curl_version_info(3)                      libcurl Manual                     curl_version_info(3)



NAME
       curl_version_info - returns run-time libcurl version info

SYNOPSIS
       #include 

       curl_version_info_data *curl_version_info( CURLversion type);

DESCRIPTION
       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 an 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 compile-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;     /* number */
         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 */

       } curl_version_info_data;

       age  describes  what  age  of  this  struct this is. The number depends on how new libcurl
       you're using. 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 configure script or set by the build environment.

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

              CURL_VERSION_IPV6
                     supports IPv6

              CURL_VERSION_KERBEROS4
                     supports kerberos4 (when using FTP)

              CURL_VERSION_SSL
                     supports SSL (HTTPS/FTPS)

              CURL_VERSION_LIBZ
                     supports HTTP deflate using libz

              CURL_VERSION_NTLM
                     supports HTTP NTLM (added in 7.10.6)

              CURL_VERSION_GSSNEGOTIATE
                     supports HTTP GSS-Negotiate (added in 7.10.6)

              CURL_VERSION_DEBUG
                     libcurl  was built with extra debug capabilities built-in. This is mainly of
                     interest for libcurl hackers. (added in 7.10.6)

              CURL_VERSION_ASYNCHDNS
                     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)

              CURL_VERSION_SPNEGO
                     libcurl was built with support for SPNEGO authentication  (Simple  and  Pro-
                     tected  GSS-API  Negotiation  Mechanism,  defined  in  RFC  2478.) (added in
                     7.10.8)

              CURL_VERSION_LARGEFILE
                     libcurl was built with support for large files.

              CURL_VERSION_IDN
                     libcurl was built with support for IDNA,  domain  names  with  international
                     letters.
       ssl_version  is  an  ascii string for the OpenSSL version used. If libcurl has no SSL sup-
       port, 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.

RETURN VALUE
       A pointer to a curl_version_info_data struct.

SEE ALSO
       curl_version(3)




libcurl 7.12                               11 May 2004                       curl_version_info(3)