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curl_version_info(3)            libcurl Manual            curl_version_info(3)

       curl_version_info - returns run-time libcurl version info

       #include <curl/curl.h>

       curl_version_info_data *curl_version_info( CURLversion type);

       Returns  a  pointer  to  a  filled  in struct with information about various run-time features in libcurl. type
       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 a different
       struct. CURLVERSION_NOW will be the most recent one for the library you have installed:

               data = curl_version_info(CURLVERSION_NOW);

       Applications should use this information to judge if things are possible to do or not, instead  of  using  com-
       pile-time checks, as dynamic/DLL libraries can be changed independent of applications.

       The curl_version_info_data struct looks like this

       typedef struct {
         CURLversion age;          /* see description below */

         /* when 'age' is 0 or higher, the members below also exist: */
         const char *version;      /* human readable string */
         unsigned int version_num; /* numeric representation */
         const char *host;         /* human readable string */
         int features;             /* bitmask, see below */
         char *ssl_version;        /* human readable string */
         long ssl_version_num;     /* not used, always zero */
         const char *libz_version; /* human readable string */
         const char **protocols;   /* list of protocols */

         /* when 'age' is 1 or higher, the members below also exist: */
         const char *ares;         /* human readable string */
         int ares_num;             /* number */

         /* when 'age' is 2 or higher, the member below also exists: */
         const char *libidn;       /* human readable string */

         /* when 'age' is 3 or higher, the members below also exist: */
         int iconv_ver_num;       /* '_libiconv_version' if iconv support enabled */

         const char *libssh_version; /* human readable string */

       } curl_version_info_data;

       age  describes  what  the age of this struct is. The number depends on how new the libcurl you're using is. You
       are however guaranteed to get a struct that you have a matching struct for in the header, as you  tell  libcurl
       your "age" with the input argument.

       version is just an ascii string for the libcurl version.

       version_num is a 24 bit number created like this: <8 bits major number> | <8 bits minor number> | <8 bits patch
       number>. Version 7.9.8 is therefore returned as 0x070908.

       host is an ascii string showing what host information that this libcurl was built for. As discovered by a  con-
       figure script or set by the build environment.

       features can have none, one or more bits set, and the currently defined bits are:

                     supports IPv6

                     supports kerberos4 (when using FTP)

                     supports SSL (HTTPS/FTPS) (Added in 7.10)

                     supports HTTP deflate using libz (Added in 7.10)

                     supports HTTP NTLM (added in 7.10.6)

                     supports HTTP GSS-Negotiate (added in 7.10.6)

                     libcurl was built with debug capabilities (added in 7.10.6)

                     libcurl was built with memory tracking debug capabilities. This is mainly of interest for libcurl
                     hackers. (added in 7.19.6)

                     libcurl was built with support for asynchronous name lookups, which allows  more  exact  timeouts
                     (even on Windows) and less blocking when using the multi interface. (added in 7.10.7)

                     libcurl  was  built with support for SPNEGO authentication (Simple and Protected GSS-API Negotia-
                     tion Mechanism, defined in RFC 2478.) (added in 7.10.8)

                     libcurl was built with support for large files. (Added in 7.11.1)

                     libcurl was built with support for IDNA, domain  names  with  international  letters.  (Added  in

                     libcurl  was built with support for SSPI. This is only available on Windows and makes libcurl use
                     Windows-provided functions for NTLM authentication. It also allows libcurl  to  use  the  current
                     user and the current user's password without the app having to pass them on. (Added in 7.13.2)

                     libcurl was built with support for character conversions, as provided by the CURLOPT_CONV_* call-
                     backs. (Added in 7.15.4)

                     libcurl was built with support for TLS-SRP. (Added in 7.21.4)

                     libcurl was built with support for NTLM delegation to a winbind helper.  (Added in 7.22.0)
       ssl_version is an ASCII string for the OpenSSL version used. If libcurl has no SSL support, this is NULL.

       ssl_version_num is the numerical OpenSSL version value as defined by the OpenSSL project. If libcurl has no SSL
       support, this is 0.

       libz_version  is an ASCII string (there is no numerical version). If libcurl has no libz support, this is NULL.

       protocols is a pointer to an array of char * pointers, containing the names  protocols  that  libcurl  supports
       (using lowercase letters). The protocol names are the same as would be used in URLs. The array is terminated by
       a NULL entry.

       A pointer to a curl_version_info_data struct.


libcurl 7.19.6                   10 June 2009             curl_version_info(3)