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sigvec

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sigvec, sigblock, sigsetmask, siggetmask, sigmask - BSD ÈÇ¥·¥°¥Ê¥ë API

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#define _BSD_SOURCE
#include <signal.h>

int sigvec(int sig, struct sigvec *vec, struct sigvec *ovec);

int sigmask(int signum);

int sigblock(int mask);

int sigsetmask(int mask);

int siggetmask(void);

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SIGKILL ¤È SIGSTOP ¤ÎÆ°ºî¤ÏÊѹ¹¤Ç¤­¤Ê¤¤¡£

sigvec ¹½Â¤ÂΤϰʲ¼¤ÎÄ̤ê¤Ç¤¢¤ë:

struct sigvec {

    void (*sv_handler)();  /* Signal disposition */

    int    sv_mask;        /* Signals to be blocked in handler */

    int    sv_flags;       /* Flags */

};

sv_handler ¥Õ¥£¡¼¥ë¥É¤Ï¥·¥°¥Ê¥ë¤ÎÆ°ºî¤ò»ØÄꤹ¤ë¤â¤Î¤Ç¡¢ ¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é´Ø¿ô¤Î¥¢¥É¥ì¥¹¤«¡¢ SIG_DFL ¤È SIG_IGN ¤Î¤¤¤º¤ì¤«¤ò»ØÄê¤Ç¤­¤ë¡£ SIG_DFL ¤Ï¥·¥°¥Ê¥ë¤ËŬÍѤµ¤ì¤ë¥Ç¥Õ¥©¥ë¥È¤ÎÆ°ºî¤ò°ÕÌ£¤·¡¢ SIG_IGN ¤Ï¥·¥°¥Ê¥ë¤ò̵»ë¤¹¤ë¤³¤È¤ò°ÕÌ£¤¹¤ë¡£

sv_handler ¤Ë¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤Î¥¢¥É¥ì¥¹¤ò»ØÄꤷ¤¿¾ì¹ç¡¢ sv_mask ¤Ï¥Ï¥ó¥É¥é¤¬¼Â¹ÔÃæ¤Ë¥Ö¥í¥Ã¥¯¤µ¤ì¤ë¤Ù¤­¥·¥°¥Ê¥ë¤Î¥Þ¥¹¥¯¤ò»ØÄꤹ¤ë¡£ ¤Þ¤¿¡¢¥Ï¥ó¥É¥é¤òµ¯Æ°¤·¤¿¥·¥°¥Ê¥ë¼«¿È¤Ï¥Ç¥Õ¥©¥ë¥È¤Ç¥Ö¥í¥Ã¥¯¤µ¤ì¤ë¡£ SIGKILL ¤« SIGSTOP ¤ò¥Ö¥í¥Ã¥¯¤·¤è¤¦¤È¤·¤¿¾ì¹ç¤Ë¤Ï¡¢ÌۤäÆ̵»ë¤µ¤ì¤ë¡£

sv_handler ¤Ë¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤Î¥¢¥É¥ì¥¹¤ò»ØÄꤷ¤¿¾ì¹ç¡¢ sv_flags ¥Õ¥£¡¼¥ë¥É¤Ï¥Ï¥ó¥É¥é¤¬¸Æ¤Ð¤ì¤¿ºÝ¤ÎµóÆ°¤òÀ©¸æ¤¹¤ë¥Õ¥é¥°¤ò»ØÄꤹ¤ë¡£ ¤³¤Î¥Õ¥£¡¼¥ë¥É¤Ë¤Ï¡¢0 ¤«¡¢°Ê²¼¤Î¥Õ¥é¥°¤ò 1¸Ä°Ê¾å»ØÄê¤Ç¤­¤ë:

SV_INTERRUPT

¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤¬Ää»ßÃæ¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤òÃæÃǤ·¤¿¾ì¹ç¡¢ ¥Ï¥ó¥É¥é¤«¤éÉüµ¢¤·¤Æ¤â¡¢¥·¥¹¥Æ¥à¥³¡¼¥ë¤ÏºÆ³«¤µ¤ì¤º¡¢ ¥¨¥é¡¼ EINTR ¤Ç¼ºÇÔ¤¹¤ë¡£ ¤³¤Î¥Õ¥é¥°¤ò»ØÄꤷ¤Ê¤«¤Ã¤¿¾ì¹ç¡¢¥·¥¹¥Æ¥à¥³¡¼¥ë¤Ï ¥Ç¥Õ¥©¥ë¥È¤ÇºÆ³«¤µ¤ì¤ë¡£

