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authorzecke <zecke>2003-06-13 10:41:14 (UTC)
committer zecke <zecke>2003-06-13 10:41:14 (UTC)
commit60ba51b33a060dde352caa678f2e337f5f5590f5 (patch) (side-by-side diff)
tree29da8884e438bb768f2d0a5f41dbaad62ce7776c
parent3dd3e5caf9ca85c814442b04485f07da060dc257 (diff)
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fix here as well
Diffstat (more/less context) (ignore whitespace changes)
-rw-r--r--core/opiealarm/opiealarm.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/core/opiealarm/opiealarm.c b/core/opiealarm/opiealarm.c
index 072dca7..465e633 100644
--- a/core/opiealarm/opiealarm.c
+++ b/core/opiealarm/opiealarm.c
@@ -1,381 +1,383 @@
/*
* opiealarm.c
*
* This program is for extracting the event time/date out
* of /etc/resumeat and setting the RTC alarm to that time/date.
* It is designed to run via a script just before the iPAQ
* is suspended and right after the iPAQ resumes operation.
*
* written and copyrighted by Robert Griebl <sandman@handhelds.org>
*/
#include <stdio.h>
#include <linux/rtc.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <stdlib.h>
#include <syslog.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#define PIDFILE "/var/run/opiealarm.pid"
#define TIMEFILE "/var/run/resumeat"
#define APMFILE "/proc/apm"
int resume ( int resuspend );
int suspend ( int fix_rtc );
int main ( int argc, char **argv );
int fork_with_pidfile ( void );
int kill_with_pidfile ( void );
void remove_pidfile ( void );
void usage ( void );
void sig_handler_child ( int sig );
void sig_handler_parent ( int sig );
int onac ( void );
static int opiealarm_was_running;
static pid_t parent_pid = 0;
void sig_handler_child ( int sig )
{
// child got SIGUSR2 -> cleanup pidfile and exit
remove_pidfile ( );
exit ( 0 );
}
void sig_handler_parent ( int sig )
{
// parent got SIGUSR1 -> safe to exit now
parent_pid = 0;
exit ( 0 );
}
void usage ( void )
{
fprintf ( stderr, "Usage: opiealarm -s [-f] | -r [-a]\n\n" );
fprintf ( stderr, "\t-s\tSuspend mode: set RTC alarm\n" );
fprintf ( stderr, "\t-f \tFix RTC, if RTC and system have more than 5sec difference (suspend mode)\n" );
fprintf ( stderr, "\t-r\tResume mode: kill running opiealarm\n" );
fprintf ( stderr, "\t-a <x>\tResuspend in <x> seconds (resume mode)\n\n" );
exit ( 1 );
}
int fork_with_pidfile ( void )
{
FILE *fp;
pid_t pid;
pid = fork ( );
if ( pid > 0 ) {
// We can not just exit now, because the kernel could suspend
// the iPAQ just before the child process sets the RTC.
// Solution: just wait for SIGUSR1 - the child process will
// signal this when it thinks it is safe to exit.
signal ( SIGUSR1, sig_handler_parent );
while ( 1 )
sleep ( 1000 );
exit ( 0 );
}
else if ( pid < 0 ) {
perror ( "forking failed" );
return 0;
- }
+ }
// child process needs to react to SIGUSR2. This is sent when
// a new opiealarm process is started.
signal ( SIGUSR2, sig_handler_child );
// save pid
if (( fp = fopen ( PIDFILE, "w" ))) {
fprintf ( fp, "%d", getpid ( ));
fclose ( fp );
// detach
close ( 0 );
close ( 1 );
close ( 2 );
setpgid ( 0, 0 );
return 1;
}
else {
perror ( PIDFILE );
return 0;
}
}
int kill_with_pidfile ( void )
{
FILE *fp;
pid_t pid;
int res = 0;
// terminate a running opiealarm child process
// return 1 if we really killed one
if (( fp = fopen ( PIDFILE, "r" ))) {
if ( fscanf ( fp, "%d", &pid ) == 1 )
res = ( kill ( pid, SIGUSR2 ) == 0 ) ? 1 : 0;
fclose ( fp );
}
return res;
}
void remove_pidfile ( void )
{
// child is about to exit - cleanup
unlink ( PIDFILE );
signal ( SIGUSR2, SIG_DFL );
}
int main ( int argc, char **argv )
{
int mode = 0;
int ac_resusp = 0;
int fix_rtc = 0;
int opt;
while (( opt = getopt ( argc, argv, "a:frs" )) != EOF ) {
switch ( opt ) {
case 's':
mode = 's';
break;
case 'r':
mode = 'r';
break;
case 'a':
ac_resusp = atoi ( optarg );
if ( ac_resusp < 30 ) {
ac_resusp = 120;
fprintf ( stderr, "Warning: resuspend timeout must be >= 30 sec. -- now set to 120 sec\n" );
}
break;
case 'f':
fix_rtc = 1;
break;
default:
usage ( );
}
}
if ( geteuid ( ) != 0 ) {
fprintf ( stderr, "You need root priviledges to run opiealarm." );
return 2;
}
if ( !mode )
usage ( );
parent_pid = getpid ( );
// kill running opiealarm
opiealarm_was_running = kill_with_pidfile ( );
remove_pidfile ( );
switch ( mode ) {
case 'r': opt = resume ( ac_resusp );
break;
case 's':
default : opt = suspend ( fix_rtc );
break;
}
parent_pid = 0;
return opt;
}
int suspend ( int fix_rtc )
{
FILE *fp;
char buf [64];
time_t alrt, syst, rtct;
struct tm alr, sys, rtc;
int fd;
int rtc_sys_diff;
if ( !fork_with_pidfile ( ))
return 3;
// we are the child process from here on ...
