curl_version_info.3
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- ."
- .TH curl_version_info 3 "2 Nov 2006" "libcurl 7.16.1" "libcurl Manual"
- .SH NAME
- curl_version_info - returns run-time libcurl version info
- .SH SYNOPSIS
- .B #include <curl/curl.h>
- .sp
- .BI "curl_version_info_data *curl_version_info( CURLversion "type ");"
- .ad
- .SH DESCRIPTION
- Returns a pointer to a filled in struct with information about various
- run-time features in libcurl. fItypefP 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 compile-time checks, as dynamic/DLL libraries can be
- changed independent of applications.
- The curl_version_info_data struct looks like this
- .nf
- 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;
- .fi
- fIagefP 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.
- fIversionfP is just an ascii string for the libcurl version.
- fIversion_numfP 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.
- fIhostfP 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.
- fIfeaturesfP can have none, one or more bits set, and the currently defined
- bits are:
- .RS
- .IP CURL_VERSION_IPV6
- supports IPv6
- .IP CURL_VERSION_KERBEROS4
- supports kerberos4 (when using FTP)
- .IP CURL_VERSION_SSL
- supports SSL (HTTPS/FTPS) (Added in 7.10)
- .IP CURL_VERSION_LIBZ
- supports HTTP deflate using libz (Added in 7.10)
- .IP CURL_VERSION_NTLM
- supports HTTP NTLM (added in 7.10.6)
- .IP CURL_VERSION_GSSNEGOTIATE
- supports HTTP GSS-Negotiate (added in 7.10.6)
- .IP 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)
- .IP 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)
- .IP 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)
- .IP CURL_VERSION_LARGEFILE
- libcurl was built with support for large files. (Added in 7.11.1)
- .IP CURL_VERSION_IDN
- libcurl was built with support for IDNA, domain names with international
- letters. (Added in 7.12.0)
- .IP CURL_VERSION_SSPI
- 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)
- .IP CURL_VERSION_CONV
- libcurl was built with support for character conversions, as provided by the
- CURLOPT_CONV_* callbacks. (Added in 7.15.4)
- .RE
- fIssl_versionfP is an ASCII string for the OpenSSL version used. If libcurl
- has no SSL support, this is NULL.
- fIssl_version_numfP is the numerical OpenSSL version value as defined by the
- OpenSSL project. If libcurl has no SSL support, this is 0.
- fIlibz_versionfP is an ASCII string (there is no numerical version). If
- libcurl has no libz support, this is NULL.
- fIprotocolsfP 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.
- .SH RETURN VALUE
- A pointer to a curl_version_info_data struct.
- .SH "SEE ALSO"
- fIcurl_version(3)fP