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[linuxjm/jm.git] / manual / LDP_man-pages / release / man3 / aio_read.3

.\" Copyright (c) 2003 Andries Brouwer (aeb@cwi.nl)
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
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.\" You should have received a copy of the GNU General Public
.\" License along with this manual; if not, write to the Free
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.\" Japanese Version Copyright (c) 2004 Yuichi SATO
.\"         all rights reserved.
.\" Translated Mon Jul  5 00:46:45 JST 2004
.\"         by Yuichi SATO <ysato444@yahoo.co.jp>
.\"
.TH AIO_READ 3 2003-11-14  "" "Linux Programmer's Manual"
.SH ̾Á°
aio_read \- ÈóƱ´ü¤ÇÆɤ߹þ¤à
.SH ½ñ¼°
.B "#include <aio.h>"
.sp
.BI "int aio_read(struct aiocb *" aiocbp );
.sp
\fI\-lrt\fP ¤Ç¥ê¥ó¥¯¤¹¤ë¡£
.SH ÀâÌÀ
.BR aio_read ()
´Ø¿ô¤ÏÈóƱ´ü¤Î "n = read(fd, buf, count)" ¤ò¥ê¥¯¥¨¥¹¥È¤¹¤ë¡£
¤³¤³¤Ç fd, buf, count ¤Ï¡¢¤½¤ì¤¾¤ì
.IR aiocbp\->aio_fildes ,
.IR aiocbp\->aio_buf ,
.I aiocbp\->aio_nbytes
¤ÇÍ¿¤¨¤é¤ì¤ë¡£
ÊÖ¤êÃÍ (return status) n ¤Ï¡¢´°Î»»þ¤Ë
.BR aio_return (3)
¤ò»È¤Ã¤Æ¼èÆÀ¤Ç¤­¤ë¡£
.LP
¥Ç¡¼¥¿¤Ï¡¢¥«¥ì¥ó¥È¤Î¥Õ¥¡¥¤¥ë°ÌÃ֤˴ط¸¤Ê¤¯¡¢ÀäÂÐ¥Õ¥¡¥¤¥ë¥ª¥Õ¥»¥Ã¥È
.I aiocbp\->aio_offset
¤ò³«»ÏÅÀ¤È¤·¤ÆÆɤ߹þ¤Þ¤ì¤ë¡£
¤³¤Î¥ê¥¯¥¨¥¹¥È¸å¤Î¡¢¥«¥ì¥ó¥È¤Î¥Õ¥¡¥¤¥ë°ÌÃ֤ϵ¬Äꤵ¤ì¤Æ¤¤¤Ê¤¤¡£
.LP
¡ÖÈóƱ´ü¡×¤È¤Ï¡Ö¥ê¥¯¥¨¥¹¥È¤¬¥­¥å¡¼¤ËÆþ¤ì¤é¤ì¤¿¤é¡¢¤³¤Î¸Æ¤Ó½Ð¤·¤Ï¤¹¤°¤ËÊÖ¤ë¡×
¤È¤¤¤¦¤³¤È¤Ç¤¢¤ë¡£
¸Æ¤Ó½Ð¤·¤«¤éÌá¤Ã¤¿»þ¤Ë¡¢Æɤ߹þ¤ß¤Ï´°Î»¤·¤Æ¤¤¤ë¤«¤âÃΤì¤Ê¤¤¤·¡¢
´°Î»¤·¤Æ¤¤¤Ê¤¤¤«¤âÃΤì¤Ê¤¤¡£
.BR aio_error (3)
¤ò»È¤¦¤³¤È¤Ç´°Î»¤·¤¿¤«¤ò¥Æ¥¹¥È¤Ç¤­¤ë¡£
.LP
.B _POSIX_PRIORITIZED_IO
¤¬ÄêµÁ¤µ¤ì¤Æ¤¤¤Æ¡¢
