eject



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] -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 dis-
            played 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.


       -t   With  this  option the drive is given a CD-ROM tray close command.
            Not all devices support 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 argument is a number indicating the desired speed  (e.g.
            8  for 8X speed), or 0 for maximum data rate. Not all devices sup-
            port 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  auto-
            matically  mount  removable  media  and  therefore  must be always
            mount()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 abbreviated 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 Macin-
       tosh systems. 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 remem-
       bered names.

       To save typing you can create a shell alias for the eject options  that
       work for your particular 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   (kri-
       vanek@fmph.uniba.sk) and his cdrom_speed command.

       The  -T option was added by Sybren Stuvel (sybren@thirdtower.com), with
       big thanks to Benjamin 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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