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CURLSHOPT_USERDATA(3) Library Functions Manual CURLSHOPT_USERDATA(3) NAME CURLSHOPT_USERDATA - pointer passed to the lock and unlock mutex callbacks SYNOPSIS #include <curl/curl.h> CURLSHcode curl_share_setopt(CURLSH *share, CURLSHOPT_USERDATA, void *clientp); DESCRIPTION The clientp parameter is held verbatim by libcurl and is passed on as the clientp argument to the callbacks set with CURLSHOPT_LOCKFUNC(3) and CURL- SHOPT_UNLOCKFUNC(3). PROTOCOLS This functionality affects all supported protocols EXAMPLE struct secrets { void *custom; }; int main(void) { CURLSHcode sh; struct secrets private_stuff; CURLSH *share = curl_share_init(); sh = curl_share_setopt(share, CURLSHOPT_USERDATA, &private_stuff); if(sh) printf("Error: %s\n", curl_share_strerror(sh)); } AVAILABILITY Added in curl 7.10.3 RETURN VALUE CURLSHE_OK (zero) means that the option was set properly, non-zero means an error occurred. See libcurl-errors(3) for the full list with descriptions. SEE ALSO CURLSHOPT_LOCKFUNC(3), curl_share_cleanup(3), curl_share_init(3), curl_share_setopt(3) libcurl 2026-06-11 CURLSHOPT_USERDATA(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO
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