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/* apmd.c -- APM event-monitoring daemon
* Copyright 1996, 1997 Rickard E. Faith (faith@acm.org)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <time.h>
#include <syslog.h>
#include <signal.h>
#include <paths.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include "apm.h"
#include <errno.h>
#include <string.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#ifndef DEFAULT_PROXY_NAME
#define DEFAULT_PROXY_NAME /etc/apmd_proxy
#endif
#ifndef DEFAULT_PROXY_TIMEOUT
#define DEFAULT_PROXY_TIMEOUT 30
#endif
#ifndef DEFAULT_CHECK_INTERVAL
#define DEFAULT_CHECK_INTERVAL 30
#endif
#ifndef DEFAULT_VERBOSITY
#define DEFAULT_VERBOSITY LOG_NOTICE
#endif
/* Rate calcs over shorter times than this are bogus */
#ifndef MINIMUM_RATE_CALC_TIME
#define MINIMUM_RATE_CALC_TIME 120
#endif
/*
* For the verbosity level feature to be useful,
* we rely on the fact that syslog.h assigns adjacent
* integer values to the following log level macros:
* LOG_NOTICE
* LOG_INFO
* LOG_DEBUG
* and we also assume that
* LOG_ALERT
* LOG_ERR
* LOG_WARNING
* are *less* than any of the above.
*/
#if ((defined (__STDC_VERSION__)) && (__STDC_VERSION__ >= 199901L))
#define APMD_SYSLOG(lev, ...) do \
{ \
if ((lev) <= verbosity) syslog((lev), __VA_ARGS__); \
} while(0)
#else
#ifdef __GNUC__
#define APMD_SYSLOG(lev, args...) do \
{ \
if ((lev) <= verbosity) syslog((lev), args); \
} while(0)
#endif /* __GNUC__ */
#endif /* __STDC_VERSION__ >= 199901L */
#define APMD_TRACE0(lev, fmt) \
APMD_SYSLOG ((lev), "%s(): " fmt, __FUNCTION__)
#define APMD_TRACE1(lev, fmt, arg) \
APMD_SYSLOG ((lev), "%s(): " fmt, __FUNCTION__, arg)
#define PID_FILE _PATH_VARRUN "apmd.pid"
#define MAX_EVENTS 8 /* Maximum events we accept from BIOS driver */
#define RESUME_HOURS 6 /* If resuming after N hours, show as days */
/*
* These are events generated by APMD itself. The benefit is
* that we can do a simple lookup into the event dispatch
* table. (We're trusting that the APM BIOS spec doesn't get
* updated to use these particular "reserved" codes for
* anything...)
*/
#define APMD_START 0xad00
#define APMD_STOP 0xad01
#define APMD_PSEUDO_EVENT 0xad03
/*
* This table defines how events are handled. For each event type
* there is a flag indicating whether the proxy should be run,
* and a flag indicating whether the event should be logged.
*/
struct action
{
apm_event_t event;
int call_proxy;
int log;
};
/*
* These actions are listed here in the order
* in which they will be processed when several
* of them are received at the same time
*
* N.B. CRITICAL_SUSPEND and UPDATE_TIME may not be sent
* to us by the APM subsystem, for performance reasons.
