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Name    [Toc]    [Back]

       fdmount - Floppy disk mount utility

Note    [Toc]    [Back]

       This  manpage  has  been automatically generated from fdutils's texinfo
       documentation.  However, this process is only approximative,  and  some
       items,  such as crossreferences, footnotes and indices are lost in this
       translation process.  Indeed, these items have no appropriate representation
  in  the	manpage  format.  Moreover, only the items specific to
       each command have been translated, and the  general  information  about
       fdutils	has  been  dropped  in	the  manpage version.  Thus I strongly
       advise you to use the original texinfo doc.

       *      To generate a printable copy from the texinfo doc, run the  following

		     ./configure; make dvi; dvips fdutils.dvi

       *      To generate a html copy,	run:

		     ./configure; make html

	      A       premade	    html       can	be	found	   at:

       *      To generate an info copy (browsable  using  emacs'  info	mode),

		     ./configure; make info

       The  texinfo doc looks most pretty when printed or as html.  Indeed, in
       the info version certain examples are difficult	to  read  due  to  the
       quoting conventions used in info.

Description    [Toc]    [Back]

	  fdmount [-l] [--list] [-d] [--daemon] [--detach]
	  [-i interval] [--interval interval] [-o mount-options]
	  [-r] [-readonly] [-s] [--sync] [--nosync] [--nodev]
	  [--nosuid] [--noexec] [-f] [--force] [-h] [--help]
	  [drivename] [mountpoint]

	  fdumount [-f] [--force] [drivename]


	  fdmountd [-i interval] [--interval interval] [-r]
	  [-readonly] [-s] [--sync] [--nosync] [--nodev]
	  [--nosuid] [--noexec] [--help] [drivename] [mountpoint]]

       The  fdmount  program  mounts  a floppy disk in the specified drive. It
       tries to figure out the exact format and filesystem type  of  the  disk
       from  data  in  the  disk's  boot  sector  or super block and the autodetected
 track layout.

       Currently, fdmount supports the filesystems minix, ext, ext2, xia,  and
       msdos, and includes special support for disks formatted by the 2M utility
 for MS-DOS.

       It also checks whether the disk is write protected, in which case it is
       mounted read-only.

       The  symbolic  drivename is (currently) one of `fd[0-7]', corresponding
       to the special device files `/dev/fd[0-7]'. If drivename is not	specified,
 `fd0' is assumed.

       The  disk  is  mounted on the directory mountpoint, if specified, or on
       `/fd[0-7]'.  In either case, the  mount	point  must  be  an  existing,
       writable directory.

       Due  to	a bug in the floppy driver (?), the polling interval (-i flag)
       must be longer than the spindown offset. Thus you need to do (for exam-
       ple)  floppycontrol  --spindown	99  before starting fdmountd in daemon

Options    [Toc]    [Back]

       -l --list
	      List all known drives with their symbolic name, type, and  mount

       -d --daemon
	      Run in daemon mode (see below).

	      Runs  daemon  in	background, and detaches it from its tty. Messages
 produced after the fork are logged to syslog.

       -p file
       --pidfile file

	      Dumps the process id of the daemon to file. This	makes  killing
	      the daemon easier: kill -9 `cat file`

       -i interval
       --interval interval
	      Set  the polling interval for daemon mode. The unit for interval
	      is 0.1 seconds, the default value is 10 (i.e. 1 second).

       -o options
       --options options
	      Sets filesystem-specific options. So far, these are only	available
  for DOS and Ext2 disks. The following DOS options are supported:
 check, conv, dotsOK, debug, fat, quiet, blocksize.   The
	      following Ext2 options are supported: check, errors, grpid, bsdgroups,
 nogrpid,	sysvgroups,  bsddf,  minixdf,  resgid,	debug,
	      nocheck.	 When running as a daemon, options not applying to the
	      disk that is inserted (because of its filesystem type)  are  not
	      passed to mount.

       -r --readonly
	      Mount  the  disk read-only. This is automatically assumed if the
	      disk is write protected.

       -s --sync
	      Mount with the SYNC option.

	      Mounts without the SYNC option, even when running as daemon.

	      Mount with the NODEV option. Ignored for msdos filesystems, otherwise
 always set for non-root users.

	      Mount  with  the	NOSUID	option. Ignored for msdos filesystems,
	      otherwise always set for non-root users.

	      Mount with the NOEXEC option.

       -f --force
	      Attempt a mount or unmount operation even `/etc/mtab' says  that
	      the  drive  is  already  mounted,  or not mounted, respectively.
	      This option is useful if `/etc/mtab' got out of  sync  with  the
	      actual state for some reason.

