void init_daemon( void ) 
 { 
 	int	pid; 
 	int i; 
  
 	if( pid = fork() ) 
 		exit( 0 );	 
          else if( pid  < 0 ) 
 		exit( 1 ); 
  
          setsid();	 
  
 	if( pid = fork() ) 
 		exit( 0 ); 
 	else if( pid  < 0 ) 
 		exit( 1 ); 
  
 	for( i = 0; i  < NOFILE; i++ ) 
 		close( i ); 
 		 
 	chdir( "/tmp" ); 
 	umask( 0 ); 
 } 
  
 int main( void ) 
 { 
 	FILE *fp; 
 	time_t tt; 
  
 	init_daemon(); 
  
 	while( 1 ) { 
 		sleep( 5 ); 
 		if( fp = fopen("test.log", a) ) { 
 			tt = time( 0 ); 
 			fprintf( fp, "I'm here at %s\n", asctime(localtime(&tt)) ); 
 			fclose( fp ); 
 		} 
 	} 
 }