.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (C) 1993 Rickard E. Faith <faith@cs.unc.edu>
.\" and Copyright (C) 1994 Andries E. Brouwer <aeb@cwi.nl>
.\" and Copyright (C) 2002, 2005 Michael Kerrisk <mtk.manpages@gmail.com>
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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 1996-11-04 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified 2001-10-13 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"	Added note on historical behavior of MS_NOSUID
.\" Modified 2002-05-16 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"	Extensive changes and additions
.\" Modified 2002-05-27 by aeb
.\" Modified 2002-06-11 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"	Enhanced descriptions of MS_MOVE, MS_BIND, and MS_REMOUNT
.\" Modified 2004-06-17 by Michael Kerrisk <mtk.manpages@gmail.com>
.\" 2005-05-18, mtk, Added MNT_EXPIRE, plus a few other tidy-ups.
.\"
.\" Japanese Version Copyright (c) 1997 SUTO, Mitsuaki
.\"         all rights reserved.
.\" Translated 1997-06-26,SUTO, Mitsuaki <suto@av.crl.sony.co.jp>
.\" Updated 2001-05-20, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2001-06-25, Kentaro Shirakata
.\" Updated 2001-10-15, Kentaro Shirakata
.\" Updated 2002-01-01, Kentaro Shirakata
.\" Updated 2002-11-24, Kentaro Shirakata
.\" Updated 2003-01-27, Kentaro Shirakata
.\" Updated 2005-02-28, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2005-09-06, Akihiro MOTOKI
.\" Updated 2006-07-23, Akihiro MOTOKI, LDP v2.36
.\" Updated 2007-01-07, Akihiro MOTOKI, LDP v2.43
.\" Updated 2007-05-01, Akihiro MOTOKI, LDP v2.46
.\"
.\"WORD:	lazy umount		ٱ䥢ޥ
.\"WORD:	Linux-specific		Linux ͭ
.\"
.\" motoki 2005-02-28:
.\" - subtree ɤʬڡʬĥ꡼֥ĥ꡼ʤ
.\"
.TH MOUNT 2 2007-12-17 "Linux" "Linux Programmer's Manual"
.SH ̾
mount, umount, umount2 \- ե륷ƥޥ/ޥȤ
.SH 
.nf
.B "#include <sys/mount.h>"
.sp
.BI "int mount(const char *" source ", const char *" target ,
.BI "          const char *" filesystemtype ", unsigned long " mountflags ,
.BI "          const void *" data );
.sp
.BI "int umount(const char *" target );
.sp
.fi
.BI "int umount2(const char *" target ", int " flags );
.SH 
.BR mount ()

.I source
ǻꤵ줿ե륷ƥ (ǥХ̾Ǥ뤳Ȥ¿
ǥ쥯ȥ̾ߡξ⤢) 
.I target
ǻꤵ줿ǥ쥯ȥ˷ӤĤ롣

.BR umount ()

.BR umount2 ()

.I target
˥ޥȤƤ (Ǿ̤) ե륷ƥ򳰤

ե륷ƥΥޥ/ޥȤԤˤϡ
Ŭڤʸ (Linux Ǥ
.B CAP_SYS_ADMIN
ѥӥƥ) ɬפǤ롣

Linux 2.4 ʹߡҤȤĤΥե륷ƥʣΥޥȥݥȤ
ӤĤ뤳ȤǤƱޥȥݥȤʣΥޥȤ򥹥å
뤳ȤǤ롣
.\" Multiple mounts on same mount point: since 2.3.99pre7.


.I filesystemtype
Ȥƥͥ뤬бƤͤϡ
.I /proc/filesystems
ǻȤǤ (㤨 "minix",
"ext2", "msdos", "proc", "nfs", "iso9660" )
Ŭڤʥ⥸塼뤬ɤ߹ޤȡ̤ͤѲǽˤʤ뤫⤷ʤ


