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 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

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;

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:

ssl_version_num is the numerical OpenSSL version value as defined by the OpenSSL project. If libcurl has no SSL support, this is 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 terminated by a NULL entry.

RETURN VALUE¶

A pointer to a curl_version_info_data struct.

SEE ALSO¶

curl_version(3)