From c65388feeea5dc5218d4100d65733f7a268dafb8 Mon Sep 17 00:00:00 2001
From: Miles Bader <miles@gnu.org>
Date: Wed, 9 Jul 1997 20:17:26 +0000
Subject: Initial checkin

---
 sutils/swapon.c | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 sutils/swapon.c

(limited to 'sutils/swapon.c')

diff --git a/sutils/swapon.c b/sutils/swapon.c
new file mode 100644
index 00000000..a1e9e63f
--- /dev/null
+++ b/sutils/swapon.c
@@ -0,0 +1,130 @@
+/* Add/remove paging devices
+
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+   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 <hurd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <argp.h>
+#include <error.h>
+#include <hurd/store.h>
+#include <version.h>
+#include <mach/default_pager.h>
+
+#ifdef SWAPOFF
+const char *argp_program_version = STANDARD_HURD_VERSION (swapoff);
+#else
+const char *argp_program_version = STANDARD_HURD_VERSION (swapon);
+#endif
+
+static struct argp_option options[] =
+{
+  {"standard",	  'a', 0, 0, "Use all devices marked as `sw' in /etc/fstab"},
+  {0, 0}
+};
+static char *args_doc = "DEVICE...";
+
+#ifdef SWAPOFF
+static char *doc = "Stop paging onto DEVICE...";
+#else
+static char *doc = "Start paging onto DEVICE...";
+#endif
+
+static void
+swaponoff (char *file, int add)
+{
+  error_t err;
+  struct store *store;
+  static mach_port_t def_pager = MACH_PORT_NULL;
+  static mach_port_t dev_master = MACH_PORT_NULL;
+
+  err = store_open (file, 0, 0, &store);
+  if (err)
+    {
+      error (0, err, "%s", file);
+      return;
+    }
+
+  if (store->class != &store_device_class)
+    {
+      error (0, 0, "%s: Can't get device", file);
+      return;
+    }
+  if (! (store->flags & STORE_ENFORCED))
+    {
+      error (0, 0, "%s: Can only page to the entire device", file);
+      return;
+    }
+
+  if (def_pager == MACH_PORT_NULL)
+    {
+      mach_port_t host;
+
+      err = get_privileged_ports (&host, &dev_master);
+      if (err)
+	error (12, err, "Cannot get host port");
+
+      err = vm_set_default_memory_manager (host, &def_pager);
+      mach_port_deallocate (mach_task_self (), host);
+      if (err)
+	error (13, err, "Cannot get default pager port");
+    }
+
+  {
+    char pname[sizeof "/dev/" + strlen (store->name) + 1];
+    snprintf (pname, sizeof pname, "/dev/%s", store->name);
+    err = default_pager_paging_file (def_pager, dev_master, pname, add);
+    if (err)
+      error (0, err, "%s", file);
+  }
+
+  store_free (store);
+}
+
+void 
+main(int argc, char *argv[])
+{
+  /* Parse our options...  */
+  error_t parse_opt (int key, char *arg, struct argp_state *state)
+    {
+      switch (key)
+	{
+	case 'a':
+	  argp_failure (state, 5, 0, "--standard: Not supported yet"); 
+
+	case ARGP_KEY_ARG:
+#ifdef SWAPOFF
+	  swaponoff (arg, 0);
+#else
+	  swaponoff (arg, 1);
+#endif
+	  break;
+
+	default:
+	  return ARGP_ERR_UNKNOWN;
+	}
+      return 0;
+    }
+  struct argp argp = {options, parse_opt, args_doc, doc};
+
+  argp_parse (&argp, argc, argv, 0, 0, 0);
+
+  exit(0);
+}
-- 
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