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http://www.openchess.org/noitatsko/programming/ (2001-05-24 16:47:48)
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POSIX IPC 
reliable/unreliable 
reentrant 
pending 
sending signals 
catching signals 
manipulating 
signal definitions 
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Ò»°ã¼òµ¥µÄsignalд·¨ÈçÏÂ: 
void mysignal(int signo) 

  /* my signal handler */ 

void initsignal(void) 

  struct sigaction act; 
  act.sa_handler = mysignal; 
  act.sa_flags   = 0; 
  sigemptyset(&act.sa_mask); 
  sigaction(SIGHUP,&act,NULL); 
  sigaction(SIGINT,&act,NULL); 
  sigaction(SIGQUIT,&act,NULL); 
  sigaction(SIGILL,&act,NULL); 
  sigaction(SIGTERM,&act,NULL); 

  
ÀýÒ»: lock.c
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#include
#include
#include
#include
#define LOCK_FILE "/var/run/lock.pid"
void quit(int signo)
{
printf("Receive signal %d\n",signo);
unlink(LOCK_FILE);
exit


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