1 .\" Hey Emacs! This file is -*- nroff -*- source.
3 .\" This manpage is Copyright (C) 1992 Drew Eckhardt;
4 .\" 1993 Michael Haardt, Ian Jackson.
7 .\" Permission is granted to make and distribute verbatim copies of this
8 .\" manual provided the copyright notice and this permission notice are
9 .\" preserved on all copies.
11 .\" Permission is granted to copy and distribute modified versions of this
12 .\" manual under the conditions for verbatim copying, provided that the
13 .\" entire resulting derived work is distributed under the terms of a
14 .\" permission notice identical to this one.
16 .\" Since the Linux kernel and libraries are constantly changing, this
17 .\" manual page may be incorrect or out-of-date. The author(s) assume no
18 .\" responsibility for errors or omissions, or for damages resulting from
19 .\" the use of the information contained herein. The author(s) may not
20 .\" have taken the same level of care in the production of this manual,
21 .\" which is licensed free of charge, as they might when working
24 .\" Formatted or processed versions of this manual, if unaccompanied by
25 .\" the source, must acknowledge the copyright and authors of this work.
27 .\" Modified 1993-07-21 by Rik Faith <faith@cs.unc.edu>
28 .\" Modified 1994-08-21 by Michael Haardt
29 .\" Modified 1996-04-13 by Andries Brouwer <aeb@cwi.nl>
30 .\" Modified 1996-05-13 by Thomas Koenig
31 .\" Modified 1996-12-20 by Michael Haardt
32 .\" Modified 1999-02-19 by Andries Brouwer <aeb@cwi.nl>
33 .\" Modified 1998-11-28 by Joseph S. Myers <jsm28@hermes.cam.ac.uk>
34 .\" Modified 1999-06-03 by Michael Haardt
35 .\" Modified 2002-05-07 by Michael Kerrisk <mtk.manpages@gmail.com>
36 .\" Modified 2004-06-23 by Michael Kerrisk <mtk.manpages@gmail.com>
37 .\" 2004-12-08, mtk, reordered flags list alphabetically
38 .\" 2004-12-08, Martin Pool <mbp@sourcefrog.net> (& mtk), added O_NOATIME
39 .\" 2007-09-18, mtk, Added description of O_CLOEXEC + other minor edits
40 .\" 2008-01-03, mtk, with input from Trond Myklebust
41 .\" <trond.myklebust@fys.uio.no> and Timo Sirainen <tss@iki.fi>
42 .\" Rewrite description of O_EXCL.
43 .\" 2008-01-11, Greg Banks <gnb@melbourne.sgi.com>: add more detail
45 .\" 2008-02-26, Michael Haardt: Reorganized text for O_CREAT and mode
47 .\" FIXME . Apr 08: The next POSIX revision has O_EXEC, O_SEARCH, and
48 .\" O_TTYINIT. Eventually these may need to be documented. --mtk
49 .\" FIXME Linux 2.6.33 has O_DSYNC, and a hidden __O_SYNC.
51 .\" Japanese Version Copyright (c) 1997-1999 HANATAKA Shinya
52 .\" all rights reserved.
