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<!--
"$Id: api-cups.html 10909 2013-03-14 18:45:49Z mike $"
CUPS API header for CUPS.
Copyright 2008-2011 by Apple Inc.
These coded instructions, statements, and computer programs are the
property of Apple Inc. and are protected by Federal copyright
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<h1 class='title'>CUPS API</h1>
<div class='summary'><table summary='General Information'>
<thead>
<tr>
<th>Header</th>
<th>cups/cups.h</th>
</tr>
</thead>
<tbody>
<tr>
<th>Library</th>
<td>-lcups</td>
</tr>
<tr>
<th>See Also</th>
<td>Programming: <a href='api-overview.html' target='_top'>Introduction to CUPS Programming</a><br>
Programming: <a href='api-array.html' target='_top'>Array API</a><br>
Programming: <a href='api-filedir.html' target='_top'>File and Directory APIs</a><br>
Programming: <a href='api-filter.html' target='_top'>Filter and Backend Programming</a><br>
Programming: <a href='api-httpipp.html' target='_top'>HTTP and IPP APIs</a><br>
Programming: <a href='api-ppd.html' target='_top'>PPD API</a><br>
Programming: <a href='api-raster.html' target='_top'>Raster API</a></td>
</tr>
</tbody>
</table></div>
<h2 class="title">Contents</h2>
<ul class="contents">
<li><a href="#OVERVIEW">Overview</a><ul class="subcontents">
<li><a href="#CLIENTS_AND_SERVERS">Clients and Servers</a></li>
<li><a href="#PRINTERS_AND_CLASSES">Printers and Classes</a></li>
<li><a href="#OPTIONS">Options</a></li>
<li><a href="#PRINT_JOBS">Print Jobs</a></li>
<li><a href="#ERROR_HANDLING">Error Handling</a></li>
<li><a href="#PASSWORDS_AND_AUTHENTICATION">Passwords and Authentication</a></li>
</ul></li>
<li><a href="#FUNCTIONS">Functions</a><ul class="code">
<li><a href="#cupsAddDest" title="Add a destination to the list of destinations.">cupsAddDest</a></li>
<li><a href="#cupsAddOption" title="Add an option to an option array.">cupsAddOption</a></li>
<li><a href="#cupsAdminCreateWindowsPPD" title="Create the Windows PPD file for a printer.">cupsAdminCreateWindowsPPD</a></li>
<li><a href="#cupsAdminExportSamba" title="Export a printer to Samba.">cupsAdminExportSamba</a></li>
<li><a href="#cupsAdminGetServerSettings" title="Get settings from the server.">cupsAdminGetServerSettings</a></li>
<li><a href="#cupsAdminSetServerSettings" title="Set settings on the server.">cupsAdminSetServerSettings</a></li>
<li><a href="#cupsCancelDestJob" title="Include necessary headers...">cupsCancelDestJob</a></li>
<li><a href="#cupsCancelJob" title="Cancel a print job on the default server.">cupsCancelJob</a></li>
<li><a href="#cupsCancelJob2" title="Cancel or purge a print job.">cupsCancelJob2</a></li>
<li><a href="#cupsCheckDestSupported" title="Check that the option and value are supported
by the destination.">cupsCheckDestSupported</a></li>
<li><a href="#cupsCloseDestJob" title="Close a job and start printing.">cupsCloseDestJob</a></li>
<li><a href="#cupsConnectDest" title="Connect to the server for a destination.">cupsConnectDest</a></li>
<li><a href="#cupsConnectDestBlock" title="Connect to the server for a destination.">cupsConnectDestBlock</a></li>
<li><a href="#cupsCopyDest" title="Callback block">cupsCopyDest</a></li>
<li><a href="#cupsCopyDestConflicts" title="Get conflicts and resolutions for a new
option/value pair.">cupsCopyDestConflicts</a></li>
<li><a href="#cupsCopyDestInfo" title="Get the supported values/capabilities for the
destination.">cupsCopyDestInfo</a></li>
<li><a href="#cupsCreateDestJob" title="Create a job on a destination.">cupsCreateDestJob</a></li>
<li><a href="#cupsCreateJob" title="Create an empty job for streaming.">cupsCreateJob</a></li>
<li><a href="#cupsEncryption" title="Get the current encryption settings.">cupsEncryption</a></li>
<li><a href="#cupsEnumDests" title="Enumerate available destinations with a callback function.">cupsEnumDests</a></li>
<li><a href="#cupsEnumDestsBlock" title="Enumerate available destinations with a block.">cupsEnumDestsBlock</a></li>
<li><a href="#cupsFindDestDefault" title="Find the default value(s) for the given option.">cupsFindDestDefault</a></li>
<li><a href="#cupsFindDestReady" title="Find the default value(s) for the given option.">cupsFindDestReady</a></li>
<li><a href="#cupsFindDestSupported" title="Find the default value(s) for the given option.">cupsFindDestSupported</a></li>
<li><a href="#cupsFinishDestDocument" title="Finish the current document.">cupsFinishDestDocument</a></li>
<li><a href="#cupsFinishDocument" title="Finish sending a document.">cupsFinishDocument</a></li>
<li><a href="#cupsFreeDestInfo" title="Free destination information obtained using
cupsCopyDestInfo.">cupsFreeDestInfo</a></li>
<li><a href="#cupsFreeDests" title="Free the memory used by the list of destinations.">cupsFreeDests</a></li>
<li><a href="#cupsFreeJobs" title="Free memory used by job data.">cupsFreeJobs</a></li>
<li><a href="#cupsFreeOptions" title="Free all memory used by options.">cupsFreeOptions</a></li>
<li><a href="#cupsGetClasses" title="Get a list of printer classes from the default server.">cupsGetClasses</a></li>
<li><a href="#cupsGetDefault" title="Get the default printer or class for the default server.">cupsGetDefault</a></li>
<li><a href="#cupsGetDefault2" title="Get the default printer or class for the specified server.">cupsGetDefault2</a></li>
<li><a href="#cupsGetDest" title="Get the named destination from the list.">cupsGetDest</a></li>
<li><a href="#cupsGetDestMediaByIndex" title="Get a media name, dimension, and margins for a
specific size.">cupsGetDestMediaByIndex</a></li>
<li><a href="#cupsGetDestMediaByName" title="Get media names, dimensions, and margins.">cupsGetDestMediaByName</a></li>
<li><a href="#cupsGetDestMediaBySize" title="Get media names, dimensions, and margins.">cupsGetDestMediaBySize</a></li>
<li><a href="#cupsGetDestMediaCount" title="Get the number of sizes supported by a
destination.">cupsGetDestMediaCount</a></li>
<li><a href="#cupsGetDestMediaDefault" title="Get the default size for a destination.">cupsGetDestMediaDefault</a></li>
<li><a href="#cupsGetDests" title="Get the list of destinations from the default server.">cupsGetDests</a></li>
<li><a href="#cupsGetDests2" title="Get the list of destinations from the specified server.">cupsGetDests2</a></li>
<li><a href="#cupsGetJobs" title="Get the jobs from the default server.">cupsGetJobs</a></li>
<li><a href="#cupsGetJobs2" title="Get the jobs from the specified server.">cupsGetJobs2</a></li>
<li><a href="#cupsGetNamedDest" title="Get options for the named destination.">cupsGetNamedDest</a></li>
<li><a href="#cupsGetOption" title="Get an option value.">cupsGetOption</a></li>
<li><a href="#cupsGetPPD" title="Get the PPD file for a printer on the default server.">cupsGetPPD</a></li>
<li><a href="#cupsGetPPD2" title="Get the PPD file for a printer from the specified server.">cupsGetPPD2</a></li>
<li><a href="#cupsGetPPD3" title="Get the PPD file for a printer on the specified
server if it has changed.">cupsGetPPD3</a></li>
<li><a href="#cupsGetPassword" title="Get a password from the user.">cupsGetPassword</a></li>
<li><a href="#cupsGetPassword2" title="Get a password from the user using the advanced
password callback.">cupsGetPassword2</a></li>
<li><a href="#cupsGetPrinters" title="Get a list of printers from the default server.">cupsGetPrinters</a></li>
<li><a href="#cupsGetServerPPD" title="Get an available PPD file from the server.">cupsGetServerPPD</a></li>
<li><a href="#cupsLangDefault" title="Return the default language.">cupsLangDefault</a></li>
<li><a href="#cupsLangEncoding" title="Return the character encoding (us-ascii, etc.)
for the given language.">cupsLangEncoding</a></li>
<li><a href="#cupsLangFlush" title="Flush all language data out of the cache.">cupsLangFlush</a></li>
<li><a href="#cupsLangFree" title="Free language data.">cupsLangFree</a></li>
<li><a href="#cupsLangGet" title="Get a language.">cupsLangGet</a></li>
<li><a href="#cupsLocalizeDestOption" title="Get the localized string for a destination
option.">cupsLocalizeDestOption</a></li>
<li><a href="#cupsLocalizeDestValue" title="Get the localized string for a destination
option+value pair.">cupsLocalizeDestValue</a></li>
<li><a href="#cupsNotifySubject" title="Return the subject for the given notification message.">cupsNotifySubject</a></li>
<li><a href="#cupsNotifyText" title="Return the text for the given notification message.">cupsNotifyText</a></li>
<li><a href="#cupsParseOptions" title="Parse options from a command-line argument.">cupsParseOptions</a></li>
<li><a href="#cupsPrintFile" title="Print a file to a printer or class on the default server.">cupsPrintFile</a></li>
<li><a href="#cupsPrintFile2" title="Print a file to a printer or class on the specified
server.">cupsPrintFile2</a></li>
<li><a href="#cupsPrintFiles" title="Print one or more files to a printer or class on the
default server.">cupsPrintFiles</a></li>
<li><a href="#cupsPrintFiles2" title="Print one or more files to a printer or class on the
specified server.">cupsPrintFiles2</a></li>
<li><a href="#cupsRemoveDest" title="Remove a destination from the destination list.">cupsRemoveDest</a></li>
<li><a href="#cupsRemoveOption" title="Remove an option from an option array.">cupsRemoveOption</a></li>
<li><a href="#cupsServer" title="Return the hostname/address of the current server.">cupsServer</a></li>
<li><a href="#cupsSetClientCertCB" title="Set the client certificate callback.">cupsSetClientCertCB</a></li>
<li><a href="#cupsSetCredentials" title="Set the default credentials to be used for SSL/TLS
connections.">cupsSetCredentials</a></li>
<li><a href="#cupsSetDefaultDest" title="Set the default destination.">cupsSetDefaultDest</a></li>
<li><a href="#cupsSetDests" title="Save the list of destinations for the default server.">cupsSetDests</a></li>
<li><a href="#cupsSetDests2" title="Save the list of destinations for the specified server.">cupsSetDests2</a></li>
<li><a href="#cupsSetEncryption" title="Set the encryption preference.">cupsSetEncryption</a></li>
<li><a href="#cupsSetPasswordCB" title="Set the password callback for CUPS.">cupsSetPasswordCB</a></li>
<li><a href="#cupsSetPasswordCB2" title="Set the advanced password callback for CUPS.">cupsSetPasswordCB2</a></li>
<li><a href="#cupsSetServer" title="Set the default server name and port.">cupsSetServer</a></li>
<li><a href="#cupsSetServerCertCB" title="Set the server certificate callback.">cupsSetServerCertCB</a></li>
<li><a href="#cupsSetUser" title="Set the default user name.">cupsSetUser</a></li>
<li><a href="#cupsSetUserAgent" title="Set the default HTTP User-Agent string.">cupsSetUserAgent</a></li>
<li><a href="#cupsStartDestDocument" title="Start a new document.">cupsStartDestDocument</a></li>
<li><a href="#cupsStartDocument" title="Add a document to a job created with cupsCreateJob().">cupsStartDocument</a></li>
<li><a href="#cupsTempFd" title="Creates a temporary file.">cupsTempFd</a></li>
<li><a href="#cupsTempFile" title="Generates a temporary filename.">cupsTempFile</a></li>
<li><a href="#cupsTempFile2" title="Creates a temporary CUPS file.">cupsTempFile2</a></li>
<li><a href="#cupsUser" title="Return the current user's name.">cupsUser</a></li>
<li><a href="#cupsUserAgent" title="Return the default HTTP User-Agent string.">cupsUserAgent</a></li>
<li><a href="#pwgFormatSizeName" title="Generate a PWG self-describing media size name.">pwgFormatSizeName</a></li>
<li><a href="#pwgInitSize" title="Initialize a pwg_size_t structure using IPP Job Template
attributes.">pwgInitSize</a></li>
<li><a href="#pwgMediaForLegacy" title="Find a PWG media size by ISO/IPP legacy name.">pwgMediaForLegacy</a></li>
<li><a href="#pwgMediaForPPD" title="Find a PWG media size by Adobe PPD name.">pwgMediaForPPD</a></li>
<li><a href="#pwgMediaForPWG" title="Find a PWG media size by 5101.1 self-describing name.">pwgMediaForPWG</a></li>
<li><a href="#pwgMediaForSize" title="Get the PWG media size for the given dimensions.">pwgMediaForSize</a></li>
</ul></li>
<li><a href="#TYPES">Data Types</a><ul class="code">
<li><a href="#cups_client_cert_cb_t" title="Client credentials callback
">cups_client_cert_cb_t</a></li>
<li><a href="#cups_dest_block_t" title="Destination enumeration block
">cups_dest_block_t</a></li>
<li><a href="#cups_dest_cb_t" title="Destination enumeration callback
">cups_dest_cb_t</a></li>
<li><a href="#cups_dest_t" title="Destination">cups_dest_t</a></li>
<li><a href="#cups_device_cb_t" title="Device callback
">cups_device_cb_t</a></li>
<li><a href="#cups_dinfo_t" title="Destination capability and status
information ">cups_dinfo_t</a></li>
<li><a href="#cups_job_t" title="Job">cups_job_t</a></li>
<li><a href="#cups_option_t" title="Printer Options">cups_option_t</a></li>
<li><a href="#cups_password_cb2_t" title="New password callback
">cups_password_cb2_t</a></li>
<li><a href="#cups_password_cb_t" title="Password callback">cups_password_cb_t</a></li>
<li><a href="#cups_ptype_t" title="Printer type/capability bits">cups_ptype_t</a></li>
<li><a href="#cups_server_cert_cb_t" title="Server credentials callback
">cups_server_cert_cb_t</a></li>
<li><a href="#cups_size_t" title="Media Size ">cups_size_t</a></li>
<li><a href="#pwg_map_t" title="Map element - PPD to/from PWG">pwg_map_t</a></li>
<li><a href="#pwg_media_t" title="Common media size data">pwg_media_t</a></li>
<li><a href="#pwg_size_t" title="Size element - PPD to/from PWG">pwg_size_t</a></li>
</ul></li>
<li><a href="#STRUCTURES">Structures</a><ul class="code">
<li><a href="#cups_dest_s" title="Destination">cups_dest_s</a></li>
<li><a href="#cups_job_s" title="Job">cups_job_s</a></li>
<li><a href="#cups_option_s" title="Printer Options">cups_option_s</a></li>
<li><a href="#cups_size_s" title="Media Size ">cups_size_s</a></li>
<li><a href="#pollfd" title="User data (unused)">pollfd</a></li>
<li><a href="#pwg_map_s" title="Map element - PPD to/from PWG">pwg_map_s</a></li>
<li><a href="#pwg_media_s" title="Common media size data">pwg_media_s</a></li>
<li><a href="#pwg_size_s" title="Size element - PPD to/from PWG">pwg_size_s</a></li>
</ul></li>
<li><a href="#VARIABLES">Variables</a><ul class="code">
<li><a href="#CF_RETURNS_RETAINED" title="Get the Apple language identifier associated with a
locale ID.">CF_RETURNS_RETAINED</a></li>
</ul></li>
<li><a href="#ENUMERATIONS">Constants</a><ul class="code">
<li><a href="#cups_ptype_e" title="Printer type/capability bit
constants">cups_ptype_e</a></li>
</ul></li>
</ul>
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API introduction for CUPS.
