attrs

attr.sh

#!/usr/bin/env sh
# This script is recursive by default
# Adapted from https://github.com/just-containers/s6-overlay/issues/146#issuecomment-256545379

if [ $# -eq 0 ]; then
  echo "No arguments supplied"
  echo ""
  echo "Usage: "
  echo "  attr /path/to true||false root||root:root 0777||false [0777||false]"
  echo "Example: "
  echo "  attr /path/to true root:root 0777 0777"
  echo ""
  echo "Script is recursive by default, and recursion cannot be disabled (not implemented)"
  exit 1
fi

# Arguments. Simple handling.
TARGET_PATH=${1:-}
RECURSIVE=${2:-}
OWNERSHIP=${3:-}
FMODE=${4:-}
DMODE=${5:-}

# Always required
if [ -z "${TARGET_PATH}" ]; then
  echo "InvalidArgumentError: Missing target path"
  exit 1
fi

# Always required
if [ -z "${OWNERSHIP}" ]; then
  echo "InvalidArgumentError: Missing ownership"
  exit 1
fi

# This is always required, regardless of target type, but it can be false to indicate only directory handling
if [ -z "${FMODE}" ]; then
  echo "InvalidArgumentError: Missing file chmod"
  exit 1
fi

# Argument is here even though not implemented, for the sake of compatibility with skarnet/s6 fix-attrs.d
if [ "${RECURSIVE}" = false ]; then
  echo "Warning: Disabling recursive mode is not supported yet"
fi

doChown() {
  if [ "${OWNERSHIP}" = false ]; then
    return 0
  fi

  if [ "${FMODE}" = false ]; then
    find "${TARGET_PATH}" -type d -exec chown "${OWNERSHIP}" {} \;
    return $?
  fi

  if [ -f "${TARGET_PATH}" ]; then
    chown "${OWNERSHIP}" "${TARGET_PATH}"
    return $?
  fi

  chown -hR "${OWNERSHIP}" "${TARGET_PATH}"
  return $?
}

doChmod() {
  if [ "${FMODE}" = false ] && [ "${DMODE}" = false ]; then
    return 0
  fi

  if [ -f "${TARGET_PATH}" ] && [ "${FMODE}" != false ]; then
    chmod "${FMODE}" "${TARGET_PATH}"
    return $?
  fi

  if [ "${DMODE}" != false ]; then
    find "${TARGET_PATH}" -type d -exec chmod "${DMODE}" {} \;
  fi
}

doChown
doChmod

Update: Development moved to separate repository https://github.com/N0rthernL1ghts/attr