minix/external/bsd/file/dist/magic/magdir/msooxml
2012-06-18 10:53:30 +00:00

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#------------------------------------------------------------------------------
# $File: msooxml,v 1.1 2011/01/25 18:36:19 christos Exp $
# msooxml: file(1) magic for Microsoft Office XML
# From: Ralf Brown <ralf.brown@gmail.com>
# .docx, .pptx, and .xlsx are XML plus other files inside a ZIP
# archive. The first member file is normally "[Content_Types].xml".
# Since MSOOXML doesn't have anything like the uncompressed "mimetype"
# file of ePub or OpenDocument, we'll have to scan for a filename
# which can distinguish between the three types
# start by checking for ZIP local file header signature
0 string PK\003\004
# make sure the first file is correct
>0x1E string [Content_Types].xml
# skip to the second local file header
# since some documents include a 520-byte extra field following the file
# header, we need to scan for the next header
>>(18.l+49) search/2000 PK\003\004
# now skip to the *third* local file header; again, we need to scan due to a
# 520-byte extra field following the file header
>>>&26 search/1000 PK\003\004
# and check the subdirectory name to determine which type of OOXML
# file we have
>>>>&26 string word/ Microsoft Word 2007+
!:mime application/msword
>>>>&26 string ppt/ Microsoft PowerPoint 2007+
!:mime application/vnd.ms-powerpoint
>>>>&26 string xl/ Microsoft Excel 2007+
!:mime application/vnd.ms-excel
>>>>&26 default x Microsoft OOXML
!:strength +10