Long option parsing in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the first argument is the long option '--help'.

Bash Scripting

if [ "$1" = [1] ]; then
  echo "Help option selected"
fi

Drag options to blanks, or click blank then click option'

A"-h"

B"--help"

C"help"

D"--Help"

Attempts:

3 left

💡 Hint

Common Mistakes

Using single dash '-h' instead of double dash '--help'.

Forgetting to quote the option string.

The long option for help is '--help', so the code checks if the first argument equals '--help'.

2fill in blank

medium

Complete the code to use a case statement to handle the '--version' option.

Bash Scripting

case "$1" in
  [1])
    echo "Version 1.0"
    ;;
esac

Drag options to blanks, or click blank then click option'

A"--help"

B"version"

C"-v"

D"--version"

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-v' instead of '--version'.

Missing quotes around the option.

The case statement matches the '--version' long option to print the version info.

3fill in blank

hard

Fix the error in the code to correctly parse the '--output' option with a value.

Bash Scripting

if [[ $1 == [1] ]]; then
  output_file=$2
fi

Drag options to blanks, or click blank then click option'

A"--output"

B"-o"

C"output"

D"--Output"

Attempts:

3 left

💡 Hint

Common Mistakes

Using single dash '-o' instead of '--output'.

Using single brackets [ ] which do not support pattern matching.

The long option '--output' is matched with $1 to assign the next argument as the output file.

4fill in blank

hard

Fill both blanks to correctly parse '--file' option and assign its value.

Bash Scripting

if [[ $1 == [1] ]]; then
  file_name=[2]
fi

Drag options to blanks, or click blank then click option'

A"--file"

B$2

C$1

D"file"

Attempts:

3 left

💡 Hint

Common Mistakes

Assigning $1 instead of $2 as the file name.

Using single dash '-file' instead of '--file'.

The code checks if $1 is '--file' and assigns the next argument $2 to file_name.

5fill in blank

hard

Fill all three blanks to create a case statement that handles '--help', '--version', and '--output' options.

Bash Scripting

case "$1" in
  [1])
    echo "Show help"
    ;;
  [2])
    echo "Show version"
    ;;
  [3])
    echo "Output file: $2"
    ;;
esac

Drag options to blanks, or click blank then click option'

A"--help"

B"--version"

C"--output"

D"-o"

Attempts:

3 left

💡 Hint

Common Mistakes

Using '-o' instead of '--output'.

Mixing up option names or missing quotes.

The case statement matches '--help', '--version', and '--output' options to their respective actions.