Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+.\"
+.\" Standard preamble:
+.\" ========================================================================
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+.\"
+.\" If the F register is >0, we'll generate index entries on stderr for
+.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
+.\" entries marked with X<> in POD.  Of course, you'll have to process the
+.\" output yourself in some meaningful fashion.
+.\"
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+.\" ========================================================================
+.\"
+.IX Title "SHASUM 1"
+.TH SHASUM 1 2023-12-15 "perl v5.38.2" "Perl Programmers Reference Guide"
+.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
+.\" way too many mistakes in technical documents.
+.if n .ad l
+.nh
+.SH NAME
+shasum \- Print or Check SHA Checksums
+.SH SYNOPSIS
+.IX Header "SYNOPSIS"
+.Vb 3
+\& Usage: shasum [OPTION]... [FILE]...
+\& Print or check SHA checksums.
+\& With no FILE, or when FILE is \-, read standard input.
+\&
+\&   \-a, \-\-algorithm   1 (default), 224, 256, 384, 512, 512224, 512256
+\&   \-b, \-\-binary      read in binary mode
+\&   \-c, \-\-check       read SHA sums from the FILEs and check them
+\&       \-\-tag         create a BSD\-style checksum
+\&   \-t, \-\-text        read in text mode (default)
+\&   \-U, \-\-UNIVERSAL   read in Universal Newlines mode
+\&                         produces same digest on Windows/Unix/Mac
+\&   \-0, \-\-01          read in BITS mode
+\&                         ASCII \*(Aq0\*(Aq interpreted as 0\-bit,
+\&                         ASCII \*(Aq1\*(Aq interpreted as 1\-bit,
+\&                         all other characters ignored
+\&
+\& The following five options are useful only when verifying checksums:
+\&       \-\-ignore\-missing  don\*(Aqt fail or report status for missing files
+\&   \-q, \-\-quiet           don\*(Aqt print OK for each successfully verified file
+\&   \-s, \-\-status          don\*(Aqt output anything, status code shows success
+\&       \-\-strict          exit non\-zero for improperly formatted checksum lines
+\&   \-w, \-\-warn            warn about improperly formatted checksum lines
+\&
+\&   \-h, \-\-help        display this help and exit
+\&   \-v, \-\-version     output version information and exit
+\&
+\& When verifying SHA\-512/224 or SHA\-512/256 checksums, indicate the
+\& algorithm explicitly using the \-a option, e.g.
+\&
+\&   shasum \-a 512224 \-c checksumfile
+\&
+\& The sums are computed as described in FIPS PUB 180\-4.  When checking,
+\& the input should be a former output of this program.  The default
+\& mode is to print a line with checksum, a character indicating type
+\& (\`*\*(Aq for binary, \` \*(Aq for text, \`U\*(Aq for UNIVERSAL, \`^\*(Aq for BITS),
+\& and name for each FILE.  The line starts with a \`\e\*(Aq character if the
+\& FILE name contains either newlines or backslashes, which are then
+\& replaced by the two\-character sequences \`\en\*(Aq and \`\e\e\*(Aq respectively.
+\&
+\& Report shasum bugs to mshelor@cpan.org
+.Ve
+.SH DESCRIPTION
+.IX Header "DESCRIPTION"
+Running \fIshasum\fR is often the quickest way to compute SHA message
+digests.  The user simply feeds data to the script through files or
+standard input, and then collects the results from standard output.
+.PP
+The following command shows how to compute digests for typical inputs
+such as the NIST test vector "abc":
+.PP
+.Vb 1
+\&        perl \-e "print qq(abc)" | shasum
+.Ve
+.PP
+Or, if you want to use SHA\-256 instead of the default SHA\-1, simply say:
+.PP
+.Vb 1
+\&        perl \-e "print qq(abc)" | shasum \-a 256
+.Ve
+.PP
+Since \fIshasum\fR mimics the behavior of the combined GNU \fIsha1sum\fR,
+\&\fIsha224sum\fR, \fIsha256sum\fR, \fIsha384sum\fR, and \fIsha512sum\fR programs,
+you can install this script as a convenient drop-in replacement.
+.PP
+Unlike the GNU programs, \fIshasum\fR encompasses the full SHA standard by
+allowing partial-byte inputs.  This is accomplished through the BITS
+option (\fI\-0\fR).  The following example computes the SHA\-224 digest of
+the 7\-bit message \fI0001100\fR:
+.PP
+.Vb 1
+\&        perl \-e "print qq(0001100)" | shasum \-0 \-a 224
+.Ve
+.SH AUTHOR
+.IX Header "AUTHOR"
+Copyright (C) 2003\-2023 Mark Shelor <mshelor@cpan.org>.
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fIshasum\fR is implemented using the Perl module Digest::SHA.