chsh

#!/QOpenSys/pkgs/bin/bash

declare -a shell_list=("/QOpenSys/pkgs/bin/bash" "/QOpenSys/usr/bin/csh" "/QOpenSys/usr/bin/ksh" "/QOpenSys/usr/bin/psh" "/QOpenSys/usr/bin/sh" "/QOpenSys/usr/bin/bsh" "/QOpenSys/pkgs/bin/zsh" "/QOpenSys/pkgs/bin/csh" "/QOpenSys/pkgs/bin/tcsh")

USER=""
SHELL2SET=""

function usage {
    echo "chsh [-s shell] [-l] [-u] [-v] [username]" 
    exit 0
}

function list { 
    for i in "${shell_list[@]}"
    do
       echo "$i"
    done
    exit 0
}

function validate_shell {
    if [ ! -f "$1" ] ; then
    	echo "ERROR!! specified shell does not exist: $1" >&2
    	exit 8
    fi
    for i in "${shell_list[@]}"
    do
        if [ "$i" == "$1" ] ; then
            return 0
        fi
    done
    echo "ERROR!! specified shell not allowed: $1" >&2
    exit 7
}

while [[ $# -gt 0 ]]
do
arg="$1"
case $arg in
    -l)
        list
    ;;
    -u|-h)
        usage
    ;;
    -v|--version)
    LIBPATH="$2"
        echo "Version 1.0"
        exit 0
    ;;
    -s) 
        SHELL2SET="$2"
        shift
        shift
    ;;
    *)
        if [ -z "$USER" ]; 
        then
            USER="$1"
            shift
        else
            echo "ERROR!! Improper syntax" >&2
            echo "" >&2
            usage
        fi
    ;;
esac
done

if [ "$SHELL2SET" == "" ] ; then
    echo "ERROR!! Shell not specified." >&2
    exit 8
fi
if [ "$USER" == "" ] ; then
    USER="*CURRENT" #effectively making this an option parm, defaulting to *CURRENT
fi

if [[ "$SHELL2SET" != /* ]]; then
    SHELL2SET="/QOpenSys/pkgs/bin/$SHELL2SET"
fi
validate_shell "$SHELL2SET"

exec /usr/bin/qsh -c "/usr/bin/db2 \"CALL QSYS2.SET_PASE_SHELL_INFO('$USER', '$SHELL2SET')\" "