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LP
Section: Special files (4)Updated: January 15, 1995
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lp - ¥é¥¤¥ó¥×¥ê¥ó¥¿¡¼¥Ç¥Ð¥¤¥¹½ñ¼°
#include <linux/lp.h>ÀßÄê
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¼¡¤Î ioctl(2) ¥³¡¼¥ë¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤ë¡£- int ioctl(int fd, LPTIME, int arg)
- ¥×¥ê¥ó¥¿¡¼¤Î¥Ð¥Ã¥Õ¥¡( buffer ) ¤¬¤¤¤Ã¤Ñ¤¤¤Ë¤Ê¤Ã¤¿»þ¡¢¥É¥é¥¤¥Ð¤¬¥×¥ê¥ó¥¿¡¼ ¤òºÆ¥Á¥§¥Ã¥¯¤¹¤ë¤Þ¤Ç¤ËµÙ»ß¤¹¤ë»þ´Ö¤ò arg ¤È¤¹¤ë¡£¹â®¤Ê¥×¥ê¥ó¥¿¡¼ ¤Î»þ¤Ï¤³¤ì¤ò¸º¤é¤·¡¢ÃÙ¤¤¥×¥ê¥ó¥¿¡¼¤Î»þ¤Ë¤ÏÁý¤ä¤¹¡£Ã±°Ì¤Ï1ÉäÎ100ʬ¤Î1 ¤Ç¡¢¥Ç¥Õ¥©¥ë¥È¤Î2¤Ï0.02Éäˤ¢¤¿¤ë¡£¥Ý¡¼¥ê¥ó¥°¥É¥é¥¤¥Ð( polling driver )¤Î¤ß¤Ë±Æ¶Á¤¹¤ë¡£
- int ioctl(int fd, LPCHAR, int arg)
- ¥Ý¡¼¥ê¥ó¥°¥É¥é¥¤¥Ð¤¬¥×¥ê¥ó¥¿¡¼¤Îʸ»ú¼õ¼è¤ê½àÈ÷¤¬¤Ç¤¤ë¤Î¤òÂÔ ¤Ä¥Ó¥¸¡¼¥¦¥¨¥¤¥È(busy-wait)¤Î²ó¿ô¤ÎºÇÂçÃͤò arg¤È¤¹¤ë¡£ ¤â¤·°õºþ¤¬ÃÙ¤¹¤®¤ë»þ¤Ï¤³¤ì¤òÁý¤ä¤·¡¢¥·¥¹¥Æ¥à¤¬ÃÙ¤¯¤Ê¤ê¤¹¤®¤ë»þ¤Ë¤Ï ¸º¤é¤¹¡£¥Ç¥Õ¥©¥ë¥È¤Ï 1000 ¤Ç¤¢¤ë¡£¥Ý¡¼¥ê¥ó¥°¥É¥é¥¤¥Ð¤Î¤ß¤Ë±Æ¶Á¤¹¤ë¡£
- int ioctl(int fd, LPABORT, int arg)
- ¤â¤·¡¢arg ¤¬ 0 ¤Ê¤é¡¢¥×¥ê¥ó¥¿¡¼¥É¥é¥¤¥Ð¤Ï¥¨¥é¡¼¤Ë¤Ä¤¤¤ÆºÆ»î¹Ô ¤ò¹Ô¤¦¡£¤½¤ì°Ê³°¤Î¾ì¹ç¤ÏÃæ»ß¤¹¤ë¡£¥Ç¥Õ¥©¥ë¥È¤Ï 0 ¤Ç¤¢¤ë¡£
- int ioctl(int fd, LPABORTOPEN, int arg)
- ¤â¤·¡¢arg ¤¬ 0 ¤Ê¤é open(2) ¤Î·ë²Ì¤¬¥¨¥é¡¼¤Î¾ì¹ç¡¢Æ°ºî¤¬Ãæ»ß¤µ¤ì¤ë¡£¤½¤ì°Ê³°¤Ê¤é¥¨¥é¡¼¤Ï̵ »ë¤µ¤ì¤ë¡£¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¥¨¥é¡¼¤Ï̵»ë¤µ¤ì¤ë¡£
- int ioctl(int fd, LPCAREFUL, int arg)
- arg¤¬0¤Î¤È¤¤Ë¤Ï¡¢¤¹¤Ù¤Æ¤Î½ñ¤½Ð¤·¤Î»þ¤Ë¡¢»æÀڤ졢¥ª¥Õ¥é¥¤¥ó¡¢¥¨ ¥é¡¼¤Î¥·¥°¥Ê¥ë¤¬µ¶(false)¤Ç¤¢¤ë¤³¤È¤¬É¬ÍפȤµ¤ì¤ë¤¬¡¢0 °Ê³°¤Ê¤é¤³¤ì ¤é¤Î¥·¥°¥Ê¥ë¤Ï̵»ë¤µ¤ì¤ë¡£¥Ç¥Õ¥©¥ë¥È¤Ç¤â¤³¤ì¤é¤Î¥·¥°¥Ê¥ë¤Ï̵»ë¤µ¤ì¤ë¡£
- int ioctl(int fd, LPWAIT, int arg)
