mimecheck(1)						      Check MIME attachments						      mimecheck(1)

NAME

       mimecheck - determine the type of the MIME encoded of an attachment
       mimezip - detect the type of MIME encoded zip archive in an attachment
       mimebzip - detect the type of MIME encoded bzip2 data in an attachment
       mimegzip - detect the type of MIME encoded gzip data in an attachment

SYNOPSIS

       mimecheck boundary [file]
       mimezip boundary [file]
       mimebzip boundary [file]
       mimegzip boundary [file]

DESCRIPTION

       The scripts mimecheck, mimezip, mimebzip, and mimegzip can be used to determine the contents of MIME encoded attachments of the type appli-
       cation/octet-stream.  The scripts require the boundary as provided in the headers and/or bodys of mails	with  enclosed	attachments.   The
       scripts read from standard input if no file was provided and write out the detected MIME type to standard out.

EXAMPLE

       A short filter rule used by procmail(1) to check for DOS executables in MIME encoded zip archives found in many attachments:

	   BLANK="[  ]+"
	   TYPE="${BLANK}multipart/(alternative|mixed)"

	   :0
	   * $ ^Content-Type:${TYPE};(${BLANK}|$)*boundary=["']?[^ "';]+
	   {
		BOUNDARY="${MATCH}"
		TYPE=""

		:0 B
		   * $ ^Content-Transfer-Encoding:${BLANK}base64
		{
		     TYPE=`mimecheck ${BOUNDARY}`

		     :0
		     * TYPE ?? application/x-zip
		     {
			  TYPE=`mimezip ${BOUNDARY}`
		     }
		}

		:0
		* TYPE ?? executable.*DOS
		* TYPE ?? DOS.*executable
		/dev/null
	   }

       there is no guarantee that this piece of a procmailrc(5) file will work.

SEE ALSO

       procmailrc(5), file(1), sed(1), mimencode(1).

COPYRIGHT

       2007 SuSE LINUX Products GmbH, Nuernberg, Germany,
       2007 Werner Fink.

AUTHORS

       Werner Fink <werner@suse.de>.

3rd Berkeley Distribution					   Juni 28, 2007						      mimecheck(1)