Class: Imap::Backup::Serializer::PermissionChecker

Inherits:
Object
  • Object
show all
Defined in:
lib/imap/backup/serializer/permission_checker.rb

Overview

Ensures a file has the desired permissions

Instance Method Summary collapse

Constructor Details

#initialize(filename:, limit:) ⇒ PermissionChecker

Returns a new instance of PermissionChecker.

Parameters:

  • filename (String) —

    the file name

  • limit (Integer) —

    the maximum permission that should be set



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# File 'lib/imap/backup/serializer/permission_checker.rb', line 12

def initialize(filename:, limit:)
  @filename = filename
  @limit = limit
end

Instance Method Details

#run ⇒ void

This method returns an undefined value.

Runs the check

Raises:

  • (RuntimeError) —

    if the permissions are incorrect



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# File 'lib/imap/backup/serializer/permission_checker.rb', line 20

def run
  actual = FileMode.new(filename: filename).mode
  return nil if actual.nil?

  mask = ~limit & 0o777
  return if (actual & mask).zero?

  message = format(
    "Permissions on '%<filename>s' " \
    "should be 0%<limit>o, not 0%<actual>o",
    filename: filename, limit: limit, actual: actual
  )
  raise message
end