*/
static struct action actions[] = {
{APMD_START, 1, 1}, /* Generated by apmd */
/* APM_CRITICAL_SUSPEND omitted */
{APM_CRITICAL_RESUME, 1, 1},
{APM_STANDBY_RESUME, 1, 1},
{APM_NORMAL_RESUME, 1, 1},
#ifdef APM_CAPABILITY_CHANGE
{APM_CAPABILITY_CHANGE, 1, 1},
#endif
{APM_POWER_STATUS_CHANGE, 1, 1},
{APM_LOW_BATTERY, 1, 1},
{APM_SYS_STANDBY, 1, 1},
{APM_USER_STANDBY, 1, 1},
{APM_UPDATE_TIME, 1, 1},
#if doing_something_on_pseudo_events
{APMD_PSEUDO_EVENT, 0, 0}, /* Generated by apmd */
#endif
{APM_SYS_SUSPEND, 1, 1},
{APM_USER_SUSPEND, 1, 1},
{APMD_STOP, 1, 1} /* Generated by apmd */
};
#define NUM_ACTIONS (sizeof(actions)/sizeof(struct action))
/* From parsing the command line: */
static char *proxy_name = DEFAULT_PROXY_NAME;
static int proxy_timeout = -1; /* -1=never */
static int wall; /* = 0 */
static int check_interval = -1; /* -1=infinity */
static int ignore_bios_batlow; /* = 0 */
static int percent_change = 5;
static int quiet_bios_batlow; /* = 0 */
static int verbosity = DEFAULT_VERBOSITY;
static int warn_level = 10;
static uid_t apmd_uid = 0;
static int apmd_fd = -1;
#ifndef abs
#define abs(a) ((a)<0?(-(a)):(a))
#endif
#define IS_CHARGING(i) ( \
((i).battery_status == BATTERY_STATUS_CHARGING) \
|| ((i).battery_flags & BATTERY_FLAGS_CHARGING) \
)
#define IS_LOW(i) ( \
((i).battery_status == BATTERY_STATUS_LOW) \
|| ((i).battery_flags & BATTERY_FLAGS_LOW) \
)
#define IS_ABSENT(i) ( \
((i).battery_status == BATTERY_STATUS_ABSENT) \
|| ((i).battery_flags & BATTERY_FLAGS_ABSENT) \
)
#define ISNT_ON_LINE(i) ((i).ac_line_status == AC_LINE_STATUS_OFF)
static void option_barf(FILE *fd)
{
fprintf(
fd,
"apmd: Try `apmd --help' for usage information.\n"
);
}
static void usage(FILE *fd)
{
fprintf(
fd,
"Usage: apmd [-TVWciqv] [-P cmd] [-T seconds] [-c seconds]"
" [-p percent] [-v level] [-w percent] [--help]\n"
);
}
/*
* call_proxy() is a generic outcalling dispatcher. It calls a
* proxy program named by proxy_name which can do further event
* processing. Returns the code returned by the proxy program,
* which is meant to signal rejection of a suspend request
* (except that such rejection isn't supported by the kernel yet).
*/
static int call_proxy(apm_event_t event)
{
const char *argv[4] = {NULL, NULL, NULL, NULL};
int i, fds[2];
pid_t pid;
char line[256];
APMD_TRACE1(LOG_DEBUG, "0x%04x", event);
if (!strlen(proxy_name)) {
/* Proxy name set to null string */
return 0;
}
for (i=0; i<NUM_ACTIONS; i++) {
if (actions[i].event == event)
break;
}
if (i == NUM_ACTIONS) {
APMD_TRACE0(LOG_ERR, "Unrecognized event!!!");
return 0;
}
if (!actions[i].call_proxy) {
/* We don't call the proxy for this kind of event */
return 0;
}
if (access(proxy_name, X_OK)) {
/* Not executable. This is not considered an error. */
APMD_SYSLOG(LOG_INFO, "No executable proxy: %s", proxy_name );
return 0;
}
argv[0] = proxy_name;
/* Add the arguments depending on event type */
switch (event)
{
/* APM_CRITICAL_SUSPEND omitted */
case APM_SYS_SUSPEND:
argv[1] = "suspend";
argv[2] = "system";
break;
case APM_USER_SUSPEND:
argv[1] = "suspend";
argv[2] = "user";
break;
case APM_SYS_STANDBY:
argv[1] = "standby";
argv[2] = "system";
break;
case APM_USER_STANDBY:
argv[1] = "standby";
argv[2] = "user";
break;
case APM_CRITICAL_RESUME:
argv[1] = "resume";
argv[2] = "critical";
break;
case APM_NORMAL_RESUME:
argv[1] = "resume";
argv[2] = "suspend";
break;
case APM_STANDBY_RESUME:
argv[1] = "resume";
argv[2] = "standby";
break;
case APM_LOW_BATTERY:
argv[1] = "change";
argv[2] = "battery";
