", "-c", p->line, NULL);
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_exit(127);
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default:
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/* parent process */
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do {
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pid = waitpid(pid, &status, 0);
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} while (pid == -1 && errno == EINTR);
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break;
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}
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out:
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return status;
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}
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void
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event_cmd_exec_dump(void *this, FILE *fp)
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{
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fprintf(fp, " \"%s\"", ((struct event_cmd_exec *)this)->line);
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}
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struct event_cmd *
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event_cmd_exec_clone(void *this)
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{
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struct event_cmd_exec * newone = (struct event_cmd_exec *) event_cmd_default_clone(this);
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struct event_cmd_exec * oldone = this;
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newone->evcmd.next = NULL;
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newone->evcmd.len = oldone->evcmd.len;
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newone->evcmd.name = oldone->evcmd.name;
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newone->evcmd.op = oldone->evcmd.op;
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if ((newone->line = strdup(oldone->line)) == NULL)
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err(1, "out of memory");
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return (struct event_cmd *) newone;
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}
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void
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event_cmd_exec_free(void *this)
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{
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free(((struct event_cmd_exec *)this)->line);
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}
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struct event_cmd_op event_cmd_exec_ops = {
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event_cmd_exec_act,
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event_cmd_exec_dump,
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event_cmd_exec_clone,
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event_cmd_exec_free
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};
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/*
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* reject commad
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*/
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int
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event_cmd_reject_act(void *this __unused)
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{
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int rc = -1;
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if (ioctl(apmctl_fd, APMIO_REJECTLASTREQ, NULL)) {
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syslog(LOG_NOTICE, "fail to reject\n");
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goto out;
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}
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rc = 0;
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out:
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return rc;
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}
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struct event_cmd_op event_cmd_reject_ops = {
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event_cmd_reject_act,
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NULL,
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event_cmd_default_clone,
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NULL
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};
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/*
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* manipulate event_config
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*/
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struct event_cmd *
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clone_event_cmd_list(struct event_cmd *p)
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{
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struct event_cmd dummy;
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struct event_cmd *q = &dummy;
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for ( ;p; p = p->next) {
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assert(p->op->clone);
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if ((q->next = p->op->clone(p)) == NULL)
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err(1, "out of memory");
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q = q->next;
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}
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q->next = NULL;
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return dummy.next;
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}
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void
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free_event_cmd_list(struct event_cmd *p)
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{
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struct event_cmd * q;
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for ( ; p ; p = q) {
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q = p->next;
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if (p->op->free)
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p->op->free(p);
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free(p);
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}
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}
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int
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register_battery_handlers(
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int level, int direction,
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struct event_cmd *cmdlist)
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{
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/*
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* level is negative if it's in "minutes", non-negative if
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* percentage.
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*
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* direction =1 means we care about this level when charging,
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* direction =-1 means we care about it when discharging.
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*/
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if (level>100) /* percentage > 100 */
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return -1;
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if (abs(direction) != 1) /* nonsense direction value */
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return -1;
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if (cmdlist) {
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struct battery_watch_event *we;
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if ((we = malloc(sizeof(struct battery_watch_event))) == NULL)
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err(1, "out of memory");
