Linux³ÌʽÉè¼Æ
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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ÐźÅsingals
ÐźŵĴ¦Àí¿ÉÒÔÓÃÒ»´óÕÂÀ´Ð´£¬Éæ¼°µÄ²ãÃæÒ²»áÉîÈëÕû¸ö×÷ҵϵͳÖУ¬ÎÒ²¢²»´òËãÕâÑù×ö£¬ÒòΪÄú¿ÉÄÜ»áÔ½¸ãÔ½ÃÔºý¡£ÕâÀïÎÒÖ»¸æËßÄúÈçºÎ½ÓÉÏÐźţ¬ÔÚʵÓõIJãÃæÉÏ£¬ÕâÑù±ãºÜ¹»ÓÃÁË¡£Äú¿ÉÒÔÏÈÀûÓÃÕâЩ»ù±¾µÄ¼¼ÇÉÀ´×«Ð´³Ìʽ£¬µÈµ½ÓнøÒ»²½¸ßµÈÓ¦ÓõÄÐèҪʱ£¬ÕÒÒ»±¾½ÏÉîÈëµÄUNIX Programming½Ì²Ä£¬×¨ÃÅÑо¿signalµÄд·¨¡£
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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