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NAME
     uuencode - format of an encoded uuencode file

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.

     The header line is distinguished by having the first 6 char-
     acters  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 sin-
     gle 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 characters
     printing.  The last line may be shorter than the  normal  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.

SEE ALSO
     uuencode(1), uudecode(1), uusend(1), uucp(1), mail(1)

HISTORY
     The uuencode file format appeared in BSD 4.0 .

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