- ¥×¥ê¥ó¥¿¡¼¤¬Á÷¤é¤ì¤¿Ê¸»ú¤ò¼õ¤±¼è¤ë¤Î¤òÂԤĤ¿¤á¡¢¥É¥é¥¤¥Ð¤¬Ê¸»ú¤òÁ÷¤Ã ¤Æ¤«¤é¥¹¥È¥í¡¼¥Ö(strobe)¤¹¤ë¤Þ¤Ç¤ÎÂÔ¤Á¤Î·«¤êÊÖ¤·¤Î²ó¿ô¤È¡¢¥¹¥È¥í¡¼¥Ö ¤òºÆ¤Ó¥ª¥Õ¤Ë¤¹¤ë¤Þ¤Ç¤ÎÂÔ¤Á¤Î·«¤êÊÖ¤·¤Î²ó¿ô¤ò arg¤ËÀßÄê ¤¹¤ë¡£»ÅÍͤˤè¤ì¤Ð¤³¤Î»þ´Ö¤Ï 0.5 ¥Þ¥¤¥¯¥íÉäȤ¹¤ë¤Ù¤¤À¤¬¡¢·Ð¸³¤Ë¤è¤ì¤Ð ¤³¤Î¥³¡¼¥É¤Ë¤è¤Ã¤ÆÀ¸¤¸¤ëÃÙ¤ì¤Ç½½Ê¬¤Ç¤¢¤ë¡£¤½¤Î¤¿¤á¡¢¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï 0 ¤Ç ¤¢¤ë¡£¤³¤ì¤Ï¡¢¥Ý¡¼¥ê¥ó¥°¤È³ä¤ê¹þ¤ß¥É¥é¥¤¥Ð¤ÎξÊý¤Ç»È¤ï¤ì¤ë¡£
- int ioctl(int fd, LPSETIRQ, int arg)
- ¤³¤Îioctl()¤ò»È¤¦¤Ë¤Ï¡¢¥¹¡¼¥Ñ¡¼¥æ¡¼¥¶¤Î¸¢¸Â¤¬É¬ÍפǤ¢¤ë¡£¿·¤·¤¤IRQ¤ò¤· ¤á¤¹À°¿ô¤ò°ú¿ô¤È¤·¤Æ¤È¤ë¡£¤Þ¤¿¡¢ÉûºîÍѤȤ·¤Æ¥×¥ê¥ó¥¿¡¼¤Ï¥ê¥»¥Ã¥È¤µ¤ì¤ë¡£ arg¤¬0¤Î»þ¤Þ¤¿¤Ï¥Ç¥Õ¥©¥ë¥È¤ÎÆ°ºî¤Ç¤Ï¡¢¥Ý¡¼¥ê¥ó¥°¥É¥é¥¤¥Ð¡¼¤¬»È¤ï ¤ì¤ë¡£
- int ioctl(int fd, LPGETIRQ, int *arg)
- ¸½ºß»È¤ï¤ì¤Æ¤¤¤ëIRQ¤òarg¤Ë¤¤¤ì¤ë¡£
- int ioctl(int fd, LPGETSTATUS, int *arg)
-
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LP_PBUSY ¥Ó¥¸¡¼¿®¹æ¤Îȿž¡¢¥Ï¥¤¤¬¥¢¥¯¥Æ¥£¥Ö LP_PACK ¥¢¥¯¥Î¥ê¥Ã¥¸¿®¹æ¡¢¥í¡¼¤¬¥¢¥¯¥Æ¥£¥Ö LP_POUTPA »æÀڤ쿮¹æ¡¢¥Ï¥¤¤¬¥¢¥¯¥Æ¥£¥Ö LP_PSELECD ÁªÂò¿®¹æ¡¢¥Ï¥¤¤¬¥¢¥¯¥Æ¥£¥Ö LP_PERRORP ¥¨¥é¡¼¿®¹æ¡¢¥í¡¼¤¬¥¢¥¯¥Æ¥£¥Ö ¿®¹æ¤Î°ÕÌ£¤Ë¤Ä¤¤¤Æ¤Ï³Æ¼«¤Î¥×¥ê¥ó¥¿¡¼¤Î¥Þ¥Ë¥å¥¢¥ë¤ò»²¾È¤Î¤³¤È¡£¥×¥ê¥ó¥¿¡¼ ¤Ë¤è¤Ã¤Æ¤ÏµºÜ¤Î¤Ê¤¤¥Ó¥Ã¥È¤â¥»¥Ã¥È¤µ¤ì¤ë¤«¤â¤·¤ì¤Ê¤¤¤Î¤Ç¡¢Ãí°Õ¤Î¤³¤È¡£
- int ioctl(int fd, LPRESET)
- ¥×¥ê¥ó¥¿¡¼¤ò¥ê¥»¥Ã¥È¤¹¤ë¡£°ú¿ô¤Ï¤È¤é¤Ê¤¤¡£
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/dev/lp*Ãø¼Ô
¥×¥ê¥ó¥¿¡¼¥É¥é¥¤¥Ð¤Ï½é¤á¤Ï Jim Weigand ¤È Linus Torvalds ¤Ë¤è¤Ã¤Æ½ñ ¤«¤ì¡¢¤µ¤é¤Ë Michael K. Johnson ¤Ë¤è¤Ã¤Æ²þÎɤµ¤ì¤¿¡£³ä¤ê¹þ¤ß¤Î¥³¡¼¥É ¤Ï Nigel Gamble ¤Ë¤è¤Ã¤Æ½ñ¤«¤ì¤¿¡£¤Þ¤¿¡¢Alan Cox ¤Ï¥É¥é¥¤¥Ð¤ò¥â¥¸¥å¡¼ ¥ë²½¤·¤¿¡£ LPCAREFUL, LPABORT, LPGETSTATUS ¤Ï Chris Metcalf ¤Ë¤è¤Ã¤Æ²Ã¤¨¤é¤ì¤¿¡£´ØÏ¢¹àÌÜ
mknod(1), chown(1), chmod(1), tunelp(8), lpcntl(8)ËÝÌõ¼Ô
ÀÐÀî ËÓ <ishikawa@linux.or.jp>¹â¶¶ ËÓ»Ê <muz@ilp.iijnet.or.jp>
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