On Tue, 18.03.14 20:29, Umut Tezduyar Lindskog (umut.tezdu...@axis.com) wrote:
> +int net_get_unique_predictable_data(struct udev_device *device, uint64_t
> *result) {
> + size_t l, sz = 0;
> + const char *name;
> + int r;
> + uint8_t *v;
> +
> + /* fetch some persistent data unique (on this machine) to this
> device */
> + name = udev_device_get_property_value(device, "ID_NET_NAME_ONBOARD");
> + if (!name) {
> + name = udev_device_get_property_value(device,
> "ID_NET_NAME_SLOT");
> + if (!name) {
> + name = udev_device_get_property_value(device,
> "ID_NET_NAME_PATH");
> + if (!name) {
> + name =
> udev_device_get_property_value(device, "ID_NET_NAME_MAC");
> + if (!name)
> + return -ENOENT;
> + }
> + }
> + }
To make this a bit nicer I have now added code a new FOREACH_STRING()
macro, working like this:
const char *field, *name = NULL;
FOREACH_STRING(field, "ID_NET_NAME_ONBOARD", "ID_NET_NAME_SLOT",
"ID_NET_NAME_PATH", "ID_NET_NAME_MAC") {
name = udev_device_get_property_value(device, field);
if (name)
break;
}
if (!name)
return -ENOENT;
Lennart
--
Lennart Poettering, Red Hat
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