diff options
Diffstat (limited to 'mount/mount.8')
| -rw-r--r-- | mount/mount.8 | 84 |
1 files changed, 75 insertions, 9 deletions
diff --git a/mount/mount.8 b/mount/mount.8 index 097dee005..633671b19 100644 --- a/mount/mount.8 +++ b/mount/mount.8 @@ -31,6 +31,8 @@ .\" 970114, aeb: xiafs and ext are dead; romfs is new .\" 970623, aeb: -F option .\" 970914, reg: -s option +.\" 981111, K.Garloff: /etc/filesystems +.\" 990111, aeb: documented /sbin/mount.smbfs .\" .TH MOUNT 8 "14 September 1997" "Linux 2.0" "Linux Programmer's Manual" .SH NAME @@ -111,6 +113,8 @@ but there are other possibilities. For example, in the case of an NFS mount, .I device may look like .IR knuth.cwi.nl:/dir . +It is possible to indicate a block special device using its +volume label or UUID (see the \-L and \-U options below). The file .I /etc/fstab @@ -163,6 +167,14 @@ or .RE For more details, see .BR fstab (5). +Only the user that mounted a filesystem can unmount it again. +If any user should be able to unmount, then use +.B users +instead of +.B user +in the +.I fstab +line. The programs .B mount @@ -265,16 +277,46 @@ Mount the file system read-only. A synonym is Mount the file system read/write. This is the default. A synonym is .BR "\-o rw" . .TP +.BI \-L " label" +Mount the partition that has the specified +.IR label . +.TP +.BI \-U " uuid" +Mount the partition that has the specified +.IR uuid . +These two options require the file +.I /proc/partitions +(present since Linux 2.1.116) to exist. +.TP .BI \-t " vfstype" The argument following the .B \-t is used to indicate the file system type. The file system types which are currently supported are listed in .IR linux/fs/filesystems.c : -.IR minix ", " ext ", " ext2 ", " xiafs ", " hpfs , -.IR msdos ", " umsdos ", " vfat , -.IR proc ", " nfs ", " iso9660 ", " smbfs ", " ncpfs , -.IR affs ", " ufs ", " romfs , +.IR minix , +.IR xiafs , +.IR ext , +.IR ext2 , +.IR msdos , +.IR umsdos , +.IR vfat , +.IR proc , +.IR autofs , +.IR devpts , +.IR nfs , +.IR iso9660 , +.IR smbfs , +.IR ncpfs , +.IR adfs , +.IR affs , +.IR coda , +.IR hfs , +.IR hpfs , +.IR ntfs , +.IR qnx4 , +.IR romfs , +.IR ufs , .IR sysv ", " xenix ", " coherent . Note that the last three are equivalent and that .I xenix @@ -288,6 +330,23 @@ and .I xiafs do not exist anymore. +For most types all the +.B mount +program has to do is issue a simple +.IR mount (2) +system call, and no detailed knowledge of the filesystem type is required. +For a few types however (like nfs, smbfs, ncpfs) ad hoc code is +necessary. The nfs ad hoc code is built in, but smbfs and ncpfs +have a separate mount program. In order to make it possible to +treat all types in a uniform way, mount will execute the program +.I /sbin/mount.TYPE +(if that exists) when called with type smb or ncp. +Since various versions of the +.I smbmount +program have different calling conventions, +.I /sbin/mount.smb +may have to be a shell script that sets up the desired call. + The type .I iso9660 is the default. If no @@ -297,9 +356,11 @@ option is given, or if the type is specified, the superblock is probed for the filesystem type .RI ( minix ", " ext ", " ext2 ", " xiafs ", " iso9660 ", " romfs are supported). -If this probe fails and -.I /proc/filesystems -exists, then all of the filesystems listed there will be tried, +If this probe fails, mount will try to read the file +.IR /etc/filesystems , +or, if that does not exist, +.IR /proc/filesystems . +All of the filesystem types listed there will be tried, except for those that are labeled "nodev" (e.g., .I proc and @@ -308,6 +369,10 @@ and Note that the .B auto type may be useful for user-mounted floppies. +Creating a file +.I /etc/filesystems +can be useful to change the probe order (e.g., to try vfat before msdos) +or if you use a kernel module autoloader. Warning: the probing uses a heuristic (the presence of appropriate `magic'), and could recognize the wrong filesystem type. @@ -381,7 +446,8 @@ binaries for architectures other than its own. .TP .B nosuid Do not allow set-user-identifier or set-group-identifier bits to take -effect. +effect. (This seems safe, but is in fact rather unsafe if you have +suidperl(1) installed.) .TP .B nouser Forbid an ordinary (i.e., non-root) user to mount the file system. @@ -1000,4 +1066,4 @@ for the .SH HISTORY A .B mount -command appeared in Version 6 AT&T UNIX. +command existed in Version 5 AT&T UNIX. |