Re: [PATCH 4/7] efi: add helper to get the GPT partition UUID for a device

[Marc Kleine-Budde <mkl@pengutronix.de>]

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On 07/16/2015 10:43 AM, Michael Olbrich wrote:
> Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
> ---
>  common/efi-devicepath.c | 31 +++++++++++++++++++++++++++++++
>  include/efi.h           |  1 +
>  2 files changed, 32 insertions(+)
> 
> diff --git a/common/efi-devicepath.c b/common/efi-devicepath.c
> index a53c6d2e8b9b..fdb86afc8eca 100644
> --- a/common/efi-devicepath.c
> +++ b/common/efi-devicepath.c
> @@ -1383,3 +1383,34 @@ u8 device_path_to_type(struct efi_device_path *dev_path)
>  
>  	return device_path_type(dev_path);
>  }
> +
> +char *device_path_to_partuuid(struct efi_device_path *dev_path)
> +{
> +	struct efi_device_path *dev_path_node;
> +	struct harddrive_device_path *hd;
> +	char *str = NULL;;
> +
> +	dev_path = unpack_device_path(dev_path);
> +
> +	for (dev_path_node = dev_path; !is_device_path_end(dev_path_node);
> +	     dev_path_node = next_device_path_node(dev_path_node)) {
> +
> +		if (device_path_type(dev_path_node) != MEDIA_DEVICE_PATH)
> +			continue;
> +
> +		if (dev_path_node->sub_type != MEDIA_HARDDRIVE_DP)
> +			continue;
> +
> +		hd = (struct harddrive_device_path *)dev_path_node;
> +
> +		if (hd->signature_type != SIGNATURE_TYPE_GUID)
> +			continue;
> +
> +		str = malloc(sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")+1);
> +		sprintf(str, "%pU)", (efi_guid_t *)&(hd->signature[0]));
> +		break;
asprintf()?

Marc
-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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