SV_RESETHAND

¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤ò¸Æ¤Ó½Ð¤¹Á°¤Ë¥·¥°¥Ê¥ë¤ÎÆ°ºî¤ò ¥Ç¥Õ¥©¥ë¥È¤Ë¥ê¥»¥Ã¥È¤¹¤ë¡£ ¤³¤Î¥Õ¥é¥°¤ò»ØÄꤷ¤Ê¤«¤Ã¤¿¾ì¹ç¡¢¤â¤¦°ìÅÙ sigvec() ¤ò¸Æ¤Ó½Ð¤·¤ÆÌÀ¼¨Åª¤Ëºï½ü¤µ¤ì¤ë¤«¡¢¥×¥í¥»¥¹¤¬ execve(2) ¤ò¼Â¹Ô¤¹¤ë¤Þ¤Ç¡¢¥Ï¥ó¥É¥é¤ÏÀßÄꤵ¤ì¤¿¤Þ¤Þ¤È¤Ê¤ë¡£

SV_ONSTACK

ÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¾å¤Ç¥·¥°¥Ê¥ë¥Ï¥ó¥É¥é¤ò¼Â¹Ô¤¹¤ë (Îò»ËŪ¤Ë¡¢BSD ¤Ç¤ÏÂåÂØ¥·¥°¥Ê¥ë¥¹¥¿¥Ã¥¯¤ÏÇѻߤµ¤ì¤¿´Ø¿ô sigstack() ¤ò»È¤Ã¤ÆÀßÄꤹ¤ë¡£POSIX ¤Ç¤Ï¡¢Âå¤ï¤ê¤Ë sigaltstack(2) ¤ò»ÈÍѤ¹¤ë)¡£

´Ø¿ô sigmask() ¤Ï signum ¤ËÂФ¹¤ë¡Ö¥·¥°¥Ê¥ë¥Þ¥¹¥¯¡×¤ò¹½À®¤·¤ÆÊÖ¤¹¡£ Î㤨¤Ð¡¢°Ê²¼¤Î¤è¤¦¤Ê¥³¡¼¥É¤ò»È¤¦¤È¡¢ sigvec() ¤ËÅϤ¹ vec.sv_mask ¤ò½é´ü²½¤Ç¤­¤ë¡£

    vec.sv_mask = sigmask(SIGQUIT) | sigpause(SIGABRT);

                /* Block SIGQUIT and SIGABRT during

                   handler execution */

sigblock() ´Ø¿ô¤Ï¡¢ mask ¤Ë¤¢¤ë¥·¥°¥Ê¥ë¤ò¥×¥í¥»¥¹¤Î¥·¥°¥Ê¥ë¥Þ¥¹¥¯¤ËÄɲä· (POSIX ¤Î sigprocmask(SIG_BLOCK) ¤ÈƱÍÍ)¡¢Êѹ¹Á°¤Î¥×¥í¥»¥¹¤Î¥·¥°¥Ê¥ë¥Þ¥¹¥¯¤òÊÖ¤¹¡£ SIGKILL ¤ä SIGSTOP ¤ò¥Ö¥í¥Ã¥¯¤·¤è¤¦¤È¤·¤¿¾ì¹ç¤Ë¤Ï¡¢ÌۤäÆ̵»ë¤µ¤ì¤ë¡£

sigsetmask() ´Ø¿ô¤Ï¥×¥í¥»¥¹¤Î¥·¥°¥Ê¥ë¥Þ¥¹¥¯¤ò mask ¤Ç»ØÄꤵ¤ì¤¿ÃͤËÀßÄꤷ (POSIX ¤Î sigprocmask(SIG_SETMASK) ¤ÈƱÍÍ)¡¢Êѹ¹Á°¤Î¥×¥í¥»¥¹¤Î¥·¥°¥Ê¥ë¥Þ¥¹¥¯¤òÊÖ¤¹¡£

siggetmask() ´Ø¿ô¤Ï¥×¥í¥»¥¹¤Î¸½ºß¤Î¥·¥°¥Ê¥ë¥Þ¥¹¥¯¤òÊÖ¤¹¡£¤³¤Î´Ø¿ô¤Ï sigblock(0) ¤ÈÅù²Á¤Ç¤¢¤ë¡£

