gudev: move from udev-extras

GObject libudev access. Initial version from Bastien Nocera, current
version by David Zeuthen.

1 files changed, 891 insertions, 0 deletions

diff --git a/extras/gudev/gudevdevice.c b/extras/gudev/gudevdevice.c
new file mode 100644
index 0000000000..76f2d7e5f8
--- /dev/null
+++ b/extras/gudev/gudevdevice.c
@@ -0,0 +1,891 @@
+/* -*- Mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ *
+ * Copyright (C) 2008 David Zeuthen <davidz@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "gudevdevice.h"
+#include "gudevprivate.h"
+
+/**
+ * SECTION:gudevdevice
+ * @short_description: Get information about a device
+ *
+ * The #GUdevDevice class is used to get information about a specific
+ * device. Note that you cannot instantiate a #GUdevDevice object
+ * yourself. Instead you must use #GUdevClient to obtain #GUdevDevice
+ * objects.
+ *
+ * To get basic information about a device, use
+ * g_udev_device_get_subsystem(), g_udev_device_get_devtype(),
+ * g_udev_device_get_name(), g_udev_device_get_number(),
+ * g_udev_device_get_sysfs_path(), g_udev_device_get_driver(),
+ * g_udev_device_get_action(), g_udev_device_get_seqnum(),
+ * g_udev_device_get_device_type(), g_udev_device_get_device_number(),
+ * g_udev_device_get_device_file(),
+ * g_udev_device_get_device_file_symlinks().
+ *
+ * To navigate the device tree, use g_udev_device_get_parent() and
+ * g_udev_device_get_parent_with_subsystem().
+ *
+ * To access udev properties for the device, use
+ * g_udev_device_get_property_keys(),
+ * g_udev_device_has_property(),
+ * g_udev_device_get_property(),
+ * g_udev_device_get_property_as_int(),
+ * g_udev_device_get_property_as_uint64(),
+ * g_udev_device_get_property_as_double(),
+ * g_udev_device_get_property_as_boolean() and
+ * g_udev_device_get_property_as_strv().
+ *
+ * To access sysfs attributes for the device, use
+ * g_udev_device_get_sysfs_attr(),
+ * g_udev_device_get_sysfs_attr_as_int(),
+ * g_udev_device_get_sysfs_attr_as_uint64(),
+ * g_udev_device_get_sysfs_attr_as_double(),
+ * g_udev_device_get_sysfs_attr_as_boolean() and
+ * g_udev_device_get_sysfs_attr_as_strv().
+ *
+ * Note that all getters on #GUdevDevice are non-reffing – returned
+ * values are owned by the object, should not be freed and are only
+ * valid as long as the object is alive.
+ *
+ * By design, #GUdevDevice will not react to changes for a device – it
+ * only contains a snapshot of information when the #GUdevDevice
+ * object was created. To work with changes, you typically connect to
+ * the #GUdevClient::uevent signal on a #GUdevClient and get a new
+ * #GUdevDevice whenever an event happens.
+ */
+
+struct _GUdevDevicePrivate
+{
+  struct udev_device *udevice;
+
+  /* computed ondemand and cached */
+  gchar **device_file_symlinks;
+  gchar **property_keys;
+  GHashTable *prop_strvs;
+  GHashTable *sysfs_attr_strvs;
+};
+
+G_DEFINE_TYPE (GUdevDevice, g_udev_device, G_TYPE_OBJECT)
+
+static void
+g_udev_device_finalize (GObject *object)
+{
+  GUdevDevice *device = G_UDEV_DEVICE (object);
+
+  g_strfreev (device->priv->device_file_symlinks);
+  g_strfreev (device->priv->property_keys);
+
+  if (device->priv->udevice != NULL)
+    udev_device_unref (device->priv->udevice);
+
+  if (device->priv->prop_strvs != NULL)
+    g_hash_table_unref (device->priv->prop_strvs);
+
+  if (device->priv->sysfs_attr_strvs != NULL)
+    g_hash_table_unref (device->priv->sysfs_attr_strvs);
+
+  if (G_OBJECT_CLASS (g_udev_device_parent_class)->finalize != NULL)
+    (* G_OBJECT_CLASS (g_udev_device_parent_class)->finalize) (object);
+}
+
+static void
+g_udev_device_class_init (GUdevDeviceClass *klass)
+{
+  GObjectClass *gobject_class = (GObjectClass *) klass;
+
+  gobject_class->finalize = g_udev_device_finalize;
+
+  g_type_class_add_private (klass, sizeof (GUdevDevicePrivate));
+}
+
+static void
+g_udev_device_init (GUdevDevice *device)
+{
+  device->priv = G_TYPE_INSTANCE_GET_PRIVATE (device,
+                                              G_UDEV_TYPE_DEVICE,
+                                              GUdevDevicePrivate);
+}
+
+
+GUdevDevice *
+_g_udev_device_new (struct udev_device *udevice)
+{
+  GUdevDevice *device;
+
+  device =  G_UDEV_DEVICE (g_object_new (G_UDEV_TYPE_DEVICE, NULL));
+  device->priv->udevice = udev_device_ref (udevice);
+
+  return device;
+}
+
+/**
+ * g_udev_device_get_subsystem:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the subsystem for @device.
