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.\" generated by cd2nroff 0.1 from curl_getenv.md
.TH curl_getenv 3 "2025-06-27" libcurl
.SH NAME
curl_getenv \- return value for environment name
.SH SYNOPSIS
.nf
#include <curl/curl.h>
char *curl_getenv(const char *name);
.fi
.SH DESCRIPTION
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 Windows).
You must \fIcurl_free(3)\fP the returned string when you are done with it.
.SH PROTOCOLS
This functionality affects all supported protocols
.SH EXAMPLE
.nf
int main(void)
{
char *width = curl_getenv("COLUMNS");
if(width) {
/* it was set */
curl_free(width);
}
}
.fi
.SH AVAILABILITY
Added in curl 7.1
.SH RETURN VALUE
A pointer to a null\-terminated string or NULL if it failed to find the
specified name.
.SH NOTE
Under Unix operating systems, there is no point in returning an allocated
memory, although other systems does not work properly if this is not done. The
Unix implementation thus suffers slightly from the drawbacks of other systems.
.SH SEE ALSO
.BR getenv (3C)