1:eject
From Linux Man Pages
eject - eject removable media
Contents |
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] -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", "/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.
-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 com-
mand if it's closed. Not all devices support this command, because it uses the above CD-ROM tray close com-
mand.
-x <speed>
With this option the drive is given a CD-ROM select speed command. The speed argument is a number indicat-
ing 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).
-m This option allows eject to work with device drivers which automatically 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
-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 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 parti-
tions 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 particular setup.
RELATED
mount(2), umount(2), mount(8), umount(8) /usr/src/linux/Documentation/cdrom/