.I mountflags
ϡƬ 16 ӥåȤϥޥåʥС 0xC0ED (\fBMS_MGC_VAL\fP) ǡ
Ĥ 16 ӥåȤޥȥե饰Ǥ롣
ޥåʥСϡͥС 2.4 ǤɬܤǤä
ߤɬפʤꤵƤ̵뤵롣
ޥȥե饰 libc4  libc5 Ǥ \fI<linux/fs.h>\fP 
glibc2 Ǥ \fI<sys/mount.h>\fP Ƥꡢʲ̤Ǥ:
.\" FIXME 2.6.15 added flags for "shared sub-tree" functionality:
.\" MS_UNBINDABLE, MS_PRIVATE, MS_SHARED, MS_SLAVE
.\" These need to be documented on this page.
.\" See Documentation/sharedsubtree.txt
.TP
.BR MS_BIND " (Linux 2.4 ʹ)"
.\" Τˤ 2.4.0-test9 ʹ
ХɥޥȤԤϥեǥ쥯ȥʬڤ
ե륷ƥ̤ξǸ褦ˤΤǤ롣
ХɥޥȤȤȡե륷ƥޤ
.BR chroot (2)
jail 뤳Ȥǽˤʤ롣
.IR filesystemtype ", " mountflags ", " data
̵뤵롣
.\" with the exception of the "hidden" MS_REC mountflags bit
.TP
.BR MS_DIRSYNC " (Linux 2.5.19 ʹ)"
Υե륷ƥؤΥǥ쥯ȥѹƱŪ˹Ԥ
(ϸġΥǥ쥯ȥꡢޤ
.BR chattr (1)
ȤäʬǤ롣)
.TP
.B MS_MANDLOCK
Υե륷ƥΥեФƶåǧ롣
(åͭˤˤϡ
.BR fcntl (2)
ǽҤ٤Ƥˡǥեñ̤ǵĤ򤷤ʤФʤʤ)
.\" FIXME Say more about MS_MOVE
.TP
.B MS_MOVE
ʬڤư롣
.I source
ˤϤǤ¸ߤޥȥݥȤꤷ
.I target
ˤϿꤹ롣
ưϥȥߥåǤ롣
μ¹桢ʬĥ꡼ޥȤ뤳ȤϤʤ
.IR filesystemtype ", " mountflags ", " data
̵뤵롣
.TP
.B MS_NOATIME
Υե륷ƥ (Ƥμ) եΥ򹹿ʤ
.TP
.B MS_NODEV
Υե륷ƥΥǥХ (ڥե) ؤΥĤʤ
.TP
.B MS_NODIRATIME
Υե륷ƥΥǥ쥯ȥΥ򹹿ʤ
Υե饰
.B MS_NOATIME
󶡤뵡ǽΥ֥åȤ󶡤롣Ĥޤꡢ
.B MS_NOATIME
Ǥ
.B MS_NODIRATIME
ۤΤꤵ롣
.TP
.B MS_NOEXEC
Υե륷ƥˤץμ¹ԤĤʤ
.\" (Possibly useful for a file system that contains non-Linux executables.
.\" Often used as a security feature, e.g., to make sure that restricted
.\" users cannot execute files uploaded using ftp or so.)
.TP
.B MS_NOSUID
Υե륷ƥΥץ¹ԤȤˡ
set-user-ID ӥåȤ set-group-ID ӥåȤ̵뤹롣
.\" (This is a security feature to prevent users executing set-UID and
.\" set-GID programs from removable disk devices.)
.TP
.B MS_RDONLY
ե륷ƥɤ߹ѤǥޥȤ롣
.\"
.\" FIXME Document MS_REC, available since 2.4.11.
.\" This flag has meaning in conjunction with MS_BIND and
.\" also with the shared sub-tree flags.
.TP
.BR MS_RELATIME " (Linux 2.6.20 ʹ)"
Υե륷ƥΥե뤬줿ݡ
Υեκǽ (atime) θͤ
ǽ (mtime) ǽѹ (ctime) 
ˤΤߡatime 򹹿롣
Υץϡ
.BR mutt (1)
Τ褦ˡǸƽʹߤ˥ե뤬ɤ߽Ф줿Τ
ɬפץͭѤǤ롣
.TP
.B MS_REMOUNT
Ǥ¸ߤޥȤƥޥȤ롣
ˤꡢǤ¸ߤޥȤ
.I mountflags

