libblkid: remove dependence on libuuid

Currently we use libuuid to print UUID only. This code is possible to replace
by one snprintf(). It seems better to duplicate this one snprintf than force
all distros to keep libuuid together with libblkid.

Note, this scenario has been already supported on --disable-libuuid.

Reported-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Karel Zak <kzak@redhat.com>

libblkid/blkid.pc.in

@@ -6,6 +6,5 @@ includedir=@includedir@
 Name: blkid
 Description: Block device id library
 Version: @LIBBLKID_VERSION@
-Requires.private: uuid
 Cflags: -I${includedir}/blkid
 Libs: -L${libdir} -lblkid

libblkid/src/Makemodule.am

@@ -126,11 +126,6 @@ libblkid_la_CFLAGS = \
 	-I$(ul_libblkid_incdir) \
 	-I$(top_srcdir)/libblkid/src
 
-if BUILD_LIBUUID
-libblkid_la_LIBADD += libuuid.la
-libblkid_la_CFLAGS += -I$(ul_libuuid_incdir)
-endif
-
 libblkid_la_LDFLAGS = $(SOLIB_LDFLAGS)
 if HAVE_VSCRIPT
 libblkid_la_LDFLAGS += $(VSCRIPT_LDFLAGS),$(top_srcdir)/libblkid/src/libblkid.sym
@@ -157,12 +152,6 @@ check_PROGRAMS += \
 blkid_tests_cflags  = -DTEST_PROGRAM $(libblkid_la_CFLAGS)
 blkid_tests_ldflags =
 blkid_tests_ldadd   = libblkid.la
-
-if BUILD_LIBUUID
-blkid_tests_ldflags += libuuid.la
-blkid_tests_ldadd   += $(LDADD)
-endif
-
 blkid_tests_ldflags += -static
 
 test_blkid_cache_SOURCES = libblkid/src/cache.c

libblkid/src/blkidP.h

@@ -23,9 +23,7 @@
 #include <stdarg.h>
 #include <stdint.h>
 
-#ifdef HAVE_LIBUUID
-# include <uuid.h>
-#else
+#ifndef UUID_STR_LEN
 # define UUID_STR_LEN   37
 #endif
 

libblkid/src/probe.c

@@ -1886,13 +1886,6 @@ struct blkid_prval *__blkid_probe_lookup_value(blkid_probe pr, const char *name)
 
 /* converts DCE UUID (uuid[16]) to human readable string
  * - the @len should be always 37 */
-#ifdef HAVE_LIBUUID
-void blkid_unparse_uuid(const unsigned char *uuid, char *str,
-			size_t len __attribute__((__unused__)))
-{
-	uuid_unparse(uuid, str);
-}
-#else
 void blkid_unparse_uuid(const unsigned char *uuid, char *str, size_t len)
 {
 	snprintf(str, len,
@@ -1903,7 +1896,6 @@ void blkid_unparse_uuid(const unsigned char *uuid, char *str, size_t len)
 		uuid[8], uuid[9],
 		uuid[10], uuid[11], uuid[12], uuid[13], uuid[14],uuid[15]);
 }
-#endif
 
 /* like uuid_is_null() from libuuid, but works with arbitrary size of UUID */
 int blkid_uuid_is_empty(const unsigned char *buf, size_t len)