CURLOPT_NOPROGRESS - Man Page

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOPROGRESS, long onoff);

If onoff is to 1, it tells the library to shut off the progress meter completely for requests done with this handle. It also prevents the CURLOPT_XFERINFOFUNCTION(3) or CURLOPT_PROGRESSFUNCTION(3) from getting called.

1, meaning it normally runs without a progress meter.

This functionality affects all supported protocols

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

    /* enable progress meter */
    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);

    /* Perform the request */
    curl_easy_perform(curl);
  }
}

Added in curl 7.1

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

CURLOPT_DEBUGFUNCTION(3), CURLOPT_PROGRESSFUNCTION(3), CURLOPT_VERBOSE(3), CURLOPT_XFERINFOFUNCTION(3)

curl_easy_setopt(3), CURLOPT_PROGRESSFUNCTION(3), CURLOPT_STDERR(3), CURLOPT_XFERINFODATA(3), CURLOPT_XFERINFOFUNCTION(3), libcurl-symbols(3), libcurl-tutorial(3).