xstdopen: New module.

* lib/xstdopen.h: New file.
* lib/xstdopen.c: New file.
* modules/xstdopen: New file.

ChangeLog

@@ -1,3 +1,10 @@
+2019-01-06  Bruno Haible  <bruno@clisp.org>
+
+	xstdopen: New module.
+	* lib/xstdopen.h: New file.
+	* lib/xstdopen.c: New file.
+	* modules/xstdopen: New file.
+
 2019-01-06  Bruno Haible  <bruno@clisp.org>
 
 	stdopen: Fix compilation error with IRIX cc.

lib/xstdopen.c

@@ -0,0 +1,35 @@
+/* Ensure that stdin, stdout, stderr are open.
+   Copyright (C) 2019 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/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include "xstdopen.h"
+
+#include "stdopen.h"
+#include "error.h"
+#include "exitfail.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+void
+xstdopen (void)
+{
+  int stdopen_errno = stdopen ();
+  if (stdopen_errno != 0)
+    error (exit_failure, stdopen_errno, _("standard file descriptors"));
+}

lib/xstdopen.h

@@ -0,0 +1,28 @@
+/* Ensure that stdin, stdout, stderr are open.
+   Copyright (C) 2019 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

modules/xstdopen

@@ -0,0 +1,26 @@
+Description:
+Ensure that stdin, stdout, stderr are open.
+
+Files:
+lib/xstdopen.h
+lib/xstdopen.c
+
+Depends-on:
+stdopen
+error
+gettext-h
+exitfail
+
+configure.ac:
+
+Makefile.am:
+lib_SOURCES += xstdopen.c
+
+Include:
+"xstdopen.h"
+
+License:
+GPL
+
+Maintainer:
+all