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class Xattr # :nodoc: all
module Lib
extend FFI::Library
ffi_lib "System"
attach_function :listxattr, [:string, :pointer, :size_t, :int], :ssize_t
attach_function :getxattr, [:string, :string, :pointer, :size_t, :uint, :int], :ssize_t
attach_function :setxattr, [:string, :string, :pointer, :size_t, :uint, :int], :int
attach_function :removexattr, [:string, :string, :int], :int
XATTR_NOFOLLOW = 0x0001
class << self
def list(path, no_follow)
options = no_follow ? XATTR_NOFOLLOW : 0
size = listxattr(path, nil, 0, options)
res_ptr = FFI::MemoryPointer.new(:pointer, size)
listxattr(path, res_ptr, size, options)
res_ptr.read_string(size).split("\000")
end
def get(path, no_follow, key)
options = no_follow ? XATTR_NOFOLLOW : 0
size = getxattr(path, key, nil, 0, 0, options)
return unless size > 0
str_ptr = FFI::MemoryPointer.new(:char, size)
getxattr(path, key, str_ptr, size, 0, options)
str_ptr.read_string(size)
end
def set(path, no_follow, key, value)
options = no_follow ? XATTR_NOFOLLOW : 0
Error.check setxattr(path, key, value, value.bytesize, 0, options)
end
def remove(path, no_follow, key)
options = no_follow ? XATTR_NOFOLLOW : 0
Error.check removexattr(path, key, options)
end
end
end
end
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