'\" t
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.\" Copyright (C) 2006 Michael Kerrisk <mtk.manpages@gmail.com>
.\"
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.\" manual provided the copyright notice and this permission notice are
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.\" Japanese Version Copyright (c) 2006 Yuichi SATO
.\"         all rights reserved.
.\" Translated 2006-07-05 by Yuichi SATO <ysato444@yahoo.co.jp>, LDP v2.29
.\" Updated 2006-07-20 by Yuichi SATO, LDP v2.36
.\" Updated 2007-06-13, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v2.55
.\"
.TH INOTIFY 7 2007-06-03 "Linux" "Linux Programmer's Manual"
.SH ̾
inotify \- ե륷ƥ।٥Ȥƻ뤹
.SH 
.I inotify
API ϥե륷ƥ।٥Ȥƻ뤹뤿ε󶡤롣
inotify ϸġΥեǥ쥯ȥƻ뤹Τ˻Ȥ롣
ǥ쥯ȥƻ뤹硢inotify ϥǥ쥯ȥ꼫Ȥ
ǥ쥯ȥΥեΥ٥Ȥ֤

ʲΥƥॳ뤬 API ȶ˻Ѥ롣
.BR inotify_init (2),
.BR inotify_add_watch (2),
.BR inotify_rm_watch (2),
.BR read (2),
.BR close (2).

.BR inotify_init (2)
 inotify 󥹥󥹤inotify 󥹥󥹤򻲾Ȥ
եǥץ֤

.BR inotify_add_watch (2)
 inotify 󥹥󥹤˴ϢŤ줿ִƻо (watch) ꥹȡפ롣
ƻоݥꥹȤγƥƥ ("watch") ϡ
եޤϥǥ쥯ȥΥѥ̾ȡ
Υѥ̾ǻȤեФ
ͥ뤬ƻ뤹ʣΥ٥Ȥνꤹ롣
.BR inotify_add_watch (2)
Ͽƻ륢ƥκ¸δƻоݤѹǤ롣
ƴƻоݤϰդΡִƻоݥǥץפġ
ϴƻоݤȤ
.BR inotify_add_watch (2)
֤Ǥ롣

.BR inotify_rm_watch (2)
 inotify δƻоݥꥹȤ饢ƥ롣

inotify 󥹥󥹤ؤƤ
ƤΥեǥץ줿硢
βؤˤ륪֥ȤȤΥ꥽ϡ
ͥǺѤ뤿˲롣
Ϣڤ줿ƻоݤϼưŪ˲롣

ɤΤ褦ʥ٥ȤäƤΤˤϡ
ץꥱ inotify եǥץ
.BR read (2)
Ф褤
ޤǤ˲⥤٥ȤäƤʤ硢
 (blocking) ⡼ɤΥեǥץǤС
ʤȤ 1 ĤΥ٥Ȥޤ
.BR read (2)
ߤ롣

.BR read (2)
ȡʲι¤Τ 1 İʾޤХåե֤:
.in +4n
.nf

struct inotify_event {
    int      wd;       /* ƻоݥǥץ */
    uint32_t mask;     /* ٥ȤΥޥ */
    uint32_t cookie;   /* Ϣ륤٥ȷϢŤ
                          դʥå (rename(2) ) */
    uint32_t len;      /* 'name' եɤΥ */
    char     name[];   /* NULL ǽü줿Ǥդ̾ */
};
.fi
.in

.I wd
ϥ٥ȯδƻоݤꤹ롣
ϡäƹԤ줿
.BR inotify_add_watch (2)
ƤӽФ֤줿ƻоݥǥץΤ 1 ĤǤ롣

.I mask
ˤȯ٥ () 򵭽Ҥ뤿ΥӥåȤޤޤ롣

.I cookie
ϴϢ륤٥ȤϢŤ뤿ΰդǤ롣
ߤΤȤͤ rename ٥ȤФƤΤ߻ȤƤꡢ
̤ΥڥǤ
.B IN_MOVE_FROM

.B IN_MOVE_TO
٥Ȥ򥢥ץꥱǴϢŤ뤳ȤǤ롣

.I name
եɤϴƻ뤷Ƥǥ쥯ȥΥեФ
٥Ȥ֤Τˤ¸ߤ롣
ƻ뤹ǥ쥯ȥ꤫ΥեХѥ̾ɽ
Υѥ̾ NULL ǽü졢
θɤ߹ߤŬڤʥɥ쥹Ĵ뤿ˡ
 NULL ХȤޤޤ⤢롣

