bash script: how to test for parameter pairs?

Question

I have a bash script with command line params that may look like this:

./myscript.sh -P1 valueofP1 -A3 valueofA3

is there any common method of getting the values shown here and having local script variables P1 and A3 get the value that follows in the next parameter?

Comment by RM1970 is right on. Check out http://stackoverflow.com/questions/16483119/example-of-how-to-use-getopt-in-bash. — Skurfur, Nov 20 '13 at 17:01

score 1 · Accepted Answer · answered Nov 20 '13 at 16:59

shift

while [ $# -gt 0 ]
do
    case $1 in
    -P1)
        shift
        arg=$1
        shift
        echo "P1:$arg"
        ;;
    -A3)
        shift
        arg1=$1
        shift
        arg2=$1
        shift
        echo "A3: $arg1 and $arg2"
        ;;
    *)
        echo "Unknown argument $1" >&2
        exit 1
        ;;
    esac
done

usage:

$ ./test.sh -P1 AAA -A3 B C
P1:AAA
A3: B and C

bash script: how to test for parameter pairs?

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