Confirm a yes/no prompt

Print a message and return 0 on y/yes, 1 otherwise (default N).

18^th August 2026

confirm() {
  local answer
  printf "%s [y/N]: " "$1"
  read -r answer || true
  case "${answer}" in
    y|Y|yes|YES) return 0 ;;
    *) return 1 ;;
  esac
}

Caveats

Empty input or anything other than y/yes is treated as no.