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<h2 class='title'><a name='OVERVIEW'>Overview</a></h2>
<p>The CUPS API provides the convenience functions needed to support
applications, filters, printer drivers, and backends that need to interface
with the CUPS scheduler.</p>
<h3><a name='CLIENTS_AND_SERVERS'>Clients and Servers</a></h3>
<p>CUPS is based on the Internet Printing Protocol ("IPP"), which allows
clients (applications) to communicate with a server (the scheduler) to get a
list of printers, send print jobs, and so forth. You identify which server
you want to communicate with using a pointer to the opaque structure
<code>http_t</code>. All of the examples in this document use the
<code>CUPS_HTTP_DEFAULT</code> constant, referring to the default connection
to the scheduler. The <a href='api-httpipp.html' target='_top'>HTTP and IPP
APIs</a> document provides more information on server connections.</p>
<h3><a name='PRINTERS_AND_CLASSES'>Printers and Classes</a></h3>
<p>Printers and classes (collections of printers) are accessed through
the <a href="#cups_dest_t"><code>cups_dest_t</code></a> structure which
includes the name (<code>name</code>), instance (<code>instance</code> -
a way of selecting certain saved options/settings), and the options and
attributes associated with that destination (<code>num_options</code> and
<code>options</code>). Destinations are created using the
<a href="#cupsGetDests"><code>cupsGetDests</code></a> function and freed
using the <a href='#cupsFreeDests'><code>cupsFreeDests</code></a> function.
The <a href='#cupsGetDest'><code>cupsGetDest</code></a> function finds a
specific destination for printing:</p>
<pre class='example'>
#include <cups/cups.h>
<a href='#cups_dest_t'>cups_dest_t</a> *dests;
int num_dests = <a href='#cupsGetDests'>cupsGetDests</a>(&dests);
<a href='#cups_dest_t'>cups_dest_t</a> *dest = <a href='#cupsGetDest'>cupsGetDest</a>("name", NULL, num_dests, dests);
/* do something with dest */
<a href='#cupsFreeDests'>cupsFreeDests</a>(num_dests, dests);
</pre>
<p>Passing <code>NULL</code> to
<a href='#cupsGetDest'><code>cupsGetDest</code></a> for the destination name
will return the default destination. Similarly, passing a <code>NULL</code>
instance will return the default instance for that destination.</p>
<div class='table'><table summary='Table 1: Printer Attributes' width='80%'>
<caption>Table 1: <a name='TABLE1'>Printer Attributes</a></caption>
<thead>
<tr>
<th>Attribute Name</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>"auth-info-required"</td>
<td>The type of authentication required for printing to this
destination: "none", "username,password", "domain,username,password",
or "negotiate" (Kerberos)</td>
</tr>
<tr>
<td>"printer-info"</td>
<td>The human-readable description of the destination such as "My
Laser Printer".</td>
</tr>
<tr>
<td>"printer-is-accepting-jobs"</td>
<td>"true" if the destination is accepting new jobs, "false" if
not.</td>
</tr>
<tr>
<td>"printer-is-shared"</td>
<td>"true" if the destination is being shared with other computers,
"false" if not.</td>
</tr>
<tr>
<td>"printer-location"</td>
<td>The human-readable location of the destination such as "Lab 4".</td>
</tr>
<tr>
<td>"printer-make-and-model"</td>
<td>The human-readable make and model of the destination such as "HP
LaserJet 4000 Series".</td>
</tr>
<tr>
<td>"printer-state"</td>
<td>"3" if the destination is idle, "4" if the destination is printing
a job, and "5" if the destination is stopped.</td>
</tr>
<tr>
<td>"printer-state-change-time"</td>
<td>The UNIX time when the destination entered the current state.</td>
</tr>
<tr>
<td>"printer-state-reasons"</td>
<td>Additional comma-delimited state keywords for the destination
such as "media-tray-empty-error" and "toner-low-warning".</td>
</tr>
<tr>
<td>"printer-type"</td>
<td>The <a href='#cups_printer_t'><code>cups_printer_t</code></a>
value associated with the destination.</td>
</tr>
</tbody>
</table></div>
<h3><a name='OPTIONS'>Options</a></h3>
<p>Options are stored in arrays of
<a href='#cups_option_t'><code>cups_option_t</code></a> structures. Each
option has a name (<code>name</code>) and value (<code>value</code>)
associated with it. The <a href='#cups_dest_t'><code>cups_dest_t</code></a>
<code>num_options</code> and <code>options</code> members contain the
default options for a particular destination, along with several informational
attributes about the destination as shown in <a href='#TABLE1'>Table 1</a>.
The <a href='#cupsGetOption'><code>cupsGetOption</code></a> function gets
the value for the named option. For example, the following code lists the
available destinations and their human-readable descriptions:</p>
<pre class='example'>
#include <cups/cups.h>
<a href='#cups_dest_t'>cups_dest_t</a> *dests;
int num_dests = <a href='#cupsGetDests'>cupsGetDests</a>(&dests);
<a href='#cups_dest_t'>cups_dest_t</a> *dest;
int i;
const char *value;
for (i = num_dests, dest = dests; i > 0; i --, dest ++)
if (dest->instance == NULL)
{
value = <a href='#cupsGetOption'>cupsGetOption</a>("printer-info", dest->num_options, dest->options);
printf("%s (%s)\n", dest->name, value ? value : "no description");
}
<a href='#cupsFreeDests'>cupsFreeDests</a>(num_dests, dests);
</pre>
<p>You can create your own option arrays using the
<a href='#cupsAddOption'><code>cupsAddOption</code></a> function, which
adds a single named option to an array:</p>
<pre class='example'>
#include <cups/cups.h>
int num_options = 0;
<a href='#cups_option_t'>cups_option_t</a> *options = NULL;
/* The returned num_options value is updated as needed */
num_options = <a href='#cupsAddOption'>cupsAddOption</a>("first", "value", num_options, &options);
/* This adds a second option value */
num_options = <a href='#cupsAddOption'>cupsAddOption</a>("second", "value", num_options, &options);
/* This replaces the first option we added */
num_options = <a href='#cupsAddOption'>cupsAddOption</a>("first", "new value", num_options, &options);
</pre>
<p>Use a <code>for</code> loop to copy the options from a destination:</p>
<pre class='example'>
#include <cups/cups.h>
int i;
int num_options = 0;
<a href='#cups_option_t'>cups_option_t</a> *options = NULL;
<a href='#cups_dest_t'>cups_dest_t</a> *dest;
for (i = 0; i < dest->num_options; i ++)
num_options = <a href='#cupsAddOption'>cupsAddOption</a>(dest->options[i].name, dest->options[i].value,
num_options, &options);
</pre>
<p>Use the <a href='#cupsFreeOptions'><code>cupsFreeOptions</code></a>
function to free the options array when you are done using it:</p>
<pre class='example'>
<a href='#cupsFreeOptions'>cupsFreeOptions</a>(num_options, options);
</pre>
<h3><a name='PRINT_JOBS'>Print Jobs</a></h3>
<p>Print jobs are identified by a locally-unique job ID number from 1 to
2<sup>31</sup>-1 and have options and one or more files for printing to a
single destination. The <a href='#cupsPrintFile'><code>cupsPrintFile</code></a>
function creates a new job with one file. The following code prints the CUPS
test page file:</p>
<pre class='example'>
#include <cups/cups.h>
<a href='#cups_dest_t'>cups_dest_t</a> *dest;
int num_options;
<a href='#cups_option_t'>cups_option_t</a> *options;
int job_id;
/* Print a single file */
job_id = <a href='#cupsPrintFile'>cupsPrintFile</a>(dest->name, "/usr/share/cups/data/testprint.ps",
"Test Print", num_options, options);
</pre>
<p>The <a href='#cupsPrintFiles'><code>cupsPrintFiles</code></a> function
creates a job with multiple files. The files are provided in a
<code>char *</code> array:</p>
<pre class='example'>
#include <cups/cups.h>
<a href='#cups_dest_t'>cups_dest_t</a> *dest;
int num_options;
<a href='#cups_option_t'>cups_option_t</a> *options;
int job_id;
char *files[3] = { "file1.pdf", "file2.pdf", "file3.pdf" };
/* Print three files */
job_id = <a href='#cupsPrintFiles'>cupsPrintFiles</a>(dest->name, 3, files, "Test Print", num_options, options);
</pre>
<p>Finally, the <a href='#cupsCreateJob'><code>cupsCreateJob</code></a>
function creates a new job with no files in it. Files are added using the
<a href='#cupsStartDocument'><code>cupsStartDocument</code></a>,
<a href='api-httpipp.html#cupsWriteRequestData'><code>cupsWriteRequestData</code></a>,
and <a href='#cupsFinishDocument'><code>cupsFinishDocument</code></a> functions.
The following example creates a job with 10 text files for printing:</p>
<pre class='example'>
#include <cups/cups.h>
<a href='#cups_dest_t'>cups_dest_t</a> *dest;
int num_options;
<a href='#cups_option_t'>cups_option_t</a> *options;
int job_id;
int i;
char buffer[1024];
/* Create the job */
job_id = <a href='#cupsCreateJob'>cupsCreateJob</a>(CUPS_HTTP_DEFAULT, dest->name, "10 Text Files",
num_options, options);
/* If the job is created, add 10 files */
if (job_id > 0)
{
for (i = 1; i <= 10; i ++)
{
snprintf(buffer, sizeof(buffer), "file%d.txt", i);
<a href='#cupsStartDocument'>cupsStartDocument</a>(CUPS_HTTP_DEFAULT, dest->name, job_id, buffer,
CUPS_FORMAT_TEXT, i == 10);
snprintf(buffer, sizeof(buffer),
"File %d\n"
"\n"
"One fish,\n"
"Two fish,\n
"Red fish,\n
"Blue fish\n", i);
/* cupsWriteRequestData can be called as many times as needed */
<a href='#cupsWriteRequestData'>cupsWriteRequestData</a>(CUPS_HTTP_DEFAULT, buffer, strlen(buffer));
<a href='#cupsFinishDocument'>cupsFinishDocument</a>(CUPS_HTTP_DEFAULT, dest->name);
}
}
</pre>
<p>Once you have created a job, you can monitor its status using the
<a href='#cupsGetJobs'><code>cupsGetJobs</code></a> function, which returns
an array of <a href='#cups_job_t'><code>cups_job_t</code></a> structures.
