libbb: code shrink

function                                             old     new   delta
generate_uuid                                        124     103     -21

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/libbb/xfuncs_printf.c b/libbb/xfuncs_printf.c
index f1cf7aeed..fcc798662 100644
--- a/libbb/xfuncs_printf.c
+++ b/libbb/xfuncs_printf.c
@@ -633,14 +633,11 @@ void FAST_FUNC generate_uuid(uint8_t *buf)
         pid_t pid;
         int i;
 
-        i = open("/dev/urandom", O_RDONLY);
-        if (i >= 0) {
-                read(i, buf, 16);
-                close(i);
-        }
+        open_read_close("/dev/urandom", buf, 16);
         /* Paranoia. /dev/urandom may be missing.
          * rand() is guaranteed to generate at least [0, 2^15) range,
-         * but lowest bits in some libc are not so "random".  */
+         * but lowest bits in some libc are not so "random".
+         */
         srand(monotonic_us()); /* pulls in printf */
         pid = getpid();
         while (1) {