.I len
եɤ NULL ХȤޤ
.I name
ƤΥХȿɽ
äơ
.I inotify_event
¤ΤΥ
.I "sizeof(inotify_event)+len"
Ǥ롣

.BR read (2)
Ϥ줿ХåեƼΥ٥Ȥ˴ؤ֤ʤ
ưϥͥΥСˤۤʤ롣
2.6.21 ΥͥǤϡ
.BR read (2)
 0 ֤
2.6.21 ʹߤΥͥǤϡ
.BR read (2)
ϥ顼
.B EINVAL
ǼԤ롣
.SS inotify ٥
.BR inotify_add_watch (2)

.I mask
ȡinotify ե빽¤Τ
.BR read (2)
Ȥ֤
.I inotify_event
¤Τ
.I mask
եɤϡȤ inotify ٥Ȥ̤뤿
ӥåȥޥǤ롣
ʲΥӥåȤ
.BR inotify_add_watch (2)
Ƥ֤Ȥ
.I mask
˻ǽǤꡢ
.BR read (2)
֤
.I mask
եɤ֤:
.RS 4
.sp
.PD 0
.TP 18
.B IN_ACCESS
ե뤬 (read) 줿(*)
.TP
.B IN_ATTRIB
᥿ǡѹ줿 (ġॹסĥ°ʤ)(*)
.TP
.B IN_CLOSE_WRITE
񤭹ߤΤ˥ץ󤵤줿ե뤬줿(*)
.TP
.B IN_CLOSE_NOWRITE
񤭹߰ʳΤ˥ץ󤵤줿ե뤬줿(*)
.TP
.B IN_CREATE
ƻоݥǥ쥯ȥǥեǥ쥯ȥ꤬줿(*)
.TP
.B IN_DELETE
ƻоݥǥ쥯ȥǥեǥ쥯ȥ꤬줿(*)
.TP
.B IN_DELETE_SELF
ƻоݤΥǥ쥯ȥޤϥե뼫Ȥ줿
.TP
.B IN_MODIFY
ե뤬줿(*)
.TP
.B IN_MOVE_SELF
ƻоݤΥǥ쥯ȥޤϥե뼫Ȥư줿
.TP
.B IN_MOVED_FROM
ե뤬ƻоݥǥ쥯ȥ곰ذư줿(*)
.TP
.B IN_MOVED_TO
ե뤬ƻоݥǥ쥯ȥذư줿(*)
.TP
.B IN_OPEN
ե뤬ץ󤵤줿(*)
.PD
.RE
.PP
ǥ쥯ȥƻ뤹硢
嵭ǥꥹ (*) դ٥Ȥϡ
Υǥ쥯ȥΥեФȯ롣
ΤȤ
.I inotify_event
¤Τ֤
.I name
եɤϡǥ쥯ȥΥե̾ɽ
.PP
.B IN_ALL_EVENTS
ޥϾ嵭Υ٥ƤΥޥȤ롣
Υޥ
.BR inotify_add_watch (2)
ƤӽФȤ
.I mask
ȤƻȤ롣