tzset ( ); // not sure if it is really needed -- it probably doesn't hurt ...
time ( &syst );// get the UNIX system time
sys = *localtime ( &syst );
do {
if (( fd = open ( "/dev/misc/rtc", O_RDWR )) < 0 )
if (( fd = open ( "/dev/rtc", O_RDWR )) < 0 )
break; // ( 1, "rtc" );
memset ( &rtc, 0, sizeof ( struct tm )); // get the RTC time
if ( ioctl ( fd, RTC_RD_TIME, &rtc ) < 0 )
break; // ( 1, "ioctl RTC_RD_TIME" );
rtct = mktime ( &rtc );
rtc_sys_diff = ( syst - rtct ) - sys. tm_gmtoff; // calculate the difference between system and hardware time
if ( fix_rtc && (( rtc_sys_diff < -3 ) || ( rtc_sys_diff > 3 ))) {
struct tm set;
set = *gmtime ( &syst );
// if the difference between system and hardware time is more than 3 seconds,
// we have to set the RTC (hwclock --systohc), or alarms won't work reliably.
if ( ioctl ( fd, RTC_SET_TIME, &set ) < 0 )
break; // ( 1, "ioctl RTC_SET_TIME" );
}
// read the wakeup time from TIMEFILE
if (!( fp = fopen ( TIMEFILE, "r" )))
break; // ( 1, TIMEFILE );
if ( !fgets ( buf, sizeof( buf ) - 1, fp ))
break; // ( 1, TIMEFILE );
fclose ( fp );
+ fp = 0;
alrt = atoi ( buf ); // get the alarm time
if ( alrt == 0 )
break; // ( 0, TIMEFILE " contains an invalid time description" );
alrt -= 5; // wake up 5 sec before the specified time
alr = *gmtime ( &alrt );
if ( ioctl ( fd, RTC_ALM_SET, &alr ) < 0 ) // set RTC alarm time
break; // ( 1, "ioctl RTC_ALM_SET" );
if ( ioctl ( fd, RTC_AIE_ON, 0 ) < 0 )
break; // ( 1, "ioctl RTC_AIE_ON" ); // enable RTC alarm irq
// tell the parent it is safe to exit now .. we have set the RTC alarm
kill ( parent_pid, SIGUSR1 );
if ( read ( fd, buf, sizeof( unsigned long )) < 0 ) // wait for the RTC alarm irq
break; // ( 1, "read rtc alarm" );
// iPAQ woke up via RTC irq -- otherwise we would have received a SIGUSR2
// from the "resume instance" of opiealarm.
if ( ioctl ( fd, RTC_AIE_OFF, 0 ) < 0 ) // disable RTC alarm irq
break; // ( 1, "ioctl RTC_AIE_OFF" );
close ( fd );
+ fd = -1;
remove_pidfile ( );
return 0;
} while ( 0 );
if ( fp != NULL )
fclose ( fp );
if ( fd != -1 )
close ( fd );
kill ( parent_pid, SIGUSR1 );
while ( 1 ) // pretend that we are waiting on RTC, so opiealarm -r can kill us
sleep ( 1000 ); // if we don't do this, the "resuspend on AC" would be triggerd
return 0;
}
int onac ( void )
{
FILE *fp;
int on = 0;
// check the apm proc interface for AC status
if (( fp = fopen ( APMFILE, "r" ))) {
int ac = 0;
if ( fscanf ( fp, "%*[^ ] %*d.%*d 0x%*x 0x%x 0x%*x 0x%*x %*d%% %*i %*c", &ac ) == 1 )
on = ( ac == 0x01 ) ? 1 : 0;
fclose ( fp );
}
return on;
}
int resume ( int resuspend )
{
FILE *fp;
// re-suspend when on AC (optional) when woken up via RTC
if ( !opiealarm_was_running ) {
// if opiealarm -s didn't wake up via RTC, the old process gets killed
// by kill_by_pidfile(), which is recorded in opiealarm_was_running
if ( resuspend && onac ( )) {
time_t start, now;
char *argv [4];
if ( !fork_with_pidfile ( ))
return 4;
// we can't wait for the resuspend timeout in the parent process.
// so we fork and tell the parent it can exit immediatly
kill ( parent_pid, SIGUSR1 );
// sleep <resuspend> seconds - this method is much more precise than sleep() !
time ( &start );
do {
sleep ( 1 );
time ( &now );
} while (( now - start ) < resuspend );
if ( onac ( )) { // still on ac ?
argv[0] = "qcop";
argv[1] = "QPE/Desktop";
argv[2] = "suspend()";
argv[3] = 0;
// hard coded for now ...but needed
// another way would be to simulate a power-button press
setenv ( "LOGNAME", "root", 1 );
setenv ( "HOME", "/root", 1 );
setenv ( "LD_LIBRARY_PATH", "/opt/QtPalmtop/lib", 1 );
setenv ( "QTDIR", "/opt/QtPalmtop", 1 );
remove_pidfile ( );
// no need for system() since this process is no longer usefull anyway
execv ( "/opt/QtPalmtop/bin/qcop", argv );
perror ( "exec for qcop failed" );
return 5;
}
}
}
return 0;
}