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-rw-r--r--core/opiealarm/opiealarm.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/core/opiealarm/opiealarm.c b/core/opiealarm/opiealarm.c
index ce0103e..d96ffaf 100644
--- a/core/opiealarm/opiealarm.c
+++ b/core/opiealarm/opiealarm.c
@@ -40,12 +40,14 @@ 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;
+static pid_t startpid = 0;
+
void log_msg ( const char *msg )
{
if ( log ) {
fprintf ( log, msg );
fflush ( log );
@@ -55,25 +57,35 @@ void log_msg ( const char *msg )
void error_msg_and_die ( int perr, const char *msg )
{
if ( perr )
log_msg ( strerror ( errno ));
log_msg ( msg );
+ if ( getpid ( ) != startpid )
+ kill ( startpid, SIGUSR1 );
+
while ( 1 ) // pretend we are waiting on RTC, so opiealarm -r can kill us
sleep ( 1 );
}
void sig_handler ( int sig )
{
+ if ( log ) {
log_msg ( "GOT SIGNAL -> EXITING\n" );
fclose ( log );
+ }
remove_pidfile ( );
exit ( 0 );
}
+void sig_handler_parent ( int sig )
+{
+ 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" );
@@ -85,14 +97,18 @@ int fork_with_pidfile ( void )
{
FILE *fp;
pid_t pid;
pid = fork ( );
- if ( pid > 0 )
+ if ( pid > 0 ) {
+ signal ( SIGUSR1, sig_handler_parent );
+ while ( 1 )
+ sleep ( 1000 );
exit ( 0 );
+ }
else if ( pid < 0 ) {
perror ( "forking failed" );
return 0;
}
signal ( SIGTERM, sig_handler );
@@ -177,24 +193,26 @@ int main ( int argc, char **argv )
}
if ( !mode )
usage ( );
// kill running opiealarm
+ startpid = getpid ( );
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;
@@ -206,13 +224,12 @@ int suspend ( int fix_rtc )
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" );
@@ -220,14 +237,14 @@ int suspend ( int fix_rtc )
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;
+ alrt -= 5; // wake up 5 sec before the specified time
+
if ( log )
fprintf ( log, "Setting RTC alarm to %d\n", alrt );
tzset ( );
@@ -271,13 +288,15 @@ int suspend ( int fix_rtc )
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" );
+ if ( log )
+ fprintf( log, "SIGUSR: pid %d - SLEEPING: pid %d\n", startpid, getpid ( ));
+ kill ( startpid, SIGUSR1 );
// wait for alarm irq
if ( read ( fd, buf, sizeof( unsigned long )) < 0 )
error_msg_and_die ( 1, "read rtc alarm" );
log_msg ( "WAKEUP\n" );
@@ -323,12 +342,13 @@ int resume ( int resuspend )
if ( resuspend && onac ( )) {
time_t start, now;
char *argv [4];
if ( !fork_with_pidfile ( ))
return 4;
+ kill ( startpid, SIGUSR1 );
// sleep <resuspend> sec (not less!)
time ( &start );
do {
sleep ( 1 );
time ( &now );