Each contains the job ID (<code>id</code>), destination name
(<code>dest</code>), title (<code>title</code>), and other information
associated with the job. The job array is freed using the
<a href='#cupsFreeJobs'><code>cupsFreeJobs</code></a> function. The following
example monitors a specific job ID, showing the current job state once every
5 seconds until the job is completed:</p>
<pre class='example'>
#include <cups/cups.h>
<a href='#cups_dest_t'>cups_dest_t</a> *dest;
int job_id;
int num_jobs;
<a href='#cups_job_t'>cups_job_t</a> *jobs;
int i;
ipp_jstate_t job_state = IPP_JOB_PENDING;
while (job_state < IPP_JOB_STOPPED)
{
/* Get my jobs (1) with any state (-1) */
num_jobs = <a href='#cupsGetJobs'>cupsGetJobs</a>(&jobs, dest->name, 1, -1);
/* Loop to find my job */
job_state = IPP_JOB_COMPLETED;
for (i = 0; i < num_jobs; i ++)
if (jobs[i].id == job_id)
{
job_state = jobs[i].state;
break;
}
/* Free the job array */
<a href='#cupsFreeJobs'>cupsFreeJobs</a>(num_jobs, jobs);
/* Show the current state */
switch (job_state)
{
case IPP_JOB_PENDING :
printf("Job %d is pending.\n", job_id);
break;
case IPP_JOB_HELD :
printf("Job %d is held.\n", job_id);
break;
case IPP_JOB_PROCESSING :
printf("Job %d is processing.\n", job_id);
break;
case IPP_JOB_STOPPED :
printf("Job %d is stopped.\n", job_id);
break;
case IPP_JOB_CANCELED :
printf("Job %d is canceled.\n", job_id);
break;
case IPP_JOB_ABORTED :
printf("Job %d is aborted.\n", job_id);
break;
case IPP_JOB_COMPLETED :
printf("Job %d is completed.\n", job_id);
break;
}
/* Sleep if the job is not finished */
if (job_state < IPP_JOB_STOPPED)
sleep(5);
}
</pre>
<p>To cancel a job, use the
<a href='#cupsCancelJob'><code>cupsCancelJob</code></a> function with the
job ID:</p>
<pre class='example'>
#include <cups/cups.h>
<a href='#cups_dest_t'>cups_dest_t</a> *dest;
int job_id;
<a href='#cupsCancelJob'>cupsCancelJob</a>(dest->name, job_id);
</pre>
<h3><a name='ERROR_HANDLING'>Error Handling</a></h3>
<p>If any of the CUPS API printing functions returns an error, the reason for
that error can be found by calling the
<a href='#cupsLastError'><code>cupsLastError</code></a> and
<a href='#cupsLastErrorString'><code>cupsLastErrorString</code></a> functions.
<a href='#cupsLastError'><code>cupsLastError</code></a> returns the last IPP
error code
(<a href='api-httpipp.html#ipp_status_t'><code>ipp_status_t</code></a>)
that was encountered, while
<a href='#cupsLastErrorString'><code>cupsLastErrorString</code></a> returns
a (localized) human-readable string that can be shown to the user. For example,
if any of the job creation functions returns a job ID of 0, you can use
<a href='#cupsLastErrorString'><code>cupsLastErrorString</code></a> to show
the reason why the job could not be created:</p>
<pre class='example'>
#include <cups/cups.h>
int job_id;
if (job_id == 0)
puts(cupsLastErrorString());
</pre>
<h3><a name='PASSWORDS_AND_AUTHENTICATION'>Passwords and Authentication</a></h3>
<p>CUPS supports authentication of any request, including submission of print
jobs. The default mechanism for getting the username and password is to use the
login user and a password from the console.</p>
<p>To support other types of applications, in particular Graphical User
Interfaces ("GUIs"), the CUPS API provides functions to set the default
username and to register a callback function that returns a password string.</p>
<p>The <a href="#cupsSetPasswordCB"><code>cupsSetPasswordCB</code></a>
function is used to set a password callback in your program. Only one
function can be used at any time.</p>
<p>The <a href="#cupsSetUser"><code>cupsSetUser</code></a> function sets the
current username for authentication. This function can be called by your
password callback function to change the current username as needed.</p>
<p>The following example shows a simple password callback that gets a
username and password from the user:</p>
<pre class='example'>
#include <cups/cups.h>
const char *
my_password_cb(const char *prompt)
{
char user[65];
puts(prompt);
/* Get a username from the user */
printf("Username: ");
if (fgets(user, sizeof(user), stdin) == NULL)
return (NULL);
/* Strip the newline from the string and set the user */
user[strlen(user) - 1] = '\0';
<a href='#cupsSetUser'>cupsSetUser</a>(user);
/* Use getpass() to ask for the password... */
return (getpass("Password: "));
}
<a href='#cupsSetPasswordCB'>cupsSetPasswordCB</a>(my_password_cb);
</pre>
<p>Similarly, a GUI could display the prompt string in a window with input
fields for the username and password. The username should default to the
string returned by the <a href="#cupsUser"><code>cupsUser</code></a>
function.</p>
<h2 class="title"><a name="FUNCTIONS">Functions</a></h2>
<h3 class="function"><a name="cupsAddDest">cupsAddDest</a></h3>
<p class="description">Add a destination to the list of destinations.</p>
<p class="code">
int cupsAddDest (<br>
const char *name,<br>
const char *instance,<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> **dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>instance</dt>
<dd class="description">Instance name or <code>NULL</code> for none/primary</dd>
<dt>num_dests</dt>
<dd class="description">Number of destinations</dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">New number of destinations</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function cannot be used to add a new class or printer queue,
it only adds a new container of saved options for the named
destination or instance.<br>
<br>
If the named destination already exists, the destination list is
returned unchanged. Adding a new instance of a destination creates
a copy of that destination's options.<br>
<br>
Use the <a href="#cupsSaveDests"><code>cupsSaveDests</code></a> function to save the updated list of
destinations to the user's lpoptions file.</p>
<h3 class="function"><a name="cupsAddOption">cupsAddOption</a></h3>
<p class="description">Add an option to an option array.</p>
<p class="code">
int cupsAddOption (<br>
const char *name,<br>
const char *value,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> **options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Name of option</dd>
<dt>value</dt>
<dd class="description">Value of option</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Pointer to options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of options</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">New option arrays can be initialized simply by passing 0 for the
"num_options" parameter.</p>
<h3 class="function"><span class="info"> DEPRECATED </span><a name="cupsAdminCreateWindowsPPD">cupsAdminCreateWindowsPPD</a></h3>
<p class="description">Create the Windows PPD file for a printer.</p>
<p class="code">
char *cupsAdminCreateWindowsPPD (<br>
http_t *http,<br>
const char *dest,<br>
char *buffer,<br>
int bufsize<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>dest</dt>
<dd class="description">Printer or class</dd>
<dt>buffer</dt>
<dd class="description">Filename buffer</dd>
<dt>bufsize</dt>
<dd class="description">Size of filename buffer</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">PPD file or NULL</p>
<h3 class="function"><span class="info"> DEPRECATED </span><a name="cupsAdminExportSamba">cupsAdminExportSamba</a></h3>
<p class="description">Export a printer to Samba.</p>
<p class="code">
int cupsAdminExportSamba (<br>
const char *dest,<br>
const char *ppd,<br>
const char *samba_server,<br>
const char *samba_user,<br>
const char *samba_password,<br>
FILE *logfile<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>dest</dt>
<dd class="description">Destination to export</dd>
<dt>ppd</dt>
<dd class="description">PPD file</dd>
<dt>samba_server</dt>
<dd class="description">Samba server</dd>
<dt>samba_user</dt>
<dd class="description">Samba username</dd>
<dt>samba_password</dt>
<dd class="description">Samba password</dd>
<dt>logfile</dt>
<dd class="description">Log file, if any</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h3 class="function"><span class="info"> CUPS 1.3/OS X 10.5 </span><a name="cupsAdminGetServerSettings">cupsAdminGetServerSettings</a></h3>
<p class="description">Get settings from the server.</p>
<p class="code">
int cupsAdminGetServerSettings (<br>
http_t *http,<br>
int *num_settings,<br>
<a href="#cups_option_t">cups_option_t</a> **settings<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>num_settings</dt>
<dd class="description">Number of settings</dd>
<dt>settings</dt>
<dd class="description">Settings</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned settings should be freed with cupsFreeOptions() when
you are done with them.
</p>
<h3 class="function"><span class="info"> CUPS 1.3/OS X 10.5 </span><a name="cupsAdminSetServerSettings">cupsAdminSetServerSettings</a></h3>
<p class="description">Set settings on the server.</p>
<p class="code">
int cupsAdminSetServerSettings (<br>
http_t *http,<br>
int num_settings,<br>
<a href="#cups_option_t">cups_option_t</a> *settings<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>num_settings</dt>
<dd class="description">Number of settings</dd>
<dt>settings</dt>
<dd class="description">Settings</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h3 class="function"><a name="cupsCancelDestJob">cupsCancelDestJob</a></h3>
<p class="description">Include necessary headers...</p>
<p class="code">
ipp_status_t cupsCancelDestJob (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
int job_id<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>job_id</dt>
<dd class="description">Job ID</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Cancel a job on a destination.</p>
<p class="discussion">The "job_id" is the number returned by cupsCreateDestJob.<br>
<br>
Returns IPP_STATUS_OK on success and IPP_NOT_AUTHORIZED or IPP_FORBIDDEN on
failure.
</p>
<h3 class="function"><a name="cupsCancelJob">cupsCancelJob</a></h3>
<p class="description">Cancel a print job on the default server.</p>
<p class="code">
int cupsCancelJob (<br>
const char *name,<br>
int job_id<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Name of printer or class</dd>
<dt>job_id</dt>
<dd class="description">Job ID, <code>CUPS_JOBID_CURRENT</code> for the current job, or <code>CUPS_JOBID_ALL</code> for all jobs</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Pass <code>CUPS_JOBID_ALL</code> to cancel all jobs or <code>CUPS_JOBID_CURRENT</code>
to cancel the current job on the named destination.<br>
<br>
Use the <a href="#cupsLastError"><code>cupsLastError</code></a> and <a href="#cupsLastErrorString"><code>cupsLastErrorString</code></a> functions to get
the cause of any failure.</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsCancelJob2">cupsCancelJob2</a></h3>
<p class="description">Cancel or purge a print job.</p>
<p class="code">
ipp_status_t cupsCancelJob2 (<br>
http_t *http,<br>
const char *name,<br>
int job_id,<br>
int purge<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Name of printer or class</dd>
<dt>job_id</dt>
<dd class="description">Job ID, <code>CUPS_JOBID_CURRENT</code> for the current job, or <code>CUPS_JOBID_ALL</code> for all jobs</dd>
<dt>purge</dt>
<dd class="description">1 to purge, 0 to cancel</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">IPP status</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Canceled jobs remain in the job history while purged jobs are removed
from the job history.<br>
<br>
Pass <code>CUPS_JOBID_ALL</code> to cancel all jobs or <code>CUPS_JOBID_CURRENT</code>
to cancel the current job on the named destination.<br>
<br>
Use the <a href="#cupsLastError"><code>cupsLastError</code></a> and <a href="#cupsLastErrorString"><code>cupsLastErrorString</code></a> functions to get
the cause of any failure.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsCheckDestSupported">cupsCheckDestSupported</a></h3>
<p class="description">Check that the option and value are supported
by the destination.</p>
<p class="code">
int cupsCheckDestSupported (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
const char *option,<br>
const char *value<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>option</dt>
<dd class="description">Option</dd>
<dt>value</dt>
<dd class="description">Value</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 if supported, 0 otherwise</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Returns 1 if supported, 0 otherwise.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsCloseDestJob">cupsCloseDestJob</a></h3>
<p class="description">Close a job and start printing.</p>
<p class="code">
ipp_status_t cupsCloseDestJob (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *info,<br>
int job_id<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>info</dt>
<dd class="description">Destination information</dd>
<dt>job_id</dt>
<dd class="description">Job ID</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">IPP status code</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Use when the last call to cupsStartDocument passed 0 for "last_document".
"job_id" is the job ID returned by cupsCreateDestJob. Returns <code>IPP_STATUS_OK</code>
on success.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsConnectDest">cupsConnectDest</a></h3>
<p class="description">Connect to the server for a destination.</p>
<p class="code">
http_t *cupsConnectDest (<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
unsigned flags,<br>
int msec,<br>
int *cancel,<br>
char *resource,<br>
size_t resourcesize,<br>
<a href="#cups_dest_cb_t">cups_dest_cb_t</a> cb,<br>
void *user_data<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>flags</dt>
<dd class="description">Connection flags</dd>
<dt>msec</dt>
<dd class="description">Timeout in milliseconds</dd>
<dt>cancel</dt>
<dd class="description">Pointer to "cancel" variable</dd>
<dt>resource</dt>
<dd class="description">Resource buffer</dd>
<dt>resourcesize</dt>
<dd class="description">Size of resource buffer</dd>
<dt>cb</dt>
<dd class="description">Callback function</dd>
<dt>user_data</dt>
<dd class="description">User data pointer</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Connection to server or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Connect to the destination, returning a new http_t connection object and
optionally the resource path to use for the destination. These calls will
block until a connection is made, the timeout expires, the integer pointed
to by "cancel" is non-zero, or the callback function (or block) returns 0,
The caller is responsible for calling httpClose() on the returned object.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsConnectDestBlock">cupsConnectDestBlock</a></h3>
<p class="description">Connect to the server for a destination.</p>
<p class="code">
http_t *cupsConnectDestBlock (<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
unsigned flags,<br>
int msec,<br>
int *cancel,<br>
char *resource,<br>
size_t resourcesize,<br>
<a href="#cups_dest_block_t">cups_dest_block_t</a> block<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>flags</dt>
<dd class="description">Connection flags</dd>
<dt>msec</dt>
<dd class="description">Timeout in milliseconds</dd>
<dt>cancel</dt>
<dd class="description">Pointer to "cancel" variable</dd>
<dt>resource</dt>
<dd class="description">Resource buffer</dd>
<dt>resourcesize</dt>
<dd class="description">Size of resource buffer</dd>
<dt>block</dt>
<dd class="description">Callback block</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Connection to server or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Connect to the destination, returning a new http_t connection object and
optionally the resource path to use for the destination. These calls will
block until a connection is made, the timeout expires, the integer pointed
to by "cancel" is non-zero, or the callback function (or block) returns 0,
The caller is responsible for calling httpClose() on the returned object.
</p>
<h3 class="function"><a name="cupsCopyDest">cupsCopyDest</a></h3>
<p class="description">Callback block</p>
<p class="code">
int cupsCopyDest (<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> **dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>dest</dt>
<dt>num_dests</dt>
<dt>dests</dt>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Copy a destination.</p>
<p class="discussion">Make a copy of the destination to an array of destinations (or just a single
copy) - for use with the cupsEnumDests* functions. The caller is responsible
for calling cupsFreeDests() on the returned object(s).
