[linuxjm/LDP_man-pages.git] / draft / man2 / flock.2

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.\"
.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu) and
.\" and Copyright 2002 Michael Kerrisk
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Modified Fri Jan 31 16:26:07 1997 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified Fri Dec 11 17:57:27 1998 by Jamie Lokier <jamie@imbolc.ucc.ie>
.\" Modified 24 Apr 2002 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"     Substantial rewrites and additions
.\" 2005-05-10 mtk, noted that lock conversions are not atomic.
.\"
.\" Japanese Version Copyright (c) 1996 Takeshi Ueno
.\"         all rights reserved.
.\" Translated 1996-07-03, Takeshi Ueno <tueno@vio.co.jp>
.\" Modified 1997-12-14, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified 1999-08-14, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified 2002-09-24, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Modified 2005-02-26, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2005-09-06, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH FLOCK 2 2009-07-25 "Linux" "Linux Programmer's Manual"
.\"O .SH NAME
.\"O flock \- apply or remove an advisory lock on an open file
.SH ̾Á°
flock \- ¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤ËÂФ¹¤ë¥¢¥É¥Ð¥¤¥¶¥ê¡¦¥í¥Ã¥¯¤ÎŬÍÑ¡¢²ò½ü¤ò¹Ô¤¦
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.B #include <sys/file.h>
.sp
.BI "int flock(int " fd ", int " operation );
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O Apply or remove an advisory lock on the open file specified by
.\"O .IR fd .
.\"O The argument
.\"O .I operation
.\"O is one of the following:
¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤Ë¥¢¥É¥Ð¥¤¥¶¥ê¡¦¥í¥Ã¥¯ (advisory lock) ¤ÎŬÍÑ
¤ä²ò½ü¤ò¹Ô¤¦¡£
¥Õ¥¡¥¤¥ë¤Ï
.I fd
¤Ç»ØÄꤹ¤ë¡£°ú¤­¿ô
.I operation
¤Ë¤Ï°Ê²¼¤Î¤¤¤º¤ì¤«°ì¤Ä¤ò»ØÄꤹ¤ë:
.RS 4
.TP 9
.B LOCK_SH
.\"O Place a shared lock.
.\"O More than one process may hold a shared lock for a given file
.\"O at a given time.
¶¦Í­¥í¥Ã¥¯¤òŬÍѤ¹¤ë¡£ »ØÄꤷ¤¿¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ¡¢
°ì¤Ä°Ê¾å¤Î¥×¥í¥»¥¹¤¬Æ±»þ¤Ë¶¦Í­¥í¥Ã¥¯¤òÊÝ»ý¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
.TP
.B LOCK_EX
.\"O Place an exclusive lock.
.\"O Only one process may hold an exclusive lock for a given
.\"O file at a given time.
ÇÓ¾¥í¥Ã¥¯¤òŬÍѤ¹¤ë¡£  »ØÄꤷ¤¿¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ¡¢
¤¿¤À°ì¤Ä¤Î¥×¥í¥»¥¹¤À¤±¤¬Æ±»þ¤ËÇÓ¾¥í¥Ã¥¯¤òÊÝ»ý¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
.TP
.B LOCK_UN
.\"O Remove an existing lock held by this process.
¤³¤Î¥×¥í¥»¥¹¤¬ÊÝ»ý¤·¤Æ¤¤¤ë´û¸¤Î¥í¥Ã¥¯¤ò²ò½ü¤¹¤ë¡£
.RE
.PP
.\"O A call to
.\"O .BR flock ()
.\"O may block if an incompatible lock is held by another process.
.\"O To make a nonblocking request, include
.\"O .B LOCK_NB
.\"O (by
.\"O .IR OR ing)
.\"O with any of the above operations.
