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Operating Systems
Linux
Gentoo
automating chroot and mount/unmount
Post 302200682 by duderonomy on Thursday 29th of May 2008 08:53:13 PM
05-29-2008
Thank you for the info!
Hey! maybe there is a work-around?...
Perhaps I should describe the goal? That always seems to help.
The motivation for chroot'ing is that I am not familiar with another way
to run mkinitrd. Honestly, I am surprised there is not -root option such
as with the rpm command or tar's -C, etc. If I could specify my root
file system on the command line then I would not need to chroot to
run mkinitrd.
So, to answer your question, the reason I believe I need to unmount, is
because after chroot exits, I archive the entire file system with tar.
If I do not unmount, tar complains with errors that the file system is
mounted or some such message. I can set up the situation again and
fetch the exact error message.
Through experience, I know that if I unmount properly, I avoid the
tar error when creating the tar archive.
Cheers,
:-D
Quote:
Why do you need to un-mount it ? Try < -f > flag, for force.
Perhaps I should describe the goal? That always seems to help.
The motivation for chroot'ing is that I am not familiar with another way
to run mkinitrd. Honestly, I am surprised there is not -root option such
as with the rpm command or tar's -C, etc. If I could specify my root
file system on the command line then I would not need to chroot to
run mkinitrd.
So, to answer your question, the reason I believe I need to unmount, is
because after chroot exits, I archive the entire file system with tar.
If I do not unmount, tar complains with errors that the file system is
mounted or some such message. I can set up the situation again and
fetch the exact error message.
Through experience, I know that if I unmount properly, I avoid the
tar error when creating the tar archive.
Cheers,
:-D
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LEARN ABOUT OPENSOLARIS
rmumount
rmmount(1) User Commands rmmount(1) NAME
rmmount, rmumount - mounts and unmounts removable media SYNOPSIS
rmmount [-u] [-o options] [nickname | device] [mount_point] rmmount [-d] [-l] rmumount [nickname | mount_point | device] rmumount [-d] [-l] DESCRIPTION
The rmmount and rmumount utilities mount and unmount removable or hot-pluggable volumes. The optional argument can identify the volume by its volume label, mount point or block device path. rmmount can also take additional mount options if the user has sufficient privileges to override the default mount options. Unmounting removable media does not result in its ejection. Use eject(1) to optionally unmount and eject the media. OPTIONS
The following options are supported for rmmount and rmumount: -d Display the device path of the default device. This device is used if no arguments are supplied. -l Display the paths and nicknames of mountable devices. The following options are supported for rmmount only: -o options Display mount options. This option can only be used by users that have privileges to override the system default options. -u Unmounts the volume as opposed to mounting it. OPERANDS
The following operands are supported: device Specifies which device to mount or unmount, by the name it appears in the directory /dev. mount_point Specifies which device to mount or unmount, by the name it appears in the directory /dev. nickname Specifies which device to mount or unmount, by its nickname as known to this command. EXAMPLES
Example 1 Mounting a USB disk The following example mounts a USB disk with a volume label of PHOTOS: example% rmmount PHOTOS Example 2 Unmounting a pcfs Volume The following example unmounts a pcfs volume by device path: example% rmumount /dev/dsk/c4t0d0p0:1 EXIT STATUS
The following exit values are returned: 0 Successful completion. >0 An error occurred. FILES
/media Default mount root. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWrmvolmgr | +-----------------------------+-----------------------------+ |Interface Stability |Uncommitted | +-----------------------------+-----------------------------+ SEE ALSO
eject(1), attributes(5) SunOS 5.11 18 Sep 2006 rmmount(1)