getdtablesize

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Version: 2002-04-15 (openSuse - 09/10/07)

Section: 2 (Appels système)

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#include <unistd.h>

int getdtablesize(void);

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getdtablesize() ¤Ï 1 ¤Ä¤Î¥×¥í¥»¥¹¤Î¥ª¡¼¥×¥ó¤Ç¤­¤ë¥Õ¥¡¥¤¥ë¿ô¤ÎºÇÂçÃͤòÊÖ¤¹¡£ ÊÖ¤êÃͤϥե¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Î¼è¤êÆÀ¤ëºÇÂçÃͤè¤ê 1 Â礭¤¤ÃͤǤ¢¤ë¡£

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Linux ¤Ç¤Ï¡¢ getdtablesize() ¤Ï getrlimit(2) ¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë¥¨¥é¡¼¤òÊÖ¤¹¤³¤È¤¬¤¢¤ë¡£ ²¼µ­¤Î¡ÖÃí°Õ¡×¤ò»²¾È¤Î¤³¤È¡£

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SVr4, 4.4BSD (getdtablesize() ´Ø¿ô¤Ï 4.2BSD ¤ÇºÇ½é¤Ë¸½¤ï¤ì¤¿)¡£ ¤³¤ì¤Ï POSIX.1-2001 ¤Çµ¬Äꤵ¤ì¤Æ¤¤¤Ê¤¤¤Î¤Ç¡¢ °Ü¿¢À­¤Î¤¢¤ë¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤Ï¤³¤Î¸Æ¤Ó½Ð¤·¤ÎÂå¤ï¤ê¤Ë sysconf(_SC_OPEN_MAX) ¤ò»È¤¦¤Ù¤­¤Ç¤¢¤ë¡£

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getdtablesize() ¤Ï libc ¤Î¥é¥¤¥Ö¥é¥ê´Ø¿ô¤È¤·¤Æ¼ÂÁõ¤µ¤ì¤Æ¤¤¤ë¡£glibc ÈÇ¤Ï getrlimit(2) ¤ò¸Æ¤Ó½Ð¤·¤Æ¡¢¸½ºß¤Î RLIMIT_NOFILE ¤òÊÖ¤¹¡£ ¸Æ¤Ó½Ð¤·¤Ë¼ºÇÔ¤·¤¿¾ì¹ç¤Ï OPEN_MAX ¤òÊÖ¤¹¡£ libc4 ¤È libc5 ¤Ç¤Ï OPEN_MAX (Linux 0.98.4 °Ê¹ß¤Ç¤Ï 256 ¤ËÀßÄꤵ¤ì¤Æ¤¤¤ë) ¤òÊÖ¤¹¡£

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close(2), dup(2), getrlimit(2), open(2)