.I data
򡢰٥ޥȤƤƥޥȤȤȤ򤻤
ѹǤ롣
.I source

.I target
Ϻǽ
.BR mount ()
ƤӽФƱͤꤹɬפ롣
.I filesystemtype
̵뤵롣

.I mountflags
Τ
.BR MS_RDONLY ,
.BR MS_SYNCHRONOUS ,
.B MS_MANDLOCK
ѹǽǤ롣
ͥ 2.6.16 Ǥϡ
.BR MS_NOATIME ,
.B MS_NODIRATIME
ѹǽǤä
ͥ 2.4 Ǥϡ嵭˲äơ
.BR MS_NOSUID ,
.BR MS_NODEV ,
.B MS_NOEXEC
ѹǽǤä
.TP
.B MS_SYNCHRONOUS
ե륷ƥФƱŪ˽񤭹ߤԤ
(Υե륷ƥƤΥץ󤵤줿եФơ
.BR open (2)
Υե饰
.B O_SYNC
ꤷ褦ưȤʤ)
.PP
Linux 2.4 ʹߤǤϡ
.BR MS_NODEV ", " MS_NOEXEC ", " MS_NOSUID
ϥޥȥݥñ̤ǻǤ롣
ͥ 2.6.16 ʹߤǤϡ
.B MS_NOATIME

.B MS_NODIRATIME
ޥȥݥñ̤ǻǤ롣
ޤ
.B MS_RELATIME
ե饰ޥȥݥñ̤Ǥ롣
.PP

.I data
ɤΤ褦˲ᤵ뤫ϡե륷ƥˤäưۤʤ롣
Ƥϡꤵ줿ե륷ƥѲǽʥץ
޶ڤ¤٤줿ʸǤ롣
ƥե륷ƥФƻǽʥץξܺ٤ˤĤƤ
.BR mount (8)
򻲾ȤΤȡ
.PP
.\" Note: the kernel naming differs from the glibc naming
.\" umount2 is the glibc name for what the kernel now calls umount
.\" and umount is the glibc name for oldumount
Linux 2.1.116 顢
.BR umount2 ()
ƥॳ뤬ɲä줿
.BR umount ()
Ʊͤ
.I target 򥢥ޥȤ뤬
.I flags
ɲäƤꡢκݤο񤤤Ǥ롣
.TP
.BR MNT_FORCE " (2.1.116 ʹ)"
 (busy) Ǥ⶯Ū˥ޥȤ¹Ԥ롣
Ԥȥǡ򼺤ǽ롣
(NFS ޥ)
.\" FIXME Can MNT_FORCE result in data loss?  According to
.\" the Solaris manual page it can cause data loss on Solaris.
.\" If the same holds on Linux, then this should be documented.
.TP
.BR MNT_DETACH " (2.4.11 ʹ)"
ٱ䥢ޥȤԤޥȥݥȤФ뿷Υ
ԲǽȤʤꡢºݤΥޥȤϥޥȥݥȤӥ
ʤʤäǹԤ
.TP
.BR MNT_EXPIRE " (Linux 2.6.8 ʹ)"
ޥȥݥȤ˴ڤΰĤ롣
ޥȥݥȤ߻Ǥʤ硢Υե饰Ĥ
.BR umount2 ()
ƸƤӽФ
.B EAGAIN
顼ǼԤ뤬ޥȥݥȤˤϴڤ (expire)
ΰĤ롣
ΥޥȥݥȤϤ줫Υץʤ¤
ڤΰĤޤޤȤʤ롣
⤦
.B MNT_EXPIRE
Ĥ
.BR umount2 ()
ƤӽФȡڤΰΤĤޥȥݥȤ
ޥȤ롣
Υե饰
.B MNT_FORCE
⤷
.B MNT_DETACH
Ʊ˻ꤹ뤳ȤϤǤʤ
.SH ֤
 0 ֤롣Ԥ \-1 ֤ꡢ
.I errno
顼Ƥ˽äꤵ롣
.SH 顼
ʲ˼顼ϡե륷ƥ˰¸ʤΤǤ롣
줾Υե륷ƥॿפˤϸͭΥ顼¸ߤ礬ꡢ
ȼư򤹤뤳Ȥ⤢롣ܤϥͥΥ򸫤ߤ
.TP
.B EACCES
ѥ˴ޤޤǥ쥯ȥ˸ (¹) Ĥʤ
.RB ( path_resolution (7)
⻲)
ޤϡ
.B MS_RONLY
ե饰ꤻɤ߹ѤΥե륷ƥ
ޥȤ褦Ȥ
ޤϡ֥åǥХ
.I source