       -h --help
	      Show short parameter description

Security    [Toc]    [Back]

       When  mounting  on  the default mount point, the mount points' owner is
       set to the current user, and the access flags according to  the	user's
       umask.	For  a	specified  mountpoint,	owner and permissions are left
       unchanged. Default mount points are called /fd0, /fd1, ... , /fd7.

       The user running fdmount must have read access to the floppy device for
       read only mounts, and read/write access for read/write mounts.

       Fdmount can be run suid root, allowing users to mount floppy disks. The
       following restrictions are placed upon non-root users:

       *      If a mountpoint is specified explicitly, it must be owned by the

       *      A  user  may  only unmount a disk if the mount point is owned by
	      the user, or if it the disk has been mounted by the same user.

       *      Non-msdos disks are automatically mounted  with  the  nodev  and
	      nosuid flags set.

       However, do not rely on fdmount being secure at the moment.

Daemon mode    [Toc]    [Back]

       In  daemon  mode,  the specified drive is periodically checked and if a
       disk is inserted, it is automatically mounted.

       When the disk is removed, it is automatically unmounted.   However,  it
       is  recommended	to  unmount  the  disk manually before removing it. In
       order to limit corruption, disks are mounted with the SYNC option  when
       running in daemon mode, unless the --nosync flag is given.

       Note that this mode has some potential drawbacks:

       *      Some  floppy  drives  have  to move the drive head physically in
	      order to reset the disk change signal.  It  is  strongly	recommended
  not  to  use daemon mode with these drives.  See section
	      floppycontrol for details.

       *      If a disk does not contain a filesystem (e.g.  a	tar  archive),
	      the mount attempt may slow down initial access.

       *      As  fdmount  cannot  identify  the  user	trying to use the disk
	      drive, there is no way to  protect  privacy.  Disks  are	always
	      mounted with public access permissions set.

Diagnostics    [Toc]    [Back]

       error opening device name

       error reading boot/super block
	      fdmount  failed to read the first 1K of the disk. The disk might
	      be damaged, unformatted, or it may have a format wich is	unsupported
 by the FDC or the Linux kernel.

       unknown filesystem type
	      No  magic number of any of the supported filesystems (see above)
	      could be identified.

       sorry, can't figure out format (fs filesystem)
	      The size of the filesystem on the disk is incompatible with  the
	      track  layout  detected  by  the kernel and an integer number of
	      tracks. This may occur if the filesystem uses only part  of  the
	      disk,  or  the track layout was detected incorrectly by the kernel.

       failed to mount fs> <sizeK-disk
	      The actual mount system call failed.

       failed to unmount
	      The actual unmount system call failed.

       cannot create lock file /etc/mtab~
	      If `/etc/mtab~' exists, you should probably  delete  it.	Otherwise,
 check permissions.

       Can't access mountpoint
	      Most  probably,  the  default  or specified mount point does not
	      exist.  Use mkdir.

       mountpoint is not a directory
	      The mountpoint is not a directory.

       not owner of mountpoint
	      Non-root users must own the directory specified as mount	point.
	      (This does not apply for the default mount points, /fd[0-3].)

       No write permission to mountpoint
	      Non-root	users  must  have  write permission on the mount point

       Not owner of mounted directory: UID=uid
	      Non-root users cannot unmount if the mount point is owned  (i.e.
	      the disk was mounted) by another user.

       invalid drive name
	      Valid drive names are `fd0', `fd1', etc.

       drive name does not exist
	      The  drive  does	not  exist physically, is unknown to the Linux
	      kernel, or is an unknown type.

       Drive name is mounted already
	      Trying to mount a drive which appears  to  be  mounted  already.
	      Use the --force option if you think this is wrong.

       Drive name is not mounted
	      Trying  to  unmount a drive which does not appear to be mounted.
	      Use the --force option if you think this is wrong.

       ioctl(...) failed
	      If this occurs with the FDGETDRVTYP or FDGETDRVSTAT, ioctl's you
	      should probably update your Linux kernel.

       mounted fs size-disk (options)
	      Success message.

Bugs    [Toc]    [Back]

       *      Fdmount  should  be  more flexible about drive names and default
	      mount points (currently hard coded).

       *      Probably not very secure yet (when running suid root).  Untested
	      with ext and xia filesystems.

       *      Can't specify filesystem type and disk layout explicitly.

       *      In daemon mode, the drive light stays on all the time.

       *      Some newer filesystem types, such as vfat are not yet supported.

See Also    [Toc]    [Back]

       Fdutils' texinfo doc

fdutils-5.3			    02Jul99			    fdmount(1)
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