Shell Programming and Scripting

!/bin/sh -x
usage() {
  echo "Usage: $1 <poolname> <group_a|group_b> <enable|disable>"
}
action() {
b pool $1 member $2 session $3
}
if [ $# -ne 3 ]; then
  usage $0
  exit 1
fi
POOLNAME=$1
GROUP=$2
VERB=$3
case "$GROUP" in
  "group_a")
     GROUP=`for i in $(cat groupa.txt); do echo $i; done`
    ;;
  "group_b")
     GROUP=`for i in $(cat groupb.txt); do echo $i; done`
    ;;
  *)
    echo "Unknown action $GROUP"
esac
case "$VERB" in
  "enable")
    action $POOLNAME $GROUP $VERB
    ;;
  "disable")
    action $POOLNAME $GROUP $VERB
    ;;
  *)
    echo "Unknown action $VERB"
esac

#!/bin/sh
while read line; do 
b pool $1 member $line session $3
done < $2.txt

#!/bin/bash
[ $# -ne 3 ] && { echo "Usage: $0 <poolname> <group_a|group_b> <enable|disable>"; exit 1; }
[ $2 != group_a ] && [ $2 != group_b ] && { echo "Unknown action $2"; exit 1; }
[ $3 != enable ] && [ $3 != disable ] && { echo "Unknown action $3"; exit 1; }
while read L
do
    b pool $1 member $L session $3
done < ${2/_/}.txt # to remove the '_' from parameter $2

done < ${2/_/}.txt
# in
done < $2.txt