53 .\" Translated 1999-08-14, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
54 .\" Updated 2001-05-25, Yuichi SATO <ysato444@yahoo.co.jp>
55 .\" Updated & Modified 2002-01-02, Yuichi SATO
56 .\" Updated & Modified 2002-07-07, Yuichi SATO
57 .\" Updated & Modified 2002-09-19, Yuichi SATO
58 .\" Updated & Modified 2003-07-30, Yuichi SATO
59 .\" Updated & Modified 2003-11-27, Yuichi SATO
60 .\" Updated & Modified 2005-01-01, Yuichi SATO
61 .\" Updated & Modified 2005-09-14, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
62 .\" Updated & Modified 2005-10-14, Akihiro MOTOKI
63 .\" Updated & Modified 2006-01-18, Akihiro MOTOKI
64 .\" Updated & Modified 2006-04-15, Akihiro MOTOKI, LDP v2.29
65 .\" Updated 2007-01-07, Akihiro MOTOKI, LDP v2.43
66 .\" Updated 2007-05-01, Akihiro MOTOKI, LDP v2.46
67 .\" Updated 2007-10-12, Akihiro MOTOKI, LDP v2.66
68 .\" Updated 2008-02-12, Akihiro MOTOKI, LDP v2.77
69 .\" Updated 2008-04-04, Akihiro MOTOKI, LDP v2.79
70 .\" Updated 2008-08-08, Akihiro MOTOKI, LDP v3.05
71 .\" Updated 2010-04-23, Akihiro MOTOKI, LDP v3.24
73 .\"WORD: descriptor ¥Ç¥£¥¹¥¯¥ê¥×¥¿
74 .\"WORD: file description ¥Õ¥¡¥¤¥ëµ½Ò
75 .\"WORD: open ¥ª¡¼¥×¥ó
77 .\"WORD: file offset ¥Õ¥¡¥¤¥ë¡¦¥ª¥Õ¥»¥Ã¥È
78 .\"WORD: controling terminal À©¸æüËö
79 .\"WORD: non-blocking I/O ÈóÄä»ß I/O
80 .\"WORD: synchronous I/O Ʊ´ü I/O
81 .\"WORD: permission µö²Ä
82 .\"WORD: user ¥æ¡¼¥¶¡¼
84 .\"WORD: group ¥°¥ë¡¼¥×
86 .\"WORD: kernel ¥«¡¼¥Í¥ë
87 .\"WORD: symbolic link ¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯
88 .\"WORD: dangling symbolic link ²õ¤ì¤¿¥·¥ó¥Ü¥ê¥Ã¥¯¡¦¥ê¥ó¥¯
89 .\"WORD: file creation flag ¥Õ¥¡¥¤¥ëºîÀ®¥Õ¥é¥°
90 .\"WORD: file status flag ¥Õ¥¡¥¤¥ë¾õÂ֥ե饰
92 .TH OPEN 2 2010-09-10 "Linux" "Linux Programmer's Manual"
94 open, creat \- ¥Õ¥¡¥¤¥ë¤ä¥Ç¥Ð¥¤¥¹¤Î¥ª¡¼¥×¥ó¡¢ºîÀ®¤ò¹Ô¤¦
97 .B #include <sys/types.h>
98 .B #include <sys/stat.h>
101 .BI "int open(const char *" pathname ", int " flags );
102 .BI "int open(const char *" pathname ", int " flags ", mode_t " mode );
104 .BI "int creat(const char *" pathname ", mode_t " mode );
111 ¤Ï¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤òÊÖ¤¹¡£
112 ¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ï¡¢¤³¤Î¸å¤Ë³¤¯¥·¥¹¥Æ¥à¥³¡¼¥ë
