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AUTOMOUNT(8) AUTOMOUNT(8)
NAME
automount - configure mount points for autofs
SYNOPSIS
automount [options] mount-point map-type[,format] map [map-options]
DESCRIPTION
The automount program is used to configure a mount point for autofs,
the inlined Linux automounter. automount works by taking a base mount-
point and map file, and using these (combined with other options) to
automatically mount filesystems within the base mount-point when they
are accessed in any way. The filesystems are then autounmounted after
a period of inactivity.
OPTIONS
-p, --pid-file
Write the pid of the daemon to the specified file.
-t, --timeout
Set the minimum timeout, in seconds, until directories are
unmounted. The default is 5 minutes. Setting the timeout to
zero disables unmounts completely.
-v, --verbose
Enables printing of general status and progress messages.
-d, --debug
Enables printing of general status and progress messages as well
as debuging messages.
-g, --ghost
Request that directories in the automount be shown but not
mounted until accesssed. The wildcard map is not ghosted.
-V, --version
Display the version number, then exit.
ARGUMENTS
automount takes at least three arguments. Mandatory arguments include
mount-point, map-type, and map. Both mandatory and optional arguments
are described below.
mount-point
Base location for autofs-mounted filesystems to be attached.
This is a directory name that will be created (as with mkdir -p)
and later when automount terminates will be removed (as with
rmdir -p).
map-type
Type of map used for this invocation of automount. The follow-
ing are valid map types:
file The map is a regular text file.
program
The map is an executable program, which is passed a key
on the command line and returns an entry on stdout if
successful.
yp The map is a NIS (YP) database.
nisplus
The map is a NIS+ database.
hesiod The map is a hesiod database whose filsys entries are
used for maps.
ldap map names are of the form [//servername/]basedn, where
the optional servername is the name of the LDAP server to
query, and basedn is the DN to do a subtree search under.
Two LDAP schema are supported. The automountMap and the
nisMap (RFC 2307) object classes.
Entries in the automountMap schema are automount objects in the
specified subtree, where the cn attribute is the key (the wild-
card key is "/"), and the automountInformation attribute con-
tains the information used by the automounter. Documentation on
the schema used by this module is available online at
http://docs.sun.com/source/806-4251-10/mapping.htm.
RFC 2307 schema entries are nisObject objects and use the cn
attribute as the key and the nisMapEntry contains information
used by the automounter.
format Format of the map data; currently the only formats recognized
are sun, which is a subset of the Sun automounter map format,
and hesiod, for hesiod filesys entries. If the format is left
unspecified, it defaults to sun for all map types except hesiod.
map Location of mapfile to use. This is an absolute UNIX pathname
in the case for maps of types file or program, and the name of a
database in the case for maps of type yp, nisplus, or hesiod.
options
Any remaining command line arguments without leading dashes (-)
are taken as options (-o) to mount. Arguments with leading
dashes are considered options for the maps.
The sun format supports the following options:
-Dvariable=value
Replace variable with value in map substitutions.
-strict
Treat errors when mounting file systems as fatal. This is
important when multiple file systems should be mounted
(`multimounts'). If this option is given, no file system
is mounted at all if at least one file system can't be
mounted.
NOTES
If the automount daemon catches signal USR1, it will unmount all cur-
rently unused autofs-mounted filesystems and continue running (forced
expire). If it catches signals TERM or USR2 it will unmount all unused
autofs-mounted filesystems and exit if all filesystems were unmounted.
Busy filesystems will not be unmounted. The daemon also responds to a
HUP signal which triggers an update of maps for which ghosting is
implemented (currently FILE and NIS maps).
If the autofs directory itself is busy when the daemon is signalled
with an exit signal then the daemon will exit without unmounting the
autofs filesystem. The filesystem is left in a catatonic (non-func-
tional) state, and can be unmounted when it becomes unused.
SEE ALSO
autofs(5), mount(8).
BUGS
A whole slew of missing desirable features (see TODO file).
The documentation leaves a lot to be desired.
Please report other bugs along with a detailed description to <aut-
ofs@linux.kernel.org>. For instructions on how to join the list and for
archives visit http://linux.kernel.org/mailman/listinfo/autofs
AUTHOR
H. Peter Anvin <hpa@transmeta.com>
14 Jan 2000 AUTOMOUNT(8)
Man(1) output converted with
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This page was generated on Sat Sep 8 16:40:26 GMT 2007
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