1--- 2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3SPDX-License-Identifier: curl 4Title: curl_getenv 5Section: 3 6Source: libcurl 7See-also: 8 - getenv (3C) 9Protocol: 10 - All 11--- 12 13# NAME 14 15curl_getenv - return value for environment name 16 17# SYNOPSIS 18 19~~~c 20#include <curl/curl.h> 21 22char *curl_getenv(const char *name); 23~~~ 24 25# DESCRIPTION 26 27curl_getenv() is a portable wrapper for the getenv() function, meant to 28emulate its behavior and provide an identical interface for all operating 29systems libcurl builds on (including win32). 30 31You must curl_free(3) the returned string when you are done with it. 32 33# EXAMPLE 34 35~~~c 36int main(void) 37{ 38 char *width = curl_getenv("COLUMNS"); 39 if(width) { 40 /* it was set! */ 41 curl_free(width); 42 } 43} 44~~~ 45 46# AVAILABILITY 47 48Always 49 50# RETURN VALUE 51 52A pointer to a null-terminated string or NULL if it failed to find the 53specified name. 54 55# NOTE 56 57Under unix operating systems, there is no point in returning an allocated 58memory, although other systems does not work properly if this is not done. The 59unix implementation thus suffers slightly from the drawbacks of other systems. 60