113 .RB ( read "(2), " write "(2), " lseek "(2), " fcntl "(2) ¤Ê¤É)"
114 ¤Ç»ÈÍѤµ¤ì¤ë¾®¤µ¤ÊÈóÉé¤ÎÀ°¿ô¤Ç¤¢¤ë¡£
115 ¤³¤Î¥·¥¹¥Æ¥à¥³¡¼¥ë¤¬À®¸ù¤·¤¿¾ì¹ç¤ËÊÖ¤µ¤ì¤ë¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ï
116 ¤½¤Î¥×¥í¥»¥¹¤¬¤½¤Î»þÅÀ¤Ç¥ª¡¼¥×¥ó¤·¤Æ¤¤¤Ê¤¤¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Î
117 ¤¦¤ÁºÇ¾®¤Î¿ô»ú¤Î¤â¤Î¤È¤Ê¤ë¡£
119 ¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢¿·¤·¤¤¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ï
121 ¤ò¼Â¹Ô¤·¤¿¸å¤â¥ª¡¼¥×¥ó¤µ¤ì¤¿¤Þ¤Þ¤È¤Ê¤ë (¤Ä¤Þ¤ê¡¢
125 ¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¡¦¥Õ¥é¥°¤ÏºÇ½é¤Ï̵¸ú¤Ç¤¢¤ë;
126 ¸å½Ò¤Î Linux ¸ÇͤΥե饰
128 ¤ò»È¤¦¤È¤³¤Î¥Ç¥Õ¥©¥ë¥È¤òÊѹ¹¤¹¤ë¤³¤È¤¬¤Ç¤¤ë)¡£
129 ¥Õ¥¡¥¤¥ë¡¦¥ª¥Õ¥»¥Ã¥È (file offset) ¤Ï¥Õ¥¡¥¤¥ë¤ÎÀèƬ¤ËÀßÄꤵ¤ì¤ë
134 ¤ò¸Æ¤Ó½Ð¤¹¤È¡¢¡Ö¥ª¡¼¥×¥ó¥Õ¥¡¥¤¥ëµ½Ò¡×
135 .I "(open file description)"
136 ¤¬ºîÀ®¤µ¤ì¤ë¡£¥Õ¥¡¥¤¥ëµ½Ò¤È¤Ï¡¢¥·¥¹¥Æ¥àÁ´ÂΤÎ
137 ¥ª¡¼¥×¥óÃæ¤Î¥Õ¥¡¥¤¥ë¤Î¥Æ¡¼¥Ö¥ë¤Î¥¨¥ó¥È¥ê¤Ç¤¢¤ë¡£
138 ¤³¤Î¥¨¥ó¥È¥ê¤Ï¡¢¥Õ¥¡¥¤¥ë¡¦¥ª¥Õ¥»¥Ã¥È¤È¥Õ¥¡¥¤¥ë¾õÂ֥ե饰
141 Áàºî¤Ë¤è¤êÊѹ¹²Äǽ) ¤¬ÊÝ»ý¤¹¤ë¡£
142 ¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ï¤³¤ì¤é¤Î¥¨¥ó¥È¥ê¤Î°ì¤Ä¤Ø¤Î»²¾È¤Ç¤¢¤ë¡£
145 ¤¬ºï½ü¤µ¤ì¤¿¤ê¡¢Â¾¤Î¥Õ¥¡¥¤¥ë¤ò»²¾È¤¹¤ë¤è¤¦¤ËÊѹ¹¤µ¤ì¤¿¤ê¤·¤Æ¤â¡¢
146 ¤³¤Î»²¾È¤Ï±Æ¶Á¤ò¼õ¤±¤Ê¤¤¡£
147 ¿·¤·¤¤¥ª¡¼¥×¥ó¥Õ¥¡¥¤¥ëµ½Ò¤ÏºÇ½é¤Ï¾¤Î¤É¤Î¥×¥í¥»¥¹¤È¤â
150 ¤Ç¶¦Í¤¬µ¯¤³¤ë¾ì¹ç¤¬¤¢¤ë¡£
155 .BR O_RDONLY ", " O_WRONLY ", " O_RDWR
156 ¤Î¤É¤ì¤«¤Ò¤È¤Ä¤¬Æþ¤Ã¤Æ¤¤¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
157 ¤³¤ì¤é¤Ï¤½¤ì¤¾¤ìÆɤ߹þ¤ßÀìÍÑ¡¢½ñ¤¹þ¤ßÀìÍÑ¡¢Æɤ߽ñ¤ÍѤË
158 ¥Õ¥¡¥¤¥ë¤ò¥ª¡¼¥×¥ó¤¹¤ë¤³¤È¤òÍ׵᤹¤ë¤â¤Î¤Ç¤¢¤ë¡£
162 ¤Ë¤Ï¡¢¥Õ¥¡¥¤¥ëºîÀ®¥Õ¥é¥° (file creation flag) ¤È¥Õ¥¡¥¤¥ë¾õÂ֥ե饰
163 (file status flag) ¤ò 0 ¸Ä°Ê¾å¡Ö¥Ó¥Ã¥Èñ°Ì¤Î OR (bitwise-or)¡×¤Ç
164 »ØÄꤹ¤ë¤³¤È¤¬¤Ç¤¤ë¡£
165 .I ¥Õ¥¡¥¤¥ëºîÀ®¥Õ¥é¥°
167 .BR O_CREAT ", " O_EXCL ", " O_NOCTTY ", " O_TRUNC
169 .I ¥Õ¥¡¥¤¥ë¾õÂ֥ե饰
170 ¤Ï°Ê²¼¤Î¥ê¥¹¥È¤Î¤¦¤Á¾åµ°Ê³°¤Î»Ä¤ê¤Î¤â¤Î¤Ç¤¢¤ë¡£
171 .\" FIXME . Actually is it true that the "file status flags" are all of the
172 .\" remaining flags listed below? SUSv4 divides the flags into:
176 .\" * Other (O_CLOEXEC, O_DIRECTORY, O_NOFOLLOW)
177 .\" though it's not clear what the difference between "other" and
178 .\" "File creation" flags is. (I've raised an Aardvark to see if this
179 .\" can be clarified in SUSv4; 10 Oct 2008.)
