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160 lines
6.5 KiB
Groff
160 lines
6.5 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at http://curl.haxx.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.\"
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.TH curl_version_info 3 "18 Feb 2014" "libcurl 7.33.0" "libcurl Manual"
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.SH NAME
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curl_version_info - returns run-time libcurl version info
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.SH SYNOPSIS
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.B #include <curl/curl.h>
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.sp
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.BI "curl_version_info_data *curl_version_info( CURLversion "type ");"
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.ad
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.SH DESCRIPTION
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Returns a pointer to a filled in static struct with information about various
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features in the running version of libcurl. \fItype\fP should be set to the
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version of this functionality by the time you write your program. This way,
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libcurl will always return a proper struct that your program understands,
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while programs in the future might get a different
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struct. \fBCURLVERSION_NOW\fP will be the most recent one for the library you
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have installed:
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data = curl_version_info(CURLVERSION_NOW);
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Applications should use this information to judge if things are possible to do
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or not, instead of using compile-time checks, as dynamic/DLL libraries can be
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changed independent of applications.
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The curl_version_info_data struct looks like this
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.nf
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typedef struct {
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CURLversion age; /* see description below */
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/* when 'age' is 0 or higher, the members below also exist: */
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const char *version; /* human readable string */
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unsigned int version_num; /* numeric representation */
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const char *host; /* human readable string */
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int features; /* bitmask, see below */
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char *ssl_version; /* human readable string */
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long ssl_version_num; /* not used, always zero */
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const char *libz_version; /* human readable string */
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const char **protocols; /* list of protocols */
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/* when 'age' is 1 or higher, the members below also exist: */
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const char *ares; /* human readable string */
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int ares_num; /* number */
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/* when 'age' is 2 or higher, the member below also exists: */
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const char *libidn; /* human readable string */
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/* when 'age' is 3 or higher (7.16.1 or later), the members below also
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exist */
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int iconv_ver_num; /* '_libiconv_version' if iconv support enabled */
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const char *libssh_version; /* human readable string */
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} curl_version_info_data;
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.fi
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\fIage\fP describes what the age of this struct is. The number depends on how
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new the libcurl you're using is. You are however guaranteed to get a struct that you
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have a matching struct for in the header, as you tell libcurl your "age" with
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the input argument.
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\fIversion\fP is just an ascii string for the libcurl version.
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\fIversion_num\fP is a 24 bit number created like this: <8 bits major number>
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| <8 bits minor number> | <8 bits patch number>. Version 7.9.8 is therefore
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returned as 0x070908.
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\fIhost\fP is an ascii string showing what host information that this libcurl
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was built for. As discovered by a configure script or set by the build
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environment.
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\fIfeatures\fP can have none, one or more bits set, and the currently defined
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bits are:
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.RS
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.IP CURL_VERSION_IPV6
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supports IPv6
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.IP CURL_VERSION_KERBEROS4
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supports kerberos4 (when using FTP)
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.IP CURL_VERSION_SSL
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supports SSL (HTTPS/FTPS) (Added in 7.10)
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.IP CURL_VERSION_LIBZ
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supports HTTP deflate using libz (Added in 7.10)
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.IP CURL_VERSION_NTLM
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supports HTTP NTLM (added in 7.10.6)
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.IP CURL_VERSION_GSSNEGOTIATE
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supports HTTP GSS-Negotiate (added in 7.10.6)
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.IP CURL_VERSION_DEBUG
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libcurl was built with debug capabilities (added in 7.10.6)
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.IP CURL_VERSION_CURLDEBUG
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libcurl was built with memory tracking debug capabilities. This is mainly of
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interest for libcurl hackers. (added in 7.19.6)
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.IP CURL_VERSION_ASYNCHDNS
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libcurl was built with support for asynchronous name lookups, which allows
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more exact timeouts (even on Windows) and less blocking when using the multi
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interface. (added in 7.10.7)
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.IP CURL_VERSION_SPNEGO
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libcurl was built with support for SPNEGO authentication (Simple and Protected
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GSS-API Negotiation Mechanism, defined in RFC 2478.) (added in 7.10.8)
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.IP CURL_VERSION_LARGEFILE
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libcurl was built with support for large files. (Added in 7.11.1)
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.IP CURL_VERSION_IDN
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libcurl was built with support for IDNA, domain names with international
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letters. (Added in 7.12.0)
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.IP CURL_VERSION_SSPI
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libcurl was built with support for SSPI. This is only available on Windows and
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makes libcurl use Windows-provided functions for NTLM authentication. It also
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allows libcurl to use the current user and the current user's password without
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the app having to pass them on. (Added in 7.13.2)
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.IP CURL_VERSION_CONV
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libcurl was built with support for character conversions, as provided by the
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CURLOPT_CONV_* callbacks. (Added in 7.15.4)
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.IP CURL_VERSION_TLSAUTH_SRP
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libcurl was built with support for TLS-SRP. (Added in 7.21.4)
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.IP CURL_VERSION_NTLM_WB
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libcurl was built with support for NTLM delegation to a winbind helper.
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(Added in 7.22.0)
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.IP CURL_VERSION_HTTP2
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libcurl was built with support for HTTP2.
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(Added in 7.33.0)
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.RE
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\fIssl_version\fP is an ASCII string for the OpenSSL version used. If libcurl
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has no SSL support, this is NULL.
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\fIssl_version_num\fP is the numerical OpenSSL version value as defined by the
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OpenSSL project. If libcurl has no SSL support, this is 0.
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\fIlibz_version\fP is an ASCII string (there is no numerical version). If
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libcurl has no libz support, this is NULL.
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\fIprotocols\fP is a pointer to an array of char * pointers, containing the
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names protocols that libcurl supports (using lowercase letters). The protocol
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names are the same as would be used in URLs. The array is terminated by a NULL
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entry.
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.SH RETURN VALUE
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A pointer to a curl_version_info_data struct.
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.SH "SEE ALSO"
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\fIcurl_version(3)\fP
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