DragonFly On-Line Manual Pages
MMENCODE(1) DragonFly General Commands Manual MMENCODE(1)
NAME
mmencode - Translate to and from mail-oriented encoding formats
(Same program also installed as "mimencode".)
SYNOPSIS
mmencode[-u] [-b] [-q] [-p] [file name] [-o outputfile]
DESCRIPTION
The mmencode program simply converts a byte stream into (or out of) one
of the standard mail encoding formats defined by MIME, the proposed
standard for internet multimedia mail formats. Such an encoding is
necessary because binary data cannot be sent through the mail. The
encodings understood by mmencode are preferable to the use of the
uuencode/uudecode programs, for use in mail, in several respects that
were important to the authors of MIME.
By default, mmencode reads standard input, and sends a "base64" encoded
version of the input to standard output.
The (really not necessary) "-b" option tells mmencode to use the
"base64" encoding.
The "-q" option tells mmencode to use the "quoted-printable" encoding
instead of base64.
The "-u" option tells mmencode to decode the standard input rather than
encode it.
The "-p" option tells mmencode to translate decoded CRLF sequences into
the local newline convention during decoding and to do the reverse
during encoding. This option is only meaningful when -b (base64
encoding) is in effect.
If a file name argument is given, input is read from that file rather
than from standard input.
The "-o" option, which must be followed by a file name, sends output to
the named file rather than to standard output.
RATIONALE
Mmencode is intended to be a replacement for uuencode for mail and news
use. The reason is simple: uuencode doesn't work very well in a
number of circumstances and ways. In particular, uuencode uses
characters that don't translate well across all mail gateways
(particularly ASCII <-> EBCDIC gateways). Also, uuencode is not
standard -- there are several variants floating around, encoding and
decoding things in different and incompatible ways, with no "standard"
on which to base an implementation. Finally, uuencode does not
generally work well in a pipe, although some variants have been
modified to do so. Mmencode implements the encodings which were
defined for MIME as uuencode replacements, and should be considerably
more robust for email use.
SEE ALSO
metamail(1), mailto(1)
COPYRIGHT
Copyright (c) 1991 Bell Communications Research, Inc. (Bellcore)
Permission to use, copy, modify, and distribute this material for any
purpose and without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies, and
that the name of Bellcore not be used in advertising or publicity
pertaining to this material without the specific, prior written
permission of an authorized representative of Bellcore. BELLCORE MAKES
NO REPRESENTATIONS ABOUT THE ACCURACY OR SUITABILITY OF THIS MATERIAL
FOR ANY PURPOSE. IT IS PROVIDED "AS IS", WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES.
AUTHOR
Nathaniel S. Borenstein
Bellcore Prototype Release 1 MMENCODE(1)