C++ (Cpp) volume_id_open_nodeの例

コード例 #1

ファイル: get_devname.c プロジェクト: eckyecky/rt-n56u

/* Returns !0 on error.
 * Otherwise, returns malloc'ed strings for label and uuid
 * (and they can't be NULL, although they can be "").
 * NB: closes fd. */
static int
get_label_uuid(int fd, char **label, char **uuid, const char **type)
{
	int rv = 1;
	uint64_t size;
	struct volume_id *vid;

	/* fd is owned by vid now */
	vid = volume_id_open_node(fd);

	if (ioctl(/*vid->*/fd, BLKGETSIZE64, &size) != 0)
		size = 0;

	if (volume_id_probe_all(vid, /*0,*/ size) != 0)
		goto ret;

	if (vid->label[0] != '\0' || vid->uuid[0] != '\0') {
		*label = xstrndup(vid->label, sizeof(vid->label));
		*uuid  = xstrndup(vid->uuid, sizeof(vid->uuid));
#if ENABLE_FEATURE_BLKID_TYPE
		*type = vid->type;
		dbg("found label '%s', uuid '%s', type '%s'", *label, *uuid, *type);
#else
		dbg("found label '%s', uuid '%s'", *label, *uuid);
#endif
		rv = 0;
	}
 ret:
	free_volume_id(vid); /* also closes fd */
	return rv;
}

コード例 #2

ファイル: get_devname.c プロジェクト: appleorange1/asus-rt-n12-lx

/* Returns !0 on error.
 * Otherwise, returns malloc'ed strings for label and uuid
 * (and they can't be NULL, although they can be "").
 * NB: closes fd. */
static int
get_label_uuid(int fd, char **label, char **uuid)
{
	int rv = 1;
	uint64_t size;
	struct volume_id *vid;

	/* fd is owned by vid now */
	vid = volume_id_open_node(fd);

	if (ioctl(/*vid->*/fd, BLKGETSIZE64, &size) != 0)
		size = 0;

	if (volume_id_probe_all(vid, 0, size) != 0)
		goto ret;

	if (vid->label[0] != '\0' || vid->uuid[0] != '\0') {
		*label = xstrndup(vid->label, sizeof(vid->label));
		*uuid  = xstrndup(vid->uuid, sizeof(vid->uuid));
		dbg("found label '%s', uuid '%s' on %s", *label, *uuid, device);
		rv = 0;
	}
 ret:
	free_volume_id(vid); /* also closes fd */
	return rv;
}

コード例 #3

ファイル: volume_id.c プロジェクト: AospPlus/android_external_busybox

/* open volume by major/minor */
struct volume_id* FAST_FUNC volume_id_open_dev_t(dev_t devt)
{
	struct volume_id *id;
	char *tmp_node[VOLUME_ID_PATH_MAX];

	tmp_node = xasprintf("/dev/.volume_id-%u-%u-%u",
		(unsigned)getpid(), (unsigned)major(devt), (unsigned)minor(devt));

	/* create temporary node to open block device */
	unlink(tmp_node);
	if (mknod(tmp_node, (S_IFBLK | 0600), devt) != 0)
		bb_perror_msg_and_die("can't mknod(%s)", tmp_node);

	id = volume_id_open_node(tmp_node);
	unlink(tmp_node);
	free(tmp_node);
	return id;
}

コード例 #4

ファイル: get_devname.c プロジェクト: NikhilNJ/screenplay-dx

static int
get_label_uuid(const char *device, char **label, char **uuid, int iso_only)
{
	int rv = 1;
	uint64_t size;
	struct volume_id *vid;

	vid = volume_id_open_node(device);
	if (!vid)
		return rv;

	if (ioctl(vid->fd, BLKGETSIZE64, &size) != 0)
		size = 0;

#if ENABLE_FEATURE_VOLUMEID_ISO9660
	if ((iso_only ?
	     volume_id_probe_iso9660(vid, 0) :
	     volume_id_probe_all(vid, 0, size)
	    ) != 0
	) {
		goto ret;
	}
#else
	if (volume_id_probe_all(vid, 0, size) != 0) {
		goto ret;
	}
#endif

	if (vid->label[0] != '\0' || vid->uuid[0] != '\0') {
		*label = xstrndup(vid->label, sizeof(vid->label));
		*uuid  = xstrndup(vid->uuid, sizeof(vid->uuid));
		dbg("found label '%s', uuid '%s' on %s", *label, *uuid, device);
		rv = 0;
	}
 ret:
	free_volume_id(vid);
	return rv;
}