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e3fe020089
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
60 lines
1.1 KiB
Markdown
60 lines
1.1 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: curl_getenv
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Section: 3
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Source: libcurl
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See-also:
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- getenv (3C)
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Protocol:
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- All
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---
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# NAME
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curl_getenv - return value for environment name
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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char *curl_getenv(const char *name);
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~~~
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# DESCRIPTION
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curl_getenv() is a portable wrapper for the getenv() function, meant to
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emulate its behavior and provide an identical interface for all operating
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systems libcurl builds on (including win32).
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You must curl_free(3) the returned string when you are done with it.
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# EXAMPLE
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~~~c
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int main(void)
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{
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char *width = curl_getenv("COLUMNS");
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if(width) {
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/* it was set! */
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curl_free(width);
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}
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}
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~~~
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# AVAILABILITY
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Always
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# RETURN VALUE
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A pointer to a null-terminated string or NULL if it failed to find the
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specified name.
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# NOTE
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Under unix operating systems, there is no point in returning an allocated
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memory, although other systems does not work properly if this is not done. The
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unix implementation thus suffers slightly from the drawbacks of other systems.
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