/usr/sbin/sharedindexinstall is in courier-base 0.76.3-5+deb9u1.
This file is owned by root:root, with mode 0o755.
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 | #! /bin/sh
#
# Copyright 2004 Double Precision, Inc.
# See COPYING for distribution information.
#
# Sample script to safely update shared folder index files.
prefix="/usr"
sysconfdir="/etc/courier"
shareddir="$sysconfdir/shared" # Where the shared index files are kept
newshareddir="$sysconfdir/shared.tmp" # Updated shared index
if test `ls "$newshareddir" | wc -l` = 0
then
echo "$newshareddir is empty!"
exit 1 # Sanity check
fi
if test ! -d "$shareddir"
then
echo "$shareddir does not exist!"
exit 1
fi
# First, remove obsoleted files
ls "$shareddir" | while read F
do
test -f "$newshareddir/$F" || rm -f "$shareddir/$F"
done
mv -f "$newshareddir"/* "$shareddir"
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