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, 130 insertions, 0 deletions

diff --git a/libcons/dir-changed.c b/libcons/dir-changed.c
new file mode 100644
index 00000000..15b466a6
--- /dev/null
+++ b/libcons/dir-changed.c
@@ -0,0 +1,130 @@
+/* dir-changed.c - Handling dir changed notifications.
+   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 <dirent.h>
+#include <assert.h>
+#include <mach.h>
+#include <cthreads.h>
+
+#include "cons.h"
+#include "fs_notify_S.h"
+
+
+static error_t
+add_one (cons_t cons, char *name)
+{
+  unsigned long int nr;
+  char *tail;
+
+  errno = 0;
+  nr = strtoul (name, &tail, 10);
+  if (!errno && *tail == '\0' && nr > 0)
+    {
+      vcons_t vcons;
+      return cons_lookup (cons, nr, 1, &vcons);
+    }
+  return 0;
+}
+
+static error_t
+lookup_one (cons_t cons, char *name, vcons_t *vcons)
+{
+  unsigned long int nr;
+  char *tail;
+
+  errno = 0;
+  nr = strtoul (name, &tail, 10);
+  if (!errno && *tail == '\0' && nr > 0)
+    return cons_lookup (cons, nr, 0, vcons);
+  return 0;
+}
+
+
+kern_return_t
+cons_S_dir_changed (cons_notify_t notify, natural_t tickno,
+		    dir_changed_type_t change, string_t name)
+{
+  error_t err;
+  cons_t cons;
+
+  if (!notify || !notify->cons)
+    return EOPNOTSUPP;
+  cons = notify->cons;
+
+  mutex_lock (&cons->lock);
+
+  switch (change)
+    {
+    case DIR_CHANGED_NULL:
+      {
+	DIR *dir = cons->dir;
+	struct dirent *dent;
+	do
+	  {
+	    errno = 0;
+	    dent = readdir (dir);
+	    if (!dent && errno)
+	      err = errno;
+	    else if (dent)
+	      err = add_one (cons, dent->d_name);
+	  }
+	while (dent && !err);
+	if (err)
+	  assert ("Unexpected error");	/* XXX */
+      }
+      break;
+    case DIR_CHANGED_NEW:
+      {
+	err = add_one (cons, name);
+	if (err)
+	  assert ("Unexpected error");	/* XXX */
+      }
+      break;
+    case DIR_CHANGED_UNLINK:
+      {
+	vcons_t vcons;
+	err = lookup_one (cons, name, &vcons);
+	if (!err)
+	  {
+	    cons_vcons_remove (vcons);
+	    if (vcons->prev)
+	      vcons->prev->next = vcons->next;
+	    else
+	      cons->vcons_list = vcons->next;
+	    if (vcons->next)
+	      vcons->next->prev = vcons->prev;
+	    else
+	      cons->vcons_last = vcons->prev;
+
+	    /* XXX Destroy the state.  */
+	    free (vcons);
+	  }
+      }
+      break;
+    case DIR_CHANGED_RENUMBER:
+    default:
+      assert ("Unexpected dir-changed type.");
+      mutex_unlock (&cons->lock);
+     return EINVAL;
+    }
+  mutex_unlock (&cons->lock);
+  return 0;
+}