EJECT(1)                                  User Commands                                  EJECT(1)



NAME
       eject - eject removable media

SYNOPSIS
       eject -h
       eject [-vnrsfqp] [<name>]
       eject [-vn] -d
       eject [-vn] -a on|off|1|0 [<name>]
       eject [-vn] -c slot [<name>]
       eject [-vn] -t [<name>]
       eject [-vn] -x <speed> [<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" 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.


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


       -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).


       -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
       -x --cdspeed
       -n --noop
       -r --cdrom
       -s --scsi
       -f --floppy
       -q --tape
       -V --version
       -p --proc


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 mult-disc changer:

              eject -v -c5 /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/', '/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 () 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 (), with  thanks  to
       Roland Krivanek () and his cdrom_speed command.


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



Linux                                      18 May 2001                                   EJECT(1)