1 files changed, 27 insertions, 7 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 )
 {
-        log_msg ( "GOT SIGNAL -> EXITING\n" );
-        fclose ( log );
+        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 );