180 Æó¼ïÎà¤Î¥Õ¥é¥°¤Î°ã¤¤¤Ï¡¢¥Õ¥¡¥¤¥ë¾õÂ֥ե饰¤ÎÊý¤Ï
182 ¤ò»È¤Ã¤Æ¤½¤ÎÆâÍƤò¼èÆÀ¤·¤¿¤ê (¾ì¹ç¤Ë¤è¤Ã¤Æ¤Ï) Êѹ¹¤·¤¿¤ê¤Ç¤¤ëÅÀ¤Ë¤¢¤ë¡£
183 ¥Õ¥¡¥¤¥ëºîÀ®¥Õ¥é¥°¤È¥Õ¥¡¥¤¥ë¾õÂ֥ե饰¤ÎÁ´¥ê¥¹¥È¤ò°Ê²¼¤Ë¼¨¤¹:
186 ¥Õ¥¡¥¤¥ë¤òÄɲà (append) ¥â¡¼¥É¤Ç¥ª¡¼¥×¥ó¤¹¤ë¡£
191 ¤ò¹Ô¤Ã¤¿¤«¤Î¤è¤¦¤Ë¡¢¥Õ¥¡¥¤¥ë¡¦¥Ý¥¤¥ó¥¿¡¼¤ò¥Õ¥¡¥¤¥ë¤ÎºÇ¸å¤Ë°ÜÆ°¤¹¤ë¡£
192 .\" For more background, see
193 .\" http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=453946
194 .\" http://nfs.sourceforge.net/
195 NFS ¥Õ¥¡¥¤¥ë¡¦¥·¥¹¥Æ¥à¤Ç¡¢
197 ¤ò»ÈÍѤ¹¤ë¤È¡¢Ê£¿ô¤Î¥×¥í¥»¥¹¤¬¤Ò¤È¤Ä¤Î¥Õ¥¡¥¤¥ë¤ËƱ»þ¤Ë¥Ç¡¼¥¿¤òÄɲä·¤¿¾ì¹ç¡¢
198 ¥Õ¥¡¥¤¥ë¤¬²õ¤ì¤Æ¤·¤Þ¤¦¤³¤È¤¬¤¢¤ë¡£
199 ¤³¤ì¤Ï NFS ¤¬Äɲå⡼¥É¤ò¥µ¥Ý¡¼¥È¤·¤Æ¤¤¤Ê¤¤¤¿¤á¡¢
200 ¥¯¥é¥¤¥¢¥ó¥È¤Î¥«¡¼¥Í¥ë (kernel) ¤¬¤½¤ì¤ò¥·¥ß¥å¥ì¡¼¥È¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¤Î¤À¤¬¡¢
201 ¶¥¹ç¾õÂÖ¤òÈò¤±¤ë¤³¤È¤Ï¤Ç¤¤Ê¤¤¤«¤é¤Ç¤¢¤ë¡£
204 ¥·¥°¥Ê¥ë¶îÆ° I/O (signal-driven I/O) ¤ò͸ú¤Ë¤¹¤ë:
205 ¤³¤Î¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ø¤Î
206 ÆþÎϤޤ¿¤Ï½ÐÎϤ¬²Äǽ¤Ë¤Ê¤Ã¤¿¾ì¹ç¤Ë¡¢¥·¥°¥Ê¥ë¤òÀ¸À®¤¹¤ë
211 ¤Ë¤è¤Ã¤ÆÊѹ¹²Äǽ¤Ç¤¢¤ë)¡£
212 ¤³¤Îµ¡Ç½¤¬»ÈÍѲÄǽ¤Ê¤Î¤ÏüËö¡¢µ¿»÷üËö¡¢¥½¥±¥Ã¥È¤Î¤ß¤Ç¤¢¤ê¡¢
213 (Linux 2.6 °Ê¹ß¤Ç¤Ï) ¥Ñ¥¤¥×¤È FIFO ¤ËÂФ·¤Æ¤â»ÈÍѤǤ¤ë¡£
218 .BR O_CLOEXEC " (Linux 2.6.23 °Ê¹ß)"
219 ¿·¤·¤¤¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤ËÂФ·¤Æ close-on-exec ¥Õ¥é¥°¤ò͸ú¤Ë¤¹¤ë¡£
220 ¤³¤Î¥Õ¥é¥°¤ò»ØÄꤹ¤ë¤³¤È¤Ç¡¢¥×¥í¥°¥é¥à¤Ï
222 ¥Õ¥é¥°¤ò¥»¥Ã¥È¤¹¤ë¤¿¤á¤Î
225 Áàºî¤òÊÌÅӸƤӽФ¹É¬Íפ¬¤Ê¤¯¤Ê¤ë¡£
226 ¤Þ¤¿¡¢¤¢¤ë¼ï¤Î¥Þ¥ë¥Á¥¹¥ì¥Ã¥É¤Î¥×¥í¥°¥é¥à¤Ï¤³¤Î¥Õ¥é¥°¤Î»ÈÍѤÏ
227 ÉԲķç¤Ç¤¢¤ë¡£¤Ê¤¼¤Ê¤é¡¢¸ÄÊ̤Ë
