preinst is in dpkg 1.18.4ubuntu1.
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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | #!/bin/sh
# This script can be called in the following ways:
#
# Before the package is installed:
# <new-preinst> install
#
# Before removed package is upgraded:
# <new-preinst> install <old-version>
#
# Before the package is upgraded:
# <new-preinst> upgrade <old-version>
#
#
# If postrm fails during upgrade or fails on failed upgrade:
# <old-preinst> abort-upgrade <new-version>
set -e
# Handle upgrades from pre-conffile dpkg.cfg
upgrade_dpkg_non_conffile()
{
if [ -r /etc/dpkg/dpkg.cfg ]; then
dpkg_cfg_md5="535552ad5ee9145dbc7a34c264df4e59 /etc/dpkg/dpkg.cfg"
if echo "$dpkg_cfg_md5" | md5sum -c >/dev/null 2>&1; then
echo "Removing non-modified dpkg.cfg to be replaced by a conffile ..."
rm -f /etc/dpkg/dpkg.cfg
fi
fi
}
kill_bad_alternatives () {
local IFS=""
admindir=${DPKG_ADMINDIR:-/var/lib/dpkg}
ALTDIR="$admindir/alternatives"
for alt in $ALTDIR/*; do
if [ ! -f $alt ]; then
# In case it's been removed by the code below, or in case
# it's not a real file
continue
fi
{
read mode || continue
read mainlink || continue
while true; do
read slave || break
if [ "$slave" = "" ]; then
break
fi
if [ -e "$ALTDIR/$slave" ]; then
echo "Removing conflicting master alternative $slave (it is slave of $(basename $alt))..."
rm -f "$ALTDIR/$slave"
fi
read slavelink || break
done
} <$alt
done
}
case "$1" in
install)
;;
upgrade)
# Cleanup bad alternatives that would choke with new
# update-alternatives (see #530633, #531611, #532739, #521760)
if dpkg --compare-versions "$2" lt 1.15.3; then
kill_bad_alternatives
fi
case "$2" in
# Upgrade from pre-conffile dpkg.cfg
1.9.21 | 1.10.* )
upgrade_dpkg_non_conffile
;;
esac
;;
abort-upgrade)
;;
*)
echo "$0 called with unknown argument '$1'" 1>&2
exit 1
;;
esac
exit 0
|