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sleepd.c
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sleepd.c
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/*
* sleep daemon
*
* Copyright 2000-2008 Joey Hess <joeyh@kitenet.net> under the terms of the
* GNU GPL.
*/
#include <unistd.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <syslog.h>
#include <time.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <apm.h>
#include <utmp.h>
#include "acpi.h"
#ifdef HAL
#include "simplehal.h"
#endif
#include <errno.h>
#include <pthread.h>
#include "eventmonitor.h"
#include <signal.h>
#include "sleepd.h"
int irqs[MAX_IRQS]; /* irqs to examine have a value of 1 */
int autoprobe=1;
int have_irqs=0;
int use_events=1;
int max_unused=10 * 60; /* in seconds */
int ac_max_unused=0;
char *apm_sleep_command="apm -s";
char *acpi_sleep_command="pm-suspend";
char *sleep_command=NULL;
char *hibernate_command=NULL;
int daemonize=1;
int sleep_time = DEFAULT_SLEEP_TIME;
int no_sleep=0;
signed int min_batt=-1;
#ifdef HAL
int use_simplehal = 0;
#endif
int use_acpi=0;
int require_unused_and_battery=0; /* --and or -A option */
double max_loadavg = 0;
int use_utmp=0;
int use_net=0;
int min_tx=TXRATE;
int min_rx=RXRATE;
char netdevtx[MAX_NET][44];
char netdevrx[MAX_NET][44];
int debug=0;
void usage () {
fprintf(stderr, "Usage: sleepd [-s command] [-d command] [-u n] [-U n] [-I] [-i n] [-E] [-e filename] [-a] [-l n] [-w] [-n] [-v] [-c n] [-b n] [-A] [-N [dev] [-t n] [-r n]]\n");
}
void parse_command_line (int argc, char **argv) {
extern char *optarg;
struct option long_options[] = {
{"nodaemon", 0, NULL, 'n'},
{"verbose", 0, NULL, 'v'},
{"unused", 1, NULL, 'u'},
{"ac-unused", 1, NULL, 'U'},
{"load", 1, NULL, 'l'},
{"utmp", 0, NULL, 'w'},
{"no-irq", 0, NULL, 'I'},
{"irq", 1, NULL, 'i'},
{"no-events", 0, NULL, 'E'},
{"event", 1, NULL, 'e'},
{"help", 0, NULL, 'h'},
{"sleep-command", 1, NULL, 's'},
{"hibernate-command", 1, NULL, 'd'},
{"auto", 0, NULL, 'a'},
{"check-period", 1, NULL, 'c'},
{"battery", 1, NULL, 'b'},
{"and", 0, NULL, 'A'},
{"netdev", 2, NULL, 'N'},
{"rx-min", 1, NULL, 'r'},
{"tx-min", 1, NULL, 't'},
{0, 0, 0, 0}
};
int force_autoprobe=0;
int noirq=0;
int i;
int c=0;
int event=0;
int netcount=0;
int result;
char tmpdev[8];
char tx_statfile[44];
char rx_statfile[44];
while (c != -1) {
c=getopt_long(argc,argv, "s:d:nvu:U:l:wIi:Ee:hac:b:AN::r:t:", long_options, NULL);
switch (c) {
case 's':
sleep_command=strdup(optarg);
break;
case 'd':
hibernate_command=strdup(optarg);
break;
case 'n':
daemonize=0;
break;
case 'v':
debug=1;
break;
case 'u':
max_unused=atoi(optarg);
break;
case 'U':
ac_max_unused=atoi(optarg);
break;
case 'l':
max_loadavg=atof(optarg);
break;
case 'w':
use_utmp=1;
break;
case 'i':
i = atoi(optarg);
if ((i < 0) || (i >= MAX_IRQS)) {
fprintf(stderr, "sleepd: bad irq number %d\n", i);
exit(1);
}
irqs[atoi(optarg)]=1;
autoprobe=0;
have_irqs=1;
break;
case 'e':
result = access(optarg, R_OK);
switch(result) {
case 0:
strncpy(eventData.events[event], optarg,127);
use_events=1;
event++;
break;
case ELOOP:
case ENAMETOOLONG:
case ENOENT:
case ENOTDIR:
case EFAULT:
fprintf(stderr, "sleepd: event file not found: %s\n", optarg);
exit(1);
case EACCES:
fprintf(stderr, "sleepd: can't read %s\n", optarg);
exit(1);
}
break;
case 'E':
use_events=0;
break;
case 'a':
force_autoprobe=1;
break;
case 'I':
noirq=1;
break;
case 'h':
