preinst is in orville-write 2.55-3build1.
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 | #!/bin/sh -e
if [ -f /usr/bin/std-write ]; then
rm -f /usr/bin/write
dpkg-divert --package orville-write --remove --rename \
--divert /usr/bin/std-write /usr/bin/write
fi
if [ -f /usr/share/man/man1/std-write.1.gz ]; then
rm -f /usr/share/man/man1/write.1.gz
dpkg-divert --package orville-write --remove --rename \
--divert /usr/share/man/man1/std-write.1.gz /usr/share/man/man1/write.1.gz
fi
if [ "$1" = "install" ]; then
dpkg-divert --package orville-write --add --rename \
--divert /usr/bin/std-mesg /usr/bin/mesg
dpkg-divert --package orville-write --add --rename \
--divert /usr/share/man/man1/std-mesg.1.gz /usr/share/man/man1/mesg.1.gz
fi
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