Ubuntu Manpage: update-mime - create or update MIME information

Provided by: mailcap_3.70+nmu1ubuntu1_all

NAME

       update-mime - create or update MIME information

SYNOPSIS

       update-mime [no parameters]

DESCRIPTION

       update-mime  updates the /etc/mailcap file to reflect mime information changed by a Debian package during
       installation or removal.

   OPTIONS
       --local Generate files in the current user's home directory instead of the /etc directory.   This  allows
       users  to  create  a custom ordering configuration and get a complete ~/.mailcap file out of it.  In this
       local mode, the order overriding file (see below) will be looked for in the ~/.mailcap.order file.

OVERRIDING ORDER

       The order of entries in the /etc/mailcap file can be altered  by  editing  the  /etc/mailcap.order  file.
       Please see the mailcap.order(5) man page for more information.

CREATING ENTRIES

To create entries in the mailcap file, packages need to create a file in the /usr/lib/mime/packages
directory. In this file goes the verbatim desired mailcap entries. In addition to the standard mailcap
options (described below) is a new priority option. Specifying this will provide for simple ranking of
programs within a given mime type. An animation viewer, for example, may be able to display a static
picture, but probably wouldn't be the best choice and so would give an option like "priority=2".
Priorities range from 0 to 9, with 0 being the lowest and 9 being the highest. If the priority option is
omitted, a value of 5 is used.

The following are standard options that can be specified in the mailcap entry. Options are separated by
semicolons (;) but must all be on the same line. Each line should look like:

mime/type; viewer; option; another=val; etc; priority=5

Mime types of the form "class/*" and even "*/*" are now acceptable (they were previously disallowed).
When using "class/*", it is probably a good idea to add a "priority=[1-4]" option so specific rules using
the default priority will get chosen first. If using "*/*", though, you probably want to add a
"priority=0" option to make that rule a "last resort".

Commands
<program-string>
Specifies the program to run to view a file of the given content-type. This option setting cannot
be omitted. An implicit "view=" can be considered before it. When writing an entry that has no
viewer, use a value of false in this space.

compose=<program-string>
The "compose" command may be used to specify a program that can be used to compose a new body or
body part in the given format. Its intended use is to support mail composing agents that support
the composition of multiple types of mail using external composing agents. The result of the
composing program may be data that is not yet suitable for mail transport -- that is, a Content-
Transfer-Encoding may need to be applied to the data.

composetyped=<program-string>
The "composetyped" command is similar to "compose", but is to be used when the composing program
needs to specify the Content-type header field to be applied to the composed data. The "compose"
option is simpler, and is preferred for use with existing (non-mail-oriented) programs for
composing data in a given format. The "composetyped" option is necessary when the Content-type
information must include auxiliary parameters, and the composition program must then know enough
about mail formats to produce output that includes the mail type information.

edit=<program-string>
The "edit" command may be used to specify a program that can be used to edit a body or body part
in the given format. In many cases, it may be identical in content to the "compose" command.

print=<program-string>
The "print" command may be used to specify a program that can be used to print a message or body
part in the given format.

Modifiers
These options are modifiers to all the commands specified on the command line.

test=<conditional>
The "test" option may be used to test some external condition (e.g., the machine architecture, or
the window system in use) to determine whether or not the mailcap line applies. It specifies a
program to be run to test some condition. If the test fails, a subsequent mailcap entry will be
sought. Multiple test options are not permitted -- since a test can call a program, it can
already be arbitrarily complex.

Note: When testing for X by looking at the DISPLAY environment variable, please use one of:

test=test -z "$DISPLAY" (no X)
or test=test -n "$DISPLAY" (have X)

Many programs recognize these strings and optimize for them.

needsterminal
The "needsterminal" option, if given, indicates that the commands must be run on an interactive
terminal. This is needed to inform window-oriented user agents that an interactive terminal is
needed. (The decision is not left exclusively to the command because in some circumstances it may
not be possible for such programs to tell whether or not they are on interactive terminals.) The
needsterminal command applies to the view, compose and edit commands, if they exist. Note that
this is NOT a test -- it is a requirement for the environment in which the program will be
executed, and will typically cause the creation of a terminal window when not executed on either a
real terminal or a terminal window.

copiousoutput
The "copiousoutput" option, if given, indicates that the output from the view-command will be an
extended stream of output and is to be interpreted as advice to the UA (User Agent mail-reading
program) that the output should be either paged or made scrollable. Note that it is probably a
mistake if needsterminal and copiousoutput are both specified.

Content-Type Info
These options provide additional information about the given content-type.

description=<string>
The "description" option simply provides a textual description that describes the type of data, to
be used optionally by mail readers that wish to describe the data before offering to display it.

textualnewlines
The "textualnewlines" option, if given, indicates that this type of data is line-oriented and
that, if encoded in a binary format, all newlines should be converted to canonical form (CRLF)
before encoding, and will be in that form after decoding. In general, this is needed only if
there is line-oriented data of some type other than text/* or non-line-oriented data that is a
subtype of text.

x11-bitmap=<pathname>
The "x11-bitmap" option names a file, in X11 bitmap (xbm) format, which points to an appropriate
icon to be used to visually denote the presence of this kind of data.

nametemplate=<string>
The "nametemplate" option gives a file name format, in which %s will be replaced by a short unique
string to give the name of the temporary file to be passed to the viewing command. This is only
expected to be relevant in environments where filename extensions are meaningful, e.g., one could
specify that a GIF file being passed to a gif viewer should have a name ending in ".gif" by using
"nametemplate=%s.gif".

DEPENDENCIES

       Packages that wish to provide MIME access to themselves should not depend on, recommend, or suggest mime-
       support, as the the file they create in /usr/lib/mime/packages will cause update-mime to be automatically
       run via a Dpkg trigger.

DESKTOP ENTRIES

       In  addition  to  the   abovementioned   mechanism   update-mime   also   parses   desktop   entries   in
       /usr/share/applications/ to generate mailcap entries. These entries are given a lower priority than those
       in /usr/lib/mime/packages.

AUTHOR

       update-mime was written by Brian White <bcwhite@pobox.com>

COPYRIGHT

       update-mime is in the public domain (the only true "free").