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- UUENCODE(5) UUENCODE(5)
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- NAME
- uuencode - format of an encoded uuencode file
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- DESCRIPTION
- Files output by uuencode(1) consist of a header line, fol-
- lowed by a number of body lines, and a trailer line. The
- uudecode(1) command will ignore any lines preceding the
- header or following the trailer. Lines preceding a header
- must not, of course, look like a header.
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- The header line is distinguished by having the first 6
- characters begin The word begin is followed by a mode (in
- octal), and a string which names the remote file. A space
- separates the three items in the header line.
-
- The body consists of a number of lines, each at most 62
- characters long (including the trailing newline). These
- consist of a character count, followed by encoded charac-
- ters, followed by a newline. The character count is a
- single printing character, and represents an integer, the
- number of bytes the rest of the line represents. Such
- integers are always in the range from 0 to 63 and can be
- determined by subtracting the character space (octal 40)
- from the character.
-
- Groups of 3 bytes are stored in 4 characters, 6 bits per
- character. All are offset by a space to make the charac-
- ters printing. The last line may be shorter than the nor-
- mal 45 bytes. If the size is not a multiple of 3, this
- fact can be determined by the value of the count on the
- last line. Extra garbage will be included to make the
- character count a multiple of 4. The body is terminated
- by a line with a count of zero. This line consists of one
- ASCII space.
-
- The trailer line consists of end on a line by itself.
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- SEE ALSO
- uuencode(1), uudecode(1), uusend(1), uucp(1), mail(1)
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- HISTORY
- The uuencode file format appeared in BSD 4.0 .
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