+ *
+ * Returns: The subsystem for @device.
+ */
+const gchar *
+g_udev_device_get_subsystem (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_subsystem (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_devtype:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the device type for @device.
+ *
+ * Returns: The devtype for @device.
+ */
+const gchar *
+g_udev_device_get_devtype (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_devtype (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_name:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the name of @device, e.g. "sda3".
+ *
+ * Returns: The name of @device.
+ */
+const gchar *
+g_udev_device_get_name (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_sysname (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_number:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the number of @device, e.g. "3" if g_udev_device_get_name() returns "sda3".
+ *
+ * Returns: The number of @device.
+ */
+const gchar *
+g_udev_device_get_number (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_sysnum (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_sysfs_path:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the sysfs path for @device.
+ *
+ * Returns: The sysfs path for @device.
+ */
+const gchar *
+g_udev_device_get_sysfs_path (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_syspath (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_driver:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the name of the driver used for @device.
+ *
+ * Returns: The name of the driver for @device or %NULL if unknown.
+ */
+const gchar *
+g_udev_device_get_driver (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_driver (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_action:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the most recent action (e.g. "add", "remove", "change", etc.) for @device.
+ *
+ * Returns: An action string.
+ */
+const gchar *
+g_udev_device_get_action (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_action (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_seqnum:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the most recent sequence number for @device.
+ *
+ * Returns: A sequence number.
+ */
+guint64
+g_udev_device_get_seqnum (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0);
+  return udev_device_get_seqnum (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_device_type:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the type of the device file, if any, for @device.
+ *
+ * Returns: The device number for @device or #G_UDEV_DEVICE_TYPE_NONE if the device does not have a device file.
+ */
+GUdevDeviceType
+g_udev_device_get_device_type (GUdevDevice *device)
+{
+  struct stat stat_buf;
+  const gchar *device_file;
+  GUdevDeviceType type;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), G_UDEV_DEVICE_TYPE_NONE);
+
+  type = G_UDEV_DEVICE_TYPE_NONE;
+
+  /* TODO: would be better to have support for this in libudev... */
+
+  device_file = g_udev_device_get_device_file (device);
+  if (device_file == NULL)
+    goto out;
+
+  if (stat (device_file, &stat_buf) != 0)
+    goto out;
+
+  if (S_ISBLK (stat_buf.st_mode))
+    type = G_UDEV_DEVICE_TYPE_BLOCK;
+  else if (S_ISCHR (stat_buf.st_mode))
+    type = G_UDEV_DEVICE_TYPE_CHAR;
+
+ out:
+  return type;
+}
+
+/**
+ * g_udev_device_get_device_number:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the device number, if any, for @device.
+ *
+ * Returns: The device number for @device or 0 if unknown.
+ */
+GUdevDeviceNumber
+g_udev_device_get_device_number (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0);
+  return udev_device_get_devnum (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_device_file:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the device file for @device.
+ *
+ * Returns: The device file for @device or %NULL if no device file
+ * exists.
+ */
+const gchar *
+g_udev_device_get_device_file (GUdevDevice *device)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  return udev_device_get_devnode (device->priv->udevice);
+}
+
+/**
+ * g_udev_device_get_device_file_symlinks:
+ * @device: A #GUdevDevice.