232 Áàºî¤ò¸Æ¤Ó½Ð¤·¤¿¤È¤·¤Æ¤â¡¢¤¢¤ë¥¹¥ì¥Ã¥É¤¬¥Õ¥¡¥¤¥ë¥Ç¥£¥¹¥¯¥ê¥×¥¿¤ò
233 ¥ª¡¼¥×¥ó¤¹¤ë¤Î¤ÈƱ»þ¤ËÊ̤Υ¹¥ì¥Ã¥É¤¬
237 ¤ò¼Â¹Ô¤¹¤ë¤È¤¤¤¦¶¥¹ç¾ò·ï¤òÈò¤±¤ë¤Î¤Ë¤Ï½½Ê¬¤Ç¤Ï¤Ê¤¤¤«¤é¤Ç¤¢¤ë¡£
238 .\" This flag fixes only one form of the race condition;
239 .\" The race can also occur with, for example, descriptors
240 .\" returned by accept(), pipe(), etc.
243 ¥Õ¥¡¥¤¥ë¤¬Â¸ºß¤·¤Ê¤«¤Ã¤¿¾ì¹ç¤ÏºîÀ® (create) ¤¹¤ë¡£
244 ¥Õ¥¡¥¤¥ë¤Î½êÍ¼Ô (¥æ¡¼¥¶¡¼ ID) ¤Ï¡¢¥×¥í¥»¥¹¤Î¼Â¸ú¥æ¡¼¥¶¡¼ ID ¤ËÀßÄꤵ¤ì¤ë¡£
245 ¥°¥ë¡¼¥×½ê͸¢ (¥°¥ë¡¼¥× ID) ¤Ï¡¢¥×¥í¥»¥¹¤Î¼Â¸ú¥°¥ë¡¼¥× ID
246 ¤Þ¤¿¤Ï¿Æ¥Ç¥£¥ì¥¯¥È¥ê¤Î¥°¥ë¡¼¥× ID ¤ËÀßÄꤵ¤ì¤ë
247 (¤³¤ì¤Ï¡¢¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¥¿¥¤¥×¡¢¥Þ¥¦¥ó¥È¥ª¥×¥·¥ç¥ó¡¢
248 ¿Æ¥Ç¥£¥ì¥¯¥È¥ê¤Î¥â¡¼¥É¤Ë°Í¸¤¹¤ë¡£
250 ¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë¥Þ¥¦¥ó¥È¥ª¥×¥·¥ç¥ó
255 .\" 2.6.25 »þÅÀ¤Ç¤Ï¡¢bsdgroups ¤Ï ext2, ext3, ext4, XFS ¤Ç¥µ¥Ý¡¼¥È
256 .\" ¤µ¤ì¤Æ¤¤¤ë (2.6.14 °Ê¹ß)¡£
260 ¤Ï¿·¤·¤¤¥Õ¥¡¥¤¥ë¤òºîÀ®¤¹¤ë¾ì¹ç¤Ë»ÈÍѤ¹¤ë¥¢¥¯¥»¥¹µö²Ä (permission) ¤ò»ØÄꤹ¤ë¡£
264 ¤¬»ØÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç¡¢
266 ¤ò»ØÄꤷ¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
268 ¤¬»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¡¢
271 ͸ú¤Ê¥¢¥¯¥»¥¹µö²Ä¤Ï¡¢ÉáÃʤÈƱ¤¸¤è¤¦¤Ë¥×¥í¥»¥¹¤Î
273 ¤Ë¤è¤Ã¤Æ½¤Àµ¤µ¤ì¡¢ºîÀ®¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤Îµö²Ä¤Ï
274 .I "(mode\ &\ ~umask)"
276 ¤³¤Î¥â¡¼¥É¤Ï¡¢¿·¤·¤¯ºîÀ®¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤ËÂФ¹¤ë¤½¤ì°Ê¹ß¤Î¥¢¥¯¥»¥¹
277 ¤Ë¤Î¤ßŬÍѤµ¤ì¤ëÅÀ¤ËÃí°Õ¤¹¤ë¤³¤È¡£
278 Æɤ߼è¤êÀìÍѤΥե¡¥¤¥ë¤òºîÀ®¤¹¤ë
