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#!/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.
#
usage() {
echo "Usage: $0 [options] command.
Run a command on each host in \$HOSTS.
Options:
-l USER passed to ssh - run as USER.
-t passed to ssh - create a terminal.
-b run in background, wait for commands to complete.
-d run in background, don't wait for commands to complete.
-s SECONDS sleep between starting commands.
-q don't print banner lines for each host.
-o SUFFIX log output of each command to <host>.SUFFIX
-X passed to ssh - forward X connection.
"
exit 1
}
while getopts "tl:bs:dqo:X" opt; do
case $opt in
l) SSHOPTS="-l$OPTARG $SSHOPTS" ;;
t) SSHOPTS="-t $SSHOPTS" ;;
b) BACKGROUND=1 ;;
d) BACKGROUND=1; DISOWN=1 ;;
s) SLEEP="sleep $OPTARG" ;;
q) NOBANNER=1 ;;
o) SUFFIX=$OPTARG ;;
X) SSHOPTS="-X $SSHOPTS" ;;
*) usage;;
esac
done
shift `expr $OPTIND - 1`
test "$*" || usage;
OK_FILE=`mktemp` # Will be deleted if anything goes wrong.
trap "rm -f $OK_FILE" EXIT
do_ssh() {
h=$1; shift
if test $SUFFIX ; then ssh $SSHOPTS $h "$@" &> $h.$SUFFIX
else ssh $SSHOPTS $h "$@"; fi || rm -rf $OK_FILE;
}
for h in $HOSTS ; do
test "$NOBANNER" || echo "== ssh $SSHOPTS $h $@ =="
if [ "$BACKGROUND" = 1 ]; then
do_ssh $h "$@" &
CHILDREN="$! $CHILDREN"
else
do_ssh $h "$@"
fi
$SLEEP
done
if [ "$DISOWN" = 1 ]; then
for c in $CHILDREN; do disown $c; done
else
wait
fi
test -f $OK_FILE
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