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.Dd July 22, 2016
.Dt MSHOW 1
.Os
.Sh NAME
.Nm mshow
.Nd render mail and extract MIME parts
.Sh SYNOPSIS
.Nm
.Op Fl h Ar headers
.Op Fl A Ar mimetypes
.Op Fl qrHL
.Op Ar msgs\ ...
.Nm
.Fl x Ar msg
.Ar parts\ ...
.Nm
.Fl O Ar msg
.Ar parts\ ...
.Nm
.Fl t
.Ar msgs\ ...
.Nm
.Fl R
.Ar msg
.Sh DESCRIPTION
By default,
.Nm
renders the passed messages to standard output.
See
.Xr mmsg 7
for the message argument syntax.
If used interactively and no messages are given,
displays the current message.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl h Ar headers
Display the headers in the colon-separated list
.Ar headers
instead of the default headers
.Sq Li from:subject:to:cc:date: .
.It Fl A Ar mimetypes
Define
.Sq Li "mixed/alternative"
preference.
.Ar mimetypes
is a colon-separated list of
MIME types, the ones appearing first will
be preferred when rendering
.Sq Li "mixed/alternative"
parts.
If no MIME type matches, the first MIME part will be rendered.
.Pp
Defaults to
.Sq Li "text/plain:text/html" .
.It Fl q
Don't render the body, stop after header output.
.It Fl r
Don't render the body, print raw body.
This may be dangerous to use on a tty.
.It Fl H
Don't decode the headers, print all raw headers.
This may be dangerous to use on a tty.
.It Fl L
Don't filter the headers, print all decoded headers.
.It Fl x Ar msg
Switch to extraction mode: extract
.Ar parts
from the message
.Ar msg
into files.
.Ar parts
can be specified by number, file name or
.Xr fnmatch 3
pattern.
.It Fl O Ar msg
Like
.Fl x
but write to standard output.
This may be dangerous to use on a tty.
When used together with
.Fl r ,
the whole part is raw,
that is,
un-decoded and including MIME part headers.
.It Fl t
Switch to list mode: list all MIME parts
of each
.Ar msg .
.It Fl R Ar msg
Render the text parts from
.Ar msg ,
suitable for use in a reply.
.El
.Sh FILTERS
.Nm
by default decodes all
.Sq Li text/* ,
.Sq Li message/rfc822 ,
.Sq Li multipart/*
parts,
and re-encodes them into UTF-8 if necessary.
.Pp
Other filters can be specified in the file
.Pa ${MBLAZE:-$HOME/.mblaze}/filter
in the format
.D1 Ar type/subtype Ns Li \&: Ar command
or
.D1 Ar type Ns Li \&: Ar command
.Nm
will then spawn a pipe to
.Ar command ,
write the MIME part
and display the output.
The environment variable
.Ev PIPE_CHARSET
will be set to the charset declared in the MIME part,
if known.
.Sh EXIT STATUS
.Ex -std
.Sh SEE ALSO
.Xr mmsg 7
.Sh AUTHORS
.An Leah Neukirchen Aq Mt leah@vuxu.org
.Sh LICENSE
.Nm
is in the public domain.
.Pp
To the extent possible under law,
the creator of this work
has waived all copyright and related or
neighboring rights to this work.
.Pp
.Lk http://creativecommons.org/publicdomain/zero/1.0/
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