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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

     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

	     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;	 /* 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 */

     } 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

libcurl 7.13.2	    Last change: 11 Mar 2005			1

curl_version_info(3)	 libcurl Manual	     curl_version_info(3)

     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:

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

	       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  authen-
	       tication (Simple and Protected GSS-API Negotiation
	       Mechanism, defined in RFC 2478.) (added in 7.10.8)


libcurl 7.13.2	    Last change: 11 Mar 2005			2

curl_version_info(3)	 libcurl Manual	     curl_version_info(3)

	       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  authentica-
	       tion.  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)
     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 sup-
     port, this is 0.

     libz_version is an ascii string (there is no numerical  ver-
     sion). If libcurl has no libz support, this is NULL.

     protocols is a pointer to an array of char * pointers,  con-
     taining  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 7.13.2	    Last change: 11 Mar 2005			3

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