What is wrong in the Bash script about parameters and Wget?

Question

Runnning the command gives

wget_exam -h
Usage: wget_exam2 <fileType> <source>
exit     // then immediately Terminal shut dows

The code

# example wget_exam2 java http://www.example.com/ex_1
function wget_exam2 {
    while [[ $1 == -* ]]; do
    case "$1" in 
        -h|--help|-\? ) echo "Usage: wget_exam2 <fileType> <source>"; exit;;
            --) shift; break;;
        -*) echo "invalid option: $1"; echo "Usage: wget_exam2 <fileType> <source>"; exit;;
    esac
    done
    wget --random-wait -nd -r -p -A "$1" -e robots=off -U mozilla "$2"
}

Answer 1

If you are executing this function from a shell prompt, the exit command is telling the shell to exit rather than the function. You should probably use return instead.

You can use a return value with return and test for that in the script that calls the function and use the exit there to exit the script (or not depending on the return value).

$ testfunc(){ return ${1:-0}; }
$ testfunc
$ echo $?
0
$ testfunc 0
$ echo $?
0
$ testfunc 1
$ echo $?
1