preinst is in rmail 8.14.4-2ubuntu2.
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 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | #!/bin/sh -e
#
# Debian pre install script
#
# Install of already installed package:
# 1) Upgrade of package:
# new-preinst upgrade old-version
# *) new-postrm abort-upgrade old-version
# 2) package had some configuration files from a previous version installed
# new-preinst install old-version
# *) new-postrm abort-install old-version
# 3) Otherwise (i.e., the package was completely purged)
# new-preinst install
# *) new-postrm abort-install
#
set -e;
PACKAGE=rmail;
case "$1" in
install)
# DPKG doesn't overwrite directories with symlinks...
if [ -d /usr/share/doc/$PACKAGE ]; then
rm -rf /usr/share/doc/$PACKAGE;
fi;
if [ ! -d /usr/share/doc/sendmail ]; then
mkdir -p /usr/share/doc/sendmail;
chmod a+rx /usr/share/doc/sendmail;
fi;
ln -sf sendmail /usr/share/doc/$PACKAGE;
;;
upgrade)
# DPKG doesn't overwrite directories with symlinks...
if [ -d /usr/share/doc/$PACKAGE ]; then
rm -rf /usr/share/doc/$PACKAGE;
fi;
if [ ! -d /usr/share/doc/sendmail ]; then
mkdir -p /usr/share/doc/sendmail;
chmod a+rx /usr/share/doc/sendmail;
fi;
ln -sf sendmail /usr/share/doc/$PACKAGE;
;;
abort-upgrade)
;;
*)
echo "$PACKAGE preinst called with unknown argument \`$1'" >&2;
exit 1;
;;
esac;
exit 0;
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