Adding upstream version 2.06.upstream/2.06upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 200 insertions, 0 deletions

diff --git a/grub-core/kern/emu/hostfs.c b/grub-core/kern/emu/hostfs.c
new file mode 100644
index 0000000..cb53210
--- /dev/null
+++ b/grub-core/kern/emu/hostfs.c
@@ -0,0 +1,200 @@
+/* hostfs.c - Dummy filesystem to provide access to the hosts filesystem  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2007,2008,2009,2010  Free Software Foundation, Inc.
+ *
+ *  GRUB 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB 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 GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config-util.h>
+
+#include <grub/fs.h>
+#include <grub/file.h>
+#include <grub/disk.h>
+#include <grub/misc.h>
+#include <grub/mm.h>
+#include <grub/dl.h>
+#include <grub/util/misc.h>
+#include <grub/emu/hostdisk.h>
+#include <grub/i18n.h>
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+static int
+is_dir (const char *path, const char *name)
+{
+  int len1 = strlen(path);
+  int len2 = strlen(name);
+  int ret;
+
+  char *pathname = xmalloc (len1 + 1 + len2 + 1 + 13);
+  strcpy (pathname, path);
+
+  /* Avoid UNC-path "//name" on Cygwin.  */
+  if (len1 > 0 && pathname[len1 - 1] != '/')
+    strcat (pathname, "/");
+
+  strcat (pathname, name);
+
+  ret = grub_util_is_directory (pathname);
+  free (pathname);
+  return ret;
+}
+
+struct grub_hostfs_data
+{
+  char *filename;
+  grub_util_fd_t f;
+};
+
+static grub_err_t
+grub_hostfs_dir (grub_device_t device, const char *path,
+		 grub_fs_dir_hook_t hook, void *hook_data)
+{
+  grub_util_fd_dir_t dir;
+
+  /* Check if the disk is our dummy disk.  */
+  if (grub_strcmp (device->disk->name, "host"))
+    return grub_error (GRUB_ERR_BAD_FS, "not a hostfs");
+
+  dir = grub_util_fd_opendir (path);
+  if (! dir)
+    return grub_error (GRUB_ERR_BAD_FILENAME,
+		       N_("can't open `%s': %s"), path,
+		       grub_util_fd_strerror ());
+
+  while (1)
+    {
+      grub_util_fd_dirent_t de;
+      struct grub_dirhook_info info;
+      grub_memset (&info, 0, sizeof (info));
+
+      de = grub_util_fd_readdir (dir);
+      if (! de)
+	break;
+
+      info.dir = !! is_dir (path, de->d_name);
+      hook (de->d_name, &info, hook_data);
+
+    }
+
+  grub_util_fd_closedir (dir);
+
+  return GRUB_ERR_NONE;
+}
+
+/* Open a file named NAME and initialize FILE.  */
+static grub_err_t
+grub_hostfs_open (struct grub_file *file, const char *name)
+{
+  grub_util_fd_t f;
+  struct grub_hostfs_data *data;
+
+  f = grub_util_fd_open (name, GRUB_UTIL_FD_O_RDONLY);
+  if (! GRUB_UTIL_FD_IS_VALID (f))
+    return grub_error (GRUB_ERR_BAD_FILENAME,
+		       N_("can't open `%s': %s"), name,
+		       strerror (errno));
+  data = grub_malloc (sizeof (*data));
+  if (!data)
+    {
+      grub_util_fd_close (f);
+      return grub_errno;
+    }
+  data->filename = grub_strdup (name);
+  if (!data->filename)
+    {
+      grub_free (data);
+      grub_util_fd_close (f);
+      return grub_errno;
+    }
+
+  data->f = f;  
+
+  file->data = data;
+
+  file->size = grub_util_get_fd_size (f, name, NULL);
+
+  return GRUB_ERR_NONE;
+}
+
+static grub_ssize_t
+grub_hostfs_read (grub_file_t file, char *buf, grub_size_t len)
+{
+  struct grub_hostfs_data *data;
+
+  data = file->data;
+  if (grub_util_fd_seek (data->f, file->offset) != 0)
+    {
+      grub_error (GRUB_ERR_OUT_OF_RANGE, N_("cannot seek `%s': %s"),
+		  data->filename, grub_util_fd_strerror ());
+      return -1;
+    }
+
+  unsigned int s = grub_util_fd_read (data->f, buf, len);
+  if (s != len)
+    grub_error (GRUB_ERR_FILE_READ_ERROR, N_("cannot read `%s': %s"),
+		data->filename, grub_util_fd_strerror ());
+
+  return (signed) s;
+}
+
+static grub_err_t
+grub_hostfs_close (grub_file_t file)
+{
+  struct grub_hostfs_data *data;
+
+  data = file->data;
+  grub_util_fd_close (data->f);
+  grub_free (data->filename);
+  grub_free (data);
+
+  return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_hostfs_label (grub_device_t device __attribute ((unused)),
+		   char **label __attribute ((unused)))
+{
+  *label = 0;
+  return GRUB_ERR_NONE;
+}
+
+#undef open
+#undef close
+
+static struct grub_fs grub_hostfs_fs =
+  {
+    .name = "hostfs",
+    .fs_dir = grub_hostfs_dir,
+    .fs_open = grub_hostfs_open,
+    .fs_read = grub_hostfs_read,
+    .fs_close = grub_hostfs_close,
+    .fs_label = grub_hostfs_label,
+    .next = 0
+  };
+
+
+
+GRUB_MOD_INIT(hostfs)
+{
+  grub_fs_register (&grub_hostfs_fs);
+}
+
+GRUB_MOD_FINI(hostfs)
+{
+  grub_fs_unregister (&grub_hostfs_fs);
+}