 2 Ĥʥޥ롣
.B IN_MOVE

IN_MOVED_FROM|IN_MOVED_TO

.B IN_CLOSE

IN_CLOSE_WRITE|IN_CLOSE_NOWRITE

.PP
¾ˤʲΥӥåȤ
.BR inotify_add_watch (2)
Ƥ֤Ȥ
.I mask
˻Ǥ:
.RS 4
.sp
.PD 0
.TP 18
.B IN_DONT_FOLLOW
\fIpathname\fP ܥå󥯤Ǥéʤ
(Linux 2.6.15 ʹ)
.TP
.B IN_MASK_ADD
\fIpathname\fP Фƻޥ¸ߤ硢
(ޥ֤ǤϤʤ) ٥Ȥɲ (OR) 롣
.TP
.B IN_ONESHOT
1 ĤΥ٥ȤˤĤ \fIpathname\fP ƻ뤷
٥ȤȯƻоݥꥹȤ롣
.TP
.B IN_ONLYDIR
\fIpathname\fP ǥ쥯ȥξˤΤߴƻ뤹롣
(Linux 2.6.15 ʹ)
.PD
.RE
.PP
ʲΥӥåȤ
.BR read (2)
֤
.I mask
եɤꤵ:
.RS 4
.sp
.PD 0
.TP 18
.B IN_IGNORED
ƻоݤ (\fBinotify_rm_watch\fP(2) ˤ) Ū
줿⤷ (եκޤϥե
ƥΥޥȤˤ) ưŪ˺줿
.TP
.B IN_ISDIR
Υ٥Ȥоݤǥ쥯ȥǤ롣
.TP
.B IN_Q_OVERFLOW
٥ȥ塼줿 (Υ٥Ȥξ硢\fIwd\fP  \-1 Ǥ)
.TP
.B IN_UNMOUNT
ƻоݥ֥Ȥޤե륷ƥबޥȤ줿
.PD
.RE
.SS /proc 󥿡ե
ʲΥ󥿡եϡinotify Ǿ񤵤
̤ͥ¤Τ˻ѤǤ:
.TP
.I /proc/sys/fs/inotify/max_queued_events
Υեͤϡץꥱ
.BR inotify_init (2)
ƤӽФȤ˻Ѥ졢б inotify 󥹥󥹤ˤĤ
塼륤٥Ȥοξ¤ꤹ롣
¤Ķ٥Ȥ˴뤬
.B IN_Q_OVERFLOW
٥Ȥ롣
.TP
.I /proc/sys/fs/inotify/max_user_instances
1 Ĥμ¥桼 ID ФǤ
inotify 󥹥󥹤οξ¤ꤹ롣
.TP
.I /proc/sys/fs/inotify/max_user_watches
 inotify 󥹥󥹤˴ϢŤƻоݤο¤ꤹ롣
.SH С
inotify  2.6.13  Linux ͥȹޤ줿
ɬפʥ饤֥Υ󥿡եϡ
glibc ΥС 2.4 ɲä줿
.RB ( IN_DONT_FOLLOW ,
.BR IN_MASK_ADD ,
.B IN_ONLYDIR
ϥС 2.5 ɲä줿)
.SH 
inotify API  Linux ȼΤΤǤ롣
.SH 
inotify եǥץ
.BR select (2),
.BR poll (2),
.BR epoll (7)
ȤäƴƻǤ롣

inotify եǥץФ
Ϣ³ inotify ٥ȤƱξ
.RI ( wd ,
.IR mask ,
.IR cookie ,
.I name
)Ϣ³륤٥Ȥ 1 ĤΥ٥ȤˤޤȤ롣

inotify եǥץɤ߹ߤ֤륤٥Ȥϡ
դ줿塼ˤʤ롣
äơȤСǥ쥯ȥ̤̾̾ѹ硢
inotify եǥץˤĤƤ֤
٥Ȥ뤳Ȥݾڤ롣

.B FIONREAD
.BR ioctl (2)
 inotify եǥץ鲿Хɤ߹뤫֤

inotify ˤǥ쥯ȥδƻϺƵŪ˹Ԥʤ:
ǥ쥯ȥʲΥ֥ǥ쥯ȥƻ뤹硢
ƻоݤɲäǺʤФʤʤ
.SH Х
2.6.16 ΥͥǤ
.B IN_ONESHOT
.I mask
ե饰Ưʤ
.SH Ϣ
.BR inotify_add_watch (2),
.BR inotify_init (2),
.BR inotify_rm_watch (2),
.BR read (2),
.BR stat (2),
.IR Documentation/filesystems/inotify.txt .