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17 lines
857 B
Plaintext
17 lines
857 B
Plaintext
This utility is a wrapper for the md5(3), sha1(3), rmd160(3), and
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tiger hash routines. It is remarkably similar to the digest package,
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except that it can recursively checksum directory trees.
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While a simple checksum on a tar file is usually satisfactory, once
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said archive has been extracted, it is virtually impossible to
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repackage the extracted tree in a form that can yield a repeatable
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checksum. To be specific, changes in timestamps and ownership, and
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changes in file ordering within directories can affect the checksum of
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the archive, while not really impacting the actual code at all.
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The algorithm used to checksum a directory in this implementation
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is considers only the files' pathnames, the files' types (ie,
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directory vs. file vs. symbolic link), and their contents (for
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the latter two). It is described in greater detail in the man
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page.
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