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sigvec() ´Ø¿ô¤ÏÀ®¸ù¤¹¤ë¤È 0 ¤òÊÖ¤¹¡£¥¨¥é¡¼¤Î¾ì¹ç¡¢-1 ¤òÊÖ¤·¡¢ errno ¤Ë¥¨¥é¡¼¤ò¼¨¤¹Ãͤò¥»¥Ã¥È¤¹¤ë¡£

sigblock() ¤È sigsetmask() ¤ÏÊѹ¹Á°¤Î¥·¥°¥Ê¥ë¥Þ¥¹¥¯¤òÊÖ¤¹¡£

sigmask() ´Ø¿ô¤Ï signum ¤Î¥·¥°¥Ê¥ë¥Þ¥¹¥¯¤òÊÖ¤¹¡£

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sigaction(2) ¤È sigprocmask(2) ¤Î¡Ö¥¨¥é¡¼¡×¤ÎÀá¤ò»²¾È¡£

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¤³¤ì¤é¤Î´Ø¿ô¤Î¤¦¤Á siggetmask() °Ê³°¤ÎÁ´¤Æ¤Ï 4.3BSD ¤Ë¤¢¤Ã¤¿¡£ siggetmask() ¤Î½Ð¼«¤Ï¤Ï¤Ã¤­¤ê¤·¤Ê¤¤¡£ ¤³¤ì¤é¤Î´Ø¿ô¤ÏÇÑ»ßͽÄê¤Ç¤¢¤ê¡¢¿·¤·¤¤¥×¥í¥°¥é¥à¤Ç¤Ï»ÈÍѤ·¤Ê¤¤¤³¤È¡£

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4.3BSD ¤Ç¤Ï¡¢¿®ÍêÀ­¤Î¤¢¤ë¥·¥°¥Ê¥ë½èÍýµ¡¹½¤òÄ󶡤¹¤ë (vec.sv_mask ¤ò 0 ¤Ç sigvec() ¤ò¸Æ¤Ó½Ð¤·¤¿¤È¤­¤ÈƱÍÍ)¡£ System V ¤¬Ä󶡤¹¤ë½èÍýµ¡¹½¤Ï¿®ÍêÀ­¤Î¤Ê¤¤¤â¤Î¤Ç¤¢¤ë¡£ POSIX.1-2001 ¤Ç¤Ï¡¢ signal() ¤Î¤³¤ÎÅÀ¤Ïµ¬Äꤷ¤Ê¤¤¤Þ¤Þ¤È¤Ê¤Ã¤Æ¤¤¤ë¡£ ¤µ¤é¤Ê¤ë¾ÜºÙ¤Ë¤Ä¤¤¤Æ¤Ï signal(2) ¤ò»²¾È¡£

BSD ¤È System V ¤Î¤É¤Á¤é¤Î¥·¥¹¥Æ¥à¤Ç¤â ¥·¥°¥Ê¥ë¤òÂԤĤ¿¤á¤Ë¡¢ sigpause() ¤È¤¤¤¦Ì¾Á°¤Î´Ø¿ô¤¬Ä󶡤µ¤ì¤Æ¤¤¤ë¤¬¡¢ ¤³¤Î´Ø¿ô¤Î°ú¤­¿ô¤ÏξÊý¤Î¥·¥¹¥Æ¥à¤Ç°Û¤Ê¤ë¡£ ¾ÜºÙ¤Ï sigpause(3) ¤ò»²¾È¡£

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kill(2), pause(2), sigaction(2), signal(2), sigprocmask(2), raise(3), sigpause(3), sigset(3), feature_test_macros(7), signal(7)