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we->next = battery_watch_list; /* starts at NULL */
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battery_watch_list = we;
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we->level = abs(level);
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we->type = (level<0)?BATTERY_MINUTES:BATTERY_PERCENT;
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we->direction = (direction<0)?BATTERY_DISCHARGING:
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BATTERY_CHARGING;
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we->done = 0;
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we->cmdlist = clone_event_cmd_list(cmdlist);
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}
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return 0;
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}
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int
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register_apm_event_handlers(
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bitstr_t bit_decl(evlist, EVENT_MAX),
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struct event_cmd *cmdlist)
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{
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if (cmdlist) {
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bitstr_t bit_decl(tmp, EVENT_MAX);
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memcpy(&tmp, evlist, bitstr_size(EVENT_MAX));
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for (;;) {
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int n;
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struct event_cmd *p;
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struct event_cmd *q;
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bit_ffs(tmp, EVENT_MAX, &n);
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if (n < 0)
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break;
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p = events[n].cmdlist;
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if ((q = clone_event_cmd_list(cmdlist)) == NULL)
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err(1, "out of memory");
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if (p) {
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while (p->next != NULL)
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p = p->next;
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p->next = q;
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} else {
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events[n].cmdlist = q;
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}
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bit_clear(tmp, n);
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}
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}
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return 0;
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}
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/*
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* execute command
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*/
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int
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exec_run_cmd(struct event_cmd *p)
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{
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int status = 0;
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for (; p; p = p->next) {
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assert(p->op->act);
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if (verbose)
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syslog(LOG_INFO, "action: %s", p->name);
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status = p->op->act(p);
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if (status) {
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syslog(LOG_NOTICE, "command finished with %d\n", status);
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break;
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}
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}
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return status;
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}
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/*
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* execute command -- the event version
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*/
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int
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exec_event_cmd(struct event_config *ev)
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{
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int status = 0;
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status = exec_run_cmd(ev->cmdlist);
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if (status && ev->rejectable) {
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syslog(LOG_ERR, "canceled");
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event_cmd_reject_act(NULL);
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}
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return status;
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}
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/*
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* read config file
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*/
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extern FILE * yyin;
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extern int yydebug;
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void
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read_config(void)
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{
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int i;
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if ((yyin = fopen(apmd_configfile, "r")) == NULL) {
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err(1, "cannot open config file");
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}
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#ifdef DEBUG
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yydebug = debug_level;
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#endif
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if (yyparse() != 0)
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err(1, "cannot parse config file");
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fclose(yyin);
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/* enable events */
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for (i = 0; i < EVENT_MAX; i++) {
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if (events[i].cmdlist) {
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u_int event_type = i;
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if (write(apmctl_fd, &event_type, sizeof(u_int)) == -1) {
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err(1, "cannot enable event 0x%x", event_type);
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}
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}
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}
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}
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void
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dump_config(void)
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{
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int i;
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struct battery_watch_event *q;
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for (i = 0; i < EVENT_MAX; i++) {
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struct event_cmd * p;
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if ((p = events[i].cmdlist)) {
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fprintf(stderr, "apm_event %s {\n", events[i].name);
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for ( ; p ; p = p->next) {
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fprintf(stderr, "\t%s", p->name);
