manpagez: man pages & more
man curl_version_info(3)
Home | html | info | man
curl_version_info(3)            libcurl Manual            curl_version_info(3)




NAME

       curl_version_info - returns run-time libcurl version info


SYNOPSIS

       #include <curl/curl.h>

       curl_version_info(3) CURLversion type);


DESCRIPTION

       Returns  a  pointer to a filled in static struct with information about
       various features in the running version of libcurl. type should be  set
       to  the  version  of this functionality by the time you write your pro-
       gram. 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 possi-
       ble 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 * const *protocols; /* 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 (7.16.1 or later), the members below also
            exist  */
         int iconv_ver_num;       /* '_libiconv_version' if iconv support enabled */

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

         /* when 'age' is 4 or higher (7.57.0 or later), the members below also
            exist  */
         unsigned int brotli_ver_num; /* Numeric Brotli version
                                         (MAJOR << 24) | (MINOR << 12) | PATCH */
         const char *brotli_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 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 Kerberos V4 (when using FTP)

              CURL_VERSION_KERBEROS5
                     supports  Kerberos V5 authentication for FTP, IMAP, POP3,
                     SMTP and SOCKSv5 proxy (Added in 7.40.0)

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

              CURL_VERSION_LIBZ
                     supports HTTP deflate using libz (Added in 7.10)

              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  debug  capabilities  (added  in
                     7.10.6)

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

              CURL_VERSION_ASYNCHDNS
                     libcurl  was  built  with  support  for asynchronous name
                     lookups, which allows more exact timeouts (even  on  Win-
                     dows)  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  Protected  GSS-API  Negotiation  Mechanism,
                     defined in RFC 2478.) (added in 7.10.8)

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

              CURL_VERSION_IDN
                     libcurl  was  built  with  support for IDNA, domain names
                     with international letters. (Added in 7.12.0)

              CURL_VERSION_SSPI
                     libcurl was built with support for  SSPI.  This  is  only
                     available  on  Windows and makes libcurl use Windows-pro-
                     vided functions for Kerberos,  NTLM,  SPNEGO  and  Digest
                     authentication. It also allows libcurl to use the current
                     user credentials without the app having to pass them  on.
                     (Added in 7.13.2)

              CURL_VERSION_GSSAPI
                     libcurl  was  built  with support for GSS-API. This makes
                     libcurl use provided functions for  Kerberos  and  SPNEGO
                     authentication. It also allows libcurl to use the current
                     user credentials without the app having to pass them  on.
                     (Added in 7.38.0)

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

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

              CURL_VERSION_NTLM_WB
                     libcurl was built with support for NTLM delegation  to  a
                     winbind helper.  (Added in 7.22.0)

              CURL_VERSION_HTTP2
                     libcurl  was  built  with  support  for HTTP2.  (Added in
                     7.33.0)

              CURL_VERSION_UNIX_SOCKETS
                     libcurl was built with support for Unix  domain  sockets.
                     (Added in 7.40.0)

              CURL_VERSION_PSL
                     libcurl  was built with support for Mozilla's Public Suf-
                     fix List. This makes libcurl ignore cookies with a domain
                     that's on the list.  (Added in 7.47.0)

              CURL_VERSION_HTTPS_PROXY
                     libcurl  was  built with support for HTTPS-proxy.  (Added
                     in 7.52.0)

              CURL_VERSION_MULTI_SSL
                     libcurl  was  built  with  multiple  SSL  backends.   For
                     details, see curl_global_sslset(3).  (Added in 7.56.0)

              CURL_VERSION_BROTLI
                     supports  HTTP Brotli content encoding using libbrotlidec
                     (Added in 7.57.0)
       ssl_version is an ASCII string for the OpenSSL version used. If libcurl
       has no SSL support, this is NULL.

       ssl_version_num is always 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 ter-
       minated by a NULL entry.


RETURN VALUE

       A pointer to a curl_version_info_data struct.


SEE ALSO

       curl_version(3)




libcurl 7.57.0                 November 05, 2017          curl_version_info(3)

curl 7.57.0 - Generated Wed Nov 29 15:52:31 CST 2017
© manpagez.com 2000-2018
Individual documents may contain additional copyright information.