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Linux 2.6 - man page for eject (linux section 1)

EJECT(1)				  User Commands 				 EJECT(1)

NAME
       eject - eject removable media

SYNOPSIS
       eject -h
       eject [-vnrsfmqp] [<name>]
       eject [-vn] -d
       eject [-vn] -a on|off|1|0 [<name>]
       eject [-vn] -c slot [<name>]
       eject [-vn] -i on|off|1|0 [<name>]
       eject [-vn] -t [<name>]
       eject [-vn] -T [<name>]
       eject [-vn] -x <speed> [<name>]
       eject [-vn] -X [<name>]
       eject -V


DESCRIPTION
       Eject  allows  removable media (typically a CD-ROM, floppy disk, tape, or JAZ or ZIP disk)
       to be ejected under software control. The command can also control some multi-disc  CD-ROM
       changers,  the  auto-eject  feature  supported by some devices, and close the disc tray of
       some CD-ROM drives.

       The device corresponding to <name> is ejected. The name can be  a  device  file	or  mount
       point,  either  a  full path or with the leading "/dev", "/media" or "/mnt" omitted. If no
       name is specified, the default name "cdrom" is used.

       There are four different methods of ejecting, depending on whether the device is a CD-ROM,
       SCSI  device,  removable floppy, or tape. By default eject tries all four methods in order
       until it succeeds.

       If the device is currently mounted, it is unmounted before ejecting.

COMMAND-LINE OPTIONS
       -h   This option causes eject to display a brief description of the command options.

       -v   This makes eject run in verbose mode; more information is displayed  about	what  the
	    command is doing.

       -d   If invoked with this option, eject lists the default device name.

       -a on|1|off|0
	    This  option  controls the auto-eject mode, supported by some devices.  When enabled,
	    the drive automatically ejects when the device is closed.

       -c <slot>
	    With this option a CD slot can be selected from an ATAPI/IDE  CD-ROM  changer.  Linux
	    2.0  or  higher  is  required to use this feature. The CD-ROM drive can not be in use
	    (mounted data CD or playing a music CD) for a change request  to  work.  Please  also
	    note that the first slot of the changer is referred to as 0, not 1.

       -i on|1|off|0
	    This  option  controls  locking of the hardware eject button. When enabled, the drive
	    will not be ejected when the button is pressed.  This is useful when you are carrying
	    a  laptop  in a bag or case and don't want it to eject if the button is inadvertently
	    pressed.

       -t   With this option the drive is given a CD-ROM tray close command. Not all devices sup-
	    port this command.

       -T   With this option the drive is given a CD-ROM tray close command if it's opened, and a
	    CD-ROM tray eject command if it's closed.  Not  all  devices  support  this  command,
	    because it uses the above CD-ROM tray close command.

       -x <speed>
	    With  this	option the drive is given a CD-ROM select speed command.  The speed argu-
	    ment is a number indicating the desired speed (e.g. 8 for 8X speed), or 0 for maximum
	    data  rate. Not all devices support this command and you can only specify speeds that
	    the drive is capable of. Every time the media is changed this option is cleared. This
	    option can be used alone, or with the -t and -c options.

       -X   With  this option the CD-ROM drive will be probed to detect the available speeds. The
	    output is a list of speeds which can be used as an argument of the	-x  option.  This
	    only works with Linux 2.6.13 or higher, on previous versions solely the maximum speed
	    will be reported. Also note that some drive may not correctly report  the  speed  and
	    therefore this option does not work with them.

       -n   With this option the selected device is displayed but no action is performed.

       -r   This option specifies that the drive should be ejected using a CDROM eject command.

       -s   This option specifies that the drive should be ejected using SCSI commands.

       -f   This  option specifies that the drive should be ejected using a removable floppy disk
	    eject command.

       -q   This option specifies that the drive should be ejected using  a  tape  drive  offline
	    command.

       -p   This  option  allow  you to use /proc/mounts instead /etc/mtab. It also passes the -n
	    option to umount(1).

       -m   This option allows eject to work with device drivers which automatically mount remov-
	    able  media  and  therefore must be always mount(1)ed.  The option tells eject to not
	    try to unmount the given device, even if it is  mounted  according	to  /etc/mtab  or
	    /proc/mounts.

       -V   This option causes eject to display the program version and exit.

LONG OPTIONS
       All options have corresponding long names, as listed below. The long names can be abbrevi-
       ated as long as they are unique.

