7e6cabd06e
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
103 lines
3.6 KiB
Groff
103 lines
3.6 KiB
Groff
.\" Copyright (c) 1989, 1991, 1993
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.\" The Regents of the University of California. 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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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)uuencode.format.5 8.2 (Berkeley) 1/12/94
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.\" $FreeBSD$
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.\"
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.Dd January 12, 1994
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.Dt UUENCODE 5
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.Os
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.Sh NAME
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.Nm uuencode
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.Nd format of an encoded uuencode file
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.Sh DESCRIPTION
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Files output by
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.Xr uuencode 1
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consist of a header line,
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followed by a number of body lines,
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and a trailer line.
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The
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.Xr uudecode 1
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command
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will ignore any lines preceding the header or
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following the trailer.
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Lines preceding a header must not, of course,
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look like a header.
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.Pp
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The header line is distinguished by having the first
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6 characters
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.Dq begin\ \&
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(note the trailing space).
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The word
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.Em begin
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is followed by a mode (in octal),
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and a string which names the remote file.
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A space separates the three items in the header line.
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.Pp
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The body consists of a number of lines, each at most 62 characters
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long (including the trailing newline).
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These consist of a character count,
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followed by encoded characters,
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followed by a newline.
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The character count is a single printing character,
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and represents an integer, the number of bytes
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the rest of the line represents.
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Such integers are always in the range from 1 to 45 or 64 and can
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be determined by subtracting the character space (octal 40)
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from the character.
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Character 64 represents a count of zero.
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.Pp
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Groups of 3 bytes are stored in 4 characters, 6 bits per character.
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All characters are always in range from 1 to 64 and are offset by a
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space (octal 40) to make the characters printing.
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Character
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64 represents a count of zero.
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The last line may be shorter than the normal 45 bytes.
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If the size is not a multiple of 3, this fact can be determined
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by the value of the count on the last line.
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Extra null characters will be included to make the character count a multiple
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of 4.
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The body is terminated by a line with a count of zero.
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This line consists of one
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.Tn ASCII
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backquote (octal 140) character.
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.Pp
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The trailer line consists of
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.Dq end
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on a line by itself.
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.Sh SEE ALSO
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.Xr mail 1 ,
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.Xr uucp 1 ,
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.Xr uudecode 1 ,
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.Xr uuencode 1
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.Sh HISTORY
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The
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.Nm
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file format appeared in
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.Bx 4.0 .
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.\" It was named uuencode.5 prior to 4.3
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