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsCopyDestConflicts">cupsCopyDestConflicts</a></h3>
<p class="description">Get conflicts and resolutions for a new
option/value pair.</p>
<p class="code">
int cupsCopyDestConflicts (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options,<br>
const char *new_option,<br>
const char *new_value,<br>
int *num_conflicts,<br>
<a href="#cups_option_t">cups_option_t</a> **conflicts,<br>
int *num_resolved,<br>
<a href="#cups_option_t">cups_option_t</a> **resolved<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>num_options</dt>
<dd class="description">Number of current options</dd>
<dt>options</dt>
<dd class="description">Current options</dd>
<dt>new_option</dt>
<dd class="description">New option</dd>
<dt>new_value</dt>
<dd class="description">New value</dd>
<dt>num_conflicts</dt>
<dd class="description">Number of conflicting options</dd>
<dt>conflicts</dt>
<dd class="description">Conflicting options</dd>
<dt>num_resolved</dt>
<dd class="description">Number of options to resolve</dd>
<dt>resolved</dt>
<dd class="description">Resolved options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 if there is a conflict, 0 if none, -1 on error</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">"num_options" and "options" represent the currently selected options by the
user. "new_option" and "new_value" are the setting the user has just
changed.<br>
<br>
Returns 1 if there is a conflict, 0 if there are no conflicts, and -1 if
there was an unrecoverable error such as a resolver loop.<br>
<br>
If "num_conflicts" and "conflicts" are not <code>NULL</code>, they are set to
contain the list of conflicting option/value pairs. Similarly, if
"num_resolved" and "resolved" are not <code>NULL</code> they will be set to the
list of changes needed to resolve the conflict.<br>
<br>
If cupsCopyDestConflicts returns 1 but "num_resolved" and "resolved" are set
to 0 and <code>NULL</code>, respectively, then the conflict cannot be resolved.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsCopyDestInfo">cupsCopyDestInfo</a></h3>
<p class="description">Get the supported values/capabilities for the
destination.</p>
<p class="code">
<a href="#cups_dinfo_t">cups_dinfo_t</a> *cupsCopyDestInfo (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Destination information</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The caller is responsible for calling <a href="#cupsFreeDestInfo"><code>cupsFreeDestInfo</code></a> on the return
value. <code>NULL</code> is returned on error.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsCreateDestJob">cupsCreateDestJob</a></h3>
<p class="description">Create a job on a destination.</p>
<p class="code">
ipp_status_t cupsCreateDestJob (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *info,<br>
int *job_id,<br>
const char *title,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>info</dt>
<dd class="description">Destination information</dd>
<dt>job_id</dt>
<dd class="description">Job ID or 0 on error</dd>
<dt>title</dt>
<dd class="description">Job name</dd>
<dt>num_options</dt>
<dd class="description">Number of job options</dd>
<dt>options</dt>
<dd class="description">Job options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">IPP status code</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Returns <code>IPP_STATUS_OK</code> or <code>IPP_STATUS_OK_SUBST</code> on success, saving the job ID
in the variable pointed to by "job_id".
</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsCreateJob">cupsCreateJob</a></h3>
<p class="description">Create an empty job for streaming.</p>
<p class="code">
int cupsCreateJob (<br>
http_t *http,<br>
const char *name,<br>
const char *title,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>title</dt>
<dd class="description">Title of job</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Job ID or 0 on error</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Use this function when you want to stream print data using the
<a href="#cupsStartDocument"><code>cupsStartDocument</code></a>, <a href="#cupsWriteRequestData"><code>cupsWriteRequestData</code></a>, and
<a href="#cupsFinishDocument"><code>cupsFinishDocument</code></a> functions. If you have one or more files to
print, use the <a href="#cupsPrintFile2"><code>cupsPrintFile2</code></a> or <a href="#cupsPrintFiles2"><code>cupsPrintFiles2</code></a> function
instead.
</p>
<h3 class="function"><a name="cupsEncryption">cupsEncryption</a></h3>
<p class="description">Get the current encryption settings.</p>
<p class="code">
http_encryption_t cupsEncryption (void);</p>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Encryption settings</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The default encryption setting comes from the CUPS_ENCRYPTION
environment variable, then the ~/.cups/client.conf file, and finally the
/etc/cups/client.conf file. If not set, the default is
<code>HTTP_ENCRYPTION_IF_REQUESTED</code>.<br>
<br>
Note: The current encryption setting is tracked separately for each thread
in a program. Multi-threaded programs that override the setting via the
<a href="#cupsSetEncryption"><code>cupsSetEncryption</code></a> function need to do so in each thread for the same
setting to be used.</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsEnumDests">cupsEnumDests</a></h3>
<p class="description">Enumerate available destinations with a callback function.</p>
<p class="code">
int cupsEnumDests (<br>
unsigned flags,<br>
int msec,<br>
int *cancel,<br>
<a href="#cups_ptype_t">cups_ptype_t</a> type,<br>
<a href="#cups_ptype_t">cups_ptype_t</a> mask,<br>
<a href="#cups_dest_cb_t">cups_dest_cb_t</a> cb,<br>
void *user_data<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>flags</dt>
<dd class="description">Enumeration flags</dd>
<dt>msec</dt>
<dd class="description">Timeout in milliseconds,
-1 for indefinite</dd>
<dt>cancel</dt>
<dd class="description">Pointer to "cancel" variable</dd>
<dt>type</dt>
<dd class="description">Printer type bits</dd>
<dt>mask</dt>
<dd class="description">Mask for printer type bits</dd>
<dt>cb</dt>
<dd class="description">Callback function</dd>
<dt>user_data</dt>
<dd class="description">User data</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Destinations are enumerated from one or more sources. The callback function
receives the <code>user_data</code> pointer, destination name, instance, number of
options, and options which can be used as input to the <a href="#cupsAddDest"><code>cupsAddDest</code></a>
function. The function must return 1 to continue enumeration or 0 to stop.<br>
<br>
Enumeration happens on the current thread and does not return until all
destinations have been enumerated or the callback function returns 0.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsEnumDestsBlock">cupsEnumDestsBlock</a></h3>
<p class="description">Enumerate available destinations with a block.</p>
<p class="code">
int cupsEnumDestsBlock (<br>
unsigned flags,<br>
int timeout,<br>
int *cancel,<br>
<a href="#cups_ptype_t">cups_ptype_t</a> type,<br>
<a href="#cups_ptype_t">cups_ptype_t</a> mask,<br>
<a href="#cups_dest_block_t">cups_dest_block_t</a> block<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>flags</dt>
<dd class="description">Enumeration flags</dd>
<dt>timeout</dt>
<dd class="description">Timeout in milliseconds, 0 for indefinite</dd>
<dt>cancel</dt>
<dd class="description">Pointer to "cancel" variable</dd>
<dt>type</dt>
<dd class="description">Printer type bits</dd>
<dt>mask</dt>
<dd class="description">Mask for printer type bits</dd>
<dt>block</dt>
<dd class="description">Block</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Destinations are enumerated from one or more sources. The block receives the
destination name, instance, number of options, and options which can be used
as input to the <a href="#cupsAddDest"><code>cupsAddDest</code></a> function. The block must return 1 to
continue enumeration or 0 to stop.<br>
<br>
Enumeration happens on the current thread and does not return until all
destinations have been enumerated or the block returns 0.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsFindDestDefault">cupsFindDestDefault</a></h3>
<p class="description">Find the default value(s) for the given option.</p>
<p class="code">
ipp_attribute_t *cupsFindDestDefault (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
const char *option<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>option</dt>
<dd class="description">Option/attribute name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Default attribute or <code>NULL</code> for none</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned value is an IPP attribute. Use the <code>ippGetBoolean</code>,
<code>ippGetCollection</code>, <code>ippGetCount</code>, <code>ippGetDate</code>,
<code>ippGetInteger</code>, <code>ippGetOctetString</code>, <code>ippGetRange</code>,
<code>ippGetResolution</code>, <code>ippGetString</code>, and <code>ippGetValueTag</code>
functions to inspect the default value(s) as needed.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsFindDestReady">cupsFindDestReady</a></h3>
<p class="description">Find the default value(s) for the given option.</p>
<p class="code">
ipp_attribute_t *cupsFindDestReady (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
const char *option<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>option</dt>
<dd class="description">Option/attribute name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Default attribute or <code>NULL</code> for none</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned value is an IPP attribute. Use the <code>ippGetBoolean</code>,
<code>ippGetCollection</code>, <code>ippGetCount</code>, <code>ippGetDate</code>,
<code>ippGetInteger</code>, <code>ippGetOctetString</code>, <code>ippGetRange</code>,
<code>ippGetResolution</code>, <code>ippGetString</code>, and <code>ippGetValueTag</code>
functions to inspect the default value(s) as needed.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsFindDestSupported">cupsFindDestSupported</a></h3>
<p class="description">Find the default value(s) for the given option.</p>
<p class="code">
ipp_attribute_t *cupsFindDestSupported (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
const char *option<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>option</dt>
<dd class="description">Option/attribute name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Default attribute or <code>NULL</code> for none</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned value is an IPP attribute. Use the <code>ippGetBoolean</code>,
<code>ippGetCollection</code>, <code>ippGetCount</code>, <code>ippGetDate</code>,
<code>ippGetInteger</code>, <code>ippGetOctetString</code>, <code>ippGetRange</code>,
<code>ippGetResolution</code>, <code>ippGetString</code>, and <code>ippGetValueTag</code>
functions to inspect the default value(s) as needed.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsFinishDestDocument">cupsFinishDestDocument</a></h3>
<p class="description">Finish the current document.</p>
<p class="code">
ipp_status_t cupsFinishDestDocument (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *info<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>info</dt>
<dd class="description">Destination information</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Status of document submission</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Returns <code>IPP_STATUS_OK</code> or <code>IPP_STATUS_OK_SUBST</code> on success.
</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsFinishDocument">cupsFinishDocument</a></h3>
<p class="description">Finish sending a document.</p>
<p class="code">
ipp_status_t cupsFinishDocument (<br>
http_t *http,<br>
const char *name<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Destination name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Status of document submission</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The document must have been started using <a href="#cupsStartDocument"><code>cupsStartDocument</code></a>.
</p>
<h3 class="function"><a name="cupsFreeDestInfo">cupsFreeDestInfo</a></h3>
<p class="description">Free destination information obtained using
<a href="#cupsCopyDestInfo"><code>cupsCopyDestInfo</code></a>.</p>
<p class="code">
void cupsFreeDestInfo (<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
</dl>
<h3 class="function"><a name="cupsFreeDests">cupsFreeDests</a></h3>
<p class="description">Free the memory used by the list of destinations.</p>
<p class="code">
void cupsFreeDests (<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>num_dests</dt>
<dd class="description">Number of destinations</dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h3 class="function"><a name="cupsFreeJobs">cupsFreeJobs</a></h3>
<p class="description">Free memory used by job data.</p>
<p class="code">
void cupsFreeJobs (<br>
int num_jobs,<br>
<a href="#cups_job_t">cups_job_t</a> *jobs<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>num_jobs</dt>
<dd class="description">Number of jobs</dd>
<dt>jobs</dt>
<dd class="description">Jobs</dd>
</dl>
<h3 class="function"><a name="cupsFreeOptions">cupsFreeOptions</a></h3>
<p class="description">Free all memory used by options.</p>
<p class="code">
void cupsFreeOptions (<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Pointer to options</dd>
</dl>
<h3 class="function"><span class="info"> DEPRECATED </span><a name="cupsGetClasses">cupsGetClasses</a></h3>
<p class="description">Get a list of printer classes from the default server.</p>
<p class="code">
int cupsGetClasses (<br>
char ***classes<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>classes</dt>
<dd class="description">Classes</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of classes</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function is deprecated - use <a href="#cupsGetDests"><code>cupsGetDests</code></a> instead.
</p>
<h3 class="function"><a name="cupsGetDefault">cupsGetDefault</a></h3>
<p class="description">Get the default printer or class for the default server.</p>
<p class="code">
const char *cupsGetDefault (void);</p>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Default printer or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function returns the default printer or class as defined by
the LPDEST or PRINTER environment variables. If these environment
variables are not set, the server default destination is returned.
Applications should use the <a href="#cupsGetDests"><code>cupsGetDests</code></a> and <a href="#cupsGetDest"><code>cupsGetDest</code></a>
functions to get the user-defined default printer, as this function does
not support the lpoptions-defined default printer.</p>
<h3 class="function"><span class="info"> CUPS 1.1.21/OS X 10.4 </span><a name="cupsGetDefault2">cupsGetDefault2</a></h3>
<p class="description">Get the default printer or class for the specified server.</p>
<p class="code">
const char *cupsGetDefault2 (<br>
http_t *http<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Default printer or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function returns the default printer or class as defined by
the LPDEST or PRINTER environment variables. If these environment
variables are not set, the server default destination is returned.
Applications should use the <a href="#cupsGetDests"><code>cupsGetDests</code></a> and <a href="#cupsGetDest"><code>cupsGetDest</code></a>
functions to get the user-defined default printer, as this function does
not support the lpoptions-defined default printer.
