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Samba HowTo Guide
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MIME Types and CUPS Filters

CUPS reads the file /etc/cups/mime.types (and all other files carrying a *.types suffix in the same directory) upon startup. These files contain the MIME type recognition rules that are applied when CUPS runs its autotyping routines. The rule syntax is explained in the man page for mime.types and in the comments section of the mime.types file itself. A simple rule reads like this:

application/pdf         pdf string(0,%PDF)

This means if a filename has a .pdf suffix or if the magic string %PDF is right at the beginning of the file itself (offset 0 from the start), then it is a PDF file ( application/pdf ). Another rule is this:

application/postscript  ai eps ps string(0,%!) string(0,<04>%!)

If the filename has one of the suffixes .ai, .eps, .ps, or if the file itself starts with one of the strings %! or <04>%! , it is a generic PostScript file ( application/postscript ).

Samba HowTo Guide
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