NAME
curl_version_info - returns run-time libcurl version info
SYNOPSIS
#include <curl/curl.h>
curl_version_info_data *curl_version_info( CURLversion
type);
DESCRIPTION
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
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
typedef struct {
CURLversion age; /* 0 - this kind of struct */
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; /* number */
char *libz_version; /* human readable string */
const char *protocols[]; /* list of protocols */
} curl_version_info_data;
age describes what kind of struct this is. It is always 0
now. In a future libcurl, if this struct changes, this age
counter may be increased, and then the struct for number 1
will look different (except for this first struct field).
version is just an ascii string for the libcurl version.
version_num is a 6 digit hexadecimal number created like
this: <2 digits major number> | <2 digits minor number> | <2
digits 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 cur
rently defined bits are:
CURL_VERSION_IPV6
supports IPv6
CURL_VERSION_KERBEROS4
supports kerberos4 (when using FTP)
CURL_VERSION_SSL
supports SSL (HTTPS/FTPS)
CURL_VERSION_LIBZ
supports HTTP deflate using libz
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 VALUE
A pointer to a curl_version_info_data struct.
SEE ALSO
curl_version(3)
BUGS
No known bugs.
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