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60 строки
2.2 KiB
Groff
60 строки
2.2 KiB
Groff
.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" **************************************************************************
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.TH curl_getenv 3 "November 26, 2021" "libcurl 7.83.1" "libcurl Manual"
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.SH NAME
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curl_getenv - return value for environment name
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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char *curl_getenv(const char *name);
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.fi
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.SH 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 \fIcurl_free(3)\fP the returned string when you are done with it.
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.SH EXAMPLE
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.nf
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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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.fi
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.SH AVAILABILITY
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This function will be removed from the public libcurl API in a near future. It
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will instead be made "available" by source code access only, and then as
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curlx_getenv().
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.SH 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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.SH 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 will not work properly if this is not done. The
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unix implementation thus has to suffer slightly from the drawbacks of other
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systems.
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.SH "SEE ALSO"
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.BR getenv "(3C), "
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