entries in the mailcap file

       run-mailcap   --action=ACTION   [--option[=value]]   [MIME-TYPE:[ENCOD-
       ING:]]FILE [...]

       The see, edit, compose and print versions are just aliases that default
       to the view, edit, compose, and print actions (respectively).

       run-mailcap (or any of its  aliases)  will  use  the  given  action  to
       process  each  mime-type/file  in  turn.  Each file is specified as its
       mime-type, its encoding (e.g. compression), and filename together, sep-
       arated by colons.  If the mime-type is omitted, an attempt to determine
       the type is made by trying to match the file's extension with those  in
       the  mime.types  files.   If  the  encoding is omitted, it will also be
       determined from the file's extensions.  Currently  supported  encodings
       are  gzip  (.gz), bzip (.bz), bzip2 (.bz2), and compress (.Z).  A file-
       name of "-" can be used to mean "standard input", but then a  mime-type
       must be specified.

       Both  the user's files (~/.mailcap; ~/.mime.types) and the system files
       (/etc/mailcap; /etc/mime.types) are searched in turn for information.

         see picture.jpg
         compose text/html:index.htm
         extract-mail-attachment msg.txt | see image/tiff:gzip:-

       All options are in the form --<opt>=<value>.

              Performs the specified action on the files.  Valid  actions  are
              view,  cat  (uses only "copiousoutput" rules and sends output to
              STDOUT) , compose, composetyped, edit and print.  If  no  action
              is  specified,  the action will be determined by how the program
              was called.

              Turns on extra information to find out what is happening.

              Ignores any "copiousoutput" directive and sends output  to  STD-

              Displays the found command without actually executing it.

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