de0b93f912
- atomic_write: close file before renaming to prevent error: 'Device or resource busy' - ensure_writable: preserve executable bit - new elf? and dynamic? methods
20 lines
546 B
Ruby
20 lines
546 B
Ruby
class Pathname
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# @private
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def elf?
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# See: https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
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read(4) == "\x7fELF"
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end
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# @private
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def dynamic_elf?
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if which "readelf"
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popen_read("readelf", "-l", to_path).include?(" DYNAMIC ")
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elsif which "file"
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!popen_read("file", "-L", "-b", to_path)[/dynamic|shared/].nil?
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else
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raise StandardError, "Neither `readelf` nor `file` is available "\
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"to determine whether '#{self}' is dynamically or statically linked."
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end
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end
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end
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