libcons/

2002-08-22  Marcus Brinkmann  <marcus@gnu.org>

	* demuxer.c, init-init.c, init-loop.c, opts-version.c,
	extra-version.c, dir-changed.c, file-changed.c,
	opts-std-startup.c, cons-lookup.c, cons-switch.c, vcons-remove.c,
	vcons-add.c, vcons-open.c, vcons-close.c, vcons-refresh.c, priv.h,
	mutations.h, cons.h: New files.

1 files changed, 162 insertions, 0 deletions

diff --git a/libcons/vcons-open.c b/libcons/vcons-open.c
new file mode 100644
index 00000000..7256b4c8
--- /dev/null
+++ b/libcons/vcons-open.c
@@ -0,0 +1,162 @@
+/* vcons-open.c - Open 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 <stdio.h>
+#include <sys/mman.h>
+#include <sys/fcntl.h>
+
+#include <hurd.h>
+#include <mach.h>
+
+#include "cons.h"
+
+/* Open the virtual console VCONS.  VCONS->cons is locked.  */
+error_t
+cons_vcons_open (vcons_t vcons)
+{
+  error_t err = 0;
+  char *name;
+  file_t vconsp = MACH_PORT_NULL;
+  file_t file = MACH_PORT_NULL;
+  int fd = -1;
+  struct stat statbuf;
+  mach_port_t notify = MACH_PORT_NULL;
+
+  if (asprintf (&name, "%u", vcons->id) < 0)
+    return err;
+
+  /* Open the directory port of the virtual console.  */
+  vconsp = file_name_lookup_under (vcons->cons->dirport, name,
+				   O_DIRECTORY | O_RDONLY, 0);
+  if (vconsp == MACH_PORT_NULL)
+    {
+      err = errno;
+      goto err;
+    }
+
+  /* Within that directory, open the input node.  */
+  file = file_name_lookup_under (vconsp, "input", O_WRONLY /* | O_NONBLOCK */, 0);
+  if (file == MACH_PORT_NULL)
+    err = errno;
+  else
+    {
+      vcons->input = openport (file, O_WRONLY /* | O_NONBLOCK */);
+      if (vcons->input < 0)
+	err = errno;
+      else
+	/* openport() consumed the reference.  */
+	file = MACH_PORT_NULL;
+    }
+  if (err)
+    goto err;
+
+  /* Within that directory, also open the display node.  */
+  file = file_name_lookup_under (vconsp, "display", O_RDONLY, 0);
+  if (file == MACH_PORT_NULL)
+    err = errno;
+  else
+    {
+      /* Acquire an additional reference for openport().  */
+      err = mach_port_mod_refs (mach_task_self (), file,
+				MACH_PORT_RIGHT_SEND, +1);
+      if (err)
+	goto err;
+      fd = openport (file, O_RDONLY);
+      if (fd < 0)
+	err = errno;
+    }
+  if (err)
+    goto err;
+
+  /* Map the whole file.  */
+  if (fstat (fd, &statbuf) < 0)
+    {
+      err = errno;
+      goto err;
+    }
+  vcons->display_size = statbuf.st_size;
+  vcons->display = mmap (0, vcons->display_size, PROT_READ, MAP_SHARED, fd, 0);
+  if (vcons->display == MAP_FAILED)
+    {
+      err = errno;
+      goto err;
+    }
+
+  if (vcons->display->magic != CONS_MAGIC
+      || vcons->display->version >> CONS_VERSION_MAJ_SHIFT != 0)
+    {
+      err = EINVAL;
+      goto err;
+    }
+  vcons->state.screen.width = vcons->display->screen.width;
+  vcons->state.screen.height = vcons->display->screen.height;
+  vcons->state.screen.lines = vcons->display->screen.lines;
+  vcons->state.screen.matrix = ((wchar_t *) vcons->display)
+    + vcons->display->screen.matrix;
+  vcons->state.changes.length = vcons->display->changes.length;
+  vcons->state.changes.buffer = ((uint32_t *) vcons->display)
+    + vcons->display->changes.buffer;
+
+  /* Set up the port we receive notification messages on.  */
+  err = ports_create_port (cons_port_class, cons_port_bucket,
+                           sizeof (*vcons->notify), &vcons->notify);
+  if (err)
+    goto err;
+  vcons->notify->cons = NULL;
+  vcons->notify->vcons = vcons;
+
+  /* Request notification messages.  */
+  notify = ports_get_right (vcons->notify);
+  mach_port_set_qlimit (mach_task_self (), notify, 1);
+
+  /* When this succeeds, we will immediately receive notification
+     messages for this virtual console.  */
+  err = file_notice_changes (file, notify, MACH_MSG_TYPE_MAKE_SEND);
+  if (!err)
+    goto out;
+
+ err:
+  if (vcons->input >= 0)
+    {
+      close (vcons->input);
+      vcons->input = -1;
+    }
+  if (vcons->display != MAP_FAILED)
+    {
+      munmap (vcons->display, vcons->display_size);
+      vcons->display = MAP_FAILED;
+    }
+  if (notify)
+    {
+      mach_port_deallocate (mach_task_self (), notify);
+      vcons->notify = MACH_PORT_NULL;
+    }
+ out:
+  if (fd > 0)
+    close (fd);
+  if (file != MACH_PORT_NULL)
+    mach_port_deallocate (mach_task_self (), file);
+  if (vconsp != MACH_PORT_NULL)
+    mach_port_deallocate (mach_task_self (), vconsp);
+  free (name);
+  return err;
+}