281 Æɤ߽ñ¤²Äǽ¤Ê¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤òÊÖ¤¹¤³¤È¤¬¤¢¤ê¤¦¤ë¡£
284 ¤Î¤¿¤á¤Ë°Ê²¼¤Î¥·¥ó¥Ü¥ëÄê¿ô¤¬Ä󶡤µ¤ì¤Æ¤¤¤ë :
287 00700 ¥æ¡¼¥¶¡¼ (¥Õ¥¡¥¤¥ë¤Î½êͼÔ) ¤ËÆɤ߹þ¤ß¡¢½ñ¤¹þ¤ß¡¢
291 00400 ¥æ¡¼¥¶¡¼¤ËÆɤ߹þ¤ß¤Îµö²Ä¤¬¤¢¤ë¡£
294 00200 ¥æ¡¼¥¶¡¼¤Ë½ñ¤¹þ¤ß¤Îµö²Ä¤¬¤¢¤ë¡£
297 00100 ¥æ¡¼¥¶¡¼¤Ë¼Â¹Ô¤Îµö²Ä¤¬¤¢¤ë¡£
300 00070 ¥°¥ë¡¼¥×¤ËÆɤ߹þ¤ß¡¢½ñ¤¹þ¤ß¡¢¼Â¹Ô¤Îµö²Ä¤¬¤¢¤ë¡£
303 00040 ¥°¥ë¡¼¥×¤ËÆɤ߹þ¤ß¤Îµö²Ä¤¬¤¢¤ë¡£
306 00020 ¥°¥ë¡¼¥×¤Ë½ñ¤¹þ¤ß¤Îµö²Ä¤¬¤¢¤ë¡£
309 00010 ¥°¥ë¡¼¥×¤Ë¼Â¹Ô¤Îµö²Ä¤¬¤¢¤ë¡£
312 00007 ¾¿Í (others) ¤ËÆɤ߹þ¤ß¡¢½ñ¤¹þ¤ß¡¢¼Â¹Ô¤Îµö²Ä¤¬¤¢¤ë¡£
315 00004 ¾¿Í¤ËÆɤ߹þ¤ß¤Îµö²Ä¤¬¤¢¤ë¡£
318 00002 ¾¿Í¤Ë½ñ¤¹þ¤ß¤Îµö²Ä¤¬¤¢¤ë¡£
321 00001 ¾¿Í¤Ë¼Â¹Ô¤Îµö²Ä¤¬¤¢¤ë¡£
324 .BR O_DIRECT " (Linux 2.4.10 °Ê¹ß)"
325 ¤³¤Î¥Õ¥¡¥¤¥ë¤ËÂФ¹¤ë I/O ¤Î¥¥ã¥Ã¥·¥å¤Î¸ú²Ì¤òºÇ¾®²½¤·¤è¤¦¤È¤¹¤ë¡£
326 ¤³¤Î¥Õ¥é¥°¤ò»È¤¦¤È¡¢°ìÈÌŪ¤ËÀǽ¤¬Äã²¼¤¹¤ë¡£
327 ¤·¤«¤·¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤¬Æȼ«¤Ë¥¥ã¥Ã¥·¥ó¥°¤ò¹Ô¤Ã¤Æ¤¤¤ë¤è¤¦¤Ê
328 ÆÃÊ̤ʾì¹ç¤Ë¤ÏÌò¤ËΩ¤Ä¡£
329 ¥Õ¥¡¥¤¥ë¤Î I/O ¤Ï¥æ¡¼¥¶¡¼¶õ´Ö¥Ð¥Ã¥Õ¥¡¤ËÂФ·¤ÆľÀܹԤï¤ì¤ë¡£
331 ¥Õ¥é¥°¼«¿È¤Ï¥Ç¡¼¥¿¤òƱ´ü¤ÇžÁ÷¤·¤è¤¦¤È¤Ï¤¹¤ë¤¬¡¢
333 ¤Î¤è¤¦¤Ë¥Ç¡¼¥¿¤ÈɬÍפʥ᥿¥Ç¡¼¥¿¤ÎžÁ÷¤¬Êݾڤµ¤ì¤ë¤ï¤±¤Ç¤Ï¤Ê¤¤¡£
334 Ʊ´ü I/O ¤òÊݾڤ¹¤ë¤¿¤á¤Ë¤Ï¡¢
338 ¤ò»ÈÍѤ·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¡£
339 ¡ÖÃí°Õ¡×¤ÎÀá (²¼µ) ¤ÎµÄÏÀ¤â»²¾È¡£
341 ¥Ö¥í¥Ã¥¯¥Ç¥Ð¥¤¥¹¤ËÂФ¹¤ë»÷Ä̤ä¿°ÕÌ£¤Î¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤¬
343 ¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë (⤷¡¢¤³¤Î¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤ÏÈó¿ä¾©¤Ç¤¢¤ë)¡£
