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Diffstat (limited to 'sysdeps/posix/defs.c')
-rw-r--r--sysdeps/posix/defs.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/sysdeps/posix/defs.c b/sysdeps/posix/defs.c
new file mode 100644
index 0000000000..fcbaf16f69
--- /dev/null
+++ b/sysdeps/posix/defs.c
@@ -0,0 +1,76 @@
+/* Definitions of global stdio data structures.
+
+Copyright (C) 1991, 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+
+/* This file defines all the global internal variables for stdio. */
+
+/* Standard streams. */
+#define READ 1, 0
+#define WRITE 0, 1
+#define BUFFERED 0
+#define UNBUFFERED 1
+#define stdstream(name, next, fd, readwrite, unbuffered) \
+ { \
+ _IOMAGIC, \
+ NULL, NULL, NULL, NULL, 0, \
+ (PTR) fd, \
+ { readwrite, /* ... */ }, \
+ { NULL, NULL, NULL, NULL, NULL }, \
+ { NULL, NULL }, \
+ -1, -1, \
+ (next), \
+ NULL, '\0', 0, \
+ 0, 0, unbuffered, 0, 0, 0, 0 \
+ }
+static FILE stdstreams[3] =
+ {
+ stdstream (&stdstreams[0], &stdstreams[1], STDIN_FILENO, READ, BUFFERED),
+ stdstream (&stdstreams[1], &stdstreams[2], STDOUT_FILENO, WRITE, BUFFERED),
+ stdstream (&stdstreams[2], NULL, STDERR_FILENO, WRITE, UNBUFFERED),
+ };
+FILE *stdin = &stdstreams[0];
+FILE *stdout = &stdstreams[1];
+FILE *stderr = &stdstreams[2];
+
+/* Pointer to the first stream in the list. */
+FILE *__stdio_head = &stdstreams[0];
+
+/* This function MUST be in this file!
+ This is because we want _cleanup to go into the __libc_atexit set
+ when any stdio code is used (and to use any stdio code, one must reference
+ something defined in this file), and since only local symbols can be made
+ set elements, having the set element stab entry here and _cleanup elsewhere
+ loses; and having them both elsewhere loses because there is no reference
+ to cause _cleanup to be linked in. */
+
+void
+DEFUN_VOID(_cleanup)
+{
+ (void) fclose((FILE *) NULL);
+}
+
+
+#ifdef HAVE_GNU_LD
+text_set_element(__libc_atexit, _cleanup);
+#endif