#!/bin/bash

USERLIST="$1"

[ ! -f "$USERLIST" ] &&
	echo "Cannot access user list '$USERLIST'! Abort!" && exit 1

# assume format is user:pass
for userpass in `cat $USERLIST` ; do
	user=`echo $userpass | sed 's/\([^:]\):.*/\1/'`
	pass=`echo $userpass | sed 's/.*:\(.*\)/\1/'`
	what=`echo $userpass | sed 's/^\(#\)[^#]*/\1/'`
	[ "$what" == "#" ] && continue
	what=`cat /etc/passwd | grep "$user"`
	[ "$what" != "" ] && continue
	echo "User:[$user],Pass:[$pass]"
	echo "${user}:${pass}::100:User Account:/home/${user}:/bin/bash"
done