summaryrefslogtreecommitdiffstats
path: root/gl/lib/xstdopen.h
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--gl/lib/xstdopen.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/gl/lib/xstdopen.h b/gl/lib/xstdopen.h
new file mode 100644
index 0000000..0c18209
--- /dev/null
+++ b/gl/lib/xstdopen.h
@@ -0,0 +1,28 @@
+/* Ensure that stdin, stdout, stderr are open.
+ Copyright (C) 2019-2022 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Ensures that the file descriptors of stdin, stdout, stderr (0, 1, 2) are
+ open. Exits the program with an error message upon failure; the error
+ message may not appear if stderr is closed. */
+extern void xstdopen (void);
+
+#ifdef __cplusplus
+}
+#endif