</p>
<h3 class="function"><a name="cupsGetDest">cupsGetDest</a></h3>
<p class="description">Get the named destination from the list.</p>
<p class="code">
<a href="#cups_dest_t">cups_dest_t</a> *cupsGetDest (<br>
const char *name,<br>
const char *instance,<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Destination name or <code>NULL</code> for the default destination</dd>
<dt>instance</dt>
<dd class="description">Instance name or <code>NULL</code></dd>
<dt>num_dests</dt>
<dd class="description">Number of destinations</dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Destination pointer or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Use the <a href="#cupsGetDests"><code>cupsGetDests</code></a> or <a href="#cupsGetDests2"><code>cupsGetDests2</code></a> functions to get a
list of supported destinations for the current user.</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsGetDestMediaByIndex">cupsGetDestMediaByIndex</a></h3>
<p class="description">Get a media name, dimension, and margins for a
specific size.</p>
<p class="code">
int cupsGetDestMediaByIndex (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
int n,<br>
unsigned flags,<br>
<a href="#cups_size_t">cups_size_t</a> *size<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>n</dt>
<dd class="description">Media size number (0-based)</dd>
<dt>flags</dt>
<dd class="description">Media flags</dd>
<dt>size</dt>
<dd class="description">Media size information</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The <code>flags</code> parameter determines which set of media are indexed. For
example, passing <code>CUPS_MEDIA_FLAGS_BORDERLESS</code> will get the Nth
borderless size supported by the printer.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsGetDestMediaByName">cupsGetDestMediaByName</a></h3>
<p class="description">Get media names, dimensions, and margins.</p>
<p class="code">
int cupsGetDestMediaByName (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
const char *media,<br>
unsigned flags,<br>
<a href="#cups_size_t">cups_size_t</a> *size<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>media</dt>
<dd class="description">Media name</dd>
<dt>flags</dt>
<dd class="description">Media matching flags</dd>
<dt>size</dt>
<dd class="description">Media size information</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on match, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The "media" string is a PWG media name. "Flags" provides some matching
guidance (multiple flags can be combined):<br>
<br>
CUPS_MEDIA_FLAGS_DEFAULT = find the closest size supported by the printer,
CUPS_MEDIA_FLAGS_BORDERLESS = find a borderless size,
CUPS_MEDIA_FLAGS_DUPLEX = find a size compatible with 2-sided printing,
CUPS_MEDIA_FLAGS_EXACT = find an exact match for the size, and
CUPS_MEDIA_FLAGS_READY = if the printer supports media sensing, find the
size amongst the "ready" media.<br>
<br>
The matching result (if any) is returned in the "cups_size_t" structure.<br>
<br>
Returns 1 when there is a match and 0 if there is not a match.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsGetDestMediaBySize">cupsGetDestMediaBySize</a></h3>
<p class="description">Get media names, dimensions, and margins.</p>
<p class="code">
int cupsGetDestMediaBySize (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
int width,<br>
int length,<br>
unsigned flags,<br>
<a href="#cups_size_t">cups_size_t</a> *size<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>width</dt>
<dd class="description">Media width in hundredths of
of millimeters</dd>
<dt>length</dt>
<dd class="description">Media length in hundredths of
of millimeters</dd>
<dt>flags</dt>
<dd class="description">Media matching flags</dd>
<dt>size</dt>
<dd class="description">Media size information</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on match, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">"Width" and "length" are the dimensions in hundredths of millimeters.
"Flags" provides some matching guidance (multiple flags can be combined):<br>
<br>
CUPS_MEDIA_FLAGS_DEFAULT = find the closest size supported by the printer,
CUPS_MEDIA_FLAGS_BORDERLESS = find a borderless size,
CUPS_MEDIA_FLAGS_DUPLEX = find a size compatible with 2-sided printing,
CUPS_MEDIA_FLAGS_EXACT = find an exact match for the size, and
CUPS_MEDIA_FLAGS_READY = if the printer supports media sensing, find the
size amongst the "ready" media.<br>
<br>
The matching result (if any) is returned in the "cups_size_t" structure.<br>
<br>
Returns 1 when there is a match and 0 if there is not a match.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsGetDestMediaCount">cupsGetDestMediaCount</a></h3>
<p class="description">Get the number of sizes supported by a
destination.</p>
<p class="code">
int cupsGetDestMediaCount (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
unsigned flags<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>flags</dt>
<dd class="description">Media flags</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of sizes</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The <code>flags</code> parameter determines the set of media sizes that are
counted. For example, passing <code>CUPS_MEDIA_FLAGS_BORDERLESS</code> will return
the number of borderless sizes.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsGetDestMediaDefault">cupsGetDestMediaDefault</a></h3>
<p class="description">Get the default size for a destination.</p>
<p class="code">
int cupsGetDestMediaDefault (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
unsigned flags,<br>
<a href="#cups_size_t">cups_size_t</a> *size<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>flags</dt>
<dd class="description">Media flags</dd>
<dt>size</dt>
<dd class="description">Media size information</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The <code>flags</code> parameter determines which default size is returned. For
example, passing <code>CUPS_MEDIA_FLAGS_BORDERLESS</code> will return the default
borderless size, typically US Letter or A4, but sometimes 4x6 photo media.
</p>
<h3 class="function"><a name="cupsGetDests">cupsGetDests</a></h3>
<p class="description">Get the list of destinations from the default server.</p>
<p class="code">
int cupsGetDests (<br>
<a href="#cups_dest_t">cups_dest_t</a> **dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of destinations</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Starting with CUPS 1.2, the returned list of destinations include the
printer-info, printer-is-accepting-jobs, printer-is-shared,
printer-make-and-model, printer-state, printer-state-change-time,
printer-state-reasons, and printer-type attributes as options. CUPS 1.4
adds the marker-change-time, marker-colors, marker-high-levels,
marker-levels, marker-low-levels, marker-message, marker-names,
marker-types, and printer-commands attributes as well.<br>
<br>
Use the <a href="#cupsFreeDests"><code>cupsFreeDests</code></a> function to free the destination list and
the <a href="#cupsGetDest"><code>cupsGetDest</code></a> function to find a particular destination.</p>
<h3 class="function"><span class="info"> CUPS 1.1.21/OS X 10.4 </span><a name="cupsGetDests2">cupsGetDests2</a></h3>
<p class="description">Get the list of destinations from the specified server.</p>
<p class="code">
int cupsGetDests2 (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> **dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of destinations</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Starting with CUPS 1.2, the returned list of destinations include the
printer-info, printer-is-accepting-jobs, printer-is-shared,
printer-make-and-model, printer-state, printer-state-change-time,
printer-state-reasons, and printer-type attributes as options. CUPS 1.4
adds the marker-change-time, marker-colors, marker-high-levels,
marker-levels, marker-low-levels, marker-message, marker-names,
marker-types, and printer-commands attributes as well.<br>
<br>
Use the <a href="#cupsFreeDests"><code>cupsFreeDests</code></a> function to free the destination list and
the <a href="#cupsGetDest"><code>cupsGetDest</code></a> function to find a particular destination.
</p>
<h3 class="function"><a name="cupsGetJobs">cupsGetJobs</a></h3>
<p class="description">Get the jobs from the default server.</p>
<p class="code">
int cupsGetJobs (<br>
<a href="#cups_job_t">cups_job_t</a> **jobs,<br>
const char *name,<br>
int myjobs,<br>
int whichjobs<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>jobs</dt>
<dd class="description">Job data</dd>
<dt>name</dt>
<dd class="description"><code>NULL</code> = all destinations, otherwise show jobs for named destination</dd>
<dt>myjobs</dt>
<dd class="description">0 = all users, 1 = mine</dd>
<dt>whichjobs</dt>
<dd class="description"><code>CUPS_WHICHJOBS_ALL</code>, <code>CUPS_WHICHJOBS_ACTIVE</code>, or <code>CUPS_WHICHJOBS_COMPLETED</code></dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of jobs</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">A "whichjobs" value of <code>CUPS_WHICHJOBS_ALL</code> returns all jobs regardless
of state, while <code>CUPS_WHICHJOBS_ACTIVE</code> returns jobs that are
pending, processing, or held and <code>CUPS_WHICHJOBS_COMPLETED</code> returns
jobs that are stopped, canceled, aborted, or completed.</p>
<h3 class="function"><span class="info"> CUPS 1.1.21/OS X 10.4 </span><a name="cupsGetJobs2">cupsGetJobs2</a></h3>
<p class="description">Get the jobs from the specified server.</p>
<p class="code">
int cupsGetJobs2 (<br>
http_t *http,<br>
<a href="#cups_job_t">cups_job_t</a> **jobs,<br>
const char *name,<br>
int myjobs,<br>
int whichjobs<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>jobs</dt>
<dd class="description">Job data</dd>
<dt>name</dt>
<dd class="description"><code>NULL</code> = all destinations, otherwise show jobs for named destination</dd>
<dt>myjobs</dt>
<dd class="description">0 = all users, 1 = mine</dd>
<dt>whichjobs</dt>
<dd class="description"><code>CUPS_WHICHJOBS_ALL</code>, <code>CUPS_WHICHJOBS_ACTIVE</code>, or <code>CUPS_WHICHJOBS_COMPLETED</code></dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of jobs</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">A "whichjobs" value of <code>CUPS_WHICHJOBS_ALL</code> returns all jobs regardless
of state, while <code>CUPS_WHICHJOBS_ACTIVE</code> returns jobs that are
pending, processing, or held and <code>CUPS_WHICHJOBS_COMPLETED</code> returns
jobs that are stopped, canceled, aborted, or completed.
</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsGetNamedDest">cupsGetNamedDest</a></h3>
<p class="description">Get options for the named destination.</p>
<p class="code">
<a href="#cups_dest_t">cups_dest_t</a> *cupsGetNamedDest (<br>
http_t *http,<br>
const char *name,<br>
const char *instance<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Destination name or <code>NULL</code> for the default destination</dd>
<dt>instance</dt>
<dd class="description">Instance name or <code>NULL</code></dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Destination or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function is optimized for retrieving a single destination and should
be used instead of <a href="#cupsGetDests"><code>cupsGetDests</code></a> and <a href="#cupsGetDest"><code>cupsGetDest</code></a> when you either
know the name of the destination or want to print to the default destination.
If <code>NULL</code> is returned, the destination does not exist or there is no
default destination.<br>
<br>
If "http" is <code>CUPS_HTTP_DEFAULT</code>, the connection to the default print
server will be used.<br>
<br>
If "name" is <code>NULL</code>, the default printer for the current user will be
returned.<br>
<br>
The returned destination must be freed using <a href="#cupsFreeDests"><code>cupsFreeDests</code></a> with a
"num_dests" value of 1.
</p>
<h3 class="function"><a name="cupsGetOption">cupsGetOption</a></h3>
<p class="description">Get an option value.</p>
<p class="code">
const char *cupsGetOption (<br>
const char *name,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Name of option</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Option value or <code>NULL</code></p>
<h3 class="function"><a name="cupsGetPPD">cupsGetPPD</a></h3>
<p class="description">Get the PPD file for a printer on the default server.</p>
<p class="code">
const char *cupsGetPPD (<br>
const char *name<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Destination name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Filename for PPD file</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">For classes, <code>cupsGetPPD</code> returns the PPD file for the first printer
in the class.<br>
<br>
The returned filename is stored in a static buffer and is overwritten with
each call to <code>cupsGetPPD</code> or <a href="#cupsGetPPD2"><code>cupsGetPPD2</code></a>. The caller "owns" the
file that is created and must <code>unlink</code> the returned filename.</p>
<h3 class="function"><span class="info"> CUPS 1.1.21/OS X 10.4 </span><a name="cupsGetPPD2">cupsGetPPD2</a></h3>
<p class="description">Get the PPD file for a printer from the specified server.</p>
<p class="code">
const char *cupsGetPPD2 (<br>
http_t *http,<br>
const char *name<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Destination name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Filename for PPD file</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">For classes, <code>cupsGetPPD2</code> returns the PPD file for the first printer
in the class.<br>
<br>
The returned filename is stored in a static buffer and is overwritten with
each call to <a href="#cupsGetPPD"><code>cupsGetPPD</code></a> or <code>cupsGetPPD2</code>. The caller "owns" the
file that is created and must <code>unlink</code> the returned filename.
</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsGetPPD3">cupsGetPPD3</a></h3>
<p class="description">Get the PPD file for a printer on the specified
server if it has changed.</p>
<p class="code">
http_status_t cupsGetPPD3 (<br>
http_t *http,<br>
const char *name,<br>
time_t *modtime,<br>
char *buffer,<br>
size_t bufsize<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">HTTP connection or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>modtime</dt>
<dd class="description">Modification time</dd>
<dt>buffer</dt>
<dd class="description">Filename buffer</dd>
<dt>bufsize</dt>
<dd class="description">Size of filename buffer</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">HTTP status</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The "modtime" parameter contains the modification time of any
locally-cached content and is updated with the time from the PPD file on
the server.<br>
<br>
The "buffer" parameter contains the local PPD filename. If it contains
the empty string, a new temporary file is created, otherwise the existing
file will be overwritten as needed. The caller "owns" the file that is
created and must <code>unlink</code> the returned filename.<br>
<br>
On success, <code>HTTP_STATUS_OK</code> is returned for a new PPD file and
<code>HTTP_STATUS_NOT_MODIFIED</code> if the existing PPD file is up-to-date. Any other
status is an error.<br>
<br>
For classes, <code>cupsGetPPD3</code> returns the PPD file for the first printer
in the class.
