curl_free - reclaim memory that has been obtained through a libcurl call

Added in curl 7.1

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.

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

curl_free - reclaim memory that has been obtained through a libcurl call

This functionality affects all supported protocols

None

curl_easy_escape(3), curl_easy_unescape(3) libcurl 2025-06-16 curl_free(3)

#include <curl/curl.h> void curl_free(void *ptr);