bsdcapsicum.rb/lib/bsd/capsicum/ffi.rb

67 lines
1.5 KiB
Ruby

module BSD::Capsicum
module FFI
require "fiddle"
include Fiddle::Types
include Constants
module_function
##
# Provides a Ruby interface for cap_enter(2)
# @return [Integer]
def cap_enter
Fiddle::Function.new(
libc["cap_enter"],
[],
INT
).call
end
##
# Provides a Ruby interface for cap_getmode(2)
# @param [Fiddle::Pointer] uintp
# @return [Integer]
def cap_getmode(uintp)
Fiddle::Function.new(
libc["cap_getmode"],
[INTPTR_T],
INT
).call(uintp)
end
##
# Provides a Ruby interface for cap_rights_limit(2)
# @param [Integer] fd
# @param [Fiddle::Pointer] rights
# @return [Integer]
def cap_rights_limit(fd, rights)
Fiddle::Function.new(
libc["cap_rights_limit"],
[INT, VOIDP],
INT
).call(fd, rights)
end
##
# Provides a Ruby interface for cap_rights_init(2)
# @param [Array<Integer>] rights
# @return [Fiddle::Pointer]
def cap_rights_init(*rights)
voidp = Fiddle::Pointer.malloc(Fiddle::SIZEOF_VOIDP)
varargs = rights.flat_map { [ULONG_LONG, Symbol === _1 ? Constants.const_get(_1) : _1] }
Fiddle::Function.new(
libc["__cap_rights_init"],
[INT, VOIDP, VARIADIC],
VOIDP
).call(CAP_RIGHTS_VERSION, voidp, *varargs)
voidp
end
##
# @api private
def libc
@libc ||= Fiddle.dlopen Dir["/lib/libc.*"].first
end
end
private_constant :FFI
end