break;
case APM_POWER_STATUS_CHANGE:
argv[1] = "change";
argv[2] = "power";
break;
case APM_UPDATE_TIME:
argv[1] = "change";
argv[2] = "time";
break;
case APMD_START:
argv[1] = "start";
break;
case APMD_STOP:
argv[1] = "stop";
break;
#ifdef APM_CAPABILITY_CHANGE
case APM_CAPABILITY_CHANGE:
argv[1] = "change";
argv[2] = "capability";
break;
#endif
default:
// should never happen
APMD_TRACE0(LOG_ERR, "Unrecognized event!!!");
return 0;
} /* switch */
if (pipe(fds)) {
APMD_TRACE1(LOG_ERR, "Can't open fds for proxy: %s", strerror(errno));
return 0;
}
if (argv[2] == NULL) {
APMD_SYSLOG(LOG_INFO, "Executing proxy: '%s' '%s'", argv[0], argv[1]);
} else {
APMD_SYSLOG(LOG_INFO, "Executing proxy: '%s' '%s' '%s'", argv[0], argv[1], argv[2]);
}
pid = fork();
if (pid == 0) {
/* child */
close(fds[0]);
/* Don't inherit stdin; use /dev/null instead */
close(0);
open("/dev/null", O_RDONLY);
/* Send stdout and stderr to the pipe */
dup2(fds[1], 1);
dup2(fds[1], 2);
/* Don't close stdin|out|err on exec */
fcntl(0, F_SETFD, 0);
fcntl(1, F_SETFD, 0);
fcntl(2, F_SETFD, 0);
execvp(argv[0], (char **)argv);
_exit(142); /* We only do this if the execvp fails */
} else {
/* parent */
int status, retval;
ssize_t len;
time_t countdown;
if (pid < 0) {
/* Couldn't fork */
APMD_TRACE1(0, "Couldn't fork: %s", strerror(errno));
return 0;
}
/* Forked */
/* Capture the child's output, if any, but only until it terminates */
close(fds[1]);
fcntl(fds[0], F_SETFL, O_RDONLY|O_NONBLOCK);
countdown = proxy_timeout;
do {
countdown -= 1;
while ((len = read(fds[0], line, sizeof(line)-1)) > 0) {
line[len] = 0;
APMD_SYSLOG(LOG_INFO, "+ %s", line);
}
retval = waitpid(pid, &status, WNOHANG);
if (retval == pid)
goto proxy_done;
if (retval < 0) {
APMD_TRACE1(LOG_ERR, "waitpid() failed: %s", strerror(errno));
status = __W_EXITCODE(0, SIGTERM) | __WCOREFLAG;
goto proxy_done;
}
while (sleep(1) > 0) ;
} while (
(countdown >= 0)
|| (proxy_timeout < 0)
);
APMD_SYSLOG(LOG_NOTICE, "Proxy has been running more than %d seconds; killing it", proxy_timeout);
kill(pid, SIGTERM);
countdown = 5;
do {
retval = waitpid(pid, &status, WNOHANG);
if (retval == pid)
goto proxy_done;
if (retval < 0) {
APMD_TRACE1(LOG_ERR, "waitpid() failed: %s", strerror(errno));
status = __W_EXITCODE(0, SIGTERM) | __WCOREFLAG;
goto proxy_done;
}
while (sleep(1) > 0) ;
} while (countdown >= 0);
kill(pid, SIGKILL);
status = __W_EXITCODE(0, SIGKILL);
proxy_done:
/* Flush any remaining data */
while ((len = read(fds[0], line, sizeof(line)-1)) > 0) {
line[len] = 0;
APMD_SYSLOG(LOG_INFO, "+ %s", line);
}
close(fds[0]);
/* Collect the exit code */
if (WIFEXITED(status)) {
APMD_SYSLOG(
WEXITSTATUS(status) ? LOG_NOTICE : LOG_DEBUG,
"Proxy exited with status %d",
WEXITSTATUS(status)
);
return WEXITSTATUS(status);
} else {
APMD_SYSLOG(LOG_NOTICE, "Proxy exited on signal %d", WTERMSIG(status));
return 0;
}
}
}
static inline int apmd_time(apm_info * apmi)
{
return (apmi->battery_time * (apmi->using_minutes ? 60 : 1));
}
static char *ac_line_status_descr (int status)
{
if (status == AC_LINE_STATUS_OFF)
return "battery";
else if (status == AC_LINE_STATUS_ON)
return "line";
else if (status == AC_LINE_STATUS_BACKUP)
return "backup";
else
return "?";
}
static const char *battery_status_descr (apm_info * apmi)
{
return
IS_ABSENT(*apmi) ?
"absent" :
IS_CHARGING(*apmi) ?
"charging" :
ISNT_ON_LINE(*apmi) ?
"discharging" : "not charging";
}
/*
* Generic logging function. Depending on the event type
* and actions table, the event may or may not be logged.
