1 files changed, 94 insertions, 0 deletions
diff --git a/libdiskfs/opts-set.c b/libdiskfs/opts-set.c
new file mode 100644
index 00000000..77929e7e
--- /dev/null
+++ b/libdiskfs/opts-set.c
@@ -0,0 +1,94 @@
+/* Parse run-time options
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "priv.h"
+
+#define SHORT_OPTIONS "rwsnm"
+
+static struct option long_options[] =
+{
+  {"readonly", no_argument, 0, 'r'},
+  {"writable", no_argument, 0, 'w'},
+  {"sync", optional_argument, 0, 's'},
+  {"nosync", no_argument, 0, 'n'},
+  {"remount", no_argument, 0, 'm'},
+  {0, 0, 0, 0}
+};
+
+error_t
+diskfs_set_options (int argc, char **argv)
+{
+  int readonly = diskfs_readonly;
+  int sync = diskfs_synchronous;
+  int sync_interval = -1;
+  error_t parse_opt (int opt, char *arg)
+    {
+      switch (opt)
+	{
+	case 'r':
+	  readonly = 1; break;
+	case 'w':
+	  readonly = 0; break;
+	case 'n':
+	  sync_interval = 0; sync = 0; break;
+	case 's':
+	  if (optarg)
+	    sync_interval = atoi (arg);
+	  else
+	    sync = 1;
+	default:
+	  return EINVAL;
+	}
+      return 0;
+    }
+  struct options options = { SHORT_OPTIONS, long_options, parse_opt, 0 };
+
+  /* Call the user option parsing routine, giving it our set of options to do
+     with as it pleases.  */
+  error_t err = diskfs_parse_runtime_options (argc, argv, &options);
+
+  if (err)
+    return err;
+
+  /* Do things in this order: change-read/write, remount, change-sync. */
+
+  /* Going writable seems easy, but how do we switch to readonly mode?  There
+     might be thread that are past the initial readonly checks which would
+     fail a !readonly assertion if we just set the variable...  */
+  if (!readonly)
+    diskfs_readonly = 0;
+
+  /* Remount...  */
+
+  /* Change sync mode.  */
+  if (sync)
+    {
+      diskfs_synchronous = 1;
+      diskfs_set_sync_interval (0); /* Don't waste time syncing.  */
+    }
+  else
+    {
+      diskfs_synchronous = 0;
+      if (sync_interval >= 0)
+	diskfs_set_sync_interval (sync_interval);
+    }
+
+  return 0;
+}