postinst is in xz-utils 5.1.1alpha+20120614-2ubuntu2.
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 | #!/bin/sh
set -e
slave () {
dir=$1 filename=$2 target=$3
echo "--slave $dir/$filename $filename $dir/$target"
}
update-alternatives --install /usr/bin/lzma lzma /usr/bin/xz 20 $(
slave /usr/share/man/man1 lzma.1.gz xz.1.gz
slave /usr/bin unlzma unxz
slave /usr/share/man/man1 unlzma.1.gz unxz.1.gz
for util in cat more less diff cmp grep egrep fgrep
do
slave /usr/bin lz$util xz$util
slave /usr/share/man/man1 lz$util.1.gz xz$util.1.gz
done
)
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