1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "tool_setup.h"
26 #include "tool_stderr.h"
27 #include "tool_msgs.h"
28
29 #include "memdebug.h" /* keep this as LAST include */
30
31 FILE *tool_stderr;
32
tool_init_stderr(void)33 void tool_init_stderr(void)
34 {
35 /* !checksrc! disable STDERR 1 */
36 tool_stderr = stderr;
37 }
38
tool_set_stderr_file(struct GlobalConfig * global,char * filename)39 void tool_set_stderr_file(struct GlobalConfig *global, char *filename)
40 {
41 FILE *fp;
42
43 if(!filename)
44 return;
45
46 if(!strcmp(filename, "-")) {
47 tool_stderr = stdout;
48 return;
49 }
50
51 /* precheck that filename is accessible to lessen the chance that the
52 subsequent freopen will fail. */
53 fp = fopen(filename, FOPEN_WRITETEXT);
54 if(!fp) {
55 warnf(global, "Warning: Failed to open %s", filename);
56 return;
57 }
58 fclose(fp);
59
60 /* freopen the actual stderr (stdio.h stderr) instead of tool_stderr since
61 the latter may be set to stdout. */
62 /* !checksrc! disable STDERR 1 */
63 fp = freopen(filename, FOPEN_WRITETEXT, stderr);
64 if(!fp) {
65 /* stderr may have been closed by freopen. there is nothing to be done. */
66 DEBUGASSERT(0);
67 return;
68 }
69 /* !checksrc! disable STDERR 1 */
70 tool_stderr = stderr;
71 }
72