usage();
exit(0);
break;
case 'c':
sleep_time=atoi(optarg);
if (sleep_time <= 0) {
fprintf(stderr, "sleepd: bad sleep time %d\n", sleep_time);
exit(1);
}
break;
case 'b':
min_batt=atoi(optarg);
if (min_batt < 0) {
fprintf(stderr, "sleepd: bad minimumn battery percentage %d\n", min_batt);
exit(1);
}
break;
case 'N':
if (optarg == NULL) {
if (netcount == 0) {
sprintf(tmpdev, "eth0");
}
else {
fprintf(stderr, "sleepd: multiple -N options with no arguments\n");
exit(1);
}
}
else {
strncpy(tmpdev, optarg, 8);
}
sprintf(tx_statfile, TXFILE, tmpdev);
sprintf(rx_statfile, RXFILE, tmpdev);
if ((access(tx_statfile, R_OK) == 0) &&
(access(rx_statfile, R_OK) == 0)) {
strncpy(netdevtx[netcount], tx_statfile, 44);
strncpy(netdevrx[netcount], rx_statfile, 44);
use_net=1;
netcount++;
}
else {
fprintf(stderr, "sleepd: %s not found in sysfs\n", tmpdev);
exit(1);
}
break;
case 't':
min_tx = atoi(optarg);
break;
case 'r':
min_rx = atoi(optarg);
break;
case 'A':
require_unused_and_battery=1;
break;
}
}
if (optind < argc) {
usage();
exit(1);
}
if (use_events)
strncpy(eventData.events[event], "", 1);
if (use_net)
strncpy(netdevtx[netcount], "", 1);
strncpy(netdevrx[netcount], "", 1);
if (noirq)
autoprobe=0;
if (force_autoprobe)
autoprobe=1;
}
void loadcontrol (int signum) {
int f;
char buf[8];
if (((f=open(CONTROL_FILE, O_RDONLY)) == -1) ||
(flock(f, LOCK_SH) == -1) ||
(read(f, buf, 7) == -1))
return;
no_sleep=atoi(buf);
close(f);
signal(SIGHUP, loadcontrol);
}
void writecontrol (int value) {
int f;
char buf[10];
if ((f=open(CONTROL_FILE, O_WRONLY | O_CREAT, 0644)) == -1) {
perror(CONTROL_FILE);
}
snprintf(buf, 9, "%i\n", value);
write(f, buf, strlen(buf));
close(f);
}
/**** stat the device file to get an idle time */
// Copied from w.c in procps by Charles Blake
int idletime (const char *tty) {
struct stat sbuf;
if (stat(tty, &sbuf) != 0)
return 0;
return (int)(time(NULL) - sbuf.st_atime);
}
int check_irqs (int activity, int autoprobe) {
static long irq_count[MAX_IRQS]; /* holds previous counters of the irqs */
static int probed=0;
static int no_dev_warned=0;
FILE *f;
char line[64];
int i;
f=fopen(INTERRUPTS, "r");
if (! f) {
perror(INTERRUPTS);
exit(1);
}
while (fgets(line,sizeof(line),f)) {
long v;
int do_this_one=0;
if (autoprobe) {
/* Lowercase line. */
for(i=0;line[i];i++)
line[i]=tolower(line[i]);
/* See if it is a keyboard or mouse. */
if (strstr(line, "mouse") != NULL ||
strstr(line, "keyboard") != NULL ||
/* 2.5 kernels report by chipset,
* this is a ps/2 keyboard/mouse. */
strstr(line, "i8042") != NULL) {
do_this_one=1;
probed=1;
}
}
if (sscanf(line,"%d: %ld",&i, &v) == 2 &&
i < MAX_IRQS &&
(do_this_one || irqs[i]) && irq_count[i] != v) {
if (debug)
printf("sleepd: activity: irq %d\n", i);
activity=1;
irq_count[i] = v;
}
}
fclose(f);
if (autoprobe && ! probed) {
if (! no_dev_warned) {
no_dev_warned=1;
syslog(LOG_WARNING, "no keyboard or mouse irqs autoprobed");
}
}
return activity;
}
int check_net (int activity) {
static long tx_count[MAX_NET]; /* holds previous counters of tx packets */
static long rx_count[MAX_NET]; /* holds previous counters of rx packets */
long tx,rx;
int i;
for (i=0; i < MAX_NET; i++) {
if (strncmp(netdevtx[i], "", 1) != 0) {
char line[64];
FILE *f=fopen(netdevtx[i], "r");
if (fgets(line,sizeof(line),f)) {
tx = strtol(line, (char **) NULL, 10);
}
else {
fprintf(stderr, "sleepd: could not read %s\n", netdevtx[i]);