</p>
<h3 class="function"><a name="cupsGetPassword">cupsGetPassword</a></h3>
<p class="description">Get a password from the user.</p>
<p class="code">
const char *cupsGetPassword (<br>
const char *prompt<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>prompt</dt>
<dd class="description">Prompt string</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Password</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Uses the current password callback function. Returns <code>NULL</code> if the
user does not provide a password.<br>
<br>
Note: The current password callback function is tracked separately for each
thread in a program. Multi-threaded programs that override the setting via
the <a href="#cupsSetPasswordCB"><code>cupsSetPasswordCB</code></a> or <a href="#cupsSetPasswordCB2"><code>cupsSetPasswordCB2</code></a> functions need to
do so in each thread for the same function to be used.</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsGetPassword2">cupsGetPassword2</a></h3>
<p class="description">Get a password from the user using the advanced
password callback.</p>
<p class="code">
const char *cupsGetPassword2 (<br>
const char *prompt,<br>
http_t *http,<br>
const char *method,<br>
const char *resource<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>prompt</dt>
<dd class="description">Prompt string</dd>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>method</dt>
<dd class="description">Request method ("GET", "POST", "PUT")</dd>
<dt>resource</dt>
<dd class="description">Resource path</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Password</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Uses the current password callback function. Returns <code>NULL</code> if the
user does not provide a password.<br>
<br>
Note: The current password callback function is tracked separately for each
thread in a program. Multi-threaded programs that override the setting via
the <a href="#cupsSetPasswordCB"><code>cupsSetPasswordCB</code></a> or <a href="#cupsSetPasswordCB2"><code>cupsSetPasswordCB2</code></a> functions need to
do so in each thread for the same function to be used.
</p>
<h3 class="function"><span class="info"> DEPRECATED </span><a name="cupsGetPrinters">cupsGetPrinters</a></h3>
<p class="description">Get a list of printers from the default server.</p>
<p class="code">
int cupsGetPrinters (<br>
char ***printers<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>printers</dt>
<dd class="description">Printers</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of printers</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function is deprecated - use <a href="#cupsGetDests"><code>cupsGetDests</code></a> instead.
</p>
<h3 class="function"><span class="info"> CUPS 1.3/OS X 10.5 </span><a name="cupsGetServerPPD">cupsGetServerPPD</a></h3>
<p class="description">Get an available PPD file from the server.</p>
<p class="code">
char *cupsGetServerPPD (<br>
http_t *http,<br>
const char *name<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Name of PPD file ("ppd-name")</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Name of PPD file or <code>NULL</code> on error</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function returns the named PPD file from the server. The
list of available PPDs is provided by the IPP <code>CUPS_GET_PPDS</code>
operation.<br>
<br>
You must remove (unlink) the PPD file when you are finished with
it. The PPD filename is stored in a static location that will be
overwritten on the next call to <a href="#cupsGetPPD"><code>cupsGetPPD</code></a>, <a href="#cupsGetPPD2"><code>cupsGetPPD2</code></a>,
or <a href="#cupsGetServerPPD"><code>cupsGetServerPPD</code></a>.
</p>
<h3 class="function"><a name="cupsLangDefault">cupsLangDefault</a></h3>
<p class="description">Return the default language.</p>
<p class="code">
cups_lang_t *cupsLangDefault (void);</p>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Language data</p>
<h3 class="function"><a name="cupsLangEncoding">cupsLangEncoding</a></h3>
<p class="description">Return the character encoding (us-ascii, etc.)
for the given language.</p>
<p class="code">
const char *cupsLangEncoding (<br>
cups_lang_t *lang<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>lang</dt>
<dd class="description">Language data</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Character encoding</p>
<h3 class="function"><a name="cupsLangFlush">cupsLangFlush</a></h3>
<p class="description">Flush all language data out of the cache.</p>
<p class="code">
void cupsLangFlush (void);</p>
<h3 class="function"><a name="cupsLangFree">cupsLangFree</a></h3>
<p class="description">Free language data.</p>
<p class="code">
void cupsLangFree (<br>
cups_lang_t *lang<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>lang</dt>
<dd class="description">Language to free</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This does not actually free anything; use <a href="#cupsLangFlush"><code>cupsLangFlush</code></a> for that.</p>
<h3 class="function"><a name="cupsLangGet">cupsLangGet</a></h3>
<p class="description">Get a language.</p>
<p class="code">
cups_lang_t *cupsLangGet (<br>
const char *language<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>language</dt>
<dd class="description">Language or locale</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Language data</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsLocalizeDestOption">cupsLocalizeDestOption</a></h3>
<p class="description">Get the localized string for a destination
option.</p>
<p class="code">
const char *cupsLocalizeDestOption (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
const char *option<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>option</dt>
<dd class="description">Option to localize</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Localized string</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned string is stored in the destination information and will become
invalid if the destination information is deleted.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsLocalizeDestValue">cupsLocalizeDestValue</a></h3>
<p class="description">Get the localized string for a destination
option+value pair.</p>
<p class="code">
const char *cupsLocalizeDestValue (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *dinfo,<br>
const char *option,<br>
const char *value<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>dinfo</dt>
<dd class="description">Destination information</dd>
<dt>option</dt>
<dd class="description">Option to localize</dd>
<dt>value</dt>
<dd class="description">Value to localize</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Localized string</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned string is stored in the destination information and will become
invalid if the destination information is deleted.
</p>
<h3 class="function"><span class="info"> CUPS 1.2/OS X 10.5 </span><a name="cupsNotifySubject">cupsNotifySubject</a></h3>
<p class="description">Return the subject for the given notification message.</p>
<p class="code">
char *cupsNotifySubject (<br>
cups_lang_t *lang,<br>
ipp_t *event<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>lang</dt>
<dd class="description">Language data</dd>
<dt>event</dt>
<dd class="description">Event data</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Subject string or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned string must be freed by the caller using <code>free</code>.
</p>
<h3 class="function"><span class="info"> CUPS 1.2/OS X 10.5 </span><a name="cupsNotifyText">cupsNotifyText</a></h3>
<p class="description">Return the text for the given notification message.</p>
<p class="code">
char *cupsNotifyText (<br>
cups_lang_t *lang,<br>
ipp_t *event<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>lang</dt>
<dd class="description">Language data</dd>
<dt>event</dt>
<dd class="description">Event data</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Message text or <code>NULL</code></p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The returned string must be freed by the caller using <code>free</code>.
</p>
<h3 class="function"><a name="cupsParseOptions">cupsParseOptions</a></h3>
<p class="description">Parse options from a command-line argument.</p>
<p class="code">
int cupsParseOptions (<br>
const char *arg,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> **options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>arg</dt>
<dd class="description">Argument to parse</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Options found</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Number of options found</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function converts space-delimited name/value pairs according
to the PAPI text option ABNF specification. Collection values
("name={a=... b=... c=...}") are stored with the curley brackets
intact - use <code>cupsParseOptions</code> on the value to extract the
collection attributes.</p>
<h3 class="function"><a name="cupsPrintFile">cupsPrintFile</a></h3>
<p class="description">Print a file to a printer or class on the default server.</p>
<p class="code">
int cupsPrintFile (<br>
const char *name,<br>
const char *filename,<br>
const char *title,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>filename</dt>
<dd class="description">File to print</dd>
<dt>title</dt>
<dd class="description">Title of job</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Job ID or 0 on error</p>
<h3 class="function"><span class="info"> CUPS 1.1.21/OS X 10.4 </span><a name="cupsPrintFile2">cupsPrintFile2</a></h3>
<p class="description">Print a file to a printer or class on the specified
server.</p>
<p class="code">
int cupsPrintFile2 (<br>
http_t *http,<br>
const char *name,<br>
const char *filename,<br>
const char *title,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server</dd>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>filename</dt>
<dd class="description">File to print</dd>
<dt>title</dt>
<dd class="description">Title of job</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Job ID or 0 on error</p>
<h3 class="function"><a name="cupsPrintFiles">cupsPrintFiles</a></h3>
<p class="description">Print one or more files to a printer or class on the
default server.</p>
<p class="code">
int cupsPrintFiles (<br>
const char *name,<br>
int num_files,<br>
const char **files,<br>
const char *title,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>num_files</dt>
<dd class="description">Number of files</dd>
<dt>files</dt>
<dd class="description">File(s) to print</dd>
<dt>title</dt>
<dd class="description">Title of job</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Job ID or 0 on error</p>
<h3 class="function"><span class="info"> CUPS 1.1.21/OS X 10.4 </span><a name="cupsPrintFiles2">cupsPrintFiles2</a></h3>
<p class="description">Print one or more files to a printer or class on the
specified server.</p>
<p class="code">
int cupsPrintFiles2 (<br>
http_t *http,<br>
const char *name,<br>
int num_files,<br>
const char **files,<br>
const char *title,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>num_files</dt>
<dd class="description">Number of files</dd>
<dt>files</dt>
<dd class="description">File(s) to print</dd>
<dt>title</dt>
<dd class="description">Title of job</dd>
<dt>num_options</dt>
<dd class="description">Number of options</dd>
<dt>options</dt>
<dd class="description">Options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Job ID or 0 on error</p>
<h3 class="function"><span class="info"> CUPS 1.3/OS X 10.5 </span><a name="cupsRemoveDest">cupsRemoveDest</a></h3>
<p class="description">Remove a destination from the destination list.</p>
<p class="code">
int cupsRemoveDest (<br>
const char *name,<br>
const char *instance,<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> **dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>instance</dt>
<dd class="description">Instance name or <code>NULL</code></dd>
<dt>num_dests</dt>
<dd class="description">Number of destinations</dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">New number of destinations</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Removing a destination/instance does not delete the class or printer
queue, merely the lpoptions for that destination/instance. Use the
<a href="#cupsSetDests"><code>cupsSetDests</code></a> or <a href="#cupsSetDests2"><code>cupsSetDests2</code></a> functions to save the new
options for the user.
</p>
<h3 class="function"><span class="info"> CUPS 1.2/OS X 10.5 </span><a name="cupsRemoveOption">cupsRemoveOption</a></h3>
<p class="description">Remove an option from an option array.</p>
<p class="code">
int cupsRemoveOption (<br>
const char *name,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> **options<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Option name</dd>
<dt>num_options</dt>
<dd class="description">Current number of options</dd>
<dt>options</dt>
<dd class="description">Options</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">New number of options</p>
<h3 class="function"><a name="cupsServer">cupsServer</a></h3>
<p class="description">Return the hostname/address of the current server.</p>
<p class="code">
const char *cupsServer (void);</p>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Server name</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The default server comes from the CUPS_SERVER environment variable, then the
~/.cups/client.conf file, and finally the /etc/cups/client.conf file. If not
set, the default is the local system - either "localhost" or a domain socket
path.<br>
<br>
The returned value can be a fully-qualified hostname, a numeric IPv4 or IPv6
address, or a domain socket pathname.<br>
<br>
Note: The current server is tracked separately for each thread in a program.
Multi-threaded programs that override the server via the
<a href="#cupsSetServer"><code>cupsSetServer</code></a> function need to do so in each thread for the same
server to be used.</p>
<h3 class="function"><span class="info"> CUPS 1.5/OS X 10.7 </span><a name="cupsSetClientCertCB">cupsSetClientCertCB</a></h3>
<p class="description">Set the client certificate callback.</p>
<p class="code">
void cupsSetClientCertCB (<br>
<a href="#cups_client_cert_cb_t">cups_client_cert_cb_t</a> cb,<br>
void *user_data<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>cb</dt>
<dd class="description">Callback function</dd>
<dt>user_data</dt>
<dd class="description">User data pointer</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Pass <code>NULL</code> to restore the default callback.<br>
<br>
Note: The current certificate callback is tracked separately for each thread
in a program. Multi-threaded programs that override the callback need to do
so in each thread for the same callback to be used.
</p>
<h3 class="function"><span class="info"> CUPS 1.5/OS X 10.7 </span><a name="cupsSetCredentials">cupsSetCredentials</a></h3>
<p class="description">Set the default credentials to be used for SSL/TLS
connections.</p>
<p class="code">
int cupsSetCredentials (<br>
cups_array_t *credentials<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>credentials</dt>
<dd class="description">Array of credentials</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Status of call (0 = success)</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Note: The default credentials are tracked separately for each thread in a
program. Multi-threaded programs that override the setting need to do so in
each thread for the same setting to be used.
</p>
<h3 class="function"><span class="info"> CUPS 1.3/OS X 10.5 </span><a name="cupsSetDefaultDest">cupsSetDefaultDest</a></h3>
<p class="description">Set the default destination.</p>
<p class="code">
void cupsSetDefaultDest (<br>
const char *name,<br>
const char *instance,<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>instance</dt>
<dd class="description">Instance name or <code>NULL</code></dd>
<dt>num_dests</dt>
<dd class="description">Number of destinations</dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h3 class="function"><a name="cupsSetDests">cupsSetDests</a></h3>
<p class="description">Save the list of destinations for the default server.</p>
<p class="code">
void cupsSetDests (<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>num_dests</dt>
<dd class="description">Number of destinations</dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function saves the destinations to /etc/cups/lpoptions when run
as root and ~/.cups/lpoptions when run as a normal user.</p>
<h3 class="function"><span class="info"> CUPS 1.1.21/OS X 10.4 </span><a name="cupsSetDests2">cupsSetDests2</a></h3>
<p class="description">Save the list of destinations for the specified server.</p>
<p class="code">
int cupsSetDests2 (<br>
http_t *http,<br>
int num_dests,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dests<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>num_dests</dt>
<dd class="description">Number of destinations</dd>
<dt>dests</dt>
<dd class="description">Destinations</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">0 on success, -1 on error</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function saves the destinations to /etc/cups/lpoptions when run
as root and ~/.cups/lpoptions when run as a normal user.
