Adding upstream version 2.06.upstream/2.06upstream

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

1 files changed, 133 insertions, 0 deletions

diff --git a/grub-core/commands/hexdump.c b/grub-core/commands/hexdump.c
new file mode 100644
index 0000000..eaa1246
--- /dev/null
+++ b/grub-core/commands/hexdump.c
@@ -0,0 +1,133 @@
+/* hexdump.c - command to dump the contents of a file or memory */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2007,2008,2009  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 <grub/dl.h>
+#include <grub/file.h>
+#include <grub/disk.h>
+#include <grub/misc.h>
+#include <grub/lib/hexdump.h>
+#include <grub/extcmd.h>
+#include <grub/i18n.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+static const struct grub_arg_option options[] = {
+  {"skip", 's', 0, N_("Skip offset bytes from the beginning of file."), 0,
+   ARG_TYPE_INT},
+  {"length", 'n', 0, N_("Read only LENGTH bytes."), 0, ARG_TYPE_INT},
+  {0, 0, 0, 0, 0, 0}
+};
+
+static grub_err_t
+grub_cmd_hexdump (grub_extcmd_context_t ctxt, int argc, char **args)
+{
+  struct grub_arg_list *state = ctxt->state;
+  char buf[GRUB_DISK_SECTOR_SIZE * 4];
+  grub_ssize_t size, length;
+  grub_disk_addr_t skip;
+  int namelen;
+
+  if (argc != 1)
+    return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("filename expected"));
+
+  namelen = grub_strlen (args[0]);
+  skip = (state[0].set) ? grub_strtoull (state[0].arg, 0, 0) : 0;
+  length = (state[1].set) ? grub_strtoul (state[1].arg, 0, 0) : 256;
+
+  if (!grub_strcmp (args[0], "(mem)"))
+    hexdump (skip, (char *) (grub_addr_t) skip, length);
+  else if ((args[0][0] == '(') && (args[0][namelen - 1] == ')'))
+    {
+      grub_disk_t disk;
+      grub_disk_addr_t sector;
+      grub_size_t ofs;
+
+      args[0][namelen - 1] = 0;
+      disk = grub_disk_open (&args[0][1]);
+      if (! disk)
+        return 0;
+
+      sector = (skip >> (GRUB_DISK_SECTOR_BITS + 2)) * 4;
+      ofs = skip & (GRUB_DISK_SECTOR_SIZE * 4 - 1);
+      while (length)
+        {
+          grub_size_t len;
+
+          len = length;
+          if (len > sizeof (buf))
+            len = sizeof (buf);
+
+          if (grub_disk_read (disk, sector, ofs, len, buf))
+            break;
+
+          hexdump (skip, buf, len);
+
+          ofs = 0;
+          skip += len;
+          length -= len;
+          sector += 4;
+        }
+
+      grub_disk_close (disk);
+    }
+  else
+    {
+      grub_file_t file;
+
+      file = grub_file_open (args[0], GRUB_FILE_TYPE_HEXCAT);
+      if (! file)
+	return 0;
+
+      file->offset = skip;
+
+      while ((size = grub_file_read (file, buf, sizeof (buf))) > 0)
+	{
+	  unsigned long len;
+
+	  len = ((length) && (size > length)) ? length : size;
+	  hexdump (skip, buf, len);
+	  skip += len;
+	  if (length)
+	    {
+	      length -= len;
+	      if (!length)
+		break;
+	    }
+	}
+
+      grub_file_close (file);
+    }
+
+  return 0;
+}
+
+static grub_extcmd_t cmd;
+
+GRUB_MOD_INIT (hexdump)
+{
+  cmd = grub_register_extcmd ("hexdump", grub_cmd_hexdump, 0,
+			      N_("[OPTIONS] FILE_OR_DEVICE"),
+			      N_("Show raw contents of a file or memory."),
+			      options);
+}
+
+GRUB_MOD_FINI (hexdump)
+{
+  grub_unregister_extcmd (cmd);
+}