¤«¤Ä¥Õ¥¡¥¤¥ë¤¬¤³¤ì¤ò¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤ë¾ì¹ç¡¢
ÈóƱ´üÁàºî¤Ï¸Æ¤Ó½Ð¤·¤¿¥×¥í¥»¥¹¤ÎÍ¥ÀèÅÙ¤«¤é
.I aiocbp\->aio_reqprio
¤ò°ú¤¤¤¿Í¥ÀèÅÙ¤ÇÅÐÏ¿ (submit) ¤µ¤ì¤ë¡£
.LP
¥Õ¥£¡¼¥ë¥É
.I aiocbp\->aio_lio_opcode
¤Ï̵»ë¤µ¤ì¤ë¡£
.LP
ºÇÂ祪¥Õ¥»¥Ã¥È¤òĶ¤¨¤¿Ä̾ï¤Î¥Õ¥¡¥¤¥ë¤«¤é¤Ï¡¢²¿¤â¥Ç¡¼¥¿¤¬Æɤ߹þ¤Þ¤ì¤Ê¤¤¡£
.SH ÊÖ¤êÃÍ
À®¸ù¤·¤¿¾ì¹ç¡¢0 ¤¬ÊÖ¤µ¤ì¤ë¡£
¥¨¥é¡¼¤Î¾ì¹ç¡¢¥ê¥¯¥¨¥¹¥È¤Ï¥­¥å¡¼¤ËÆþ¤ì¤é¤ì¤º¡¢
\-1 ¤¬ÊÖ¤µ¤ì¤Æ¡¢
.I errno
¤¬Å¬ÀÚ¤ËÀßÄꤵ¤ì¤ë¡£
¥¨¥é¡¼¤ÏºÇ½é¤Ë¸¡ÃΤµ¤ì¤¿¸å¤Ç¡¢
(¾õÂÖ \-1 ¤òÊÖ¤¹)
.BR aio_return (3)
¤È
.RI ( errno
¤Ç¼èÆÀ¤Ç¤­¤ë
.B EBADF
¤Î¤è¤¦¤Ê¥¨¥é¡¼¾õÂÖ¤òÊÖ¤¹)
.BR aio_error (3)
¤ÇÊó¹ð¤µ¤ì¤ë¤À¤í¤¦¡£
.SH ¥¨¥é¡¼
.TP
.B EAGAIN
¥ê¥½¡¼¥¹¤¬Â­¤ê¤Ê¤¤¡£
.TP
.B EBADF
.I aio_fildes
¤ÏÆɤ߹þ¤ß¤Î¤¿¤á¤Ë¥ª¡¼¥×¥ó¤µ¤ì¤¿Í­¸ú¤Ê¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ç¤Ê¤¤¡£
.TP
.B EINVAL
.IR aio_offset ,
.IR aio_reqprio ,
.I aio_nbytes
¤Î¤¦¤Á 1 ¤Ä°Ê¾å¤¬Ìµ¸ú¤Ç¤¢¤ë¡£
.TP
.B ENOSYS
¤³¤Î´Ø¿ô¤¬¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤Ê¤¤¡£
.TP
.B EOVERFLOW
¥Õ¥¡¥¤¥ë¤¬Ä̾ï¤Î¥Õ¥¡¥¤¥ë¤Ç¤¢¤ê¡¢
¥Õ¥¡¥¤¥ë¤Î½ªÃ¼¤ÎÁ°¤«¤éÆɤ߹þ¤ß¤ò³«»Ï¤·¤Æ¡¢
¾¯¤Ê¤¯¤È¤â 1 ¥Ð¥¤¥È¤òÆɤ߹þ¤â¤¦¤È¤·¤¿¡£
¤·¤«¤·³«»Ï°ÌÃÖ¤¬¤³¤Î¥Õ¥¡¥¤¥ë¤ÎºÇÂ祪¥Õ¥»¥Ã¥È¤òĶ¤¨¤Æ¤¤¤¿¡£
.SH ½àµò
POSIX.1-2001.
.SH Ãí°Õ
»ÈÍѤ¹¤ëÁ°¤ËÀ©¸æ¥Ö¥í¥Ã¥¯¤ò 0 ¤Ë¤·¤Æ¤ª¤¯¤Î¤Ï¡¢¤è¤¤¹Í¤¨¤Ç¤¢¤ë¡£
¤³¤ÎÀ©¸æ¥Ö¥í¥Ã¥¯¤Ï¡¢Æɤ߹þ¤ßÁàºî¤¬¿Ê¹Ô¤·¤Æ¤¤¤ë´Ö¤ÏÊѹ¹¤¹¤Ù¤­¤Ç¤Ê¤¤¡£
Æɤ߹þ¤Þ¤ì¤ë¥Ð¥Ã¥Õ¥¡Îΰè¤Ï
.\" ¤Þ¤¿¤ÏÁàºî¤ÎÀ©¸æ¥Ö¥í¥Ã¥¯¤Ï
Áàºî¤ÎºÇÃæ¤Ë¥¢¥¯¥»¥¹¤¹¤Ù¤­¤Ç¤Ï¤Ê¤¤¡£
¤µ¤â¤Ê¤¤¤Èµ¯¤³¤ë·ë²Ì¤¬ÉÔÄê¤Ë¤Ê¤ë¡£
¤³¤ì¤Ë´Þ¤Þ¤ì¤ë¥á¥â¥êÎΰè¤Ï¡¢Í­¸ú¤Ê¤Þ¤Þ¤Ë¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
.SH ´ØÏ¢¹àÌÜ
.BR aio_cancel (3),
.BR aio_error (3),
.BR aio_fsync (3),
.BR aio_return (3),
.BR aio_suspend (3),
.BR aio_write (3)