346 \fIpathname\fP ¤¬¥Ç¥£¥ì¥¯¥È¥ê¤Ç¤Ê¤±¤ì¤Ð¥ª¡¼¥×¥ó¤Ï¼ºÇÔ¤¹¤ë¡£
347 .\" °Ê²¼¤Îµ»ö¤È¤½¤Î¥ê¥×¥é¥¤¤ò»²¾È¤Î¤³¤È¡£
348 .\" http://marc.theaimsgroup.com/?t=112748702800001&r=1&w=2
349 .\" [PATCH] open: O_DIRECTORY and O_CREAT together should fail
350 .\" O_DIRECTORY | O_CREAT ¤ò»ØÄꤹ¤ë¤È O_DIRECTORY ¤¬Ìµ»ë¤µ¤ì¤Æ¤·¤Þ¤¦¡£
351 ¤³¤Î¥Õ¥é¥°¤Ï Linux ÆÃͤǤ¢¤ê¡¢
353 ¤¬ FIFO ¤ä¥Æ¡¼¥×¥Ç¥Ð¥¤¥¹¤ËÂФ·¤Æ¥³¡¼¥ë¤µ¤ì¤¿¾ì¹ç¤Î
354 ¥µ¡¼¥Ó¥¹ÉÔǽ (denial-of-service) ¹¶·â¤òÈò¤±¤ë¤¿¤á¤Ë
355 ¥«¡¼¥Í¥ë 2.1.126 ¤ÇÄɲ䵤줿¡£
358 ¤Î¼ÂÁõ°Ê³°¤Ç¤Ï»ÈÍѤ¹¤ë¤Ù¤¤Ç¤Ï¤Ê¤¤¡£
361 ¤³¤Î¸Æ¤Ó½Ð¤·¤Ç¥Õ¥¡¥¤¥ë¤¬ºîÀ®¤µ¤ì¤ë¤³¤È¤òÊݾڤ¹¤ë¡£
366 ¤Î¥Õ¥¡¥¤¥ë¤¬´û¤Ë¸ºß¤·¤¿¾ì¹ç¡¢
370 ¤¬»ØÄꤵ¤ì¤Ê¤«¤Ã¤¿¾ì¹ç¤Î
372 ¤ÎÆ°ºî¤Ï̤ÄêµÁ¤Ç¤¢¤ë¡£
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375 .\" POSIX.1-2001 ¤Ç¤ÏÌÀ¼¨Åª¤Ë¤³¤ÎÆ°ºî¤òÍ׵ᤷ¤Æ¤¤¤ë¡£
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430 .\" The O_NOATIME flag also affects the treatment of st_atime
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610 .I -D_FILE_OFFSET_BITS=64
611 ¤ò»ØÄꤻ¤º¤Ë¥³¥ó¥Ñ¥¤¥ë¤µ¤ì¤¿¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤¬¡¢¥Õ¥¡¥¤¥ë¥µ¥¤¥º¤¬
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617 ¤³¤ì¤Ï POSIX.1-2001 ¤Çµ¬Äꤵ¤ì¤Æ¤¤¤ë¥¨¥é¡¼¤Ç¤¢¤ë¡£
618 2.6.24 ¤è¤êÁ°¤Î¥«¡¼¥Í¥ë¤Ç¤Ï¡¢Linux ¤Ï¤³¤Î¾ì¹ç¤Ë¥¨¥é¡¼
621 .\" See http://bugzilla.kernel.org/show_bug.cgi?id=7253
622 .\" "Open of a large file on 32-bit fails with EFBIG, should be EOVERFLOW"
623 .\" Reported 2006-10-03
627 ¥Õ¥é¥°¤¬»ØÄꤵ¤ì¤¿¤¬¡¢¸Æ¤Ó½Ð¤·¸µ¤Î¼Â¸ú¥æ¡¼¥¶¡¼ ID ¤¬