+ *
+ * Gets a list of symlinks (in <literal>/dev</literal>) that points to
+ * the device file for @device.
+ *
+ * Returns: (transfer none) (array zero-terminated=1) (element-type utf8): A %NULL terminated string array of symlinks. This array is owned by @device and should not be freed by the caller.
+ */
+const gchar * const *
+g_udev_device_get_device_file_symlinks (GUdevDevice *device)
+{
+  struct udev_list_entry *l;
+  GPtrArray *p;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+
+  if (device->priv->device_file_symlinks != NULL)
+    goto out;
+
+  p = g_ptr_array_new ();
+  for (l = udev_device_get_devlinks_list_entry (device->priv->udevice); l != NULL; l = udev_list_entry_get_next (l))
+    {
+      g_ptr_array_add (p, g_strdup (udev_list_entry_get_name (l)));
+    }
+  g_ptr_array_add (p, NULL);
+  device->priv->device_file_symlinks = (gchar **) g_ptr_array_free (p, FALSE);
+
+ out:
+  return (const gchar * const *) device->priv->device_file_symlinks;
+}
+
+/* ---------------------------------------------------------------------------------------------------- */
+
+/**
+ * g_udev_device_get_parent:
+ * @device: A #GUdevDevice.
+ *
+ * Gets the immediate parent of @device, if any.
+ *
+ * Returns: A #GUdevDevice or %NULL if @device has no parent. Free with g_object_unref().
+ */
+GUdevDevice *
+g_udev_device_get_parent (GUdevDevice  *device)
+{
+  GUdevDevice *ret;
+  struct udev_device *udevice;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+
+  ret = NULL;
+
+  udevice = udev_device_get_parent (device->priv->udevice);
+  if (udevice == NULL)
+    goto out;
+
+  ret = _g_udev_device_new (udevice);
+
+ out:
+  return ret;
+}
+
+/**
+ * g_udev_device_get_parent_with_subsystem:
+ * @device: A #GUdevDevice.
+ * @subsystem: The subsystem of the parent to get.
+ * @devtype: (allow-none): The devtype of the parent to get or %NULL.
+ *
+ * Walks up the chain of parents of @device and returns the first
+ * device encountered where @subsystem and @devtype matches, if any.
+ *
+ * Returns: A #GUdevDevice or %NULL if @device has no parent with @subsystem and @devtype. Free with g_object_unref().
+ */
+GUdevDevice *
+g_udev_device_get_parent_with_subsystem (GUdevDevice  *device,
+                                         const gchar  *subsystem,
+                                         const gchar  *devtype)
+{
+  GUdevDevice *ret;
+  struct udev_device *udevice;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  g_return_val_if_fail (subsystem != NULL, NULL);
+
+  ret = NULL;
+
+  udevice = udev_device_get_parent_with_subsystem_devtype (device->priv->udevice,
+                                                           subsystem,
+                                                           devtype);
+  if (udevice == NULL)
+    goto out;
+
+  ret = _g_udev_device_new (udevice);
+
+ out:
+  return ret;
+}
+
+/* ---------------------------------------------------------------------------------------------------- */
+
+/**
+ * g_udev_device_get_property_keys:
+ * @device: A #GUdevDevice.
+ *
+ * Gets all keys for properties on @device.
+ *
+ * Returns: (transfer none) (array zero-terminated=1) (element-type utf8): A %NULL terminated string array of property keys. This array is owned by @device and should not be freed by the caller.
+ */
+const gchar* const *
+g_udev_device_get_property_keys (GUdevDevice *device)
+{
+  struct udev_list_entry *l;
+  GPtrArray *p;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+
+  if (device->priv->property_keys != NULL)
+    goto out;
+
+  p = g_ptr_array_new ();
+  for (l = udev_device_get_properties_list_entry (device->priv->udevice); l != NULL; l = udev_list_entry_get_next (l))
+    {
+      g_ptr_array_add (p, g_strdup (udev_list_entry_get_name (l)));
+    }
+  g_ptr_array_add (p, NULL);
+  device->priv->property_keys = (gchar **) g_ptr_array_free (p, FALSE);
+
+ out:
+  return (const gchar * const *) device->priv->property_keys;
+}
+
+
+/**
+ * g_udev_device_has_property:
+ * @device: A #GUdevDevice.
