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

3 files changed, 7 insertions, 0 deletions

diff --git a/include/applets.h b/include/applets.h
index 35649d3df..828900e46 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -80,6 +80,7 @@ USE_AWK(APPLET_NOEXEC(awk, awk, _BB_DIR_USR_BIN, _BB_SUID_NEVER, awk))
 USE_BASENAME(APPLET_NOFORK(basename, basename, _BB_DIR_USR_BIN, _BB_SUID_NEVER, basename))
 USE_BBCONFIG(APPLET(bbconfig, _BB_DIR_BIN, _BB_SUID_NEVER))
 //USE_BBSH(APPLET(bbsh, _BB_DIR_BIN, _BB_SUID_NEVER))
+USE_BLKID(APPLET(blkid, _BB_DIR_SBIN, _BB_SUID_NEVER))
 USE_BRCTL(APPLET(brctl, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_BUNZIP2(APPLET(bunzip2, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_BUNZIP2(APPLET_ODDNAME(bzcat, bunzip2, _BB_DIR_USR_BIN, _BB_SUID_NEVER, bzcat))
diff --git a/include/usage.h b/include/usage.h
index d2478641c..3c110132e 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1098,6 +1098,11 @@
      "\n        -z              Delete messages on server" \
      "\n        prog            Run 'prog <message_file>' on message delivery" \
 
+#define blkid_trivial_usage \
+       ""
+#define blkid_full_usage "\n\n" \
+       "Print UUIDs of all filesystems."
+
 #define findfs_trivial_usage \
        "LABEL=label or UUID=uuid"
 #define findfs_full_usage "\n\n" \
diff --git a/include/volume_id.h b/include/volume_id.h
index 99cb11ff6..bba32c0ba 100644
--- a/include/volume_id.h
+++ b/include/volume_id.h
@@ -20,3 +20,4 @@
 
 char *get_devname_from_label(const char *spec);
 char *get_devname_from_uuid(const char *spec);
+void display_uuid_cache(void);