*/
static void apmd_log_event(apm_event_t event, char *msg)
{
int i;
for (i=0; i<NUM_ACTIONS; i++) {
if (actions[i].event == event)
break;
}
if (i == NUM_ACTIONS)
return;
if (actions[i].log) {
APMD_SYSLOG(LOG_INFO, "%s", msg);
}
return;
}
static int apmd_suspend(void)
{
int result;
APMD_SYSLOG(LOG_NOTICE, "Suspending now");
sync();
sleep(0); /* let syslogd write messages */
sync();
result = apm_suspend(apmd_fd);
if (result == -EBUSY) {
APMD_SYSLOG(LOG_NOTICE, "Suspension was rejected by the kernel, so resuming");
call_proxy(APM_NORMAL_RESUME);
}
return result;
}
static int apmd_standby(void)
{
APMD_SYSLOG(LOG_NOTICE, "Standing by now");
sync();
sleep(0); /* let syslogd write messages */
sync();
return apm_standby(apmd_fd);
}
/*
* Take account of the event; call proxy; warn; log; etc.
*/
static void handle_event(apm_event_t event, apm_info * apmi)
{
int do_log_batstatus = 0;
int do_notify_batlow = 0, do_warn_batlow = 0, do_proxy_batlow = 0;
int do_mark = 0, do_suspend = 0, do_standby = 0;
int len = 0;
char msg[512];
static time_t last_marked_time;
static int last_marked_content;
static int last_logged_content;
static int last_ac_line_status;
static int last_battery_charging;
static int last_battery_absent;
static int suppress_bios_batlow;
static int suppress_apmd_batlow;
APMD_TRACE1(LOG_DEBUG, "0x%04x", event);
/* Call proxy and perform special logging as needed */
switch (event)
{
case APM_CRITICAL_SUSPEND:
/* Do it fast */
last_marked_time = time(0);
last_marked_content = apmi->battery_percentage;
ioctl(apmd_fd, APM_IOC_SUSPEND, NULL);
break;
case APMD_START:
/* Initialise */
call_proxy(event);
last_marked_time = time(0);
last_marked_content = apmi->battery_percentage;
last_logged_content = -1;
last_ac_line_status = apmi->ac_line_status;
last_battery_charging = IS_CHARGING(*apmi);
last_battery_absent = IS_ABSENT(*apmi);
suppress_bios_batlow = 0;
suppress_apmd_batlow = 0;
return; /* Yes, return */
case APM_SYS_SUSPEND:
case APM_USER_SUSPEND:
switch (event)
{
case APM_SYS_SUSPEND: apmd_log_event(event, "System Suspend"); break;
case APM_USER_SUSPEND: apmd_log_event(event, "User Suspend"); break;
}
do_suspend = 1;
if (call_proxy(event)) {
APMD_SYSLOG(LOG_NOTICE, "Suspend rejected by proxy");
if (apm_reject(apmd_fd) == -EINVAL) {
APMD_SYSLOG(LOG_INFO, "Rejection is not supported by the apm subsystem. Proceeding with suspend.");
} else {
/* Rejection succeeded */
do_suspend = 0;
}
}
do_log_batstatus = 1;
do_mark = 1;
break;
case APM_SYS_STANDBY:
case APM_USER_STANDBY:
switch (event)
{
case APM_SYS_STANDBY: apmd_log_event(event, "System Standby"); break;
case APM_USER_STANDBY: apmd_log_event(event, "User Standby"); break;
}
do_standby = 1;
if (call_proxy(event)) {
APMD_SYSLOG(LOG_NOTICE, "Standby rejected by proxy");
if (apm_reject(apmd_fd) == -EINVAL) {
APMD_SYSLOG(LOG_INFO, "Rejection is not supported by the apm subsystem. Proceeding with standby.");
} else {
/* Rejection succeeded */
do_standby = 0;
}
}
do_log_batstatus = 1;
do_mark = 1;
break;
case APM_CRITICAL_RESUME:
case APM_NORMAL_RESUME:
case APM_STANDBY_RESUME:
switch(event)
{
case APM_CRITICAL_RESUME: apmd_log_event(event, "Critical Resume"); break;
case APM_NORMAL_RESUME: apmd_log_event(event, "Normal Resume"); break;
case APM_STANDBY_RESUME: apmd_log_event(event, "Standby Resume"); break;
}
call_proxy(event);
do_log_batstatus = 1;
do_mark = 1;
suppress_bios_batlow = 0;
suppress_apmd_batlow = 0;
break;
case APM_UPDATE_TIME:
apmd_log_event(event, "Update Time");
call_proxy(event);
do_mark = 1;
break;
case APM_POWER_STATUS_CHANGE:
/*
* With some APM BIOSes, power status changes can happen a LOT,
* e.g., for each change of estimated battery life (minutes,
* seconds, percent) when charging or discharging, battery full,
* empty, add/remove battery, etc. Invoking the proxy on every
* such event could be wasteful. Therefore, we just check
* (below) for power source changes.
