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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
Old 05-29-2008
Thank you for the info!
Quote:
Why do you need to un-mount it ? Try < -f > flag, for force.
Hey! maybe there is a work-around?...

Perhaps I should describe the goal? That always seems to help. Smilie

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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rpm2cpio(1)							   User Commands						       rpm2cpio(1)

NAME
rpm2cpio - convert Red Hat Package (RPM) to cpio archive SYNOPSIS
rpm2cpio [file.rpm] DESCRIPTION
The rpm2cpio utility converts the .rpm file specified as its sole argument to a cpio archive on standard output. (See NOTES.) If no argu- ment is given, an rpm stream is read from standard input. In both cases, rpm2cpio will fail and print a usage message if the standard out- put is a terminal. Therefore, the output is usually redirected to a file or piped through the cpio(1) utility. EXAMPLES
Example 1: Converting an rpm file example% rpm2cpio Device3Dfx-1.1-2.src.rpm | cpio -itv CPIO archive found! -rw-r--r-- 1 root root 2635 Sep 13 16:39 1998, 3dfx.gif -rw-r--r-- 1 root root 11339 Sep 27 16:03 1998, Dev3Dfx.tar.gz -rw-r--r-- 1 root root 1387 Sep 27 16:04 1998, Device3Dfx-1.1-2.spec 31 blocks Example 2: Converting from standard input example% rpm2cpio < Device3Dfx-1.1-2.src.rpm | cpio -itv CPIO archive found! -rw-r--r-- 1 root root 2635 Sep 13 16:39 1998, 3dfx.gif -rw-r--r-- 1 root root 11339 Sep 27 16:03 1998, Dev3Dfx.tar.gz -rw-r--r-- 1 root root 1387 Sep 27 16:04 1998, Device3Dfx-1.1-2.spec 31 blocks ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWrpm | +-----------------------------+-----------------------------+ SEE ALSO
cpio(1), attributes(5) NOTES
rpm2cpio handles versions 3 and 4 RPMs. SunOS 5.10 20 Aug 2001 rpm2cpio(1)
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