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Annotation of src/usr.bin/uuencode/uuencode.5, Revision 1.9

1.9     ! millert     1: .\"    $OpenBSD: uuencode.5,v 1.8 2002/11/09 02:15:55 fgsch Exp $
1.1       deraadt     2: .\"    $NetBSD: uuencode.format.5,v 1.3 1994/11/17 07:39:45 jtc Exp $
                      3: .\"
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                      5: .\"    The Regents of the University of California.  All rights reserved.
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                     19: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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                     31: .\"    @(#)uuencode.format.5   8.2 (Berkeley) 1/12/94
                     32: .\"
                     33: .Dd January 12, 1994
                     34: .Dt UUENCODE 5
1.6       aaron      35: .Os
1.1       deraadt    36: .Sh NAME
                     37: .Nm uuencode
                     38: .Nd format of an encoded uuencode file
                     39: .Sh DESCRIPTION
                     40: Files output by
                     41: .Xr uuencode 1
                     42: consist of a header line,
                     43: followed by a number of body lines,
                     44: and a trailer line.
                     45: The
                     46: .Xr uudecode 1
                     47: command
                     48: will ignore any lines preceding the header or
                     49: following the trailer.
                     50: Lines preceding a header must not, of course,
                     51: look like a header.
                     52: .Pp
                     53: The header line is distinguished by having the first
                     54: 6 characters
                     55: .Dq begin\ \&
                     56: (note the trailing space).
                     57: The word
                     58: .Em begin
                     59: is followed by a mode (in octal),
                     60: and a string which names the remote file.
                     61: A space separates the three items in the header line.
                     62: .Pp
                     63: The body consists of a number of lines, each at most 62 characters
                     64: long (including the trailing newline).
                     65: These consist of a character count,
                     66: followed by encoded characters,
                     67: followed by a newline.
                     68: The character count is a single printing character,
                     69: and represents an integer, the number of bytes
                     70: the rest of the line represents.
                     71: Such integers are always in the range from 0 to 63 and can
                     72: be determined by subtracting the character space (octal 40)
                     73: from the character.
                     74: .Pp
                     75: Groups of 3 bytes are stored in 4 characters, 6 bits per character.
                     76: All are offset by a space to make the characters printing.
                     77: The last line may be shorter than the normal 45 bytes.
                     78: If the size is not a multiple of 3, this fact can be determined
                     79: by the value of the count on the last line.
                     80: Extra garbage will be included to make the character count a multiple
                     81: of 4.
                     82: The body is terminated by a line with a count of zero.
                     83: This line consists of one
                     84: .Tn ASCII
1.3       deraadt    85: \` (opening single quote) character.
1.1       deraadt    86: .Pp
                     87: The trailer line consists of
                     88: .Dq end
                     89: on a line by itself.
                     90: .Sh SEE ALSO
1.5       alex       91: .Xr mail 1 ,
1.4       aaron      92: .Xr uudecode 1 ,
1.5       alex       93: .Xr uuencode 1
1.1       deraadt    94: .Sh HISTORY
                     95: The
1.7       aaron      96: .Nm
1.1       deraadt    97: file format appeared in
                     98: .Bx 4.0 .
                     99: .\" It was named uuencode.5 prior to 4.3