*/
/* apmd_log_event(event, "Power Status Change"); */
sleep(1); /* Wait for info to be updated after the change */
if(apm_read(apmi))
return;
break;
case APM_LOW_BATTERY:
if (!ignore_bios_batlow && !suppress_bios_batlow && !suppress_apmd_batlow) {
if (!quiet_bios_batlow)
do_notify_batlow = 1;
do_proxy_batlow = 1;
}
suppress_bios_batlow = 1;
break;
#ifdef APM_CAPABILITY_CHANGE
case APM_CAPABILITY_CHANGE:
apmd_log_event(event, "Capability Change");
call_proxy(event);
break;
#endif
case APMD_PSEUDO_EVENT:
#if doing_something_on_pseudo_events
apmd_log_event(event, "Performing APM status check");
call_proxy(event);
#endif
break;
default:
/* These aren't errors; see the APM BIOS 1.2 spec.
* 0x000d-0x00ff reserved system events
* 0x0100-0x01ff reserved device events
* 0x0200-0x02ff OEM-defined
* 0x0300-0xffff reserved
*/
APMD_SYSLOG(LOG_ERR, "Received unknown event 0x%04x!!", event);
break;
} /* switch */
/*
* Check for power source or charging changes.
*
* The main use for this is to give the proxy program the
* opportunity to reduce power consumption when running
* on batteries or charging them.
*/
if (
apmi->ac_line_status != last_ac_line_status
|| IS_CHARGING(*apmi) != last_battery_charging
) {
sprintf(
msg,
"Using %s power%s%s%s",
ac_line_status_descr(apmi->ac_line_status),
ISNT_ON_LINE(*apmi) ? "" : "; ",
ISNT_ON_LINE(*apmi) ? "" : battery_status_descr(apmi),
ISNT_ON_LINE(*apmi) ? "" : " battery"
);
apmd_log_event(APM_POWER_STATUS_CHANGE, msg);
call_proxy(APM_POWER_STATUS_CHANGE);
do_log_batstatus = 1;
do_mark = 1;
suppress_bios_batlow = 0;
suppress_apmd_batlow = 0;
last_ac_line_status = apmi->ac_line_status;
last_battery_charging = IS_CHARGING(*apmi);
}
/*
* Check for battery insertion or removal
*/
if (
IS_ABSENT(*apmi) != last_battery_absent
) {
do_log_batstatus = 1;
last_battery_absent = IS_ABSENT(*apmi);
}
/*
* Some BIOSes fail to generate LOW BATTERY events,
* so we generate our own.
*/
if (!ignore_bios_batlow) {
if (
IS_LOW(*apmi)
&& !IS_CHARGING(*apmi)
&& ISNT_ON_LINE(*apmi)
) {
if (!suppress_bios_batlow && !suppress_apmd_batlow) {
if (!quiet_bios_batlow)
do_notify_batlow = 1;
do_proxy_batlow = 1;
}
suppress_bios_batlow = 1;
} else {
suppress_bios_batlow = 0;
}
}
if (
warn_level >= 0
&& apmi->battery_percentage >= 0
&& apmi->battery_percentage <= 100
) {
if (
apmi->battery_percentage <= warn_level
&& !IS_CHARGING(*apmi)
&& ISNT_ON_LINE(*apmi)
) {
if (!suppress_bios_batlow && !suppress_apmd_batlow) {
do_notify_batlow = 1;
do_proxy_batlow = 1;
}
suppress_apmd_batlow = 1;
} else {
suppress_apmd_batlow = 0;
}
}
if ( do_notify_batlow ) {
FILE *str;
syslog(LOG_ALERT, "Warning: %s", "BATTERY IS LOW");
/* Details will be given below if available */
if (wall) {
str = popen("wall", "w");
fprintf(str, "Warning: %s\n", "BATTERY IS LOW");
pclose(str);
}
}
if ( do_proxy_batlow ) {
call_proxy(APM_LOW_BATTERY);
}
/*
* If battery is now full or empty, reset charge rate calcs
*/
if (
(apmi->battery_percentage == 0 && last_marked_content != 0)
|| (apmi->battery_percentage == 100 && last_marked_content != 100)
)
do_mark = 1;
do_warn_batlow = do_notify_batlow;
if (
