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 informationabout 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 programsin 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 thingsare 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 */ /* 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 */
libcurl 7.19.6 Last change: 10 June 2009 1libcurl Manual curl_version_info(3)
} curl_version_info_data;
age describes what the age of this struct is. The numberdepends on how new the libcurl you're using is. You are how-
ever 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 IPv6CURL_VERSION_KERBEROS4
supports kerberos4 (when using FTP)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 capa-
bilities. 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 Windows) and less blocking when using the libcurl 7.19.6 Last change: 10 June 2009 2libcurl Manual curl_version_info(3)
multi interface. (added in 7.10.7)CURL_VERSION_SPNEGO
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)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 useWindows-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)CURL_VERSION_CONV
libcurl was built with support for characterconversions, as provided by the CURLOPT_CONV_*
callbacks. (Added in 7.15.4)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. RETURN VALUEA pointer to a curl_version_info_data struct.
SEE ALSO
curl_version(3)
ATTRIBUTES
See attributes(5) for descriptions of the following libcurl 7.19.6 Last change: 10 June 2009 3libcurl Manual curl_version_info(3)
attributes:_______________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE|
|____________________|__________________|_
| Availability | web/curl ||____________________|__________________|_
| Interface Stability| Uncommitted ||____________________|_________________|
NOTESSource for C-URL is available on http://opensolaris.org.
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