1EJECT(1) User Commands EJECT(1)
2
6 eject - eject removable media
7
9 eject -h
10 eject [-vnrsfmqp] [<name>]
11 eject [-vn] -d
12 eject [-vn] -a on|off|1|0 [<name>]
13 eject [-vn] -c slot [<name>]
14 eject [-vn] -t [<name>]
15 eject [-vn] -T [<name>]
16 eject [-vn] -x <speed> [<name>]
17 eject [-vn] -X [<name>]
18 eject -V
19
22 Eject allows removable media (typically a CD-ROM, floppy disk, tape, or
23 JAZ or ZIP disk) to be ejected under software control. The command can
24 also control some multi-disc CD-ROM changers, the auto-eject feature
25 supported by some devices, and close the disc tray of some CD-ROM
26 drives.
27 The device corresponding to <name> is ejected. The name can be a device
29 file or mount point, either a full path or with the leading "/dev",
30 "/media" or "/mnt" omitted. If no name is specified, the default name
31 "cdrom" is used.
32 There are four different methods of ejecting, depending on whether the
34 device is a CD-ROM, SCSI device, removable floppy, or tape. By default
35 eject tries all four methods in order until it succeeds.
36 If the device is currently mounted, it is unmounted before ejecting.
38
41 -h This option causes eject to display a brief description of the
42 command options.
43 -v This makes eject run in verbose mode; more information is dis‐
46 played about what the command is doing.
47 -d If invoked with this option, eject lists the default device name.
50 -a on|1|off|0
53 This option controls the auto-eject mode, supported by some
54 devices. When enabled, the drive automatically ejects when the
55 device is closed.
56 -c <slot>
59 With this option a CD slot can be selected from an ATAPI/IDE CD-
60 ROM changer. Linux 2.0 or higher is required to use this feature.
61 The CD-ROM drive can not be in use (mounted data CD or playing a
62 music CD) for a change request to work. Please also note that the
63 first slot of the changer is referred to as 0, not 1.
64 -t With this option the drive is given a CD-ROM tray close command.
67 Not all devices support this command.
68 -T With this option the drive is given a CD-ROM tray close command if
71 it's opened, and a CD-ROM tray eject command if it's closed. Not
72 all devices support this command, because it uses the above CD-ROM
73 tray close command.
74 -x <speed>
77 With this option the drive is given a CD-ROM select speed command.
78 The speed argument is a number indicating the desired speed (e.g.
79 8 for 8X speed), or 0 for maximum data rate. Not all devices sup‐
80 port this command and you can only specify speeds that the drive
81 is capable of. Every time the media is changed this option is
82 cleared. This option can be used alone, or with the -t and -c
83 options.
84 -X With this option the CD-ROM drive will be probed to detect the
87 available speeds. The output is a list of speeds which can be used
88 as an argument of the -x option. This only works with Linux 2.6.13
89 or higher, on previous versions solely the maximum speed will be
90 reported. Also note that some drive may not correctly report the
91 speed and therefore this option does not work with them.
92 -n With this option the selected device is displayed but no action is
95 performed.
96 -r This option specifies that the drive should be ejected using a
99 CDROM eject command.
100 -s This option specifies that the drive should be ejected using SCSI
103 commands.
104 -f This option specifies that the drive should be ejected using a
107 removable floppy disk eject command.
108 -q This option specifies that the drive should be ejected using a
111 tape drive offline command.
112 -p This option allow you to use /proc/mounts instead /etc/mtab. It
115 also passes the -n option to umount(1).
116 -m This option allows eject to work with device drivers which auto‐
119 matically mount removable media and therefore must be always
120 mount()ed. The option tells eject to not try to unmount the given
121 device, even if it is mounted according to /etc/mtab or
122 /proc/mounts.
123 -V This option causes eject to display the program version and exit.
126
129 All options have corresponding long names, as listed below. The long
130 names can be abbreviated as long as they are unique.