exit(1);
}
fclose(f);
f=fopen(netdevrx[i], "r");
if (fgets(line,sizeof(line),f)) {
rx = strtol(line, (char **) NULL, 10);
}
else {
fprintf(stderr, "sleepd: could not read %s\n", netdevrx[i]);
exit(1);
}
fclose(f);
if (((tx - tx_count[i])/sleep_time > min_tx) ||
((rx - rx_count[i])/sleep_time > min_rx)) {
if (debug) {
printf("sleepd: activity: network txrate: %ld rxrate: %ld\n",
(tx - tx_count[i])/sleep_time, (rx - rx_count[i])/sleep_time);
}
activity=1;
}
tx_count[i]=tx;
rx_count[i]=rx;
}
else {
break;
}
}
return activity;
}
int check_utmp (int total_unused) {
/* replace total_unused with the minimum of
* total_unused and the shortest utmp idle time. */
typedef struct utmp utmp_t;
utmp_t *u;
int min_idle=2*max_unused;
utmpname(UTMP_FILE);
setutent();
while ((u=getutent())) {
if (u->ut_type == USER_PROCESS) {
/* get tty. From w.c in procps by Charles Blake. */
char tty[5 + sizeof u->ut_line + 1] = "/dev/";
int i;
for (i=0; i < sizeof u->ut_line; i++) {
/* clean up tty if garbled */
if (isalnum(u->ut_line[i]) ||
(u->ut_line[i]=='/')) {
tty[i+5] = u->ut_line[i];
}
else {
tty[i+5] = '\0';
}
}
int cur_idle=idletime(tty);
min_idle = (cur_idle < min_idle) ? cur_idle : min_idle;
}
}
/* The shortest idle time is the real idle time */
total_unused = (min_idle < total_unused) ? min_idle : total_unused;
if (debug && total_unused == min_idle)
printf("sleepd: activity: utmp %d seconds\n", min_idle);
return total_unused;
}
void main_loop (void) {
int activity=0, sleep_now=0, total_unused=0;
int sleep_battery=0;
int prev_ac_line_status=0;
time_t nowtime, oldtime=0;
apm_info ai;
double loadavg[1];
if (use_events) {
pthread_t emthread;
pthread_create(&emthread, NULL, eventMonitor, NULL);
}
while (1) {
activity=0;
if (use_events) {
pthread_mutex_lock(&condition_mutex);
pthread_cond_signal(&condition_cond);
pthread_mutex_unlock(&condition_mutex);
}
if (use_acpi) {
acpi_read(1, &ai);
}
#ifdef HAL
else if (use_simplehal) {
simplehal_read(1, &ai);
}
#endif
else {
apm_read(&ai);
}
if (min_batt != -1 && ai.ac_line_status != 1 &&
ai.battery_percentage < min_batt &&
ai.battery_status != BATTERY_STATUS_ABSENT) {
sleep_battery = 1;
}
if (sleep_battery && ! require_unused_and_battery) {
syslog(LOG_NOTICE, "battery level %d%% is below %d%%; forcing hibernation", ai.battery_percentage, min_batt);
if (system(hibernate_command) != 0)
syslog(LOG_ERR, "%s failed", hibernate_command);
/* This counts as activity; to prevent double sleeps. */
if (debug)
printf("sleepd: activity: just woke up\n");
activity=1;
oldtime=0;
sleep_battery=0;
}
/* Rest is only needed if sleeping on inactivity. */
if (! max_unused && ! ac_max_unused) {
sleep(sleep_time);
continue;
}
if (autoprobe || have_irqs) {
activity=check_irqs(activity, autoprobe);
}
if (use_net) {
activity=check_net(activity);
}
if ((max_loadavg != 0) &&
(getloadavg(loadavg, 1) == 1) &&
(loadavg[0] >= max_loadavg)) {
/* If the load average is too high */
if (debug)
printf("sleepd: activity: load average %f\n", loadavg[0]);
activity=1;
}
if (use_utmp == 1) {
total_unused=check_utmp(total_unused);
}
if (ai.ac_line_status != prev_ac_line_status) {
/* AC plug/unplug counts as activity. */
if (debug)
printf("sleepd: activity: AC status change\n");
activity=1;
}
prev_ac_line_status=ai.ac_line_status;
sleep(sleep_time);
if (use_events) {
pthread_mutex_lock(&activity_mutex);
if (eventData.emactivity == 1) {
if (debug)
