Provided by: libsys-filesystem-perl_1.408-1_all 
NAME
Sys::Filesystem - Retrieve list of filesystems and their properties
SYNOPSIS
use strict;
use Sys::Filesystem ();
# Method 1
my $fs = Sys::Filesystem->new();
my @filesystems = $fs->filesystems();
for (@filesystems)
{
printf("%s is a %s filesystem mounted on %s\n",
$fs->mount_point($_),
$fs->format($_),
$fs->device($_)
);
}
# Method 2
my $weird_fs = Sys::Filesystem->new(
fstab => '/etc/weird/vfstab.conf',
mtab => '/etc/active_mounts',
xtab => '/etc/nfs/mounts'
);
my @weird_filesystems = $weird_fs->filesystems();
# Method 3 (nice but naughty)
my @filesystems = Sys::Filesystem->filesystems();
DESCRIPTION
Sys::Filesystem is intended to be a portable interface to list and query filesystem names
and their properties. At the time of writing there were only Solaris and Win32 modules
available on CPAN to perform this kind of operation. This module hopes to provide a
consistent API to list all, mounted, unmounted and special filesystems on a system, and
query as many properties as possible with common aliases wherever possible.
INHERITANCE
Sys::Filesystem
ISA UNIVERSAL
METHODS
new Creates a new Sys::Filesystem object. "new" accepts following optional key value pairs
to help or force where mount information is gathered from. These values are not
otherwise defaulted by the main Sys::Filesystem object, but left to the platform
specific helper modules to determine as an exercise of common sense.
canondev
Specify whether device path's shall be resolved when they're a symbolic link.
$Sys::Filesystem::CANONDEV is used when no key "canondev" is passed.
fstab
Specify the full path and filename of the filesystem table (or fstab for short).
Not all platforms have such a file and so this option may be ignored on some
systems.
$Sys::Filesystem::FSTAB is used when no key "fstab" is passed.
mtab
Specify the full path and filename of the mounted filesystem table (or mtab for
short). Not all platforms have such a file and so this option may be ignored on
some systems.
$Sys::Filesystem::MTAB is used when no key "mtab" is passed.
xtab
DEPRECIATED Specify the full path and filename of the mounted NFS filesystem table
(or xtab for short). This is usually only pertinent to Unix bases systems. Not
all helper modules will query NFS mounts as a separate exercise, and therefore
this option may be ignored on some systems.
None of the OS plugins use that tunable (anymore?), so now a warning is raised
when it's used. The entire support will be removed not before 2015. Once that
happened, using "xtab" will raise an exception.
aliases
Overrides internal aliasing table used to match queries against OS plugin. This
should be used only when dealing with closed source platform helper module(s).
supported
Returns true if the operating system is supported by Sys::Filesystem. Unsupported
operating systems may get less information, e.g. the mount state couldn't determined
or which file system type is special isn't known.
Listing Filesystems
filesystems()
Returns a list of all filesystem. May accept an optional list of key pair values in
order to filter/restrict the results which are returned. The restrictions are
evaluated to match as much as possible, so asking for regular and special file system
(or mounted and special file systems), you'll get all.
For better understanding, please imagine the parameters like:
@fslist = $fs->filesystems( mounted => 1, special => 1 );
# results similar as
SELECT mountpoint FROM filesystems WHERE mounted = 1 OR special = 1
If you need other selection choices, please take a look at DBD::Sys.
Valid values are as follows:
device => "string"
Returns only filesystems that are mounted using the device of "string". For
example:
my $fdd_filesytem = Sys::Filesystem->filesystems(device => "/dev/fd0");
mounted => 1
Returns only filesystems which can be confirmed as actively mounted. (Filesystems
which are mounted).
The mounted_filesystems() method is an alias for this syntax.
unmounted => 1
Returns only filesystems which cannot be confirmed as actively mounted.
(Filesystems which are not mounted).
The unmounted_filesystems() method is an alias for this syntax.
special => 1
Returns only filesystems which are regarded as special in some way. A filesystem
is marked as special by the operating specific helper module. For example, a tmpfs
type filesystem on one operating system might be regarded as a special filesystem,
but not on others. Consult the documentation of the operating system specific
helper module for further information about your system. (Sys::Filesystem::Linux
for Linux or Sys::Filesystem::Solaris for Solaris etc).
This parameter is mutually exclusive to "regular".
The special_filesystems() method is an alias for this syntax.
regular => 1
Returns only fileystems which are not regarded as special. (Normal filesystems).
This parameter is mutually exclusive to "special".