(apmi->battery_percentage >= 0 && apmi->battery_percentage <= 100)
&& apmi->battery_percentage != last_logged_content
&& apmi->battery_percentage <= warn_level
&& !IS_CHARGING(*apmi)
&& ISNT_ON_LINE(*apmi)
)
do_warn_batlow = 1;
if (
(apmi->battery_percentage >= 0 && apmi->battery_percentage <= 100)
&& apmi->battery_percentage != last_logged_content
&& (
apmi->battery_percentage == 0
|| apmi->battery_percentage == 100
)
)
do_log_batstatus = 1;
if (
(apmi->battery_percentage >= 0 && apmi->battery_percentage <= 100)
&& apmi->battery_percentage != last_logged_content
&& abs(apmi->battery_percentage - last_logged_content) >= percent_change
)
do_log_batstatus = 1;
if ( IS_ABSENT(*apmi) ) {
/* Battery absent */
len = sprintf(
msg,
"Battery: %s",
battery_status_descr(apmi)
);
} else if (apmi->battery_percentage < 0 || apmi->battery_percentage > 100) {
/* Battery content value invalid */
len = sprintf(
msg,
"Battery: ?%%, %s",
battery_status_descr(apmi)
);
} else {
/* Current battery content percentage value OK */
int dt = time(0) - last_marked_time;
int dp = apmi->battery_percentage - last_marked_content;
int do_estimate_rate =
last_marked_time > 0
&& dt > 0
&& last_marked_content >= 0
&& last_marked_content <= 100;
len = sprintf(
msg,
"Battery: %d%%, %s",
apmi->battery_percentage,
battery_status_descr(apmi)
);
if (
event == APM_CRITICAL_RESUME
|| event == APM_NORMAL_RESUME
|| event == APM_STANDBY_RESUME
) {
/* We are resuming */
if ( do_estimate_rate ) {
if (
dt > (60 * 60 * RESUME_HOURS)
&& !IS_CHARGING(*apmi)
&& dp < 0
) {
/*
* Suspend lasted a long time, so print the
* discharge rate in percentage points per day
*/
len += sprintf(
msg + len,
" (%+.2f%%/day over %s)",
60 * 60 * 24 * (double)dp / (double)dt,
apm_time(dt)
);
} else {
/*
* Suspend didn't last a long time, so just print
* the change in content
*/
len += sprintf(
msg + len,
" (%+d%% over %s)",
dp,
apm_time(dt)
);
}
}
} else {
/* We are not resuming */
double ppm = dt ? (60. * (double)dp / (double)dt) : -1;
if (
do_estimate_rate
&& dt >= MINIMUM_RATE_CALC_TIME
&& (
(dp > 0 && IS_CHARGING(*apmi))
|| (dp < 0 && !IS_CHARGING(*apmi))
)
&& ppm <= 10. /* Battery charging faster than 10%/min? Bogus! */
) {
len += sprintf(
msg + len,
" (%+.2f%%/min over %s)",
ppm,
apm_time(dt)
);
}
len += sprintf(
msg + len,
", %s",
apm_time(apmd_time(apmi))
);
if (
do_estimate_rate
&& dt >= MINIMUM_RATE_CALC_TIME
&& dp > 0
&& IS_CHARGING(*apmi)
) {
len += sprintf(
msg + len,
" to empty (%s to full)",
apm_time((int)( (100 - apmi->battery_percentage) * (double)dt/dp ))
);
} else if (
do_estimate_rate
&& dt >= MINIMUM_RATE_CALC_TIME
&& dp < 0
&& !IS_CHARGING(*apmi)
) {
len += sprintf(
msg + len,
" (%s) to empty",
apm_time((int)( apmi->battery_percentage * (double)dt/-dp ))
);
} else {
/* Rate is not valid */
len += sprintf(
msg + len,
" to empty"
);
}
}
}
if (do_warn_batlow) {
syslog(LOG_ALERT, "Warning: %s", msg);
last_logged_content = apmi->battery_percentage;
} else if (do_log_batstatus) {
APMD_SYSLOG(LOG_INFO, "%s", msg);
last_logged_content = apmi->battery_percentage;
}
if (do_mark) {
last_marked_time = time(0);
last_marked_content = apmi->battery_percentage;
}
if (do_suspend)
