sockatmark

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Version: 2006-04-24 (openSuse - 09/10/07)

Section: 3 (Bibliothèques de fonctions)

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sockatmark - ¤É¤Î¥½¥±¥Ã¥È¤ËÂÓ°è³° (out-of-band) ¥Þ¡¼¥¯¤¬ÉÕ¤±¤é¤ì¤Æ¤¤¤ë¤«¤òÄ´¤Ù¤ë

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#include <sys/socket.h>

int sockatmark(int fd);

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fd ¤Ï sockatmark() ¤¬Å¬ÍѤǤ­¤Ê¤¤¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ç¤¢¤ë¡£

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sockatmark() ¤Ï glibc ¥Ð¡¼¥¸¥ç¥ó 2.2.4 ¤ÇÄɲ䵤줿¡£

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POSIX.1-2001

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sockatmark() ¤¬ 1 ¤òÊÖ¤¹¾ì¹ç¡¢ÂÓ°è³°¥Ç¡¼¥¿¤Ï MSG_OOB ¤ò»ØÄꤷ¤¿ recv(2) ¤ÇÆɤ߹þ¤à¤³¤È¤¬¤Ç¤­¤ë¡£

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sockatmark() ¤Ï SIGURG ¥·¥°¥Ê¥ë¤Î¥Ï¥ó¥É¥é¤«¤é°ÂÁ´¤Ë¸Æ¤Ó½Ð¤¹¤³¤È¤¬¤Ç¤­¤ë¡£

sockatmark() ¤Ï SIOCATMARK ioctl(2) Áàºî¤ò»È¤Ã¤Æ¼ÂÁõ¤µ¤ì¤Æ¤¤¤ë¡£

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glibc 2.4 ¤è¤êÁ°¤Î¥Ð¡¼¥¸¥ç¥ó¤Ç¤Ï¡¢ sockatmark() ¤ÏÆ°ºî¤·¤Ê¤¤¡£

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    char buf[BUF_LEN];

    char oobdata;

    int atmark, s;



    for (;;) {

        atmark = sockatmark(fd);

        if (atmark == -1) {

            perror("sockatmark");

            break;

        }



        if (atmark)

            break;



        s = read(fd, buf, BUF_LEN) <= 0);

        if (s == -1)

            perror("read");

        if (s <= 0)

            break;

    }



    if (atmark == 1) {

        if (recv(fd, &oobdata, 1, MSG_OOB) == -1) {

            perror("recv");

            ...

        }

    }

´ØÏ¢¹àÌÜ

fcntl(2), recv(2), send(2), tcp(7)