#!/bin/bash
#
# To get this to work, there needs to be an appropriate
# .rhosts file in the home directory (for root, this is /root).
#
#   Lots of help from info bash and from the web pages
#     http://www.gnu.org/software/bash/manual/bash.html
#     http://www.tldp.org/LDP/abs/html/
#   Assignments must have no spaces around the equals sign!
#
# Example for updating the time:
#
#   do-lab date -s \"`date`\"
#   do-lab /sbin/hwclock --systohc
#
if [ "$1" = "-h" -o "$1" = "--help" ]; then
    echo "Usage:  $0 [-o] command"
    echo " -o only executes on other machines in list"
    echo "Quotes on \"command\" is sometimes useful."
    echo "No \"command\" executes a login on each machine;"
    echo "for example, a compound command would look something like:"
    echo "    $0 \"command1; command2\""
    exit 1
fi
#
if [ "$1" = "-o" ]; then
    othersonly=1
    shift
fi
#
list="barak deborah jair gideon ehud shamgar jephthah jael"
#
for i in $list; do
    if [ "$othersonly" -a "$i" = `hostname` ]; then
	echo "host $i excluded:"
    else
        echo "host `rsh $i hostname`:"
        rsh $i $@
    fi
done