Section: libcurl Manual (3)
Updated: December 31, 2020
curl_getenv - return value for environment name
char *curl_getenv(const char *name);
curl_getenv() is a portable wrapper for the getenv() function, meant to
emulate its behavior and provide an identical interface for all operating
systems libcurl builds on (including win32).
You must curl_free(3) the returned string when you're done with it.
This function will be removed from the public libcurl API in a near future. It
will instead be made "available" by source code access only, and then as
A pointer to a null-terminated string or NULL if it failed to find the
Under unix operating systems, there isn't any point in returning an allocated
memory, although other systems won't work properly if this isn't done. The
unix implementation thus has to suffer slightly from the drawbacks of other