.BR flock ()
¤ò¸Æ¤Ó½Ð¤·¤¿¤È¤­¤Ë¡¢»ØÄꤷ¤¿¥í¥Ã¥¯¼ïÊ̤Ȱۤʤë¥í¥Ã¥¯¤¬ÊÌ¥×¥í¥»¥¹¤Ë¤è¤Ã¤Æ
ÊÝ»ý¤µ¤ì¤Æ¤¤¤ë¤È¡¢
.BR flock ()
¤ÏÄä»ß (block) ¤µ¤ì¤ë¤³¤È¤¬¤¢¤ë¡£
ÈóÄä»ß (nonblocking) ¥¿¥¤¥×¤ÎÍ×µá¤ò¹Ô¤¦¤¿¤á¤Ë¤Ï¡¢
¾åµ­¤ÎÁàºî (operation) ¤Ë
.B LOCK_NB
¤òÏÀÍýϤηÁ¤Ç»ØÄꤹ¤ë¡£

.\"O A single file may not simultaneously have both shared and exclusive locks.
°ì¤Ä¤Î¥Õ¥¡¥¤¥ë¤Ë¶¦Í­¥í¥Ã¥¯¤ÈÇÓ¾¥í¥Ã¥¯¤òƱ»þ¤ËÀßÄꤹ¤ë¤³¤È¤Ï¤Ç¤­¤Ê¤¤¡£

.\"O Locks created by
.\"O .BR flock ()
.\"O are associated with an open file table entry.
.\"O This means that duplicate file descriptors (created by, for example,
.\"O .BR fork (2)
.\"O or
.\"O .BR dup (2))
.\"O refer to the same lock, and this lock may be modified
.\"O or released using any of these descriptors.
.BR flock ()
¤Ë¤è¤Ã¤Æºî¤é¤ì¤ë¥í¥Ã¥¯¤Ï¡¢
¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤Î¥Æ¡¼¥Ö¥ë¡¦¥¨¥ó¥È¥ê¤È´ØÏ¢ÉÕ¤±¤é¤ì¤ë¡£
¤·¤¿¤¬¤Ã¤Æ¡¢¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤ÎÊ£À½
.RB ( fork (2)
¤ä
.BR dup (2)
¤Ê¤É¤Ë¤è¤êºîÀ®¤µ¤ì¤ë) ¤ÏƱ¤¸¥í¥Ã¥¯¤ò»²¾È¤·¡¢
¤³¤ì¤é¤Î¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Î¤É¤ì¤ò»È¤Ã¤Æ¤â
¤³¤Î¥í¥Ã¥¯¤òÊѹ¹¤·¤¿¤ê²òÊü¤·¤¿¤ê¤Ç¤­¤ë¡£
.\"O Furthermore, the lock is released either by an explicit
.\"O .B LOCK_UN
.\"O operation on any of these duplicate descriptors, or when all
.\"O such descriptors have been closed.
¤Þ¤¿¡¢¥í¥Ã¥¯¤Î²òÊü¤Ï¡¢
¾åµ­¤ÎÊ£¿ô¤Î¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Î¤¤¤º¤ì¤«¤ËÂФ·¤Æ
ÌÀ¼¨Åª¤Ë
.B LOCK_UN
Áàºî¤ò»Ø¼¨¤·¤¿¾ì¹ç¤«¡¢¤³¤ì¤é¤Î¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤¬¤¹¤Ù¤Æ
ÊĤ¸¤é¤ì¤¿¾ì¹ç¤Ë¹Ô¤ï¤ì¤ë¡£

.\"O If a process uses
.\"O .BR open (2)
.\"O (or similar) to obtain more than one descriptor for the same file,
.\"O these descriptors are treated independently by
.\"O .BR flock ().
.\"O An attempt to lock the file using one of these file descriptors
.\"O may be denied by a lock that the calling process has
.\"O already placed via another descriptor.