</p>
<h3 class="function"><a name="cupsSetEncryption">cupsSetEncryption</a></h3>
<p class="description">Set the encryption preference.</p>
<p class="code">
void cupsSetEncryption (<br>
http_encryption_t e<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>e</dt>
<dd class="description">New encryption preference</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The default encryption setting comes from the CUPS_ENCRYPTION
environment variable, then the ~/.cups/client.conf file, and finally the
/etc/cups/client.conf file. If not set, the default is
<code>HTTP_ENCRYPTION_IF_REQUESTED</code>.<br>
<br>
Note: The current encryption setting is tracked separately for each thread
in a program. Multi-threaded programs that override the setting need to do
so in each thread for the same setting to be used.</p>
<h3 class="function"><a name="cupsSetPasswordCB">cupsSetPasswordCB</a></h3>
<p class="description">Set the password callback for CUPS.</p>
<p class="code">
void cupsSetPasswordCB (<br>
<a href="#cups_password_cb_t">cups_password_cb_t</a> cb<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>cb</dt>
<dd class="description">Callback function</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Pass <code>NULL</code> to restore the default (console) password callback, which
reads the password from the console. Programs should call either this
function or <a href="#cupsSetPasswordCB2"><code>cupsSetPasswordCB2</code></a>, as only one callback can be registered
by a program per thread.<br>
<br>
Note: The current password callback is tracked separately for each thread
in a program. Multi-threaded programs that override the callback need to do
so in each thread for the same callback to be used.</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsSetPasswordCB2">cupsSetPasswordCB2</a></h3>
<p class="description">Set the advanced password callback for CUPS.</p>
<p class="code">
void cupsSetPasswordCB2 (<br>
<a href="#cups_password_cb2_t">cups_password_cb2_t</a> cb,<br>
void *user_data<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>cb</dt>
<dd class="description">Callback function</dd>
<dt>user_data</dt>
<dd class="description">User data pointer</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Pass <code>NULL</code> to restore the default (console) password callback, which
reads the password from the console. Programs should call either this
function or <a href="#cupsSetPasswordCB2"><code>cupsSetPasswordCB2</code></a>, as only one callback can be registered
by a program per thread.<br>
<br>
Note: The current password callback is tracked separately for each thread
in a program. Multi-threaded programs that override the callback need to do
so in each thread for the same callback to be used.
</p>
<h3 class="function"><a name="cupsSetServer">cupsSetServer</a></h3>
<p class="description">Set the default server name and port.</p>
<p class="code">
void cupsSetServer (<br>
const char *server<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>server</dt>
<dd class="description">Server name</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The "server" string can be a fully-qualified hostname, a numeric
IPv4 or IPv6 address, or a domain socket pathname. Hostnames and numeric IP
addresses can be optionally followed by a colon and port number to override
the default port 631, e.g. "hostname:8631". Pass <code>NULL</code> to restore the
default server name and port.<br>
<br>
Note: The current server is tracked separately for each thread in a program.
Multi-threaded programs that override the server need to do so in each
thread for the same server to be used.</p>
<h3 class="function"><span class="info"> CUPS 1.5/OS X 10.7 </span><a name="cupsSetServerCertCB">cupsSetServerCertCB</a></h3>
<p class="description">Set the server certificate callback.</p>
<p class="code">
void cupsSetServerCertCB (<br>
<a href="#cups_server_cert_cb_t">cups_server_cert_cb_t</a> cb,<br>
void *user_data<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>cb</dt>
<dd class="description">Callback function</dd>
<dt>user_data</dt>
<dd class="description">User data pointer</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Pass <code>NULL</code> to restore the default callback.<br>
<br>
Note: The current credentials callback is tracked separately for each thread
in a program. Multi-threaded programs that override the callback need to do
so in each thread for the same callback to be used.
</p>
<h3 class="function"><a name="cupsSetUser">cupsSetUser</a></h3>
<p class="description">Set the default user name.</p>
<p class="code">
void cupsSetUser (<br>
const char *user<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>user</dt>
<dd class="description">User name</dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Pass <code>NULL</code> to restore the default user name.<br>
<br>
Note: The current user name is tracked separately for each thread in a
program. Multi-threaded programs that override the user name need to do so
in each thread for the same user name to be used.</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsSetUserAgent">cupsSetUserAgent</a></h3>
<p class="description">Set the default HTTP User-Agent string.</p>
<p class="code">
void cupsSetUserAgent (<br>
const char *user_agent<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>user_agent</dt>
<dd class="description">User-Agent string or <code>NULL</code></dd>
</dl>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Setting the string to NULL forces the default value containing the CUPS
version, IPP version, and operating system version and architecture.
</p>
<h3 class="function"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cupsStartDestDocument">cupsStartDestDocument</a></h3>
<p class="description">Start a new document.</p>
<p class="code">
http_status_t cupsStartDestDocument (<br>
http_t *http,<br>
<a href="#cups_dest_t">cups_dest_t</a> *dest,<br>
<a href="#cups_dinfo_t">cups_dinfo_t</a> *info,<br>
int job_id,<br>
const char *docname,<br>
const char *format,<br>
int num_options,<br>
<a href="#cups_option_t">cups_option_t</a> *options,<br>
int last_document<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to destination</dd>
<dt>dest</dt>
<dd class="description">Destination</dd>
<dt>info</dt>
<dd class="description">Destination information</dd>
<dt>job_id</dt>
<dd class="description">Job ID</dd>
<dt>docname</dt>
<dd class="description">Document name</dd>
<dt>format</dt>
<dd class="description">Document format</dd>
<dt>num_options</dt>
<dd class="description">Number of document options</dd>
<dt>options</dt>
<dd class="description">Document options</dd>
<dt>last_document</dt>
<dd class="description">1 if this is the last document</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Status of document creation</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">"job_id" is the job ID returned by cupsCreateDestJob. "docname" is the name
of the document/file being printed, "format" is the MIME media type for the
document (see CUPS_FORMAT_xxx constants), and "num_options" and "options"
are the options do be applied to the document. "last_document" should be 1
if this is the last document to be submitted in the job. Returns
<code>HTTP_CONTINUE</code> on success.
</p>
<h3 class="function"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cupsStartDocument">cupsStartDocument</a></h3>
<p class="description">Add a document to a job created with cupsCreateJob().</p>
<p class="code">
http_status_t cupsStartDocument (<br>
http_t *http,<br>
const char *name,<br>
int job_id,<br>
const char *docname,<br>
const char *format,<br>
int last_document<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>http</dt>
<dd class="description">Connection to server or <code>CUPS_HTTP_DEFAULT</code></dd>
<dt>name</dt>
<dd class="description">Destination name</dd>
<dt>job_id</dt>
<dd class="description">Job ID from <a href="#cupsCreateJob"><code>cupsCreateJob</code></a></dd>
<dt>docname</dt>
<dd class="description">Name of document</dd>
<dt>format</dt>
<dd class="description">MIME type or <code>CUPS_FORMAT_foo</code></dd>
<dt>last_document</dt>
<dd class="description">1 for last document in job, 0 otherwise</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">HTTP status of request</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Use <a href="#cupsWriteRequestData"><code>cupsWriteRequestData</code></a> to write data for the document and
<a href="#cupsFinishDocument"><code>cupsFinishDocument</code></a> to finish the document and get the submission status.<br>
<br>
The MIME type constants <code>CUPS_FORMAT_AUTO</code>, <code>CUPS_FORMAT_PDF</code>,
<code>CUPS_FORMAT_POSTSCRIPT</code>, <code>CUPS_FORMAT_RAW</code>, and
<code>CUPS_FORMAT_TEXT</code> are provided for the "format" argument, although
any supported MIME type string can be supplied.
</p>
<h3 class="function"><a name="cupsTempFd">cupsTempFd</a></h3>
<p class="description">Creates a temporary file.</p>
<p class="code">
int cupsTempFd (<br>
char *filename,<br>
int len<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>filename</dt>
<dd class="description">Pointer to buffer</dd>
<dt>len</dt>
<dd class="description">Size of buffer</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">New file descriptor or -1 on error</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The temporary filename is returned in the filename buffer.
The temporary file is opened for reading and writing.</p>
<h3 class="function"><span class="info"> DEPRECATED </span><a name="cupsTempFile">cupsTempFile</a></h3>
<p class="description">Generates a temporary filename.</p>
<p class="code">
char *cupsTempFile (<br>
char *filename,<br>
int len<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>filename</dt>
<dd class="description">Pointer to buffer</dd>
<dt>len</dt>
<dd class="description">Size of buffer</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Filename or <code>NULL</code> on error</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The temporary filename is returned in the filename buffer.
This function is deprecated - use <a href="#cupsTempFd"><code>cupsTempFd</code></a> or
<a href="#cupsTempFile2"><code>cupsTempFile2</code></a> instead.
</p>
<h3 class="function"><span class="info"> CUPS 1.2/OS X 10.5 </span><a name="cupsTempFile2">cupsTempFile2</a></h3>
<p class="description">Creates a temporary CUPS file.</p>
<p class="code">
cups_file_t *cupsTempFile2 (<br>
char *filename,<br>
int len<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>filename</dt>
<dd class="description">Pointer to buffer</dd>
<dt>len</dt>
<dd class="description">Size of buffer</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">CUPS file or <code>NULL</code> on error</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The temporary filename is returned in the filename buffer.
The temporary file is opened for writing.
</p>
<h3 class="function"><a name="cupsUser">cupsUser</a></h3>
<p class="description">Return the current user's name.</p>
<p class="code">
const char *cupsUser (void);</p>
<h4 class="returnvalue">Return Value</h4>
<p class="description">User name</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">Note: The current user name is tracked separately for each thread in a
program. Multi-threaded programs that override the user name with the
<a href="#cupsSetUser"><code>cupsSetUser</code></a> function need to do so in each thread for the same user
name to be used.</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="cupsUserAgent">cupsUserAgent</a></h3>
<p class="description">Return the default HTTP User-Agent string.</p>
<p class="code">
const char *cupsUserAgent (void);</p>
<h4 class="returnvalue">Return Value</h4>
<p class="description">User-Agent string</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="pwgFormatSizeName">pwgFormatSizeName</a></h3>
<p class="description">Generate a PWG self-describing media size name.</p>
<p class="code">
int pwgFormatSizeName (<br>
char *keyword,<br>
size_t keysize,<br>
const char *prefix,<br>
const char *name,<br>
int width,<br>
int length,<br>
const char *units<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>keyword</dt>
<dd class="description">Keyword buffer</dd>
<dt>keysize</dt>
<dd class="description">Size of keyword buffer</dd>
<dt>prefix</dt>
<dd class="description">Prefix for PWG size or <code>NULL</code> for automatic</dd>
<dt>name</dt>
<dd class="description">Size name or <code>NULL</code></dd>
<dt>width</dt>
<dd class="description">Width of page in 2540ths</dd>
<dt>length</dt>
<dd class="description">Length of page in 2540ths</dd>
<dt>units</dt>
<dd class="description">Units - "in", "mm", or <code>NULL</code> for automatic</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 on success, 0 on failure</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function generates a PWG self-describing media size name of the form
"prefix_name_WIDTHxLENGTHunits". The prefix is typically "custom" or "roll"
for user-supplied sizes but can also be "disc", "iso", "jis", "jpn", "na",
"oe", "om", "prc", or "roc". A value of <code>NULL</code> automatically chooses
"oe" or "om" depending on the units.<br>
<br>
The size name may only contain lowercase letters, numbers, "-", and ".". If
<code>NULL</code> is passed, the size name will contain the formatted dimensions.<br>
<br>
The width and length are specified in hundredths of millimeters, equivalent
to 1/100000th of a meter or 1/2540th of an inch. The width, length, and
units used for the generated size name are calculated automatically if the
units string is <code>NULL</code>, otherwise inches ("in") or millimeters ("mm")
are used.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="pwgInitSize">pwgInitSize</a></h3>
<p class="description">Initialize a pwg_size_t structure using IPP Job Template
attributes.</p>
<p class="code">
int pwgInitSize (<br>
<a href="#pwg_size_t">pwg_size_t</a> *size,<br>
ipp_t *job,<br>
int *margins_set<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>size</dt>
<dd class="description">Size to initialize</dd>
<dt>job</dt>
<dd class="description">Job template attributes</dd>
<dt>margins_set</dt>
<dd class="description">1 if margins were set, 0 otherwise</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">1 if size was initialized, 0 otherwise</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">This function initializes a pwg_size_t structure from an IPP "media" or
"media-col" attribute in the specified IPP message. 0 is returned if neither
attribute is found in the message or the values are not valid.<br>
<br>
The "margins_set" variable is initialized to 1 if any "media-xxx-margin"
member attribute was specified in the "media-col" Job Template attribute,
otherwise it is initialized to 0.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="pwgMediaForLegacy">pwgMediaForLegacy</a></h3>
<p class="description">Find a PWG media size by ISO/IPP legacy name.</p>
<p class="code">
<a href="#pwg_media_t">pwg_media_t</a> *pwgMediaForLegacy (<br>
const char *legacy<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>legacy</dt>
<dd class="description">Legacy size name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Matching size or NULL</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The "name" argument specifies the legacy ISO media size name, for example
"iso-a4" or "na-letter".
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="pwgMediaForPPD">pwgMediaForPPD</a></h3>
<p class="description">Find a PWG media size by Adobe PPD name.</p>
<p class="code">
<a href="#pwg_media_t">pwg_media_t</a> *pwgMediaForPPD (<br>
const char *ppd<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>ppd</dt>
<dd class="description">PPD size name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Matching size or NULL</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The "ppd" argument specifies an Adobe page size name as defined in Table B.1
of the Adobe PostScript Printer Description File Format Specification Version
4.3.<br>
<br>
If the name is non-standard, the returned PWG media size is stored in
thread-local storage and is overwritten by each call to the function in the
thread. Custom names can be of the form "Custom.WIDTHxLENGTH[units]" or
"WIDTHxLENGTH[units]".
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="pwgMediaForPWG">pwgMediaForPWG</a></h3>
<p class="description">Find a PWG media size by 5101.1 self-describing name.</p>
<p class="code">
<a href="#pwg_media_t">pwg_media_t</a> *pwgMediaForPWG (<br>
const char *pwg<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>pwg</dt>
<dd class="description">PWG size name</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">Matching size or NULL</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The "pwg" argument specifies a self-describing media size name of the form
"prefix_name_WIDTHxLENGTHunits" as defined in PWG 5101.1.<br>
<br>
If the name is non-standard, the returned PWG media size is stored in
thread-local storage and is overwritten by each call to the function in the
thread.
