preinst is in apt 0.8.16~exp12ubuntu10.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | #! /bin/sh
set -e
# dpkg does this for us while we are upgrading..
#if [ "$1" = "upgrade" -a -L /var/state/apt -a -e /var/lib/apt -a ! -L /var/state/apt ] && dpkg --compare-versions "$2" ">=" "0.4.10"; then
# rm /var/state/apt
#fi
dpkg-maintscript-helper rm_conffile /etc/apt/apt.conf.d/01ubuntu \
0.8.16~exp12ubuntu6 -- "$@"
if [ "$1" = "upgrade" -o "$1" = "install" -a "$2" != "" ]; then
if [ ! -e /var/lib/apt -a -e /var/state/apt ]; then
# upgrading from /var/state/apt using apt.
# it's probably running now so we want to ensure /var/state/apt
# is still valid afterwards. and since we're upgrading
if [ -x /usr/bin/perl -a -d /var/state/apt -a ! -L /var/state/apt ] &&
perl -e 'exit 1 if ((stat("/var/lib"))[0] != (stat("/var/state/apt"))[0])'
then
# same fs, we can mv it
mv /var/state/apt /var/lib/apt
ln -s ../lib/apt /var/state/apt
# note that this symlink (/var/state/apt) will be removed when
# dpkg finishes unpacking the apt we're about to install; this is okay
else
# scary, let's just symlink it and hope
ln -s /var/state/apt /var/lib/apt
fi
fi
touch /var/lib/apt/lists/partial/.delete-me-later || true
fi
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