45 lines
1.2 KiB
Ruby
45 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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module BSD
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end unless defined?(BSD)
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module BSD::Capsicum
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require_relative "capsicum/version"
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require_relative "capsicum/libc"
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extend self
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##
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# Check if we're in capability mode.
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#
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# @see https://man.freebsd.org/cgi/man.cgi?query=cap_getmode&apropos=0&sektion=2&format=html cap_getmode(2)
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# @raise [SystemCallError]
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# Might raise a subclass of SystemCallError
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# @return [Boolean]
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# Returns true when the current process is in capability mode
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def in_capability_mode?
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uintp = Fiddle::Pointer.malloc(Fiddle::SIZEOF_UINT)
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ret = LibC.cap_getmode(uintp)
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if ret == 0
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uintp[0, Fiddle::SIZEOF_UINT].unpack("i") == [1]
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else
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raise SystemCallError.new("cap_getmode", Fiddle.last_error)
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end
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ensure
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uintp.call_free
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end
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alias_method :capability_mode?, :in_capability_mode?
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##
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# Enter a process into capability mode
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#
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# @see https://man.freebsd.org/cgi/man.cgi?query=cap_enter&apropos=0&sektion=2&format=html cap_enter(2)
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# @raise [SystemCallError]
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# Might raise a subclass of SystemCallError
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# @return [Boolean]
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# Returns true when successful
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def enter!
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return true unless LibC.cap_enter == -1
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raise SystemCallError.new("cap_enter", Fiddle.last_error)
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end
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end
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