prerm is in ecryptfs-utils 111-0ubuntu5.
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 34 | #!/bin/sh -e
if [ "$1" = remove ]; then
# We should do some checking to prevent removal of ecryptfs if in use
# Check active mounts
if out=`mount | grep "\Wtype\Wecryptfs\W"`; then
echo "WARNING: Should not remove ecryptfs-utils, as it appears to be in use:" 1>&2
echo "$out" 1>&2
fi
if out=`grep "\Wecryptfs\W" /proc/mounts`; then
echo "WARNING: Should not remove ecryptfs-utils, as it appears to be in use:" 1>&2
echo "$out" 1>&2
fi
# Check fstab
if out=`grep "\Wecryptfs\W" /etc/fstab`; then
echo "WARNING: Should not remove ecryptfs-utils, as it appears to be in use:" 1>&2
echo "$out" 1>&2
fi
# Check home directories
for i in `ls /home`; do
if [ -d "/home/$i/.ecryptfs" ]; then
# If we find a .ecryptfs directory (or link) in a home,
# directory, then someone is using ecryptfs-utils, and
# we should not allow package removal
echo "WARNING: Should not remove ecryptfs-utils, as it appears to be in use:" 1>&2
echo " [/home/$i/.ecryptfs]" 1>&2
fi
done
pam-auth-update --package --remove ecryptfs-utils
fi
exit 0
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