The regular_filesystems() method is an alias for this syntax.
mounted_filesystems()
Returns a list of all filesystems which can be verified as currently being mounted.
unmounted_filesystems()
Returns a list of all filesystems which cannot be verified as currently being mounted.
special_filesystems()
Returns a list of all fileystems which are considered special. This will usually
contain meta and swap partitions like /proc and /dev/shm on Linux.
regular_filesystems()
Returns a list of all filesystems which are not considered to be special.
Filesystem Properties
Available filesystem properties and their names vary wildly between platforms. Common
aliases have been provided wherever possible. You should check the documentation of the
specific platform helper module to list all of the properties which are available for that
platform. For example, read the Sys::Filesystem::Linux documentation for a list of all
filesystem properties available to query under Linux.
mount_point() or filesystem()
Returns the friendly name of the filesystem. This will usually be the same name as
appears in the list returned by the filesystems() method.
mounted()
Returns boolean true if the filesystem is mounted.
label()
Returns the fileystem label.
This functionality may need to be retrofitted to some original OS specific helper
modules as of Sys::Filesystem 1.12.
volume()
Returns the volume that the filesystem belongs to or is mounted on.
This functionality may need to be retrofitted to some original OS specific helper
modules as of Sys::Filesystem 1.12.
device()
Returns the physical device that the filesystem is connected to.
special()
Returns boolean true if the filesystem type is considered "special".
type() or format()
Returns the type of filesystem format. fat32, ntfs, ufs, hpfs, ext3, xfs etc.
options()
Returns the options that the filesystem was mounted with. This may commonly contain
information such as read-write, user and group settings and permissions.
mount_order()
Returns the order in which this filesystem should be mounted on boot.
check_order()
Returns the order in which this filesystem should be consistency checked on boot.
check_frequency()
Returns how often this filesystem is checked for consistency.
OS SPECIFIC HELPER MODULES
Dummy
The Dummy module is there to provide a default failover result to the main Sys::Filesystem
module if no suitable platform specific module can be found or successfully loaded. This
is the last module to be tried, in order of platform, Unix (if not on Win32), and then
Dummy.
Unix
The Unix module is intended to provide a "best guess" failover result to the main
Sys::Filesystem module if no suitable platform specific module can be found, and the
platform is not 'MSWin32'.
This module requires additional work to improve it's guestimation abilities.
Darwin
First written by Christian Renz <crenz@web42.com>.
Win32
Provides "mount_point" and "device" of mounted filesystems on Windows.
AIX
Please be aware that the AIX /etc/filesystems file has both a "type" and "vfs" field. The
"type" field should not be confused with the filesystem format/type (that is stored in the
"vfs" field). You may wish to use the "format" field when querying for filesystem types,
since it is aliased to be more reliable accross different platforms.
Other
Linux, Solaris, Cygwin, FreeBSD, NetBSD, HP-UX.
OS Identifiers
The following list is taken from perlport. Please refer to the original source for the
most up to date version. This information should help anyone who wishes to write a helper
module for a new platform. Modules should have the same name as ^O in title caps. Thus
'openbsd' becomes 'Openbsd.pm'.
REQUIREMENTS
Sys::Filesystem requires Perl >= 5.6 to run.
TODO
Add support for Tru64, MidnightBSD, Haiku, Minix, DragonflyBSD and OpenBSD. Please
contact me if you would like to provide code for these operating systems.
SUPPORT
You can find documentation for this module with the perldoc command.
perldoc Sys::Filesystem
You can also look for information at:
• RT: CPAN's request tracker
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Sys-Filesystem>
• AnnoCPAN: Annotated CPAN documentation
<http://annocpan.org/dist/Sys-Filesystem>
• CPAN Ratings
<http://cpanratings.perl.org/s/Sys-Filesystem>
• Search CPAN
<http://search.cpan.org/dist/Sys-Filesystem/>
SEE ALSO
perlport, Solaris::DeviceTree, Win32::DriveInfo, Sys::Filesystem::MountPoint
AUTHOR
Nicola Worthington <nicolaw@cpan.org> - <http://perlgirl.org.uk>
Jens Rehsack <rehsack@cpan.org> - <http://www.rehsack.de/>
ACKNOWLEDGEMENTS
See CREDITS in the distribution tarball.
COPYRIGHT
Copyright 2004,2005,2006 Nicola Worthington.
Copyright 2008-2020 Jens Rehsack.
This software is licensed under The Apache Software License, Version 2.0.
<http://www.apache.org/licenses/LICENSE-2.0>