2002-09-14 Marcus Brinkmann <marcus@gnu.org>

	* Makefile (SRCS): Add vcons-input.c.
	* vcons-input.c: New file.

	* vcons-scrollback.c (_cons_vcons_scrollback): New function.
	(cons_vcons_scrollback): Reimplement in terms of
	_cons_vcons_scrollback.
	* cons.h (cons_scroll_t): New type.
	(cons_vcons_scrollback): Update prototype.

	* priv.h (_cons_jump_down_at_input): New extern.
	(_cons_jump_down_at_output): Likewise.
	(_cons_vcons_scrollback): New prototype.
	* opts-std-startup.c (OPT_JUMP_DOWN_AT_INPUT): New macro.
	(OPT_JUMP_DOWN_AT_OUTPUT): Likewise.
	(_cons_jump_down_at_input): New variable.
	(_cons_jump_down_at_output): Likewise.
	(startup_options): Add new options --jump-down-at-input and
	--jump-down-at-output.
	(parse_startup_opt): Handle these new options.
	* file-changed.c (cons_S_file_changed): Support the jump down at
	output option.

1 files changed, 54 insertions, 0 deletions

diff --git a/libcons/vcons-input.c b/libcons/vcons-input.c
new file mode 100644
index 00000000..83cc8846
--- /dev/null
+++ b/libcons/vcons-input.c
@@ -0,0 +1,54 @@
+/* vcons-input.c - Add input to a virtual console.
+   Copyright (C) 2002 Free Software Foundation, Inc.
+   Written by Marcus Brinkmann.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd 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 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. */
+
+#include <errno.h>
+#include <unistd.h>
+
+#include "cons.h"
+#include "priv.h"
+
+/* Enter SIZE bytes from the buffer BUF into the virtual console
+   VCONS.  */
+error_t
+cons_vcons_input (vcons_t vcons, char *buf, size_t size)
+{
+  int ret;
+
+  mutex_lock (&vcons->lock);
+
+  if (vcons->scrolling && _cons_jump_down_at_input)
+    _cons_vcons_scrollback (vcons, CONS_SCROLL_ABSOLUTE_LINE, 0);
+
+  do
+    {
+      ret = write (vcons->input, buf, size);
+      if (ret > 0)
+	{
+	  size -= ret;
+	  buf += ret;
+	}
+    }
+  while (size && (ret != -1 || errno == EINTR));
+
+  mutex_unlock (&vcons->lock);
+  return 0;
+}
+
+