1<!DOCTYPE HTML> 2<html> 3<!-- SECTION: Man Pages --> 4<head> 5 <link rel="stylesheet" type="text/css" href="../cups-printable.css"> 6 <title>mime.types(5)</title> 7</head> 8<body> 9<h1 class="title">mime.types(5)</h1> 10<h2 class="title"><a name="NAME">Name</a></h2> 11mime.types - mime type description file for cups 12<h2 class="title"><a name="DESCRIPTION">Description</a></h2> 13The <b>mime.types</b> file defines the recognized file types. 14<p>Additional file types are specified in files with the extension <i>.types</i> in the CUPS configuration directory. 15<p>Each line in the <b>mime.types</b> file is a comment, blank, or rule line. 16Comment lines start with the # character. 17Rule lines start with the MIME media type and are optionally followed by a series of file recognition rules: 18<pre class="man"> 19 20 <i>mime/type </i>[ <i>rule </i>... <i>rule </i>] 21 22</pre> 23Rules can be extended over multiple lines using the backslash character (\): 24<pre class="man"> 25 26 <i>mime/type </i>[ <i>really-really-really-long-rule </i>... <b>\ 27 </b><i>rule </i>] 28 29</pre> 30MIME media types specified by the <i>mime/type</i> field are case-insensitive and are sorted in ascending alphanumeric order for the purposes of matching. 31See the "TYPE MATCHING AND PRIORITY" section for more information. 32<p>The rules may be grouped using parenthesis, joined using "+" for a logical AND, joined using "," or whitespace for a logical OR, and negated using "!". 33<h3><a name="RULES">Rules</a></h3> 34Rules take two forms - a filename extension by itself and functions with test 35values inside parenthesis. 36The following functions are available: 37<dl class="man"> 38<dt><b>match("</b><i>pattern</i><b>")</b> 39<dd style="margin-left: 5.0em">True if the filename matches the given shell wildcard <i>pattern</i>. 40<dt><b>ascii(</b><i>offset</i><b>,</b><i>length</i><b>)</b> 41<dd style="margin-left: 5.0em">True if the <i>length</i> bytes starting at <i>offset</i> are valid printable ASCII (CR, NL, TAB, BS, 32-126). 42<dt><b>printable(</b><i>offset</i><b>,</b><i>length</i><b>)</b> 43<dd style="margin-left: 5.0em">True if the <i>length</i> bytes starting at <i>offset</i> are printable 8-bit chars (CR, NL, TAB, BS, 32-126, 128-254). 44<dt><b>priority(</b><i>number</i><b>)</b> 45<dd style="margin-left: 5.0em">Specifies the relative priority of this MIME media type. 46The default priority is 100. 47Larger values have higher priority while smaller values have lower priority. 48<dt><b>string(</b><i>offset</i><b>,"</b><i>string</i><b>")</b> 49<dd style="margin-left: 5.0em">True if the bytes starting at <i>offset</i> are identical to <i>string</i>. 50<dt><b>istring(</b><i>offset</i><b>,"</b><i>string</i><b>")</b> 51<dd style="margin-left: 5.0em">True if the bytes starting at <i>offset</i> match <i>string</i> without respect to case. 52<dt><b>char(</b><i>offset</i><b>,</b><i>value</i><b>)</b> 53<dd style="margin-left: 5.0em">True if the byte at <i>offset</i> is identical to <i>value</i>. 54<dt><b>short(</b><i>offset</i><b>,</b><i>value</i><b>)</b> 55<dd style="margin-left: 5.0em">True if the 16-bit big-endian integer at <i>offset</i> is identical to <i>value</i>. 56<dt><b>int(</b><i>offset</i><b>,</b><i>value</i><b>)</b> 57<dd style="margin-left: 5.0em">True if the 32-bit big-endian integer at <i>offset</i> is identical to <i>value</i>. 58<dt><b>locale("</b><i>string</i><b>")</b> 59<dd style="margin-left: 5.0em">True if current locale matches <i>string</i>. 60<dt><b>contains(</b><i>offset</i><b>,</b><i>range</i><b>,"</b><i>string</i><b>")</b> 61<dd style="margin-left: 5.0em">True if the bytes starting at <i>offset</i> for <i>range</i> bytes contains <i>string</i>. 62</dl> 63<h3><a name="STRING_CONSTANTS">String Constants</a></h3> 64String constants can be specified inside quotes ("") for strings containing whitespace and angle brackets (<>) for hexadecimal strings. 65<h3><a name="TYPE_MATCHING_AND_PRIORITY">Type Matching And Priority</a></h3> 66When CUPS needs to determine the MIME media type of a given file, it checks every MIME media type defined in the <i>.types</i> files. 67When two or more types match a given file, the type chosen will depend on the type name and priority, with higher-priority types being used over lower-priority ones. 68If the types have the same priority, the type names are sorted alphanumerically in ascending order and the first type is chosen. 69<p>For example, if two types "text/bar" and "text/foo" are defined as matching the 70extension "doc", normally the type "text/bar" will be chosen since its name is 71alphanumerically smaller than "text/foo". 72However, if "text/foo" also defines a higher priority than "text/bar", "text/foo" will be chosen instead. 73<h2 class="title"><a name="FILES">Files</a></h2> 74<i>/etc/cups</i> - Typical CUPS configuration directory. 75<h2 class="title"><a name="EXAMPLES">Examples</a></h2> 76Define two MIME media types for raster data, with one being a subset with higher priority: 77<pre class="man"> 78 79 application/vnd.cups-raster string(0,"RaSt") string(0,"tSaR") \ 80 string(0,"RaS2") string(0,"2SaR") \ 81 string(0,"RaS3") string(0,"3SaR") 82 83 image/pwg-raster string(0,"RaS2") + \ 84 string(4,PwgRaster<00>) priority(150) 85</pre> 86<h2 class="title"><a name="SEE_ALSO">See Also</a></h2> 87<b>cups-files.conf</b>(5), 88<b>cupsd.conf</b>(5), 89<b>cupsd</b>(8), 90<b>cupsfilter</b>(8), 91<b>mime.convs</b>(5), 92CUPS Online Help (<a href="http://localhost:631/help">http://localhost:631/help</a>) 93<h2 class="title"><a name="COPYRIGHT">Copyright</a></h2> 94Copyright © 2007-2019 by Apple Inc. 95 96</body> 97</html> 98