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sigfillset(sigset_t *set); ÉèÖÃËùÓеÄÐźŵ½setÐźż¯ÖУ»
sigemptyset(sigset_t *set); ´ÓsetÐźż¯ÖÐÇå¿ÕËùÓÐÐźţ»
sigaddset(sigset_t *set,int sig);ÔÚsetÐźż¯ÖмÓÈësigÐźţ»
sigdelset(sigset_t *set,int sig);ÔÚsetÐźż¯ÖÐɾ³ýsigÐźţ»
2. ÐźŴ¦Àíº¯Êý
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struct sigaction ³ÉÔ±:
sa_hanlder ºÍ sa_sigaction Ö¸ÏòÐźŴ¦Àíº¯ÊýµÄÖ¸Õ룬ֻÄܶ¨ÒåÆäÖÐÒ»¸ö£¬Á½¸ö¶¼¶¨ÒåµÄ»°£¬½«Ö´ÐÐsa_handlerÖ¸ÏòµÄº¯Êý;ÆäÖпÉÒÔÖ¸Ïòºê¶¨Òå SIG_IGN£¨ºöÂÔÐźţ© ºÍ SIG_DFL£¨ÐźÅĬÈÏÐÐΪ£©£»
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