apmd_suspend();
if (do_standby)
apmd_standby();
return;
}
static void sig_handler(int sig)
{
APMD_SYSLOG(LOG_INFO, "Exiting");
call_proxy(APMD_STOP);
unlink(PID_FILE);
exit(0);
}
int main(int argc, char **argv)
{
int c;
int pid;
FILE *str;
apm_info apminfo;
apm_event_t events[MAX_EVENTS];
static struct option longopts[] =
{
{"proxy", required_argument, NULL, 'P'},
{"apmd-proxy", required_argument, NULL, 'P'},
{"apmd_proxy", required_argument, NULL, 'P'},
{"proxy-timeout", optional_argument, NULL, 'T'},
{"proxy_timeout", optional_argument, NULL, 'T'},
{"apmd-proxy-timeout", optional_argument, NULL, 'T'},
{"apmd_proxy_timeout", optional_argument, NULL, 'T'},
{"version", no_argument, NULL, 'V'},
{"wall", no_argument, NULL, 'W'},
{"check", optional_argument, NULL, 'c'},
{"ignore-bios-battery-low", no_argument, NULL, 'i'},
{"ignore_bios_battery_low", no_argument, NULL, 'i'},
{"percentage", required_argument, NULL, 'p'},
{"quiet-bios-battery-low", no_argument, NULL, 'q'},
{"quiet_bios_battery_low", no_argument, NULL, 'q'},
{"verbose", optional_argument, NULL, 'v'},
{"warn", required_argument, NULL, 'w'},
{"help", no_argument, NULL, 'h'},
{0, 0, 0, 0}
};
switch (apm_exists())
{
case 1:
fprintf(stderr, "No APM support in kernel\n");
exit(1);
case 2:
fprintf(stderr, "Old APM support in kernel\n");
exit(2);
} /* switch */
opterr = 1; /* Switch on getopt() error message */
while ((c=getopt_long(argc, argv, "P:T::VWc::ip:quv::w:", longopts, NULL)) != -1) {
switch (c)
{
case 'P':
if (optarg)
proxy_name = optarg;
break;
case 'T':
if (optarg) {
proxy_timeout = atoi(optarg);
} else if (
optind<argc
&& argv[optind][0]!='-'
) {
/*
* The next arg is not an option so we
* treat it as the argument of this option.
*
* getopt() does not return this to us via optarg
* because an argument is optional for this option
*/
proxy_timeout = atoi(argv[optind]);
optind++;
} else {
/* no argument */
proxy_timeout = DEFAULT_PROXY_TIMEOUT;
}
if (proxy_timeout < 0)
proxy_timeout = -1; /* "never" */
break;
case 'V':
fprintf(stderr, "apmd version %s\n", VERSION);
exit(0);
break;
case 'W':
++wall;
break;
case 'c':
if (optarg) {
check_interval = atoi(optarg);
} else if (
optind<argc
&& argv[optind][0]!='-'
) {
/*
* The next arg is not an option so we
* treat it as the argument of this option.
*
* getopt() does not return this to us via optarg
* because an argument is optional for this option
*/
check_interval = atoi(argv[optind]);
optind++;
} else {
/* no argument */
check_interval = DEFAULT_CHECK_INTERVAL;
}
if (check_interval < 0)
check_interval = -1; /* "infinity" */
break;
case 'h':
usage(stdout);
exit(0);
break;
case 'i':
++ignore_bios_batlow;
break;
case 'p':
if (optarg)
percent_change = atoi(optarg);
if (percent_change < 0)
percent_change = 0; /* "always" */
break;
case 'q':
++quiet_bios_batlow;
break;
case 'u':
fprintf(
stderr,
"WARNING: The -u option has been eliminated.\n"
" To set the clock to UTC, use the proxy.\n"
);
break;
case 'v':
if (optarg) {
verbosity = atoi(optarg);
} else if (
optind<argc
&& argv[optind][0]!='-'
) {
/*
* The next arg is not an option so we
* treat it as the argument of this option.