¤¢¤ë¥×¥í¥»¥¹¤¬
.BR open (2)
(¤â¤·¤¯¤ÏƱÍͤÎÊýË¡) ¤ò»È¤Ã¤ÆƱ¤¸¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ
Ê£¿ô¤Î¥Ç¥£¥¹¥¯¥ê¥×¥¿¤ò¼èÆÀ¤·¤¿¾ì¹ç¡¢
.BR flock ()
¤Ï¤³¤ì¤éÊ£¿ô¤Î¥Ç¥£¥¹¥¯¥ê¥×¥¿¤ò³Æ¡¹ÆÈΩ¤Î¤â¤Î¤È¤·¤Æ°·¤¦¡£
¤³¤ì¤é¤Î¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Î°ì¤Ä¤ò»È¤Ã¤Æ¥Õ¥¡¥¤¥ë¤ò¥í¥Ã¥¯¤·¤è¤¦¤È
¤·¤¿ºÝ¡¢¤½¤Î¥í¥Ã¥¯Í×µá¤Ï¡¢¸Æ¤Ó½Ð¤·¸µ¤Î¥×¥í¥»¥¹¤¬¤½¤Î¥Õ¥¡¥¤¥ë¤ÎÊ̤Î
¥Ç¥£¥¹¥¯¥ê¥×¥¿·Ðͳ¤Ç¤¹¤Ç¤ËÀßÄꤷ¤Æ¤¤¤ë¥í¥Ã¥¯¤Ë¤è¤Ã¤ÆµñÈݤµ¤ì¤ë¾ì¹ç¤¬¤¢¤ë¡£

.\"O A process may only hold one type of lock (shared or exclusive)
.\"O on a file.
.\"O Subsequent
.\"O .BR flock ()
.\"O calls on an already locked file will convert an existing lock to the new
.\"O lock mode.
°ì¤Ä¤Î¥×¥í¥»¥¹¤Ï¡¢°ì¤Ä¤Î¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ (¶¦Í­¥í¥Ã¥¯¤ÈÇÓ¾¥í¥Ã¥¯¤Î¤¦¤Á)
¤¤¤º¤ì¤«°ì¼ïÎà¤Î¥í¥Ã¥¯¤·¤«ÀßÄê¤Ç¤­¤Ê¤¤¡£
´û¤Ë¥í¥Ã¥¯¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¤ËÂФ·¤Æ
.BR flock ()
¤ò¸Æ¤Ó½Ð¤¹¤È¡¢´û¸¤Î¥í¥Ã¥¯¤ò¿·¤·¤¤¥í¥Ã¥¯¥â¡¼¥É¤ËÊѹ¹¤¹¤ë¤³¤È¤Ë¤Ê¤ë¡£

.\"O Locks created by
.\"O .BR flock ()
.\"O are preserved across an
.\"O .BR execve (2).
.BR flock ()
¤Ë¤è¤êºîÀ®¤µ¤ì¤¿¥í¥Ã¥¯¤Ï
.BR execve (2)
¤ÎÁ°¸å¤ÇÊݸ¤µ¤ì¤ë¡£

.\"O A shared or exclusive lock can be placed on a file regardless of the
.\"O mode in which the file was opened.
¶¦Í­¥í¥Ã¥¯¤âÇÓ¾¥í¥Ã¥¯¤â¡¢¥Õ¥¡¥¤¥ë¤¬¤É¤Î¥â¡¼¥É¤Ç¥ª¡¼¥×¥ó¤µ¤ì¤¿¤«¤Ë
´Ø·¸¤Ê¤¯Å¬ÍѤ¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
.\"O .SH "RETURN VALUE"
.SH ÊÖ¤êÃÍ
.\"O On success, zero is returned.
.\"O On error, \-1 is returned, and
.\"O .I errno
.\"O is set appropriately.
À®¸ù¤Î¾ì¹ç¡¢0 ¤¬ÊÖ¤µ¤ì¤ë¡£¥¨¥é¡¼¤Î¾ì¹ç¤Ï¡¢\-1 ¤¬ÊÖ¤µ¤ì¡¢
.I errno
¤ËŬÀÚ¤ÊÃͤ¬ÀßÄꤵ¤ì¤ë¡£
.\"O .SH ERRORS
.SH ¥¨¥é¡¼
.TP
.B EBADF
.\"O .I fd
.\"O is not an open file descriptor.
