90 lines
2.4 KiB
Text
90 lines
2.4 KiB
Text
$NetBSD: patch-ab,v 1.3 2005/03/31 05:02:24 atatat Exp $
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--- digest.1.orig 2005-03-30 23:40:39.000000000 -0500
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+++ digest.1
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@@ -2,5 +2,5 @@
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.\"
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.\"
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-.\" Copyright (c) 2001 Alistair G. Crooks. All rights reserved.
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+.\" Copyright (c) 2001-2005 Alistair G. Crooks. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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@@ -32,12 +32,13 @@
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.\"
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.\"
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-.Dd March 23, 2005
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-.Dt DIGEST 1
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+.Dd March 31, 2005
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+.Dt RDIGEST 1
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.Os
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.Sh NAME
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-.Nm digest
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-.Nd calculate message digests
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+.Nm rdigest
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+.Nd calculate message digests of files and directories
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.Sh SYNOPSIS
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.Nm
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+.Op Fl x Ar directory
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.Ar algorithm
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.Op file ...
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@@ -45,6 +46,13 @@
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The
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.Nm
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-utility calculates message digests of files or,
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+utility calculates message digests of files, directories, or,
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if no file is specified, standard input.
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+The
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+.Fl x
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+option can be used as many times as required to indicate directories
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+not to be included in a directory's hash.
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+This allows you to skip, eg, CVS subdirectories in a given tree, which
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+can have relatively volatile contents not pertinent to the hash.
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+.Pp
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The list of possible algorithms is:
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.Bl -tag -width Ds
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@@ -89,4 +97,23 @@ algorithm implementations, which are loc
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C library, and was designed to be scalable as new message digest
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algorithms are developed.
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+The checksum for a directory is implemented as the hash over a list of
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+one or two hashes for each of the items in the tree.
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+.Bl -bullet
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+.It
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+For a file, the string
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+.Dq f \&
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+along with the path make up the data for one hash, and the contents of
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+the file is used for the second hash.
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+.It
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+For a symbolic link, the string
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+.Dq l \&
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+along with the path to the symbolic link make up the data for one
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+hash, and the target of the symbolic link is used for the second hash.
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+.It
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+For a directory, the string
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+.Dq d \&
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+along with the path make up the data for one hash.
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+There is no second hash for a directory.
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+.El
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.Pp
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The
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@@ -95,4 +122,5 @@ utility exits 0 on success, and \*[Gt]0
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.Sh SEE ALSO
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.Xr cksum 1 ,
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+.Xr digest 1 ,
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.Xr md5 3 ,
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.Xr rmd160 3 ,
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@@ -102,8 +130,12 @@ The
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.Nm
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utility first appeared in
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-.Nx 1.6 .
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+.Nx 2.0 .
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.Sh AUTHORS
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The
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+.Xr digest 1
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+utility was written by Alistair G. Crooks \*[Lt]agc@netbsd.org\*[Gt].
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.Nm
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-utility was written by
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-.An Alistair G. Crooks Aq agc@netbsd.org .
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+was implemented by Andrew Brown \*[Lt]atatat@netbsd.org\*[Gt] as a
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+patch to
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+.Xr digest 1
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+to add recursive capabilities.
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