628 .\" ¸·Ì©¤Ë¸À¤¨¤Ð¡¢¸Æ¤Ó½Ð¤·¸µ¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à UID...(MTK)
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648 SVr4, 4.3BSD, POSIX.1-2001.
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654 ¤³¤ì¤é¤Î¥Õ¥é¥°¤ÎÄêµÁ¤òÆÀ¤ë¤¿¤á¤Ë¤Ï¡¢
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692 .B "O_RDONLY | O_WRONLY"
693 ¤ÎÁȤ߹ç¤ï¤»¤ÏÏÀÍýŪ¤Ë´Ö°ã¤¤¤Ç¤¢¤ê¡¢³Î¤«¤Ë
696 Linux ¤Ç¤Ï¡¢ÆÃÊ̤ʡ¢Èóɸ½à¤Ê¥¢¥¯¥»¥¹¥â¡¼¥É¤È¤·¤Æ 3 (¥Ð¥¤¥Ê¥ê¤Ç¤Ï 11) ¤¬
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706 .\" See for example util-linux's disk-utils/setfdprm.c
707 .\" For some background on access mode 3, see
708 .\" http://thread.gmane.org/gmane.linux.kernel/653123
709 .\" "[RFC] correct flags to f_mode conversion in __dentry_open"
710 .\" LKML, 12 Mar 2008
712 .B O_RDONLY | O_TRUNC
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715 .\" Linux 2.0, 2.5: truncate
716 .\" Solaris 5.7, 5.8: truncate
717 .\" Irix 6.5: truncate
718 .\" Tru64 5.1B: truncate
719 .\" HP-UX 11.22: truncate
720 .\" FreeBSD 4.7: truncate
722 NFS ¤ò¼Â¸½¤·¤Æ¤¤¤ë¥×¥í¥È¥³¥ë¤Ë¤Ï¿¤¯¤ÎÉÔÈ÷¤¬¤¢¤ê¡¢ÆäË
723 .BR O_SYNC " ¤È " O_NDELAY
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742 ¤Û¤È¤ó¤É¤Î Linux ¤Î¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Ï¡¢¼ÂºÝ¤Ë¤Ï POSIX ¤Î
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899 .\" FIXME . Check bugzilla report on open(O_ASYNC)
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920 .BR feature_test_macros (7),
922 .BR path_resolution (7),