.I fd
¤¬¥ª¡¼¥×¥ó¤µ¤ì¤¿¥Õ¥¡¥¤¥ë¡¦¥Ç¥£¥¹¥¯¥ê¥×¥¿¤Ç¤Ï¤Ê¤¤¡£
.TP
.B EINTR
.\"O While waiting to acquire a lock, the call was interrupted by
.\"O delivery of a signal caught by a handler; see
.\"O .BR signal (7).
¥í¥Ã¥¯¤Î³ÍÆÀ¤òÂԤäƤ¤¤ë´Ö¤Ë¡¢¥Ï¥ó¥É¥é¤Ë¤è¤êÊ᪤µ¤ì¤¿¥·¥°¥Ê¥ë¤ò
¼õ¿®¤·¡¢
.BR flock ()
¤¬ÃæÃǤµ¤ì¤¿¡£
.BR signal (7)
»²¾È¡£
.TP
.B EINVAL
.\"O .I operation
.\"O is invalid.
.I oepration
¤¬Ìµ¸ú¤Ç¤¢¤ë¡£
.TP
.B ENOLCK
.\"O The kernel ran out of memory for allocating lock records.
¥í¥Ã¥¯¡¦¥ì¥³¡¼¥É¤ò³ä¤êÅö¤Æ¤ë¤¿¤á¤Î¥á¥â¥ê¤¬ÉÔ­¤·¤Æ¤¤¤ë¡£
.TP
.B EWOULDBLOCK
.\"O The file is locked and the
.\"O .B LOCK_NB
.\"O flag was selected.
»ØÄꤷ¤¿¥Õ¥¡¥¤¥ë¤¬¥í¥Ã¥¯¤µ¤ì¤Æ¤ª¤ê¡¢
.B LOCK_NB
¥Õ¥é¥°¤¬»ØÄꤵ¤ì¤Æ¤¤¤ë¡£
.\"O .SH "CONFORMING TO"
.SH ½àµò
.\"O 4.4BSD (the
.\"O .BR flock ()
.\"O call first appeared in 4.2BSD).
4.4BSD
.RB ( flock ()
¥³¡¼¥ë¤Ï 4.2BSD ¤ÇºÇ½é¤ËÅо줷¤¿)¡£
.\"O A version of
.\"O .BR flock (),
.\"O possibly implemented in terms of
.\"O .BR fcntl (2),
.\"O appears on most Unix systems.
.BR fcntl (2)
¤Ç¼ÂÁõ¤µ¤ì¤Æ¤¤¤ë¤â¤Î¤Ê¤É¤ò´Þ¤á¤ë¤È¡¢
.BR flock ()
¤Îµ¡Ç½¤Ï¤Û¤È¤ó¤É¤Î Unix ¥·¥¹¥Æ¥à¤Ç¼ÂÁõ¤µ¤ì¤Æ¤¤¤ë¡£
.\"O .SH NOTES
.SH Ãí°Õ
.\"O .BR flock ()
.\"O does not lock files over NFS.
.\"O Use
.\"O .BR fcntl (2)
.\"O instead: that does work over NFS, given a sufficiently recent version of
.\"O Linux and a server which supports locking.
.BR flock ()
¤Ï NFS ¾å¤Î¥Õ¥¡¥¤¥ë¤Î¥í¥Ã¥¯¤ò¤·¤Ê¤¤¡£Âå¤ï¤ê¤Ë
.BR fcntl (2)
¤ò»ÈÍѤ¹¤ë¤³¤È¡£¤³¤ì¤Ë¤è¤ê¡¢½½Ê¬¤Ë¿·¤·¤¤¥Ð¡¼¥¸¥ç¥ó¤Î Linux ¤È¡¢¥í¥Ã¥¯µ¡Ç½¤ò
¥µ¥Ý¡¼¥È¤·¤¿ NFS ¥µ¡¼¥Ð¤ò»ÈÍѤ¹¤ë¤³¤È¤Ë¤è¤ê¡¢NFS ¾å¤Ç¥í¥Ã¥¯¤¬¤Ç¤­¤ë¡£
.PP
.\"O Since kernel 2.0,
.\"O .BR flock ()
.\"O is implemented as a system call in its own right rather
.\"O than being emulated in the GNU C library as a call to
.\"O .BR fcntl (2).
