blkid: new applet. We almost had everything needed for it already

function                                             old     new   delta
display_uuid_cache                                     -      89     +89
blkid_main                                             -       8      +8
applet_names                                        1871    1877      +6
applet_main                                         1140    1144      +4
applet_nameofs                                       570     572      +2
packed_usage                                       24737   24735      -2
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/1 up/down: 109/-2)            Total: 107 bytes

2 files changed, 10 insertions, 8 deletions

diff --git a/util-linux/volume_id/Kbuild b/util-linux/volume_id/Kbuild
index 54b95f0c7..d78e4ada5 100644
--- a/util-linux/volume_id/Kbuild
+++ b/util-linux/volume_id/Kbuild
@@ -6,6 +6,7 @@
 
 lib-y:=
 
+lib-$(CONFIG_BLKID)                             += get_devname.o
 lib-$(CONFIG_FINDFS)                            += get_devname.o
 lib-$(CONFIG_FEATURE_MOUNT_LABEL)               += get_devname.o
 
diff --git a/util-linux/volume_id/get_devname.c b/util-linux/volume_id/get_devname.c
index f9a2c905f..83c085650 100644
--- a/util-linux/volume_id/get_devname.c
+++ b/util-linux/volume_id/get_devname.c
@@ -374,24 +374,25 @@ get_spec_by_volume_label(const char *s, int *major, int *minor)
 {
         return get_spec_by_x(VOL, s, major, minor);
 }
+#endif // UNUSED
 
-static int display_uuid_cache(void)
+/* Used by blkid */
+void display_uuid_cache(void)
 {
         struct uuidCache_s *u;
-        size_t i;
 
         uuidcache_init();
-
         u = uuidCache;
         while (u) {
-                printf("%s %s %s\n", u->device, u->label, u->uc_uuid);
+                printf("%s:", u->device);
+                if (u->label[0])
+                        printf(" LABEL=\"%s\"", u->label);
+                if (u->uc_uuid[0])
+                        printf(" UUID=\"%s\"", u->uc_uuid);
+                bb_putchar('\n');
                 u = u->next;
         }
-
-        return 0;
 }
-#endif // UNUSED
-
 
 /* Used by mount and findfs */