postinst is in grub-linuxbios 1.99-21ubuntu3.
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 | #! /bin/sh
set -e
case "$1" in
configure)
if dpkg --compare-versions "$2" lt-nl 1.99-1; then
# Force dpkg to replace this directory with a symlink.
if [ ! -L /usr/share/doc/@PACKAGE@ ] && [ -d /usr/share/doc/@PACKAGE@ ]; then
if rmdir /usr/share/doc/@PACKAGE@ 2>/dev/null; then
ln -sf grub-common /usr/share/doc/@PACKAGE@
fi
fi
fi
;;
esac
exit 0
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