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UPDATE-MIME(8)               Update MIME Programs               UPDATE-MIME(8)

       update-mime - create or update MIME information

       update-mime [no parameters]

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

       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.

       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 verba-
       tim 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 pic-
       ture, 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  proba-
       bly  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".

              Specifies the program to run to view a file of  the  given  con-
              tent-type.  Actually, the "view=" must be omitted and the viewer
              program must be the second value on the  line  (after  the  mime
              type).   This  option  connot be omitted.  When writing an entry
              that has no viewer, use a value of false in this space.

              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  sup-
              port  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.

              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 "com-
              pose"  option is simpler, and is preferred for use with existing
              (non-mail-oriented) programs for composing data in a given  for-
              mat.   The  "composetyped" option is necessary when the Content-
              type information must include auxiliary parameters, and the com-
              position  program  must  then  know enough about mail formats to
              produce output that includes the mail type information.

              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.

              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.

       These  options  are modifiers to all the commands specified on the com-
       mand line.

              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.

              The  "needsterminal"  option,  if given, indicates that the com-
              mands 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  termi-
              nals.)   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 should typically cause the creation  of  a
              terminal window when not executed on either a real terminal or a
              terminal window.

              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-read-
              ing  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-

              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  dis-
              play it.

              The "textualnewlines" option, if given, indicates that this type
              of data is line-oriented and that, if encoded in a  binary  for-
              mat,  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.

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

              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".

       Packages  that  wish  to  provide  MIME access to themselves should not
       depend on, recommend, or suggest mime-support.   Instead,  they  should
       just  put  something  like  the  following  in  the postinst and postrm

           if [ -x /usr/sbin/update-mime ]; then

       mailcap.order(5), RFC-2046, RFC-1524

       update-mime was written by Brian White <bcwhiteATpobox.com>

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

Debian Project                   16th Aug 1998                  UPDATE-MIME(8)