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