       -h --help
       -v --verbose
       -d --default
       -a --auto
       -c --changerslot
       -t --trayclose
       -T --traytoggle
       -x --cdspeed
       -X --listspeed
       -n --noop
       -r --cdrom
       -s --scsi
       -f --floppy
       -q --tape
       -V --version
       -p --proc
       -m --no-unmount

EXAMPLES
       Eject the default device:

	      eject

       Eject a device or mount point named cdrom:

	      eject cdrom

       Eject using device name:

	      eject /dev/cdrom

       Eject using mount point:

	      eject /mnt/cdrom/

       Eject 4th IDE device:

	      eject hdd

       Eject first SCSI device:

	      eject sda

       Eject using SCSI partition name (e.g. a ZIP drive):

	      eject sda4

       Select 5th disc on multi-disc changer:

	      eject -v -c4 /dev/cdrom

       Turn on auto-eject on a SoundBlaster CD-ROM drive:

	      eject -a on /dev/sbpcd

EXIT STATUS
       Returns 0 if operation was successful, 1 if operation failed or	command  syntax  was  not
       valid.

NOTES
       Eject  only  works  with devices that support one or more of the four methods of ejecting.
       This includes most CD-ROM drives (IDE, SCSI, and proprietary), some SCSI tape drives,  JAZ
       drives,	ZIP drives (parallel port, SCSI, and IDE versions), and LS120 removable floppies.
       Users have also reported success with floppy drives on Sun SPARC and Apple Macintosh  sys-
       tems.  If eject does not work, it is most likely a limitation of the kernel driver for the
       device and not the eject program itself.

       The -r, -s, -f, and -q options allow controlling which methods are  used  to  eject.  More
       than  one  method  can  be specified. If none of these options are specified, it tries all
       four (this works fine in most cases).

       Eject may not always be able to determine if the device is mounted (e.g. if it has several
       names).	If  the  device  name  is a symbolic link, eject will follow the link and use the
       device that it points to.

       If eject determines that the device can have  multiple  partitions,  it	will  attempt  to
       unmount	all  mounted  partitions  of the device before ejecting. If an unmount fails, the
       program will not attempt to eject the media.

       You can eject an audio CD. Some CD-ROM drives will refuse to open the tray if the drive is
       empty. Some devices do not support the tray close command.

       If  the auto-eject feature is enabled, then the drive will always be ejected after running
       this command. Not all Linux kernel CD-ROM drivers support the auto-eject mode. There is no
       way to find out the state of the auto-eject mode.

       You need appropriate privileges to access the device files. Running as root or setuid root
       is required to eject some devices (e.g. SCSI devices).

       The heuristic used to find a device, given a name, is as follows. If the name  ends  in	a
       trailing  slash,  it  is  removed (this is to support filenames generated using shell file
       name completion). If the name starts with '.' or '/', it tries to open it as a device file
       or  mount  point.  If  that  fails,  it	tries  prepending  '/dev/',  '/media/'	,'/mnt/',
       '/dev/cdroms', '/dev/rdsk/', '/dev/dsk/', and finally './' to the  name,  until	a  device
       file  or mount point is found that can be opened. The program checks /etc/mtab for mounted
       devices. If that fails, it also checks /etc/fstab for mount points of currently	unmounted
       devices.

       Creating  symbolic  links  such as /dev/cdrom or /dev/zip is recommended so that eject can
       determine the appropriate devices using easily remembered names.

       To save typing you can create a shell alias for the eject options that work for your  par-
       ticular setup.

AUTHOR
       Eject was written by Jeff Tranter (tranter@pobox.com) and is released under the conditions
       of the GNU General Public License. See the file COPYING and notes in the source	code  for
       details.

       The  -x	option was added by Nobuyuki Tsuchimura (tutimura@nn.iij4u.or.jp), with thanks to
       Roland Krivanek (krivanek@fmph.uniba.sk) and his cdrom_speed command.

       The -T option was added by Sybren Stuvel (sybren@thirdtower.com), with big thanks to  Ben-
       jamin Schwenk (benjaminschwenk@yahoo.de).

       The -X option was added by Eric Piel (Eric.Piel@tremplin-utc.net).

SEE ALSO
       mount(2), umount(2), mount(8), umount(8)
       /usr/src/linux/Documentation/cdrom/

Linux					   12 May 2005					 EJECT(1)


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