errno-h: document Haiku errors can’t be -1
[gnulib.git] / lib / xstdopen.c
blobb6dca48252a716f5ae65f8ecb222a93ffe56c9b2
1 /* Ensure that stdin, stdout, stderr are open.
2 Copyright (C) 2019-2025 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17 #include <config.h>
19 /* Specification. */
20 #include "xstdopen.h"
22 #include "stdopen.h"
23 #include <error.h>
24 #include "exitfail.h"
26 #include "gettext.h"
27 #define _(msgid) dgettext ("gnulib", msgid)
29 void
30 xstdopen (void)
32 int stdopen_errno = stdopen ();
33 if (stdopen_errno != 0)
34 /* Ignore stdopen_errno in the error message, since it may be misleading
35 (see stdopen.c). */
36 error (exit_failure, 0,
37 _("failed to open all three standard file descriptors; maybe %s or %s are not working right?"),
38 "/dev/null", "/dev/full");