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Daniel Stenberg e3fe020089

docs/libcurl: generate PROTOCOLS from meta-data

Remove the PROTOCOLS section from the source files completely and
instead generate them based on the header data in the curldown files.

It also generates TLS backend information for options marked for TLS as
protocol.

Closes #13175

2024-03-23 18:13:03 +01:00

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SPDX-License-Identifier

Title

Section

Source

See-also

Protocol

curl

curl_getenv

libcurl

getenv (3C)

All

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 operating systems libcurl builds on (including win32).

You must curl_free(3) the returned string when you are done with it.

EXAMPLE

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

AVAILABILITY

Always

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 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.

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