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if (p->op->dump)
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p->op->dump(p, stderr);
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fprintf(stderr, ";\n");
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}
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fprintf(stderr, "}\n");
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}
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}
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for (q = battery_watch_list ; q != NULL ; q = q -> next) {
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struct event_cmd * p;
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fprintf(stderr, "apm_battery %d%s %s {\n",
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q -> level,
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(q -> type == BATTERY_PERCENT)?"%":"m",
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(q -> direction == BATTERY_CHARGING)?"charging":
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"discharging");
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for ( p = q -> cmdlist; p ; p = p->next) {
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fprintf(stderr, "\t%s", p->name);
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if (p->op->dump)
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p->op->dump(p, stderr);
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fprintf(stderr, ";\n");
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}
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fprintf(stderr, "}\n");
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}
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}
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void
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destroy_config(void)
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{
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int i;
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struct battery_watch_event *q;
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/* disable events */
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for (i = 0; i < EVENT_MAX; i++) {
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if (events[i].cmdlist) {
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u_int event_type = i;
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if (write(apmctl_fd, &event_type, sizeof(u_int)) == -1) {
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err(1, "cannot disable event 0x%x", event_type);
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}
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}
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}
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for (i = 0; i < EVENT_MAX; i++) {
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struct event_cmd * p;
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if ((p = events[i].cmdlist))
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free_event_cmd_list(p);
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events[i].cmdlist = NULL;
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}
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for( ; battery_watch_list; battery_watch_list = battery_watch_list -> next) {
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free_event_cmd_list(battery_watch_list->cmdlist);
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q = battery_watch_list->next;
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free(battery_watch_list);
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battery_watch_list = q;
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}
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}
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void
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restart(void)
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{
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destroy_config();
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read_config();
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if (verbose)
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dump_config();
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}
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/*
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* write pid file
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*/
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static void
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write_pid(void)
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{
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FILE *fp = fopen(apmd_pidfile, "w");
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if (fp) {
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fprintf(fp, "%d\n", getpid());
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fclose(fp);
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}
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}
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/*
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* handle signals
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*/
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static int signal_fd[2];
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void
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enque_signal(int sig)
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{
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if (write(signal_fd[1], &sig, sizeof sig) != sizeof sig)
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err(1, "cannot process signal.");
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}
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void
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wait_child(void)
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{
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int status;
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while (waitpid(-1, &status, WNOHANG) > 0)
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;
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}
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int
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proc_signal(int fd)
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{
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int rc = -1;
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int sig;
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while (read(fd, &sig, sizeof sig) == sizeof sig) {
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syslog(LOG_INFO, "caught signal: %d", sig);
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switch (sig) {
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case SIGHUP:
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syslog(LOG_NOTICE, "restart by SIG");
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restart();
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break;
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case SIGTERM:
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syslog(LOG_NOTICE, "going down on signal %d", sig);
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rc = -1;
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goto out;
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case SIGCHLD:
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wait_child();
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break;
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default:
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warn("unexpected signal(%d) received.", sig);
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break;
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}
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}
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rc = 0;
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out:
