public/subjects/devops/file-checker

file-checker

Instructions

In this exercise you will make a script file-checker.sh that will check the status of a given file using if statements.

Your script should make the following checks:

• File exists.

• File is readable.

• File is writable.

• File is executable.

It should output the status as in the example in the usage.

You should also handle what to do when no file is provided. The use of test command is not allowed for this exercise.

Usage

$ ./file-checker.sh file.txt
File exists
File is readable
File is not writable
File is not executable
$ ls -l file.txt
-r--r--r-- 1 user user 0 Jan 12 08:26 file.txt
$ ./file-checker.sh
Error: No file provided
$

Hints

bash conditional expressions can be used to solve this exercise. When using those expressions, you only need to take into account it's default behavior.

For example for script.sh:

#!/usr/bin/env bash

if [ -s $1] ; then
    echo "File size greater than 0"
fi

And its output:

$ ./script.sh file.txt
File size greater than 0
$