.B MS_NODEV
ץǥޥȤ줿ե륷ƥˤ롣
.\" mtk: Probably: write permission is required for MS_BIND, with
.\" the error EPERM if not present; CAP_DAC_OVERRIDE is required.
.TP
.B EAGAIN
.B MNT_EXPIRE
ꤷ
.BR umount2 ()
θƤӽФǡ̤ѤΥե륷ƥ˴ڤΰ
Ĥ뤳ȤǤ
.TP
.B EBUSY
.I source
ϴ˥ޥȤƤ롣
ޤϡ񤭹Ѥ˥ץ󤵤줿ե뤬ꡢ
ɤ߹ѤǺƥޥȤ뤳ȤǤʤ
ޤϡ
.I target
 (busy) Τᡢ
.I target
˥ޥ/ޥȤǤʤ
.I target
ȤƤϡ륿ưƤǥ쥯ȥ (working
directory) ǤȤ̤ΥǥХΥޥȥݥȤǤȤ
ץ󤵤줿ե뤬¸ߤ롢ʤɤ롣
.TP
.B EFAULT
򼨤ΤҤȤĤ桼Υɥ쥹֤γؤƤ롣
.TP
.B EINVAL
.I source
ʥѡ֥å롣
ޤϡ
.I source

.I target
˥ޥȤƤʤΤˡƥޥ
.RB ( MS_REMOUNT )
׵ᤵ줿
ޤϡ
.I source
ޥȥݥȤǤϤʤ'/' ʤΤˡư
.RB ( MS_MOVE )
׵ᤵ줿
ޤϡ
.I target
ޥȥݥȤǤϤʤΤ˥ޥȤ׵ᤵ줿
ޤϡ
.B MNT_EXPIRE
ꤷ
.BR umount2 ()
Ф
.B MNT_DETACH

.B MNT_FORCE
Ʊ˻ꤵ줿
.TP
.B ELOOP
ѥ̾βо줷󥯤¿
ޤϡ
.I target

.I source
λ¹ʤΤ˰ư׵ᤵ줿
.TP
.B EMFILE
.\" motoki: ɤΤ
(֥åǥХɬפǤʤ)
ߡǥХΥơ֥뤬դˤʤä
.TP
.B ENAMETOOLONG
ѥ̾Ĺ
.B MAXPATHLEN
ۤ
.TP
.B ENODEV
.I filesystemtype
ͥ (config) Ƥʤ
.TP
.B ENOENT
ѥ̾Ǥ롣⤷ϻꤵ줿ѥ¸ߤʤ
.TP
.B ENOMEM
ͥ뤬ե̾ǡ򥳥ԡ뤿ζڡݤǤʤ
.TP
.B ENOTBLK
(֥åǥХɬפ)
.I source
֥åǥХǤϤʤ
.TP
.B ENOTDIR
2 ܤΰ⤷ 1 ܤΰƬǥ쥯ȥǤϤʤ
.TP
.B ENXIO
֥åǥХ
.I source
Υ᥸㡼ֹ椬ϰϳǤ롣
.TP
.B EPERM
ƤӽФɬפʸ¤ʤ
.SH 
δؿ Linux ͭδؿǤꡢܿθץǤ
Ѥ٤Ǥʤ
.SH 
.SS Linux Ǥ

.BR umount ()
ؿ \fIumount(device)\fP ηǸƤӽФ졢
֥åǥХʳꤷƸƤӽФ
.B ENOTBLK
֤
Linux 0.98p4 ǡ̵̾ǥХ (anonymous device) б뤿
\fIumount(dir)\fP ηǤθƤӽФä줿
Linux 2.3.99-pre7 ǡ\fIumount(device)\fP Ϻ졢
\fIumount(dir)\fP Ĥ줿
(ĤΥǥХʣΰ֤˥ޥȽ褦ˤʤäᡢ
ǥХꤷǤԽʬǤ)
.LP

.B MS_SYNC
ե饰ϡ̤
.B MS_SYNC
 \fI<mman.h>\fP ɲä줿Τ
1.1.69 
.B MS_SYNCHRONOUS
̾Ѥä
.LP
Linux 2.4 ΥСǤϡ
.B MS_NOSUID
ץդǥޥȤ줿ե륷ƥ
set-UID  set-GID Υץ¹Ԥ褦Ȥȡ
.B EPERM
顼Ȥʤä
Linux 2.4 ʹߤǤϡΤ褦ʾ set-UID ӥåȤ set-GID ӥåȤ
̵뤵Ǥ롣
.\" ѹ patch-2.4.0-prerelease ˴ޤޤƤ롣
.SH Ϣ
.BR path_resolution (7),
.BR mount (8),
.BR umount (8)