curl/src/tool_setup.h
Jay Satiro 2f17a9b654 tool: improve --stderr handling
- freopen stderr with the user-specified file (--stderr file) instead of
  using a separate 'errors' stream.

- In tool_setup.h override stdio.h's stderr macro as global variable
  tool_stderr.

Both freopen and overriding the stderr macro are necessary because if
the user-specified filename is "-" then stdout is assigned to
tool_stderr and no freopen takes place. See the PR for more information.

Ref: https://github.com/curl/curl/issues/10491

Closes https://github.com/curl/curl/pull/10673
2023-03-12 00:58:40 -05:00

77 lines
2.2 KiB
C

#ifndef HEADER_CURL_TOOL_SETUP_H
#define HEADER_CURL_TOOL_SETUP_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#define CURL_NO_OLDIES
/*
* curl_setup.h may define preprocessor macros such as _FILE_OFFSET_BITS and
* _LARGE_FILES in order to support files larger than 2 GB. On platforms
* where this happens it is mandatory that these macros are defined before
* any system header file is included, otherwise file handling function
* prototypes will be misdeclared and curl tool may not build properly;
* therefore we must include curl_setup.h before curl.h when building curl.
*/
#include "curl_setup.h" /* from the lib directory */
extern FILE *tool_stderr;
#if !defined(CURL_DO_NOT_OVERRIDE_STDERR) && !defined(UNITTESTS)
#ifdef stderr
#undef stderr
#endif
#define stderr tool_stderr
#endif
/*
* curl tool certainly uses libcurl's external interface.
*/
#include <curl/curl.h> /* external interface */
/*
* Platform specific stuff.
*/
#ifdef macintosh
# define main(x,y) curl_main(x,y)
#endif
#ifndef OS
# define OS "unknown"
#endif
#ifndef UNPRINTABLE_CHAR
/* define what to use for unprintable characters */
# define UNPRINTABLE_CHAR '.'
#endif
#ifndef HAVE_STRDUP
# include "tool_strdup.h"
#endif
#endif /* HEADER_CURL_TOOL_SETUP_H */