1CURLOPT_READDATA(3) curl_easy_setopt options CURLOPT_READDATA(3)
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6 CURLOPT_READDATA - custom pointer passed to the read callback
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9 #include <curl/curl.h>
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11 CURLcode curl_easy_setopt(CURL *handle, CURLOPT_READDATA, void
12 *pointer);
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15 Data pointer to pass to the file read function. If you use the CUR‐
16 LOPT_READFUNCTION(3) option, this is the pointer you'll get as input in
17 the 4th argument to the callback.
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19 If you don't specify a read callback but instead rely on the default
20 internal read function, this data must be a valid readable FILE * (cast
21 to 'void *').
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23 If you're using libcurl as a win32 DLL, you MUST use a CURLOPT_READ‐
24 FUNCTION(3) if you set this option or you will experience crashes.
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27 By default, this is a FILE * to stdin.
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30 This is used for all protocols when sending data.
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33 CURL *curl = curl_easy_init();
34 struct MyData this;
35 if(curl) {
36 curl_easy_setopt(curl, CURLOPT_URL, "http://example.com");
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38 /* pass pointer that gets passed in to the
39 CURLOPT_READFUNCTION callback */
40 curl_easy_setopt(curl, CURLOPT_READDATA, &this);
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42 curl_easy_perform(curl);
43 }
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46 This option was once known by the older name CURLOPT_INFILE, the name
47 CURLOPT_READDATA(3) was introduced in 7.9.7.
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50 This will return CURLE_OK.
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53 CURLOPT_READFUNCTION(3), CURLOPT_WRITEDATA(3),
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57libcurl 7.66.0 August 11, 2018 CURLOPT_READDATA(3)