initial import

1 files changed, 85 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/defs.c b/sysdeps/mach/hurd/defs.c
new file mode 100644
index 0000000000..b2cfe7c4ff
--- /dev/null
+++ b/sysdeps/mach/hurd/defs.c
@@ -0,0 +1,85 @@
+/* Definitions of global stdio data structures.
+
+Copyright (C) 1991, 1992, 1993, 1994, 1995 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 <stdio.h>
+#include <hurd/fd.h>
+#include <unistd.h>
+
+FILE *stdin, *stdout, *stderr;
+
+/* Pointer to the first stream in the list.  */
+FILE *__stdio_head = NULL;
+
+static void
+init_stdio (void)
+{
+  inline void init (FILE **streamptr, int fd)
+    {
+      /* We want to use the existing FILE object if one has been allocated.
+	 (This will only be the case if our image came from something like
+	 Emacs's unexec, where we were called in the first run.)  */
+      FILE *s = *streamptr ?: __newstream ();
+      struct hurd_fd *d = _hurd_fd_get (fd);
+      if (d == NULL)
+	{
+	  /* There is no file descriptor allocated.  We want the standard
+	     streams to always refer to their standard file descriptors, even
+	     if those descriptors are not set up until later.  So allocate
+	     the descriptor structure with no ports and store it in the
+	     stream.  Operations will fail until ports are installed in the
+	     file descriptor.  */
+	  if (d = _hurd_alloc_fd (NULL, fd))
+	    __spin_unlock (&d->port.lock);
+	}
+      if (s)
+	s->__cookie = d;
+      *streamptr = s;
+    }
+#define S(NAME, FD, MODE) \
+  init (&NAME, FD); if (NAME) NAME->__mode.__##MODE = 1;
+
+  S (stdin, STDIN_FILENO, read);
+  S (stdout, STDOUT_FILENO, write);
+  S (stderr, STDERR_FILENO, write);
+
+#undef S
+
+  if (stderr)
+    stderr->__userbuf = 1;	/* stderr is always unbuffered.  */
+
+  (void) &init_stdio;		/* Avoid "defined but not used" warning.  */
+}
+text_set_element (_hurd_fd_subinit, init_stdio);
+
+/* 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);
+}
+text_set_element (__libc_atexit, _cleanup);