+ char *cmd_line, *pos;
+ char *argv[LOADER_CMD_LINE_LEN / 2 + 1];
+ int argc = 0;
+ int i;
+
+ /* The command line is made up of null terminated strings
+ followed by an empty string. Break it up into words. */
+ cmd_line = pos = ptov (LOADER_CMD_LINE);
+ while (pos < cmd_line + LOADER_CMD_LINE_LEN)
+ {
+ ASSERT (argc < LOADER_CMD_LINE_LEN / 2);
+ if (*pos == '\0')
+ break;
+ argv[argc++] = pos;
+ pos = strchr (pos, '\0') + 1;
+ }
+ argv[argc] = "";
+
+ /* Parse the words. */
+ for (i = 0; i < argc; i++)
+ if (!strcmp (argv[i], "-rs"))
+ random_init (atoi (argv[++i]));
+ else if (!strcmp (argv[i], "-d"))
+ debug_enable (argv[++i]);
+#ifdef USERPROG
+ else if (!strcmp (argv[i], "-ex"))
+ initial_program = argv[++i];
+#endif
+#ifdef FILESYS
+ else if (!strcmp (argv[i], "-f"))
+ format_filesys = true;
+ else if (!strcmp (argv[i], "-cp"))
+ fsutil_copy_arg = argv[++i];
+ else if (!strcmp (argv[i], "-p"))
+ fsutil_print_file = argv[++i];
+ else if (!strcmp (argv[i], "-r"))
+ fsutil_remove_file = argv[++i];
+ else if (!strcmp (argv[i], "-ls"))
+ fsutil_list_files = true;
+ else if (!strcmp (argv[i], "-D"))
+ fsutil_dump_filesys = true;
+#endif
+ else if (!strcmp (argv[i], "-u"))
+ {
+ printk (
+ "Kernel options:\n"
+ " -rs SEED Seed random seed to SEED.\n"
+ " -d CLASS[,...] Enable the given classes of debug messages.\n"
+#ifdef USERPROG
+ " -ex 'PROG [ARG...]' Run PROG, passing the optional arguments.\n"
+#endif
+#ifdef FILESYS
+ " -f Format the filesystem disk (hdb or hd0:1).\n"
+ " -cp FILENAME:SIZE Copy SIZE bytes from the scratch disk (hdc\n"
+ " or hd1:0) into the filesystem as FILENAME\n"
+ " -p FILENAME Print the contents of FILENAME\n"
+ " -r FILENAME Delete FILENAME\n"
+ " -ls List the files in the filesystem\n"
+ " -D Dump complete filesystem contents\n");
+#endif
+ }
+ else
+ PANIC ("unknown option `%s'", argv[i]);