BASH

PRIMARY CATEGORY → SHELL SCRIPTING

• 
  • Globbing
• 
  • IFS
• 
  • Bash Versioning

$ nvim foo.bash

#!/usr/bin/env bash
 
bash()
{
        case $( /bin/ps -p "$PPID" -o comm= ) in
 
                *bash)  return 0
                        ;;
 
                *)      printf "Shell is not a Bash. Exiting...\n" 1>&2
                        return 1
                        ;;
        esac
}
 
bash || exit 99

$ chmod u+x foo.bash
$ dash -c './foo.bash'
Shell is not Bash. Exiting...