printf("sleepd: activity: keyboard/mouse events\n");
activity=1;
}
pthread_mutex_unlock(&activity_mutex);
}
if (activity) {
total_unused = 0;
}
else {
total_unused += sleep_time;
if (ai.ac_line_status == 1) {
/* On wall power. */
if (ac_max_unused > 0) {
sleep_now = total_unused >= ac_max_unused;
}
}
else if (max_unused > 0) {
sleep_now = total_unused >= max_unused;
}
if (sleep_now && ! no_sleep && ! require_unused_and_battery) {
syslog(LOG_NOTICE, "system inactive for %ds; forcing sleep", total_unused);
if (system(sleep_command) != 0)
syslog(LOG_ERR, "%s failed", sleep_command);
total_unused=0;
oldtime=0;
sleep_now=0;
}
else if (sleep_now && ! no_sleep && sleep_battery) {
syslog(LOG_NOTICE, "system inactive for %ds and battery level %d%% is below %d%%; forcing hibernaton",
total_unused, ai.battery_percentage, min_batt);
if (system(hibernate_command) != 0)
syslog(LOG_ERR, "%s failed", hibernate_command);
total_unused=0;
oldtime=0;
sleep_now=0;
sleep_battery=0;
}
}
/*
* Keep track of how long it's been since we were last
* here. If it was much longer than sleep_time, the system
* was probably suspended, or this program was, (or the
* kernel is thrashing :-), so clear idle counter.
*/
nowtime=time(NULL);
/* The 1 is a necessary fudge factor. */
if (oldtime && nowtime - sleep_time > oldtime + 1) {
no_sleep=0; /* reset, since they must have put it to sleep */
writecontrol(no_sleep);
syslog(LOG_NOTICE,
"%i sec sleep; resetting timer",
(int)(nowtime - oldtime));
total_unused=0;
}
oldtime=nowtime;
}
}
void cleanup (int signum) {
if (daemonize)
unlink(PID_FILE);
exit(0);
}
int main (int argc, char **argv) {
FILE *f;
parse_command_line(argc, argv);
/* Log to the console if not daemonizing. */
openlog("sleepd", LOG_PID | (daemonize ? 0 : LOG_PERROR), LOG_DAEMON);
/* Set up a signal handler for SIGTERM to clean up things. */
signal(SIGTERM, cleanup);
/* And a handler for SIGHUP, to reaload control file. */
signal(SIGHUP, loadcontrol);
loadcontrol(0);
if (! use_events) {
if (! have_irqs && ! autoprobe) {
fprintf(stderr, "No irqs specified.\n");
exit(1);
}
}
if (daemonize) {
if (daemon(0,0) == -1) {
perror("daemon");
exit(1);
}
if ((f=fopen(PID_FILE, "w")) == NULL) {
syslog(LOG_ERR, "unable to write %s", PID_FILE);
exit(1);
}
else {
fprintf(f, "%i\n", getpid());
fclose(f);
}
}
if (apm_exists() != 0) {
if (! sleep_command)
sleep_command=acpi_sleep_command;
/* Chosing between hal and acpi backends is tricky,
* because acpi may report no batteries due to the battery
* being absent (but inserted later), or due to battery
* info no longer being available by acpi in new kernels.
* Meanwhile, hal may fail if hald is not yet
* running, but might work later.
*
* The strategy used is to check if acpi reports an AC
* adapter, or a battery. If it reports neither, we assume
* that the kernel no longer supports acpi power info, and
* use hal.
*/
if (acpi_supported() &&
(acpi_ac_count > 0 || acpi_batt_count > 0)) {
use_acpi=1;
}
#ifdef HAL
else if (simplehal_supported()) {
use_simplehal=1;
}
else {
syslog(LOG_NOTICE, "failed to connect to hal on startup, but will try to use it anyway");
use_simplehal=1;
}
#else
else {
fprintf(stderr, "sleepd: no APM or ACPI support detected\n");
exit(1);
}
#endif
}
if (! sleep_command) {
sleep_command=apm_sleep_command;
}
if (! hibernate_command) {
hibernate_command=sleep_command;
}
main_loop();
return(0); // never reached
}