kernel 2.0 °Ê¹ß¤Ç¤Ï¡¢
.BR flock ()
¤Ï¡¢GNU C ¥é¥¤¥Ö¥é¥ê¤Ç¤Î
.BR fcntl (2)
¤ò¸Æ¤Ó½Ð¤·¤Æ¤Î¥¨¥ß¥å¥ì¡¼¥·¥ç¥ó¤Ç¤Ï¤Ê¤¯¡¢
¤½¤ì¼«ÂΤ¬¥·¥¹¥Æ¥à¥³¡¼¥ë¤È¤·¤Æ¼ÂÁõ¤µ¤ì¤Æ¤¤¤ë¡£
.\"O This yields true BSD semantics:
.\"O there is no interaction between the types of lock
.\"O placed by
.\"O .BR flock ()
.\"O and
.\"O .BR fcntl (2),
.\"O and
.\"O .BR flock ()
.\"O does not detect deadlock.
¤³¤ì¤Ë¤è¤êÀµ¿¿ÀµÌäΠBSD ¤Ç¤ÎÆ°ºî¤¬Ã£À®¤µ¤ì¤ë:
.BR flock ()
¤È
.BR fcntl (2)
¤ÇŬÍѤµ¤ì¤ë¥í¥Ã¥¯¤Î¼ïÊ̤ˤÏÁê¸ßºîÍѤ¬¤Ê¤¯¤Ê¤ê¡¢
.BR flock ()
¤¬¥Ç¥Ã¥É¥í¥Ã¥¯¤ò¸¡½Ð¤·¤Ê¤¯¤Ê¤ë¡£
.PP
.\"O .BR flock ()
.\"O places advisory locks only; given suitable permissions on a file,
.\"O a process is free to ignore the use of
.\"O .BR flock ()
.\"O and perform I/O on the file.
.BR flock ()
¥¢¥É¥Ð¥¤¥¶¥ê¡¦¥í¥Ã¥¯¤À¤±¤òŬÍѤ¹¤ë¡£¤·¤¿¤¬¤Ã¤Æ¡¢¥Õ¥¡¥¤¥ë¤ËŬÀڤʥ¢¥¯¥»¥¹¸¢¤ò
ÉÕÍ¿¤·¤Æ¤¤¤ì¤Ð¡¢¥×¥í¥»¥¹¤Ï
.BR flock ()
¤Î»ÈÍѤË̵»ë¤·¤Æ¡¢¥Õ¥¡¥¤¥ë¤Ø¤ÎÆþ½ÐÎϤò¹Ô¤¦¤³¤È¤¬¤Ç¤­¤ë¡£
.PP
.\"O .BR flock ()
.\"O and
.\"O .BR fcntl (2)
.\"O locks have different semantics with respect to forked processes and
.\"O .BR dup (2).
.BR flock ()
¤È
.BR fcntl (2)
¤Ï fork ¤µ¤ì¤¿¥×¥í¥»¥¹¤È
.BR dup (2)
¤Ç°ã¤Ã¤¿Æ°ºî¤ò¤¹¤ë¡£
.\"O On systems that implement
.\"O .BR flock ()
.\"O using
.\"O .BR fcntl (2),
.\"O the semantics of
.\"O .BR flock ()
.\"O will be different from those described in this manual page.