</p>
<h3 class="function"><span class="info"> CUPS 1.7 </span><a name="pwgMediaForSize">pwgMediaForSize</a></h3>
<p class="description">Get the PWG media size for the given dimensions.</p>
<p class="code">
<a href="#pwg_media_t">pwg_media_t</a> *pwgMediaForSize (<br>
int width,<br>
int length<br>
);</p>
<h4 class="parameters">Parameters</h4>
<dl>
<dt>width</dt>
<dd class="description">Width in hundredths of millimeters</dd>
<dt>length</dt>
<dd class="description">Length in hundredths of millimeters</dd>
</dl>
<h4 class="returnvalue">Return Value</h4>
<p class="description">PWG media name</p>
<h4 class="discussion">Discussion</h4>
<p class="discussion">The "width" and "length" are in hundredths of millimeters, equivalent to
1/100000th of a meter or 1/2540th of an inch.<br>
<br>
If the dimensions are non-standard, the returned PWG media size is stored in
thread-local storage and is overwritten by each call to the function in the
thread.
</p>
<h2 class="title"><a name="TYPES">Data Types</a></h2>
<h3 class="typedef"><span class="info"> CUPS 1.5/OS X 10.7 </span><a name="cups_client_cert_cb_t">cups_client_cert_cb_t</a></h3>
<p class="description">Client credentials callback
</p>
<p class="code">
typedef int (*cups_client_cert_cb_t)(http_t *http, void *tls, cups_array_t *distinguished_names, void *user_data);
</p>
<h3 class="typedef"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cups_dest_block_t">cups_dest_block_t</a></h3>
<p class="description">Destination enumeration block
</p>
<p class="code">
typedef int (*cups_dest_block_t(unsigned flags, <a href="#cups_dest_t">cups_dest_t</a> *dest);
</p>
<h3 class="typedef"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cups_dest_cb_t">cups_dest_cb_t</a></h3>
<p class="description">Destination enumeration callback
</p>
<p class="code">
typedef int (*cups_dest_cb_t)(void *user_data, unsigned flags, <a href="#cups_dest_t">cups_dest_t</a> *dest);
</p>
<h3 class="typedef"><a name="cups_dest_t">cups_dest_t</a></h3>
<p class="description">Destination</p>
<p class="code">
typedef struct <a href="#cups_dest_s">cups_dest_s</a> cups_dest_t;
</p>
<h3 class="typedef"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cups_device_cb_t">cups_device_cb_t</a></h3>
<p class="description">Device callback
</p>
<p class="code">
typedef void (*cups_device_cb_t)(const char *device_class, const char *device_id, const char *device_info, const char *device_make_and_model, const char *device_uri, const char *device_location, void *user_data);
</p>
<h3 class="typedef"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cups_dinfo_t">cups_dinfo_t</a></h3>
<p class="description">Destination capability and status
information </p>
<p class="code">
typedef struct _cups_dinfo_s cups_dinfo_t;
</p>
<h3 class="typedef"><a name="cups_job_t">cups_job_t</a></h3>
<p class="description">Job</p>
<p class="code">
typedef struct <a href="#cups_job_s">cups_job_s</a> cups_job_t;
</p>
<h3 class="typedef"><a name="cups_option_t">cups_option_t</a></h3>
<p class="description">Printer Options</p>
<p class="code">
typedef struct <a href="#cups_option_s">cups_option_s</a> cups_option_t;
</p>
<h3 class="typedef"><span class="info"> CUPS 1.4/OS X 10.6 </span><a name="cups_password_cb2_t">cups_password_cb2_t</a></h3>
<p class="description">New password callback
</p>
<p class="code">
typedef const char *(*cups_password_cb2_t)(const char *prompt, http_t *http, const char *method, const char *resource, void *user_data);
</p>
<h3 class="typedef"><a name="cups_password_cb_t">cups_password_cb_t</a></h3>
<p class="description">Password callback</p>
<p class="code">
typedef const char *(*cups_password_cb_t)(const char *prompt);
</p>
<h3 class="typedef"><a name="cups_ptype_t">cups_ptype_t</a></h3>
<p class="description">Printer type/capability bits</p>
<p class="code">
typedef unsigned cups_ptype_t;
</p>
<h3 class="typedef"><span class="info"> CUPS 1.5/OS X 10.7 </span><a name="cups_server_cert_cb_t">cups_server_cert_cb_t</a></h3>
<p class="description">Server credentials callback
</p>
<p class="code">
typedef int (*cups_server_cert_cb_t)(http_t *http, void *tls, cups_array_t *certs, void *user_data);
</p>
<h3 class="typedef"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cups_size_t">cups_size_t</a></h3>
<p class="description">Media Size </p>
<p class="code">
typedef struct <a href="#cups_size_s">cups_size_s</a> cups_size_t;
</p>
<h3 class="typedef"><a name="pwg_map_t">pwg_map_t</a></h3>
<p class="description">Map element - PPD to/from PWG</p>
<p class="code">
typedef struct <a href="#pwg_map_s">pwg_map_s</a> pwg_map_t;
</p>
<h3 class="typedef"><a name="pwg_media_t">pwg_media_t</a></h3>
<p class="description">Common media size data</p>
<p class="code">
typedef struct <a href="#pwg_media_s">pwg_media_s</a> pwg_media_t;
</p>
<h3 class="typedef"><a name="pwg_size_t">pwg_size_t</a></h3>
<p class="description">Size element - PPD to/from PWG</p>
<p class="code">
typedef struct <a href="#pwg_size_s">pwg_size_s</a> pwg_size_t;
</p>
<h2 class="title"><a name="STRUCTURES">Structures</a></h2>
<h3 class="struct"><a name="cups_dest_s">cups_dest_s</a></h3>
<p class="description">Destination</p>
<p class="code">struct cups_dest_s {<br>
char *name, *instance;<br>
int is_default;<br>
int num_options;<br>
<a href="#cups_option_t">cups_option_t</a> *options;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>instance </dt>
<dd class="description">Local instance name or NULL</dd>
<dt>is_default </dt>
<dd class="description">Is this printer the default?</dd>
<dt>num_options </dt>
<dd class="description">Number of options</dd>
<dt>options </dt>
<dd class="description">Options</dd>
</dl>
<h3 class="struct"><a name="cups_job_s">cups_job_s</a></h3>
<p class="description">Job</p>
<p class="code">struct cups_job_s {<br>
time_t completed_time;<br>
time_t creation_time;<br>
char *dest;<br>
char *format;<br>
int id;<br>
int priority;<br>
time_t processing_time;<br>
int size;<br>
ipp_jstate_t state;<br>
char *title;<br>
char *user;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>completed_time </dt>
<dd class="description">Time the job was completed</dd>
<dt>creation_time </dt>
<dd class="description">Time the job was created</dd>
<dt>dest </dt>
<dd class="description">Printer or class name</dd>
<dt>format </dt>
<dd class="description">Document format</dd>
<dt>id </dt>
<dd class="description">The job ID</dd>
<dt>priority </dt>
<dd class="description">Priority (1-100)</dd>
<dt>processing_time </dt>
<dd class="description">Time the job was processed</dd>
<dt>size </dt>
<dd class="description">Size in kilobytes</dd>
<dt>state </dt>
<dd class="description">Job state</dd>
<dt>title </dt>
<dd class="description">Title/job name</dd>
<dt>user </dt>
<dd class="description">User the submitted the job</dd>
</dl>
<h3 class="struct"><a name="cups_option_s">cups_option_s</a></h3>
<p class="description">Printer Options</p>
<p class="code">struct cups_option_s {<br>
char *name;<br>
char *value;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>name </dt>
<dd class="description">Name of option</dd>
<dt>value </dt>
<dd class="description">Value of option</dd>
</dl>
<h3 class="struct"><span class="info"> CUPS 1.6/OS X 10.8 </span><a name="cups_size_s">cups_size_s</a></h3>
<p class="description">Media Size </p>
<p class="code">struct cups_size_s {<br>
char media[128];<br>
int width, length, bottom, left, right, top;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>media[128] </dt>
<dd class="description">Media name to use</dd>
<dt>top </dt>
<dd class="description">Top margin in hundredths of
millimeters</dd>
</dl>
<h3 class="struct"><a name="pollfd">pollfd</a></h3>
<p class="description">User data (unused)</p>
<p class="code">struct pollfd *pollfds, unsigned int num_pollfds, int timeout, void *context) {<br>
_cups_dnssd_data_t *data;<br>
else if(val 0) data - got_data;<br>
void) timeout;<br>
int val;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>data </dt>
<dd class="description">Enumeration data</dd>
<dt>got_data </dt>
<dt>timeout </dt>
<dt>val </dt>
<dd class="description">Return value</dd>
</dl>
<h3 class="struct"><a name="pwg_map_s">pwg_map_s</a></h3>
<p class="description">Map element - PPD to/from PWG</p>
<p class="code">struct pwg_map_s {<br>
char *pwg, *ppd;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>ppd </dt>
<dd class="description">PPD option keyword</dd>
</dl>
<h3 class="struct"><a name="pwg_media_s">pwg_media_s</a></h3>
<p class="description">Common media size data</p>
<p class="code">struct pwg_media_s {<br>
int width, length;<br>
const char *pwg, *legacy, *ppd;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>length </dt>
<dd class="description">Length in 2540ths</dd>
<dt>ppd </dt>
<dd class="description">Standard Adobe PPD name</dd>
</dl>
<h3 class="struct"><a name="pwg_size_s">pwg_size_s</a></h3>
<p class="description">Size element - PPD to/from PWG</p>
<p class="code">struct pwg_size_s {<br>
<a href="#pwg_map_t">pwg_map_t</a> map;<br>
int width, length, left, bottom, right, top;<br>
};</p>
<h4 class="members">Members</h4>
<dl>
<dt>map </dt>
<dd class="description">Map element</dd>
<dt>top </dt>
<dd class="description">Top margin in 2540ths</dd>
</dl>
<h2 class="title"><a name="VARIABLES">Variables</a></h2>
<h3 class="variable"><a name="CF_RETURNS_RETAINED">CF_RETURNS_RETAINED</a></h3>
<p class="description">Get the Apple language identifier associated with a
locale ID.</p>
<p class="code">const char *locale) CF_RETURNS_RETAINED;</p>
<h2 class="title"><a name="ENUMERATIONS">Constants</a></h2>
<h3 class="enumeration"><a name="cups_ptype_e">cups_ptype_e</a></h3>
<p class="description">Printer type/capability bit
constants</p>
<h4 class="constants">Constants</h4>
<dl>
<dt>CUPS_PRINTER_AUTHENTICATED <span class="info"> CUPS 1.2/OS X 10.5 </span></dt>
<dd class="description">Printer requires authentication
</dd>
<dt>CUPS_PRINTER_BIND </dt>
<dd class="description">Can bind output</dd>
<dt>CUPS_PRINTER_BW </dt>
<dd class="description">Can do B&W printing</dd>
<dt>CUPS_PRINTER_CLASS </dt>
<dd class="description">Printer class</dd>
<dt>CUPS_PRINTER_COLLATE </dt>
<dd class="description">Can collage copies</dd>
<dt>CUPS_PRINTER_COLOR </dt>
<dd class="description">Can do color printing</dd>
<dt>CUPS_PRINTER_COMMANDS <span class="info"> CUPS 1.2/OS X 10.5 </span></dt>
<dd class="description">Printer supports maintenance commands
</dd>
<dt>CUPS_PRINTER_COPIES </dt>
<dd class="description">Can do copies</dd>
<dt>CUPS_PRINTER_COVER </dt>
<dd class="description">Can cover output</dd>
<dt>CUPS_PRINTER_DEFAULT </dt>
<dd class="description">Default printer on network</dd>
<dt>CUPS_PRINTER_DELETE <span class="info"> CUPS 1.2/OS X 10.5 </span></dt>
<dd class="description">Delete printer
</dd>
<dt>CUPS_PRINTER_DUPLEX </dt>
<dd class="description">Can do duplexing</dd>
<dt>CUPS_PRINTER_FAX </dt>
<dd class="description">Fax queue</dd>
<dt>CUPS_PRINTER_LARGE </dt>
<dd class="description">Can do D/E/A1/A0</dd>
<dt>CUPS_PRINTER_LOCAL </dt>
<dd class="description">Local printer or class</dd>
<dt>CUPS_PRINTER_MEDIUM </dt>
<dd class="description">Can do Tabloid/B/C/A3/A2</dd>
<dt>CUPS_PRINTER_MFP <span class="info"> CUPS 1.4/OS X 10.6 </span></dt>
<dd class="description">Printer with scanning capabilities
</dd>
<dt>CUPS_PRINTER_NOT_SHARED <span class="info"> CUPS 1.2/OS X 10.5 </span></dt>
<dd class="description">Printer is not shared
</dd>
<dt>CUPS_PRINTER_PUNCH </dt>
<dd class="description">Can punch output</dd>
<dt>CUPS_PRINTER_REJECTING </dt>
<dd class="description">Printer is rejecting jobs</dd>
<dt>CUPS_PRINTER_REMOTE </dt>
<dd class="description">Remote printer or class</dd>
<dt>CUPS_PRINTER_SCANNER <span class="info"> CUPS 1.4/OS X 10.6 </span></dt>
<dd class="description">Scanner-only device
</dd>
<dt>CUPS_PRINTER_SMALL </dt>
<dd class="description">Can do Letter/Legal/A4</dd>
<dt>CUPS_PRINTER_SORT </dt>
<dd class="description">Can sort output</dd>
<dt>CUPS_PRINTER_STAPLE </dt>
<dd class="description">Can staple output</dd>
<dt>CUPS_PRINTER_VARIABLE </dt>
<dd class="description">Can do variable sizes</dd>
</dl>
</div>
</body>
</html>
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