54 lines
1.7 KiB
Groff
54 lines
1.7 KiB
Groff
'\"macro stdmacro
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.\" @(#)uuencode.5 6.1 (Berkeley) 5/15/85
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.\"
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.TH UUENCODE 4
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.AT 3
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.SH NAME
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uuencode \- format of an encoded uuencode file
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.SH DESCRIPTION
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Files output by
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.I uuencode(1C)
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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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.I Uudecode(1C)
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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 \*(lqbegin\ \*(rq.
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The word
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.I 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 0 to 63 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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.PP
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Groups of 3 bytes are stored in 4 characters, 6 bits per character.
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All are offset by a space to make the characters printing.
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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 garbage 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 ASCII space.
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.PP
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The trailer line consists of \*(lqend\*(rq on a line by itself.
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.SH "SEE ALSO"
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uuencode(1C), uudecode(1C), uucp(1C), mail(1)
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'\".so /pubs/tools/origin.bsd
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