+ * @key: Name of property.
+ *
+ * Check if a the property with the given key exists.
+ *
+ * Returns: %TRUE only if the value for @key exist.
+ */
+gboolean
+g_udev_device_has_property (GUdevDevice  *device,
+                            const gchar  *key)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), FALSE);
+  g_return_val_if_fail (key != NULL, FALSE);
+  return udev_device_get_property_value (device->priv->udevice, key) != NULL;
+}
+
+/**
+ * g_udev_device_get_property:
+ * @device: A #GUdevDevice.
+ * @key: Name of property.
+ *
+ * Look up the value for @key on @device.
+ *
+ * Returns: The value for @key or %NULL if @key doesn't exist on @device. Do not free this string, it is owned by @device.
+ */
+const gchar *
+g_udev_device_get_property (GUdevDevice  *device,
+                            const gchar  *key)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  g_return_val_if_fail (key != NULL, NULL);
+  return udev_device_get_property_value (device->priv->udevice, key);
+}
+
+/**
+ * g_udev_device_get_property_as_int:
+ * @device: A #GUdevDevice.
+ * @key: Name of property.
+ *
+ * Look up the value for @key on @device and convert it to an integer
+ * using strtol().
+ *
+ * Returns: The value for @key or 0 if @key doesn't exist or
+ * isn't an integer.
+ */
+gint
+g_udev_device_get_property_as_int (GUdevDevice  *device,
+                                   const gchar  *key)
+{
+  gint result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0);
+  g_return_val_if_fail (key != NULL, 0);
+
+  result = 0;
+  s = g_udev_device_get_property (device, key);
+  if (s == NULL)
+    goto out;
+
+  result = strtol (s, NULL, 0);
+out:
+  return result;
+}
+
+/**
+ * g_udev_device_get_property_as_uint64:
+ * @device: A #GUdevDevice.
+ * @key: Name of property.
+ *
+ * Look up the value for @key on @device and convert it to an unsigned
+ * 64-bit integer using strtoll().
+ *
+ * Returns: The value  for @key or 0 if @key doesn't  exist or isn't a
+ * #guint64.
+ */
+guint64
+g_udev_device_get_property_as_uint64 (GUdevDevice  *device,
+                                      const gchar  *key)
+{
+  guint64 result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0);
+  g_return_val_if_fail (key != NULL, 0);
+
+  result = 0;
+  s = g_udev_device_get_property (device, key);
+  if (s == NULL)
+    goto out;
+
+  result = strtoll (s, NULL, 0);
+out:
+  return result;
+}
+
+/**
+ * g_udev_device_get_property_as_double:
+ * @device: A #GUdevDevice.
+ * @key: Name of property.
+ *
+ * Look up the value for @key on @device and convert it to a double
+ * precision floating point number using strtod().
+ *
+ * Returns: The value for @key or 0.0 if @key doesn't exist or isn't a
+ * #gdouble.
+ */
+gdouble
+g_udev_device_get_property_as_double (GUdevDevice  *device,
+                                      const gchar  *key)
+{
+  gdouble result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0.0);
+  g_return_val_if_fail (key != NULL, 0.0);
+
+  result = 0.0;
+  s = g_udev_device_get_property (device, key);
+  if (s == NULL)
+    goto out;
+
+  result = strtod (s, NULL);
+out:
+  return result;
+}
+
+/**
+ * g_udev_device_get_property_as_boolean:
+ * @device: A #GUdevDevice.
+ * @key: Name of property.
+ *
+ * Look up the value for @key on @device and convert it to an
+ * boolean. This is done by doing a case-insensitive string comparison
+ * on the string value against "1" and "true".
+ *
+ * Returns: The value for @key or %FALSE if @key doesn't exist or
+ * isn't a #gboolean.
