Annotation of embedaddon/curl/docs/libcurl/opts/CURLOPT_RESOLVER_START_DATA.3, revision 1.1.1.1
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23: .TH CURLOPT_RESOLVER_START_DATA 3 "February 14, 2018" "libcurl 7.70.0" "curl_easy_setopt options"
24:
25: .SH NAME
26: CURLOPT_RESOLVER_START_DATA \- custom pointer passed to the resolver start callback
27: .SH SYNOPSIS
28: #include <curl/curl.h>
29:
30: CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RESOLVER_START_DATA, void *pointer);
31: .SH DESCRIPTION
32: Pass a \fIpointer\fP that will be untouched by libcurl and passed as the third
33: argument in the resolver start callback set with
34: \fICURLOPT_RESOLVER_START_FUNCTION(3)\fP.
35: .SH DEFAULT
36: NULL
37: .SH PROTOCOLS
38: All
39: .SH EXAMPLE
40: .nf
41: static int resolver_start_cb(void *resolver_state, void *reserved,
42: void *userdata)
43: {
44: (void)reserved;
45: printf("Received resolver_state=%p userdata=%p\\n",
46: resolver_state, userdata);
47: return 0;
48: }
49:
50: CURL *curl = curl_easy_init();
51: if(curl) {
52: curl_easy_setopt(curl, CURLOPT_RESOLVER_START_FUNCTION, resolver_start_cb);
53: curl_easy_setopt(curl, CURLOPT_RESOLVER_START_DATA, curl);
54: curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
55: curl_easy_perform(curl);
56: curl_easy_cleanup(curl);
57: }
58: .fi
59: .SH AVAILABILITY
60: Added in 7.59.0
61: .SH RETURN VALUE
62: Returns CURLE_OK
63: .SH "SEE ALSO"
64: .BR CURLOPT_RESOLVER_START_FUNCTION "(3) "
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