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-rw-r--r--core/opiealarm/opiealarm.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/core/opiealarm/opiealarm.c b/core/opiealarm/opiealarm.c
index a4d46ed..71367b3 100644
--- a/core/opiealarm/opiealarm.c
+++ b/core/opiealarm/opiealarm.c
@@ -1,350 +1,360 @@
/* 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.
*
* Roughly based on ipaqalarm from Benjamin Long
*
* written 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 APMFILE "/proc/apm"
FILE *log; // debug only
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 ( int sig );
void error_msg_and_die ( int perr, const char *msg );
int onac ( void );
static int opiealarm_was_running;
void log_msg ( const char *msg )
{
if ( log ) {
fprintf ( log, msg );
fflush ( log );
}
}
void error_msg_and_die ( int perr, const char *msg )
{
if ( perr )
log_msg ( strerror ( errno ));
log_msg ( msg );
while ( 1 ) // pretend we are waiting on RTC, so opiealarm -r can kill us
sleep ( 1 );
}
void sig_handler ( int sig )
{
log_msg ( "GOT SIGNAL -> EXITING\n" );
fclose ( log );
remove_pidfile ( );
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 )
exit ( 0 );
else if ( pid < 0 ) {
perror ( "forking failed" );
return 0;
}
signal ( SIGTERM, sig_handler );
signal ( SIGINT, sig_handler );
// 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;
if (( fp = fopen ( PIDFILE, "r" ))) {
if ( fscanf ( fp, "%d", &pid ) == 1 )
return ( kill ( pid, SIGTERM ) == 0 ) ? 1 : 0;
fclose ( fp );
}
return 0;
}
void remove_pidfile ( void )
{
unlink ( PIDFILE );
signal ( SIGTERM, SIG_DFL );
signal ( SIGINT, 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 ( );
// kill running opiealarm
opiealarm_was_running = kill_with_pidfile ( );
remove_pidfile ( );
switch ( mode ) {
case 'r': return resume ( ac_resusp );
case 's':
default : return suspend ( fix_rtc );
}
return 0;
}
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;
log = fopen ( "/tmp/opiealarm.log", "w" );
log_msg ( "STARTING\n" );
if (!( fp = fopen ( "/etc/resumeat", "r" )))
error_msg_and_die ( 1, "/etc/resumeat" );
if ( !fgets ( buf, sizeof( buf ) - 1, fp ))
error_msg_and_die ( 1, "/etc/resumeat" );
fclose ( fp );
alrt = atoi ( buf );
if ( alrt == 0 )
error_msg_and_die ( 0, "/etc/resumeat contains an invalid time description" );
/* subtract 5 sec from event time... */
alrt -= 5;
if ( log )
fprintf ( log, "Setting RTC alarm to %d\n", alrt );
+
+ tzset ( );
alr = *gmtime ( &alrt );
// get system time
time ( &syst );
sys = *localtime ( &syst );
// Write alarm time to RTC
if (( fd = open ( "/dev/misc/rtc", O_RDWR )) < 0 )
error_msg_and_die ( 1, "/dev/misc/rtc" );
// get RTC time
+ memset ( &rtc, 0, sizeof ( struct tm ));
if ( ioctl ( fd, RTC_ALM_SET, &rtc ) < 0 )
error_msg_and_die ( 1, "ioctl RTC_RD_TIME" );
rtct = mktime ( &rtc );
+ fprintf ( log, "System time: %02d.%02d.%04d %02d:%02d:%02d DST: %d (TZ: %s, offset: %d)\n", sys. tm_mday, sys. tm_mon + 1, sys. tm_year + 1900, sys. tm_hour, sys. tm_min, sys. tm_sec, sys. tm_isdst, sys. tm_zone, sys. tm_gmtoff );
+ fprintf ( log, "RTC time: %02d.%02d.%04d %02d:%02d:%02d DST: %d (TZ: %s, offset: %d)\n", rtc. tm_mday, rtc. tm_mon + 1, rtc. tm_year + 1900, rtc. tm_hour, rtc. tm_min, rtc. tm_sec, rtc. tm_isdst, rtc. tm_zone, rtc. tm_gmtoff );
+ fprintf ( log, "Wakeup time: %02d.%02d.%04d %02d:%02d:%02d DST: %d (TZ: %s, offset: %d)\n", alr. tm_mday, alr. tm_mon + 1, alr. tm_year + 1900, alr. tm_hour, alr. tm_min, alr. tm_sec, alr. tm_isdst, alr. tm_zone, alr. tm_gmtoff );
+
+ fprintf ( log, "System/RTC diff: %d seconds\n", ( syst - rtct ) - sys. tm_gmtoff );
+
+
rtc_sys_diff = ( syst - rtct ) - sys. tm_gmtoff;
if ( fix_rtc && (( rtc_sys_diff < -4 ) || ( rtc_sys_diff > 4 ))) {
struct tm set;
set = *gmtime ( &syst );
fprintf ( log, "Correcting RTC: %d seconds\n", rtc_sys_diff );
if ( ioctl ( fd, RTC_SET_TIME, &set ) < 0 )
error_msg_and_die ( 1, "ioctl RTC_SET_TIME" );
}
// set alarm time
if ( ioctl ( fd, RTC_ALM_SET, &alr ) < 0 )
error_msg_and_die ( 1, "ioctl RTC_ALM_SET" );
// enable alarm irq
if ( ioctl ( fd, RTC_AIE_ON, 0 ) < 0 )
error_msg_and_die ( 1, "ioctl RTC_AIE_ON" );
log_msg ( "SLEEPING\n" );
// wait for alarm irq
if ( read ( fd, buf, sizeof( unsigned long )) < 0 )
error_msg_and_die ( 1, "read rtc alarm" );
log_msg ( "WAKEUP\n" );
// disable alarm irq
if ( ioctl ( fd, RTC_AIE_OFF, 0 ) < 0 )
error_msg_and_die ( 1, "ioctl RTC_AIE_OFF" );
close ( fd );
log_msg ( "EXITING\n" );
fclose ( log );
remove_pidfile ( );
return 0;
}
int onac ( void )
{
FILE *fp;
int on = 0;
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 ) { // opiealarm -s got it's RTC signal -> wake up by RTC
if ( resuspend && onac ( )) {
time_t start, now;
char *argv [4];
if ( !fork_with_pidfile ( ))
return 4;
// sleep <resuspend> sec (not less!)
time ( &start );
do {
sleep ( 1 );
time ( &now );
} while (( now - start ) < resuspend );
if ( onac ( )) { // still on ac
// system() without fork
argv[0] = "qcop";
argv[1] = "QPE/Desktop";
argv[2] = "suspend()";
argv[3] = 0;
// hard coded for now ...but needed
setenv ( "LOGNAME", "root", 1 );
setenv ( "HOME", "/root", 1 );
setenv ( "LD_LIBRARY_PATH", "/opt/QtPalmtop/lib", 1 );
setenv ( "QTDIR", "/opt/QtPalmtop", 1 );
remove_pidfile ( );
execv ( "/opt/QtPalmtop/bin/qcop", argv );
perror ( "exec for qcop failed" );
return 5;
}
}
}
return 0;
}