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OfflineIMAP makes messages and attachments available locally
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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)
