Bug#35568: marked as done (apt keeps complaining about dpkg's post-invoke)
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and subject line Remounting /usr RO
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Date: Mon, 05 Apr 1999 02:17:19 +0000 (GMT)
From: Linh Dang <linhd@nortelnetworks.com>
Subject: apt keeps complaining about dpkg's post-invoke
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Package: apt
Version: 0.3.3
when I install with apt, I keep getting this error message after dpkg
finished installing everything:
mount: /usr is busy
E: Problem executing scripts DPkg::Post-Invoke 'mount -o remount,ro /usr'
E: Sub-process returned an error code
My /etc/apt/apt.conf is:
DPkg
{
// Auto re-mounting of a readonly /usr
Pre-Invoke {"mount -o remount,rw /usr";};
Post-Invoke {"mount -o remount,ro /usr";};
}
I type 'mount -o remount,ro /usr', the mount is successful.
My system:
Package: dpkg
Version: 1.4.1.1
Package: libc6
Version: 2.1.1-0.1
Package: libstdc++2.9-glibc2.1
Version: 2.91.63-1.1
Linux gaia 2.2.3l1 #4 Sun Mar 14 04:01:29 EST 1999 i586 unknown
--
Linh Dang
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Date: Sun, 5 Dec 1999 20:02:51 -0700 (MST)
From: Jason Gunthorpe <jgg@ualberta.ca>
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To: 35568-done@bugs.debian.org
Subject: Remounting /usr RO
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Here is my take on this,
APT is carefull to advoid running things in /usr or opening files in /usr
RW. Given this I think being unable to remount user rw is due to either a
subtle kernel problem or just some ordinary race condition.
I belive the best solution to this is use the APT post invoke feature to
spawn a script which does sync; sleep; mount in a loop until /usr is
remounted properly. This way things like update-menus and other packaging
elements will not break the remount. In fact, I think just adding a sync
has a high chance of making the remount work OK.
Jason
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