curl_free - Man Page

#include <curl/curl.h>

void curl_free(void *ptr);

curl_free reclaims memory that has been obtained through a libcurl call. Use curl_free(3) instead of free() to avoid anomalies that can result from differences in memory management between your application and libcurl.

Passing in a NULL pointer in ptr makes this function return immediately with no action.

This functionality affects all supported protocols

int main(void)
{
  char *width = curl_getenv("COLUMNS");
  if(width) {
    /* it was set */
    curl_free(width);
  }
}

Added in curl 7.1

None

curl_easy_escape(3), curl_easy_unescape(3)

curl_easy_escape(3), curl_easy_unescape(3), curl_escape(3), curl_getenv(3), curl_mime_free(3), curl_mprintf(3), curl_multi_get_handles(3), curl_unescape(3), curl_url_get(3), libcurl-url(3).