/usr/share/solr/bin/rsyncd-stop is in solr-common 3.6.2+dfsg-2.
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 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | #!/bin/bash
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Shell script to stop rsyncd on master Solr server
orig_dir=$(pwd)
cd ${0%/*}/..
solr_root=$(pwd)
cd ${orig_dir}
unset user verbose debug
. ${solr_root}/bin/scripts-util
# set up variables
prog=${0##*/}
log=${solr_root}/logs/rsyncd.log
# define usage string
USAGE="\
usage: $prog [-u username] [-v] [-V]
       -u          specify user to sudo to before running script
       -v          increase verbosity
       -V          output debugging info
"
# parse args
while getopts u:vV OPTION
do
    case $OPTION in
    u)
        user="$OPTARG"
        ;;
    v)
        verbose="v"
        ;;
    V)
        debug="V"
        ;;
    *)
        echo "$USAGE"
        exit 1
    esac
done
[[ -n $debug ]] && set -x
fixUser "$@"
logMessage stopped by $oldwhoami
logMessage command: $0 $@
# look for pid file
if [[ ! -f ${solr_root}/logs/rsyncd.pid ]]
then
    logMessage "missing rsyncd pid file ${solr_root}/logs/rsyncd.pid"
    exit 2
fi
# get PID from file
pid=$(<${solr_root}/logs/rsyncd.pid)
if [[ -z $pid ]]
then
    logMessage "unable to get rsyncd's PID"
    exit 2
fi
kill $pid
# wait until rsyncd dies or we time out
dead=0
timer=0
timeout=300
while (( ! dead && timer < timeout ))
do
    if ps -eo pid | grep -qw $pid
    then
	kill $pid
        (( timer++ ))
        sleep 1
    else
        dead=1
    fi
done
if ps -eo pid | grep -qw $pid
then
    logMessage rsyncd failed to stop after $timeout seconds
    exit 3
fi
# remove rsyncd.conf
/bin/rm -f ${solr_root}/conf/rsyncd.conf
 |