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119 lines
5.7 KiB
HTML
119 lines
5.7 KiB
HTML
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<title>curl_version_info man page</title>
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<p class="level0"><a name="NAME"></a><h2 class="nroffsh">NAME</h2>
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<p class="level0">curl_version_info - returns run-time libcurl version info <a name="SYNOPSIS"></a><h2 class="nroffsh">SYNOPSIS</h2>
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<p class="level0"><span Class="bold">#include <curl/curl.h></span>
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<p class="level0"><span Class="bold">curl_version_info_data *curl_version_info( CURLversion type );</span>
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<p class="level0"><a name="DESCRIPTION"></a><h2 class="nroffsh">DESCRIPTION</h2>
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<p class="level0">Returns a pointer to a filled in struct with information about various run-time features in libcurl. <span Class="emphasis">type</span> should be set to the version of this functionality by the time you write your program. This way, libcurl will always return a proper struct that your program understands, while programs in the future might get an different struct. CURLVERSION_NOW will be the most recent one for the library you have installed:
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<p class="level0"> data = curl_version_info(CURLVERSION_NOW);
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<p class="level0">Applications should use this information to judge if things are possible to do or not, instead of using compile-time checks, as dynamic/DLL libraries can be changed independent of applications.
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<p class="level0">The curl_version_info_data struct looks like this
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<p class="level0"><pre>
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<p class="level0">typedef struct {
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CURLversion age; /* 0 - this kind of struct */
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const char *version; /* human readable string */
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unsigned int version_num; /* numeric representation */
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const char *host; /* human readable string */
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int features; /* bitmask, see below */
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char *ssl_version; /* human readable string */
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long ssl_version_num; /* number */
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char *libz_version; /* human readable string */
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const char *protocols[]; /* list of protocols */
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} curl_version_info_data;
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<p class="level0"><span Class="emphasis">age</span> describes what kind of struct this is. It is always 0 now. In a
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future libcurl, if this struct changes, this age counter may be increased, and
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then the struct for number 1 will look different (except for this first struct
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field).
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<p class="level0"><span Class="emphasis">version</span> is just an ascii string for the libcurl version.
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<p class="level0"><span Class="emphasis">version_num</span> is a 24 bit number created like this: <8 bits major number>
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| <8 bits minor number> | <8 bits patch number>. Version 7.9.8 is therefore
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returned as 0x070908.
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<p class="level0"><span Class="emphasis">host</span> is an ascii string showing what host information that this libcurl
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was built for. As discovered by a configure script or set by the build
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environment.
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<p class="level0"><span Class="emphasis">features</span> can have none, one or more bits set, and the currently defined
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bits are:
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<p class="level0"><span Class="bold">CURL_VERSION_IPV6</span>
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supports IPv6
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<p class="level0"><span Class="bold">CURL_VERSION_KERBEROS4</span>
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supports kerberos4 (when using FTP)
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<p class="level0"><span Class="bold">CURL_VERSION_SSL</span>
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supports SSL (HTTPS/FTPS)
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<p class="level0"><span Class="bold">CURL_VERSION_LIBZ</span>
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supports HTTP deflate using libz
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<p class="level0"><span Class="bold">CURL_VERSION_NTLM</span>
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supports HTTP NTLM (added in 7.10.6)
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<p class="level0"><span Class="bold">CURL_VERSION_GSSNEGOTIATE</span>
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supports HTTP GSS-Negotiate (added in 7.10.6)
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<p class="level0"><span Class="bold">CURL_VERSION_DEBUG</span>
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libcurl was built with extra debug capabilities built-in. This is mainly of
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interest for libcurl hackers. (added in 7.10.6)
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<p class="level0"><span Class="bold">CURL_VERSION_ASYNCHDNS</span>
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libcurl was built with support for asynchronous name lookups, which allows
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more exact timeouts (even on Windows) and less blocking when using the multi
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interface. (added in 7.10.7)
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<p class="level0"><span Class="bold">CURL_VERSION_SPNEGO</span>
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libcurl was built with support for SPNEGO authentication (Simple and Protected
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GSS-API Negotiation Mechanism, defined in RFC 2478.) (added in 7.10.8)
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<span Class="emphasis">ssl_version</span> is an ascii string for the OpenSSL version used. If libcurl
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has no SSL support, this is NULL.
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<p class="level0"><span Class="emphasis">ssl_version_num</span> is the numerical OpenSSL version value as defined by the
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OpenSSL project. If libcurl has no SSL support, this is 0.
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<p class="level0"><span Class="emphasis">libz_version</span> is an ascii string (there is no numerical version). If
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libcurl has no libz support, this is NULL.
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<p class="level0"><span Class="emphasis">protocols</span> is a pointer to an array of char * pointers, containing the
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names protocols that libcurl supports (using lowercase letters). The protocol
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names are the same as would be used in URLs. The array is terminated by a NULL
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entry.
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</pre>
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<a name="RETURN"></a><h2 class="nroffsh">RETURN VALUE</h2>
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<p class="level0">A pointer to a curl_version_info_data struct. <a name="SEE"></a><h2 class="nroffsh">SEE ALSO</h2>
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<p class="level0"><a class="emphasis" href="./curl_version.html">curl_version(3)</a>
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<p class="level0"><p class="roffit">
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