+ */
+gboolean
+g_udev_device_get_property_as_boolean (GUdevDevice  *device,
+                                       const gchar  *key)
+{
+  gboolean result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), FALSE);
+  g_return_val_if_fail (key != NULL, FALSE);
+
+  result = FALSE;
+  s = g_udev_device_get_property (device, key);
+  if (s == NULL)
+    goto out;
+
+  if (strcmp (s, "1") == 0 || g_ascii_strcasecmp (s, "true") == 0)
+    result = TRUE;
+ out:
+  return result;
+}
+
+static gchar **
+split_at_whitespace (const gchar *s)
+{
+  gchar **result;
+  guint n;
+  guint m;
+
+  result = g_strsplit_set (s, " \v\t\r\n", 0);
+
+  /* remove empty strings, thanks GLib */
+  for (n = 0; result[n] != NULL; n++)
+    {
+      if (strlen (result[n]) == 0)
+        {
+          g_free (result[n]);
+          for (m = n; result[m] != NULL; m++)
+            result[m] = result[m + 1];
+          n--;
+        }
+    }
+
+  return result;
+}
+
+/**
+ * g_udev_device_get_property_as_strv:
+ * @device: A #GUdevDevice.
+ * @key: Name of property.
+ *
+ * Look up the value for @key on @device and return the result of
+ * splitting it into non-empty tokens split at white space (only space
+ * (' '), form-feed ('\f'), newline ('\n'), carriage return ('\r'),
+ * horizontal tab ('\t'), and vertical tab ('\v') are considered; the
+ * locale is not taken into account).
+ *
+ * Returns: (transfer none) (array zero-terminated=1) (element-type utf8): The value of @key on @device split into tokens or %NULL if @key doesn't exist. This array is owned by @device and should not be freed by the caller.
+ */
+const gchar* const *
+g_udev_device_get_property_as_strv (GUdevDevice  *device,
+                                    const gchar  *key)
+{
+  gchar **result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  g_return_val_if_fail (key != NULL, NULL);
+
+  if (device->priv->prop_strvs != NULL)
+    {
+      result = g_hash_table_lookup (device->priv->prop_strvs, key);
+      if (result != NULL)
+        goto out;
+    }
+
+  result = NULL;
+  s = g_udev_device_get_property (device, key);
+  if (s == NULL)
+    goto out;
+
+  result = split_at_whitespace (s);
+  if (result == NULL)
+    goto out;
+
+  if (device->priv->prop_strvs == NULL)
+    device->priv->prop_strvs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_strfreev);
+  g_hash_table_insert (device->priv->prop_strvs, g_strdup (key), result);
+
+out:
+  return (const gchar* const *) result;
+}
+
+/* ---------------------------------------------------------------------------------------------------- */
+
+/**
+ * g_udev_device_get_sysfs_attr:
+ * @device: A #GUdevDevice.
+ * @name: Name of the sysfs attribute.
+ *
+ * Look up the sysfs attribute with @name on @device.
+ *
+ * Returns: The value of the sysfs attribute or %NULL if there is no
+ * such attribute. Do not free this string, it is owned by @device.
+ */
+const gchar *
+g_udev_device_get_sysfs_attr (GUdevDevice  *device,
+                              const gchar  *name)
+{
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  g_return_val_if_fail (name != NULL, NULL);
+  return udev_device_get_sysattr_value (device->priv->udevice, name);
+}
+
+/**
+ * g_udev_device_get_sysfs_attr_as_int:
+ * @device: A #GUdevDevice.
+ * @name: Name of the sysfs attribute.
+ *
+ * Look up the sysfs attribute with @name on @device and convert it to an integer
+ * using strtol().
+ *
+ * Returns: The value of the sysfs attribute or 0 if there is no such
+ * attribute.
+ */
+gint
+g_udev_device_get_sysfs_attr_as_int (GUdevDevice  *device,
+                                     const gchar  *name)
+{
+  gint result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0);
+  g_return_val_if_fail (name != NULL, 0);
+
+  result = 0;
+  s = g_udev_device_get_sysfs_attr (device, name);
+  if (s == NULL)
+    goto out;
+
+  result = strtol (s, NULL, 0);
+out:
+  return result;
+}
+
+/**
+ * g_udev_device_get_sysfs_attr_as_uint64:
+ * @device: A #GUdevDevice.
+ * @name: Name of the sysfs attribute.
+ *
+ * Look up the sysfs attribute with @name on @device and convert it to an unsigned
+ * 64-bit integer using strtoll().
+ *
+ * Returns: The value of the sysfs attribute or 0 if there is no such
+ * attribute.
+ */
+guint64
+g_udev_device_get_sysfs_attr_as_uint64 (GUdevDevice  *device,
+                                        const gchar  *name)
+{
+  guint64 result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0);
+  g_return_val_if_fail (name != NULL, 0);
+
+  result = 0;
+  s = g_udev_device_get_sysfs_attr (device, name);
+  if (s == NULL)
+    goto out;
+
+  result = strtoll (s, NULL, 0);
+out:
+  return result;
+}
+
+/**
+ * g_udev_device_get_sysfs_attr_as_double:
+ * @device: A #GUdevDevice.
+ * @name: Name of the sysfs attribute.
+ *
+ * Look up the sysfs attribute with @name on @device and convert it to a double
+ * precision floating point number using strtod().
+ *
+ * Returns: The value of the sysfs attribute or 0.0 if there is no such
+ * attribute.
+ */
+gdouble
+g_udev_device_get_sysfs_attr_as_double (GUdevDevice  *device,
+                                        const gchar  *name)
+{
+  gdouble result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), 0.0);
+  g_return_val_if_fail (name != NULL, 0.0);
+
+  result = 0.0;
+  s = g_udev_device_get_sysfs_attr (device, name);
+  if (s == NULL)
+    goto out;
+
+  result = strtod (s, NULL);
+out:
+  return result;
+}
+
+/**
+ * g_udev_device_get_sysfs_attr_as_boolean:
+ * @device: A #GUdevDevice.
+ * @name: Name of the sysfs attribute.
+ *
+ * Look up the sysfs attribute with @name on @device and convert it to an
+ * boolean. This is done by doing a case-insensitive string comparison
+ * on the string value against "1" and "true".
+ *
+ * Returns: The value of the sysfs attribute or %FALSE if there is no such
+ * attribute.
+ */
+gboolean
+g_udev_device_get_sysfs_attr_as_boolean (GUdevDevice  *device,
+                                         const gchar  *name)
+{
+  gboolean result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), FALSE);
+  g_return_val_if_fail (name != NULL, FALSE);
+
+  result = FALSE;
+  s = g_udev_device_get_sysfs_attr (device, name);
+  if (s == NULL)
+    goto out;
+
+  if (strcmp (s, "1") == 0 || g_ascii_strcasecmp (s, "true") == 0)
+    result = TRUE;
+ out:
+  return result;
+}
+
+/**
+ * g_udev_device_get_sysfs_attr_as_strv:
+ * @device: A #GUdevDevice.
+ * @name: Name of the sysfs attribute.
+ *
+ * Look up the sysfs attribute with @name on @device and return the result of
+ * splitting it into non-empty tokens split at white space (only space (' '),
+ * form-feed ('\f'), newline ('\n'), carriage return ('\r'), horizontal
+ * tab ('\t'), and vertical tab ('\v') are considered; the locale is
+ * not taken into account).
+ *
+ * Returns: (transfer none) (array zero-terminated=1) (element-type utf8): The value of the sysfs attribute split into tokens or %NULL if there is no such attribute. This array is owned by @device and should not be freed by the caller.
+ */
+const gchar * const *
+g_udev_device_get_sysfs_attr_as_strv (GUdevDevice  *device,
+                                      const gchar  *name)
+{
+  gchar **result;
+  const gchar *s;
+
+  g_return_val_if_fail (G_UDEV_IS_DEVICE (device), NULL);
+  g_return_val_if_fail (name != NULL, NULL);
+
+  if (device->priv->sysfs_attr_strvs != NULL)
+    {
+      result = g_hash_table_lookup (device->priv->sysfs_attr_strvs, name);
+      if (result != NULL)
+        goto out;
+    }
+
+  result = NULL;
+  s = g_udev_device_get_sysfs_attr (device, name);
+  if (s == NULL)
+    goto out;
+
+  result = split_at_whitespace (s);
+  if (result == NULL)
+    goto out;
+
+  if (device->priv->sysfs_attr_strvs == NULL)
+    device->priv->sysfs_attr_strvs = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) g_strfreev);
+  g_hash_table_insert (device->priv->sysfs_attr_strvs, g_strdup (name), result);
+
+out:
+  return (const gchar* const *) result;
+}