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curl_getenv(3) Library Functions Manual curl_getenv(3) NAME curl_getenv - return value for environment name SYNOPSIS #include <curl/curl.h> char *curl_getenv(const char *name); DESCRIPTION curl_getenv() is a portable wrapper for the getenv() function, meant to emulate its behavior and provide an identical interface for all operat- ing systems libcurl builds on (including Windows). You must curl_free(3) the returned string when you are done with it and, although not constrained by its type, it may not be altered. PROTOCOLS This functionality affects all supported protocols EXAMPLE int main(void) { char *width = curl_getenv("COLUMNS"); if(width) { /* it was set */ curl_free(width); } } AVAILABILITY Added in curl 7.1 RETURN VALUE A pointer to a null-terminated string or NULL if it failed to find the specified name. NOTE Under Unix operating systems, there is no point in returning an allo- cated memory, although other systems does not work properly if this is not done. The Unix implementation thus suffers slightly from the draw- backs of other systems. SEE ALSO getenv(3C) libcurl 2026-06-11 curl_getenv(3)
NAME | SYNOPSIS | DESCRIPTION | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | NOTE | SEE ALSO
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