postinst is in icedtea-netx 1.5.3-0ubuntu0.14.04.1.
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.
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set -e
multiarch=x86_64-linux-gnu
priority=1061
basedir=/usr/lib/jvm/java-6-openjdk-amd64
mandir=$basedir/jre/man
priority7=1071
base7dir=/usr/lib/jvm/java-7-openjdk-amd64
man7dir=$base7dir/jre/man
tools='javaws itweb-settings'
srcext=1.gz
dstext=1.gz
case "$1" in
configure)
if [ -z "$2" ]; then
update_alternatives=y
fi
if [ -n "$multiarch" ] && [ -n "$2" ]; then
for i in $tools; do
if [ -z "$(update-alternatives --list $i 2>/dev/null | grep ^$basedir/)" ]; then
update_alternatives=y
break
fi
done
fi
if [ "$update_alternatives" != y ] && [ $priority -gt 1060 ]; then
for i in $tools; do
oldp=$(update-alternatives --query java | awk -v b=$basedir '/^Alternative:/ && $2~b {p=1} /^Priority:/ && p {print $2; exit}')
if [ -n "$oldp" ] && [ "$oldp" -le 1060 ]; then
update_alternatives=y
break
fi
done
fi
if [ "$update_alternatives" = y ]; then
if [ -n "$multiarch" ] && [ "$DPKG_MAINTSCRIPT_ARCH" != $(dpkg --print-architecture) ]; then
priority=$(expr $priority - 1)
priority7=$(expr $priority7 - 1)
fi
for i in $tools; do
unset slave1 || true
if [ -e $mandir/man1/$i.$srcext ]; then
slave1="--slave \
/usr/share/man/man1/$i.$dstext \
$i.$dstext \
$mandir/man1/$i.$srcext"
fi
update-alternatives \
--install \
/usr/bin/$i \
$i \
$basedir/jre/bin/$i \
$priority \
$slave1
done
for i in $tools; do
unset slave1 || true
if [ -e $man7dir/man1/$i.$srcext ]; then
slave1="--slave \
/usr/share/man/man1/$i.$dstext \
$i.$dstext \
$man7dir/man1/$i.$srcext"
fi
update-alternatives \
--install \
/usr/bin/$i \
$i \
$base7dir/jre/bin/$i \
$priority7 \
$slave1
# 6's priority is higher, but 6 is not installed, set it to 7
if [ $priority -gt $priority7 ] && [ ! -f $base7dir/jre/bin/$i ]; then
update-alternatives --set $i $base7dir/jre/bin/$i
fi
# 7's priority is higher, but 7 is not installed, set it to 6
if [ $priority7 -gt $priority ] && [ ! -f $basedir/jre/bin/$i ]; then
update-alternatives --set $i $basedir/jre/bin/$i
fi
done
fi
esac
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