Shell Programming and Scripting

serverB$ grep user1 /etc/passwd
user1:x:921:921::/home/user1:/home/user1/insert_host_ip_named.bash

serverA$ ssh -t user1@serverB

echo $#
echo $*
sleep 3
exit

 ssh user1@serverB -- "-i 275.30.44.55 -n WYWYOU"
2
-c -i 275.30.44.55 -n WYWYOU

# Check number of arguments
case $# in
         4|5) ;;
         *) usage; exit 1 ;;
esac

echo $# 
echo $* 
exit

[josephgr@oc0887178221 ~]$ ssh josephgr@freezer1 ./x.sh  "-i 275.30.44.55 -n WYWYOU"
josephgr@freezer1's password: 
4
-i 275.30.44.55 -n WYWYOU

#! /bin/ksh
args="$1"
IFS=" "
while : ; do
     print - "next: ${args%%${IFS}*}"
     if [ "$args" != "${args#*${IFS}}" ] ; then
          args="${args#*${IFS}}"
          print - "rest: $args"
     else
          print - "rest:"
          break
     fi
done

# ./split.ksh 'a     b c def g h'
next: a
rest:     b c def g h
next: 
rest:    b c def g h
next: 
rest:   b c def g h
next: 
rest:  b c def g h
next: 
rest: b c def g h
next: b
rest: c def g h
next: c
rest: def g h
next: def
rest: g h
next: g
rest: h
next: h
rest:

$ insert_host_ip.bash -i <ip> -n <name record> [-d] (to delete the record)

# Parse the arguments
while getopts i:n:R OPTION; do
  case "$OPTION" in
        D) REMOVE=Y
        ;;
        i) IP_ADDRESS=$OPTARG
        ;;
        n) NAME_RECORD=$OPTARG
        ;;
        :) usage ; exit 5
        ;;
        \?) usage ; exit 5
        ;;
  esac
done

shift $((OPTIND-1))