postinst is in razorqt-session 0.5.2-4.
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 | #!/bin/sh
set -e
case "$1" in
"configure"|"abort-upgrade"|"abort-remove"|"abort-deconfigure")
update-alternatives \
--install /usr/bin/x-session-manager \
x-session-manager \
/usr/bin/razor-session \
50 \
--slave /usr/share/man/man1/x-session-manager.1.gz \
x-session-manager.1.gz \
/usr/share/man/man1/razor-session.1.gz
;;
esac
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