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return rc;
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}
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void
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proc_apmevent(int fd)
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{
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struct apm_event_info apmevent;
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while (ioctl(fd, APMIO_NEXTEVENT, &apmevent) == 0) {
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int status;
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syslog(LOG_NOTICE, "apmevent %04x index %d\n",
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apmevent.type, apmevent.index);
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syslog(LOG_INFO, "apm event: %s", events[apmevent.type].name);
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if (fork() == 0) {
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status = exec_event_cmd(&events[apmevent.type]);
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exit(status);
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}
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}
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}
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#define AC_POWER_STATE ((pw_info.ai_acline == 1) ? BATTERY_CHARGING :\
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BATTERY_DISCHARGING)
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void
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check_battery(void)
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{
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static int first_time=1, last_state;
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int status;
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struct apm_info pw_info;
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struct battery_watch_event *p;
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/* If we don't care, don't bother */
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if (battery_watch_list == NULL)
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return;
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if (first_time) {
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if ( ioctl(apmnorm_fd, APMIO_GETINFO, &pw_info) < 0)
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err(1, "cannot check battery state.");
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/*
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* This next statement isn't entirely true. The spec does not tie AC
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* line state to battery charging or not, but this is a bit lazier to do.
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*/
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last_state = AC_POWER_STATE;
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first_time = 0;
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return; /* We can't process events, we have no baseline */
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}
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/*
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* XXX - should we do this a bunch of times and perform some sort
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* of smoothing or correction?
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*/
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if ( ioctl(apmnorm_fd, APMIO_GETINFO, &pw_info) < 0)
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err(1, "cannot check battery state.");
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/*
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* If we're not in the state now that we were in last time,
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* then it's a transition, which means we must clean out
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* the event-caught state.
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*/
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if (last_state != AC_POWER_STATE) {
|
|
if (soft_power_state_change && fork() == 0) {
|
|
status = exec_event_cmd(&events[PMEV_POWERSTATECHANGE]);
|
|
exit(status);
|
|
}
|
|
last_state = AC_POWER_STATE;
|
|
for (p = battery_watch_list ; p!=NULL ; p = p -> next)
|
|
p->done = 0;
|
|
}
|
|
for (p = battery_watch_list ; p != NULL ; p = p -> next)
|
|
if (p -> direction == AC_POWER_STATE &&
|
|
!(p -> done) &&
|
|
((p -> type == BATTERY_PERCENT &&
|
|
p -> level == (int)pw_info.ai_batt_life) ||
|
|
(p -> type == BATTERY_MINUTES &&
|
|
p -> level == (pw_info.ai_batt_time / 60)))) {
|
|
p -> done++;
|
|
if (verbose)
|
|
syslog(LOG_NOTICE, "Caught battery event: %s, %d%s",
|
|
(p -> direction == BATTERY_CHARGING)?"charging":"discharging",
|
|
p -> level,
|
|
(p -> type == BATTERY_PERCENT)?"%":" minutes");
|
|
if (fork() == 0) {
|
|
status = exec_run_cmd(p -> cmdlist);
|
|
exit(status);
|
|
}
|
|
}
|
|
}
|
|
void
|
|
event_loop(void)
|
|
{
|
|
int fdmax = 0;
|
|
struct sigaction nsa;
|
|
fd_set master_rfds;
|
|
sigset_t sigmask, osigmask;
|
|
|
|
FD_ZERO(&master_rfds);
|
|
FD_SET(apmctl_fd, &master_rfds);
|
|
fdmax = apmctl_fd > fdmax ? apmctl_fd : fdmax;
|
|
|
|
FD_SET(signal_fd[0], &master_rfds);
|
|
fdmax = signal_fd[0] > fdmax ? signal_fd[0] : fdmax;
|
|
|
|
memset(&nsa, 0, sizeof nsa);
|
|
nsa.sa_handler = enque_signal;
|
|
sigfillset(&nsa.sa_mask);
|
|
nsa.sa_flags = SA_RESTART;
|
|
sigaction(SIGHUP, &nsa, NULL);
|
|
sigaction(SIGCHLD, &nsa, NULL);
|
|
sigaction(SIGTERM, &nsa, NULL);
|
|
|
|
sigemptyset(&sigmask);
|
|
sigaddset(&sigmask, SIGHUP);
|
|
sigaddset(&sigmask, SIGCHLD);
|
|
sigaddset(&sigmask, SIGTERM);
|
|
sigprocmask(SIG_SETMASK, &sigmask, &osigmask);
|
|
|
|
while (1) {
|
|
fd_set rfds;
|
|
int res;
|
|
struct timeval to;
|
|
|
|
to.tv_sec = BATT_CHK_INTV;
|
|
to.tv_usec = 0;
|
|
|
|
memcpy(&rfds, &master_rfds, sizeof rfds);
|
|
sigprocmask(SIG_SETMASK, &osigmask, NULL);
|
|
if ((res=select(fdmax + 1, &rfds, 0, 0, &to)) < 0) {
|
|
if (errno != EINTR)
|
|
err(1, "select");
|
|
}
|
|
sigprocmask(SIG_SETMASK, &sigmask, NULL);
|
|
|
|
if (res == 0) { /* time to check the battery */
|
|
check_battery();
|
|
continue;
|
|
}
|
|
|
|
if (FD_ISSET(signal_fd[0], &rfds)) {
|
|
if (proc_signal(signal_fd[0]) < 0)
|
|
goto out;
|
|
}
|
|
|
|
if (FD_ISSET(apmctl_fd, &rfds))
|
|
proc_apmevent(apmctl_fd);
|
|
}
|
|
out:
|
|
return;
|
|
}
|
|
|
|
int
|
|
main(int ac, char* av[])
|
|
{
|
|
int ch;
|
|
int daemonize = 1;
|
|
char *prog;
|
|
int logopt = LOG_NDELAY | LOG_PID;
|
|
|
|
while ((ch = getopt(ac, av, "df:sv")) != -1) {
|
|
switch (ch) {
|
|
case 'd':
|
|
daemonize = 0;
|
|
debug_level++;
|
|
break;
|
|
case 'f':
|
|
apmd_configfile = optarg;
|
|
break;
|
|
case 's':
|
|
soft_power_state_change = 1;
|
|
break;
|
|
case 'v':
|
|
verbose = 1;
|
|
break;
|
|
default:
|
|
err(1, "unknown option `%c'", ch);
|
|
}
|
|
}
|
|
|
|
if (daemonize)
|
|
daemon(0, 0);
|
|
|
|
#ifdef NICE_INCR
|
|
nice(NICE_INCR);
|
|
#endif
|
|
|
|
if (!daemonize)
|
|
logopt |= LOG_PERROR;
|
|
|
|
prog = strrchr(av[0], '/');
|
|
openlog(prog ? prog+1 : av[0], logopt, LOG_DAEMON);
|
|
|
|
syslog(LOG_NOTICE, "start");
|
|
|
|
if (pipe(signal_fd) < 0)
|
|
err(1, "pipe");
|
|
if (fcntl(signal_fd[0], F_SETFL, O_NONBLOCK) < 0)
|
|
err(1, "fcntl");
|
|
|
|
if ((apmnorm_fd = open(APM_NORM_DEVICEFILE, O_RDWR)) == -1) {
|
|
err(1, "cannot open device file `%s'", APM_NORM_DEVICEFILE);
|
|
}
|
|
|
|
if (fcntl(apmnorm_fd, F_SETFD, 1) == -1) {
|
|
err(1, "cannot set close-on-exec flag for device file '%s'", APM_NORM_DEVICEFILE);
|
|
}
|
|
|
|
if ((apmctl_fd = open(APM_CTL_DEVICEFILE, O_RDWR)) == -1) {
|
|
err(1, "cannot open device file `%s'", APM_CTL_DEVICEFILE);
|
|
}
|
|
|
|
if (fcntl(apmctl_fd, F_SETFD, 1) == -1) {
|
|
err(1, "cannot set close-on-exec flag for device file '%s'", APM_CTL_DEVICEFILE);
|
|
}
|
|
|
|
restart();
|
|
write_pid();
|
|
event_loop();
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|