131 -h --help
133 -v --verbose
134 -d --default
135 -a --auto
136 -c --changerslot
137 -t --trayclose
138 -T --traytoggle
139 -x --cdspeed
140 -X --listspeed
141 -n --noop
142 -r --cdrom
143 -s --scsi
144 -f --floppy
145 -q --tape
146 -V --version
147 -p --proc
148 -m --no-unmount
149
152 Eject the default device:
153 eject
155 Eject a device or mount point named cdrom:
157 eject cdrom
159 Eject using device name:
161 eject /dev/cdrom
163 Eject using mount point:
165 eject /mnt/cdrom/
167 Eject 4th IDE device:
169 eject hdd
171 Eject first SCSI device:
173 eject sda
175 Eject using SCSI partition name (e.g. a ZIP drive):
177 eject sda4
179 Select 5th disc on multi-disc changer:
181 eject -v -c4 /dev/cdrom
183 Turn on auto-eject on a SoundBlaster CD-ROM drive:
185 eject -a on /dev/sbpcd
187
190 Returns 0 if operation was successful, 1 if operation failed or command
191 syntax was not valid.
192
195 Eject only works with devices that support one or more of the four
196 methods of ejecting. This includes most CD-ROM drives (IDE, SCSI, and
197 proprietary), some SCSI tape drives, JAZ drives, ZIP drives (parallel
198 port, SCSI, and IDE versions), and LS120 removable floppies. Users have
199 also reported success with floppy drives on Sun SPARC and Apple Macin‐
200 tosh systems. If eject does not work, it is most likely a limitation of
201 the kernel driver for the device and not the eject program itself.
202 The -r, -s, -f, and -q options allow controlling which methods are used
204 to eject. More than one method can be specified. If none of these
205 options are specified, it tries all four (this works fine in most
206 cases).
207 Eject may not always be able to determine if the device is mounted
209 (e.g. if it has several names). If the device name is a symbolic link,
210 eject will follow the link and use the device that it points to.
211 If eject determines that the device can have multiple partitions, it
213 will attempt to unmount all mounted partitions of the device before
214 ejecting. If an unmount fails, the program will not attempt to eject
215 the media.
216 You can eject an audio CD. Some CD-ROM drives will refuse to open the
218 tray if the drive is empty. Some devices do not support the tray close
219 command.
220 If the auto-eject feature is enabled, then the drive will always be
222 ejected after running this command. Not all Linux kernel CD-ROM drivers
223 support the auto-eject mode. There is no way to find out the state of
224 the auto-eject mode.
225 You need appropriate privileges to access the device files. Running as
227 root or setuid root is required to eject some devices (e.g. SCSI
228 devices).
229 The heuristic used to find a device, given a name, is as follows. If
231 the name ends in a trailing slash, it is removed (this is to support
232 filenames generated using shell file name completion). If the name
233 starts with '.' or '/', it tries to open it as a device file or mount
234 point. If that fails, it tries prepending '/dev/', '/media/' ,'/mnt/',
235 '/dev/cdroms', '/dev/rdsk/', '/dev/dsk/', and finally './' to the name,
236 until a device file or mount point is found that can be opened. The
237 program checks /etc/mtab for mounted devices. If that fails, it also
238 checks /etc/fstab for mount points of currently unmounted devices.
239 Creating symbolic links such as /dev/cdrom or /dev/zip is recommended
241 so that eject can determine the appropriate devices using easily remem‐
242 bered names.
243 To save typing you can create a shell alias for the eject options that
245 work for your particular setup.
246
249 Eject was written by Jeff Tranter (tranter@pobox.com) and is released
250 under the conditions of the GNU General Public License. See the file
251 COPYING and notes in the source code for details.
252 The -x option was added by Nobuyuki Tsuchimura
254 (tutimura@nn.iij4u.or.jp), with thanks to Roland Krivanek (kri‐
255 vanek@fmph.uniba.sk) and his cdrom_speed command.
256 The -T option was added by Sybren Stuvel (sybren@thirdtower.com), with
258 big thanks to Benjamin Schwenk (benjaminschwenk@yahoo.de).
259 The -X option was added by Eric Piel (Eric.Piel@tremplin-utc.net).
261
264 mount(2), umount(2), mount(8), umount(8)
265 /usr/src/linux/Documentation/cdrom/
266Linux 12 May 2005 EJECT(1)