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IOCTL
Section: Linux Programmer's Manual (2)Updated: 23 July 1993
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ioctl - ¥Ç¥Ð¥¤¥¹(device)¤òÀ©¸æ¤¹¤ë½ñ¼°
#include <sys/ioctl.h>int ioctl(int d, int request, ...)
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ioctl ´Ø¿ô¤Ï¥¹¥Ú¥·¥ã¥ë¡¦¥Õ¥¡¥¤¥ë¤ò¹½À®¤¹¤ë¥Ç¥Ð¥¤¥¹¤Î¥Ñ¥é¥á¡¼¥¿¡¼¤ò Áàºî¤¹¤ë¡£Æäˡ¢¥¥ã¥é¥¯¥¿¡¼¡¦¥¹¥Ú¥·¥ã¥ë¡¦¥Õ¥¡¥¤¥ë(Î㤨¤ÐüËö(terminal)) ¤ÎÁàºî²Äǽ¤ÊÆÃÀ¤ò ioctl ¥ê¥¯¥¨¥¹¥È¤Ë¤è¤Ã¤ÆÀ©¸æ¤¹¤ë¤³¤È¤¬¤Ç¤¤ë¡£°ú¤¿ô d ¤Ï¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼¤Ç¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£ioctl request ¤Ë¤Ï°ú¤¿ô¤¬ ÆþÎÏ ¥Ñ¥é¥á¡¼¥¿¡¼¤« ½ÐÎÏ ¥Ñ¥é¥á¡¼¥¿¡¼¤Î¤É¤Á¤é¤«¤È¡¢ argp ¤ÎÂ礤µ¤ò¥Ð¥¤¥È¿ô¤Ç¥¨¥ó¥³¡¼¥É¤¹¤ë¡£ ÆÃÄê¤Î ioctl request ¤ò»ÈÍѤ¹¤ë¤¿¤á¤Î¥Þ¥¯¥í(macro)¤ÈÄêµÁ¤Ï <sys/ioctl.h> ¥Õ¥¡¥¤¥ë¤Ë¤¢¤ë¡£
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¤¿¤¤¤Æ¤¤¤Î¾ì¹ç¡¢À®¸ù¤·¤¿¾ì¹ç¤Ï¥¼¥í¤¬ÊÖ¤µ¤ì¤ë¡£ ¤¤¤¯¤Ä¤«¤Î ioctl ¤Ç¤ÏÊÖ¤êÃͤò½ÐÎϥѥé¥á¡¼¥¿¤È¤·¤Æ»ÈÍѤ·¤Æ¤¤¤¿¤ê¡¢ À®¸ù¤·¤¿¾ì¹ç¤ËÉé¤ÎÃͤòÊÖ¤·¤¿¤ê¤¹¤ë¡£ ¥¨¥é¡¼¤Î¾ì¹ç¤Ï -1 ¤¬ÊÖ¤µ¤ì¡¢ errno ¤¬Å¬ÀÚ¤ËÀßÄꤵ¤ì¤ë¡£¥¨¥é¡¼
- EBADF
- d ¤¬Í¸ú¤Ê¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼¤Ç¤Ï¤Ê¤¤¡£
- EFAULT
- argp ¤¬¥¢¥¯¥»¥¹ÉÔ²Äǽ¤Ê¥á¥â¥ê¤ò»²¾È¤·¤Æ¤¤¤ë¡£
- ENOTTY
- d ¤¬¥¥ã¥é¥¯¥¿¡¼¡¦¥¹¥Ú¥·¥ã¥ë¡¦¥Ç¥Ð¥¤¥¹¤ò»²¾È¤·¤Æ¤¤¤Ê¤¤¡£
- ENOTTY
- »ØÄꤵ¤ì¤¿¥ê¥¯¥¨¥¹¥È¤Ï¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¼ d ¤¬»²¾È¤¹¤ë¼ïÎà¤Î¥ª¥Ö¥¸¥§¥¯¥È¤Ë¤ÏŬÍѤ¹¤ë¤³¤È¤¬¤Ç¤¤Ê¤¤¡£
- EINVAL
- request ¤Þ¤¿¤Ï argp ¤¬ÉÔÀµ¤Ç¤¢¤ë¡£
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¤É¤ì¤«°ì¤Ä¤Îɸ½à¤ËÂбþ¤·¤Æ¤¤¤ë¤ï¤±¤Ç¤Ï¤Ê¤¤¡£ ioctl(2) ¤Î°ú¤¿ô¡¢ÊÖ¤êÃÍ¡¢²ò¼á¤ÏÌäÂê¤Ë¤Ê¤Ã¤Æ¤¤¤ë¥Ç¥Ð¥¤¥¹¡¦¥É¥é¥¤¥Ð¡¼¤´¤È¤Ë °Û¤Ê¤Ã¤Æ¤¤¤ë(¤½¤Î¥³¡¼¥ë¤ÏÌÀ¤é¤«¤Ë Unix ¤Î ¥¹¥È¥ê¡¼¥à I/O ¥â¥Ç¥ë ¤Ë»÷¤ï¤Ê¤¤Áàºî¤Î¤¿¤á¤Ë»ÈÍѤµ¤ì¤Æ¤¤¤ë)¡£ ¤è¤¯ÃΤé¤ì¤Æ¤¤¤ë ioctl ¤Î¥ê¥¹¥È¤Ë¤Ä¤¤¤Æ¤Ï ioctl_list(2) ¤ò»²¾È¤¹¤ë¤³¤È¡£ ioctl ´Ø¿ô¥³¡¼¥ë¤Ï Version 7 AT&T Unix ¤Ç¸½¤ï¤ì¤¿¡£´ØÏ¢¹àÌÜ
execve(2), fcntl(2), mt(4), sd(4), tty(4)