.BR flock ()
¤ò
.BR fcntl (2)
¤ò»È¤Ã¤Æ¼ÂÁõ¤·¤Æ¤¤¤ë¥·¥¹¥Æ¥à¤Ç¤Ï¡¢
.BR flock ()
¤ÎÆ°ºî¤Ï¤³¤Î¥Þ¥Ë¥å¥¢¥ë¡¦¥Ú¡¼¥¸¤Ëµ­ºÜ¤µ¤ì¤Æ¤¤¤ë¤â¤Î¤È¤Ï°ã¤¦¤À¤í¤¦¡£
.PP
.\"O Converting a lock
.\"O (shared to exclusive, or vice versa) is not guaranteed to be atomic:
.\"O the existing lock is first removed, and then a new lock is established.
.\"O Between these two steps,
.\"O a pending lock request by another process may be granted,
.\"O with the result that the conversion either blocks, or fails if
.\"O .B LOCK_NB
.\"O was specified.
.\"O (This is the original BSD behavior,
.\"O and occurs on many other implementations.)
.\"O .\" Kernel 2.5.21 changed things a little: during lock conversion
.\"O .\" it is now the highest priority process that will get the lock -- mtk
¥í¥Ã¥¯¤ÎÊÑ´¹ (¶¦Í­¥í¥Ã¥¯¤«¤éÇÓ¾¥í¥Ã¥¯¤Ø¡¢¤â¤·¤¯¤Ï¤½¤ÎÈ¿ÂÐ) ¤¬¥¢¥È¥ß¥Ã¥¯¤Ë
¹Ô¤ï¤ì¤ë¤³¤È¤ÏÊݾڤµ¤ì¤Æ¤¤¤Ê¤¤: ´û¸¤Î¥í¥Ã¥¯¤¬¤Þ¤ººï½ü¤µ¤ì¡¢¤½¤ì¤«¤é¿·¤·¤¤
¥í¥Ã¥¯¤¬ÀßÄꤵ¤ì¤ë¡£¤³¤Î 2¤Ä¤Î¥¹¥Æ¥Ã¥×¤Î´Ö¤Ë¡¢Â¾¤Î¥×¥í¥»¥¹¤«¤é¤Î½èÍýÂÔ¤Á¤Î
¥í¥Ã¥¯Í׵᤬ǧ¤á¤é¤ì¤ë¤«¤â¤·¤ì¤º¡¢·ë²Ì¤È¤·¤ÆÊÑ´¹¤ÏÄä»ß (block) ¤·¤¿¤ê¡¢
.RB ( LOCK_NB
¤¬»ØÄꤵ¤ì¤¿¾ì¹ç¤Ë¤Ï) ¼ºÇÔ¤·¤¿¤ê¤¹¤ë¡£
(¤³¤ì¤Ï¸µ¡¹¤Î BSD ¤ÎÆ°ºî¤Ç¤¢¤ê¡¢Â¿¤¯¤Î¾¤Î¼ÂÁõ¤Ç¤âµ¯¤³¤ë¡£)
.\" ¥«¡¼¥Í¥ë 2.5.21 ¤Ç¾¯¤·Æ°ºî¤¬Êѹ¹¤µ¤ì¤¿: ¥í¥Ã¥¯ÊÑ´¹¤ÎºÇÃæ¤Ï
.\" ¤½¤Î¥í¥Ã¥¯¤ò¹Ô¤ª¤¦¤È¤·¤Æ¤¤¤ë¥×¥í¥»¥¹¤¬ºÇ¹âÍ¥Àè¤È¤Ê¤ë -- mtk
.\"O .SH "SEE ALSO"
.SH ´ØÏ¢¹àÌÜ
.BR close (2),
.BR dup (2),
.BR execve (2),
.BR fcntl (2),
.BR fork (2),
.BR open (2),
.BR lockf (3)

.\"O See also
.\"O .I Documentation/filesystem/locks.txt
.\"O in the kernel source
.\"O .RI ( Documentation/locks.txt
.\"O in older kernels).
¥«¡¼¥Í¥ë¥½¡¼¥¹Æâ¤Î
.I Documentation/filesystem/locks.txt
(°ÊÁ°¤Î¥«¡¼¥Í¥ë¤Ç¤Ï
.IR Documentation/locks.txt )
¤â»²¾È¤Î¤³¤È¡£