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tnef (1)
>> tnef (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
NAME
tnef - decode Microsoft's Transport Neutral Encapsulaton Format
SYNOPSIS
tnef [options] [FILE]
tnef
{--help | --version}
DESCRIPTION
This manual page documents the
tnef
filter.
tnef
decodes e-mail attachments encoded in Microsoft's Transport Neutral
Encapsulation Format (hereafter, TNEF), which "wraps"
Microsoft e-mail messages composed in Rich Text Format (RTF).
Unfortunately,
RTF-rendered attachments are inaccessible
to any e-mail client that does not understand TNEF.
Fortunately,
the
tnef
filter can be used by any MIME-aware client to decode these attachments.
OPTIONS
-C DIR, --directory=DIR
unpack file attachments into DIR.
-f FILE, --file=FILE
use FILE as input ('-' denotes stdin). When this option is omitted,
tnef
reads data from stdin.
--number-backups
when extracting attachments, if file FOO will be overwritten,
create FOO.1 instead.
--overwrite
when extracting attachments, overwrite existing files.
-t, --list
list attached files, do not extract.
--use-paths
honor file pathnames specifieid in the TNEF attachment.
For security reasons, paths to attached files are
ignored by default.
-w, --interactive, --confirmation
ask for confirmation for every action.
--debug
enable debug output.
-v, --verbose
produce verbose output.
EXAMPLE
The following example demonstrates typical
tnef
usage with a popular Unix mail client called "mutt".
Step 1 -- Configure ~/.mailcap
Mutt can't use
tnef
for its intended purpose until an appropriate content type definition
exists in ~/.mailcap . Here's a sample definition:
application/ms-tnef; tnef -w %s
This mailcap entry says that whenever the MIME content type:
application/ms-tnef
is encountered, use this command to decode it:
tnef -w %s
The latter command string invokes
tnef,
specifying both the -w option and the attachment (created as a
temporary file) as command line arguments.
Step 2 -- Add The Filter To $PATH
Mutt can't invoke
tnef
if the filter isn't accessible via $PATH.
Step 3 -- Test Mutt
Use mutt to read a message that includes a TNEF attachment. Mutt will
note that an attachment of type "application/ms-tnef is unsupported".
Press the "v" key to open mutt's "view attachment" menu.
Move the cursor over the TNEF attachment and press the enter key to "view"
the attachment.
Mutt will launch
tnef
and invoke it
using the command line syntax specified in ~/.mailcap (step 1).
tnef
then decodes all file(s) included in the TNEF attachment, prompting
for confirmation prior to creating an individual file (refer to
-w
option above).
-w
is useful here because it gives the end user a chance to
view the filename(s) included in the mail message.
Note that Mutt's attachment menu also supports a pipe option, which permits
the user to pipe attachments to an external filter (how convenient).
So, to list the contents of a TNEF attachment prior to decoding it, press
the "|" key and enter this command:
