C++ (Cpp) udev_device_new_from_fd Beispiele

Beispiel #1

Datei: loader.c Projekt: Sonicadvance1/mesa

char *
loader_get_device_name_for_fd(int fd)
{
   char *device_name = NULL;
#ifdef HAVE_LIBUDEV
   struct udev *udev;
   struct udev_device *device;
   const char *const_device_name;
   UDEV_SYMBOL(struct udev *, udev_new, (void));
   UDEV_SYMBOL(const char *, udev_device_get_devnode,
               (struct udev_device *));
   UDEV_SYMBOL(struct udev_device *, udev_device_unref,
               (struct udev_device *));
   UDEV_SYMBOL(struct udev *, udev_unref, (struct udev *));

   udev = udev_new();
   device = udev_device_new_from_fd(udev, fd);
   if (device == NULL)
      return NULL;

   const_device_name = udev_device_get_devnode(device);
   if (!const_device_name)
      goto out;
   device_name = strdup(const_device_name);

out:
   udev_device_unref(device);
   udev_unref(udev);
#endif
   return device_name;
}

Beispiel #2

Datei: loader.c Projekt: ashmew2/kolibriosSVN

static int
libudev_get_pci_id_for_fd(int fd, int *vendor_id, int *chip_id)
{
   struct udev *udev = NULL;
   struct udev_device *device = NULL, *parent;
   const char *pci_id;
   UDEV_SYMBOL(struct udev *, udev_new, (void));
   UDEV_SYMBOL(struct udev_device *, udev_device_get_parent,
               (struct udev_device *));
   UDEV_SYMBOL(const char *, udev_device_get_property_value,
               (struct udev_device *, const char *));
   UDEV_SYMBOL(struct udev_device *, udev_device_unref,
               (struct udev_device *));
   UDEV_SYMBOL(struct udev *, udev_unref, (struct udev *));

   *chip_id = -1;

   if (dlsym_failed)
      return 0;

   udev = udev_new();
   device = udev_device_new_from_fd(udev, fd);
   if (!device)
      goto out;

   parent = udev_device_get_parent(device);
   if (parent == NULL) {
      log_(_LOADER_WARNING, "MESA-LOADER: could not get parent device\n");
      goto out;
   }

   pci_id = udev_device_get_property_value(parent, "PCI_ID");
   if (pci_id == NULL) {
      log_(_LOADER_INFO, "MESA-LOADER: no PCI ID\n");
      *chip_id = -1;
      goto out;
   } else if (sscanf(pci_id, "%x:%x", vendor_id, chip_id) != 2) {
      log_(_LOADER_WARNING, "MESA-LOADER: malformed PCI ID\n");
      *chip_id = -1;
      goto out;
   }

out:
   if (device)
      udev_device_unref(device);
   if (udev)
      udev_unref(udev);

   return (*chip_id >= 0);
}