This file is indexed.

postinst is in heirloom-mailx 12.5-2.

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.

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#!/bin/sh

set -e

bindir=/usr/bin
mandir=/usr/share/man/man1
program=heirloom-mailx
priority=60

if [ "$1" = "configure" ]; then
    update-alternatives \
        --install "$bindir/mailx"      mailx      "$bindir/$program" "$priority" \
        --slave   "$bindir/mail"       mail       "$bindir/$program"      \
        --slave   "$bindir/Mail"       Mail       "$bindir/$program"      \
        --slave   "$mandir/mailx.1.gz" mailx.1.gz "$mandir/$program.1.gz" \
        --slave   "$mandir/mail.1.gz"  mail.1.gz  "$mandir/$program.1.gz" \
        --slave   "$mandir/Mail.1.gz"  Mail.1.gz  "$mandir/$program.1.gz" 
fi

# Automatically added by dh_installmenu
if [ "$1" = "configure" ] && [ -x "`which update-menus 2>/dev/null`" ]; then
	update-menus
fi
# End automatically added section