*
* getopt() does not return this to us via optarg
* because an argument is optional for this option
*/
verbosity = atoi(argv[optind]);
optind++;
} else {
/* no argument */
verbosity++;
}
break;
case 'w':
if (optarg)
warn_level = atoi(optarg);
break;
case '?':
case ':':
default:
/* getopt() prints an error message */
/* Add our own message */
option_barf(stderr);
exit(1);
break;
} /* switch */
} /* while */
/* Reject badly formed options */
if (optind<argc) {
fprintf(stderr, "apmd: Unrecognized argument `%s'\n", argv[optind]);
option_barf(stderr);
exit(1);
}
/* Reject badly formed option arguments */
if (proxy_timeout == 0) {
fprintf(stderr, "apmd: Illegal value for proxy timeout: 0\n");
fprintf(stderr, "apmd: To disable this feature, set the timeout to a negative value.\n");
exit(1);
}
/* Reject badly formed option arguments */
if (check_interval == 0) {
fprintf(stderr, "apmd: Illegal value for check interval: 0\n");
fprintf(stderr, "apmd: To disable this feature, set the interval to a negative value.\n");
exit(1);
}
if (!access(PID_FILE, R_OK)) {
if ((str = fopen(PID_FILE, "r"))) {
fscanf(str, "%d", &pid);
fclose(str);
if (!kill(pid, 0) || errno == EPERM) {
fprintf(
stderr,
"It appears that an instance of apmd is already running as process %d.\n"
"If in reality no instance of apmd is running, remove %s.\n",
pid,
PID_FILE
);
exit(1);
}
}
}
if ((apmd_uid = getuid())) {
fprintf(stderr, "apmd: must be run as root\n");
exit(1);
}
openlog("apmd", (verbosity>=LOG_DEBUG)?LOG_PERROR:0 | LOG_PID | LOG_CONS, LOG_DAEMON);
/* Set up signal handler */
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, sig_handler);
if (signal(SIGQUIT, SIG_IGN) != SIG_IGN)
signal(SIGQUIT, sig_handler);
if (signal(SIGTERM, SIG_IGN) != SIG_IGN)
signal(SIGTERM, sig_handler);
/* Write the pidfile */
if ((pid = fork())) {
/* parent */
if (pid < 0) {
APMD_TRACE0(LOG_ERR, "fork() failed: %m");
unlink(PID_FILE);
exit(1);
}
/* We forked */
if ((str = fopen(PID_FILE, "w"))) {
fprintf(str, "%d\n", pid);
fclose(str);
}
exit(0);
}
/*
* child
*
* Follow the daemon rules in W. Richard Stevens,
* _Advanced Programming in the UNIX Environment_,
* Addison-Wesley Publishing Co., 1992, p. 417.
*/
if (setsid() < 0) {
APMD_TRACE0(LOG_ERR, "setsid() failed: %m");
unlink(PID_FILE);
exit(1);
}
chdir("/");
close(0);
close(1);
if (verbosity < LOG_DEBUG)
close(2);
umask(0);
apmd_fd = open(APM_DEVICE, O_RDWR);
if (apmd_fd < 0) {
APMD_TRACE0(LOG_ERR, "open() failed: %m");
unlink(PID_FILE);
exit(1);
}
/* apmd_fd is good */
if (apm_read(&apminfo)) {
APMD_TRACE0(LOG_ERR, "apm_read() failed: %m");
unlink(PID_FILE);
exit(1);
}
/* apm_read() works */
APMD_SYSLOG(
LOG_NOTICE,
"apmd %s interfacing with apm driver %s and APM BIOS %d.%d",
VERSION,
apminfo.driver_version,
apminfo.apm_version_major, apminfo.apm_version_minor
);
APMD_SYSLOG(
LOG_INFO,
"apmd operating parameters: -T %d, -c %d, -p %d, -v %d, -w %d",
proxy_timeout,
check_interval,
percent_change,
verbosity,
warn_level
);
handle_event(APMD_START, &apminfo);
for (;;)
{
int num_events = apm_get_events(apmd_fd, check_interval, events, MAX_EVENTS);
int e, a;
apm_read(&apminfo);
if (num_events == 0) {
/* The call timed out */
handle_event(APMD_PSEUDO_EVENT, &apminfo);
continue;
}
/* num_events > 0 */
for (a = 0; a < NUM_ACTIONS; a++) /* Process events in actions-table order */
for (e = 0; e < num_events; e++) /* ... and then in order received */
{
apm_event_t event = events[e];
if (event != actions[a].event)
continue;
APMD_SYSLOG(
LOG_DEBUG,
"APM event 0x%04x: %s",
event,
apm_event_name(event)
);
handle_event(event, &apminfo);
} /* for for */
} /* for */
return 0;
}
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