#!/bin/csh
###############################################################
# This script prints a random number between 1 and the
# number passed in as an argument.
# It returns 0 on success, nonzero on failure.
##############################################################

##############################################################
# Argument checking

# Make sure they passed in a parameter
set maxnum = $1
if (0 == `echo -n "$maxnum" | wc -c`) then
	echo Usage: $0 maximum_number
	exit 1
endif
# Make sure that it is a number larger than zero
if (0 >= "$maxnum" ) then
	echo Usage: $0 maximum_number
	exit 1
endif

##############################################################
# Pick one based on the number of nanoseconds mod the largest
# number.  Then add one to that to make it go from 1 through
# the number itself.

@ num = ( `date +%N` / 1000 ) % $maxnum
@ num ++

echo $num

exit 0