Shell

some Bash snippets

Change Working Directory

Switch the Working Directory to the Base Path where the Scripts remains. Helpfull for Includes, Log Files, Relative Path and so on …

#!/usr/bin/env bash
script_path=$(dirname "$0")
cd "$script_path"

Check Return Code

Run a Command, store the Return Code, and check if it was successfull or failed

#!/usr/bin/env sh

check_ret () {
  if [[ "$ret" == "0" ]]; then
    echo "Command terminated sucessfully"
  else
    echo "Command returned an Error: ${ret}"
  fi
}

which bash > /dev/null 2>&1
ret=$?
check_ret $ret


which BASH > /dev/null 2>&1
ret=$?
check_ret $ret

exit 0

Source or Execute

You can Source a Script or Execute it. On Different Shells and on different Operation Systems.