MirOS Manual: uuencode(5)

UUENCODE(5)                  BSD Reference Manual                  UUENCODE(5)

NAME

     uuencode - format of an encoded uuencode file

DESCRIPTION

     Files output by uuencode(1) consist of a header line, followed 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 characters
     "begin " (note the trailing space). 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 characters, 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 char-
     acter 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 con-
     sists of one ASCII ` (opening single quote) character.

     The trailer line consists of "end" on a line by itself.

SEE ALSO

     mail(1), uudecode(1), uuencode(1)

HISTORY

     The uuencode file format appeared in 4.0BSD.

MirOS BSD #10-current          January 12, 1994                              1

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