*: introduce and use xvfork()

function                                             old     new   delta
time_main                                           1052    1285    +233
crontab_main                                         623     856    +233
ifupdown_main                                       2202    2403    +201
xvfork                                                 -      20     +20
passwd_main                                         1049    1053      +4
grave                                               1068    1066      -2
script_main                                          935     921     -14
vfork_or_die                                          20       -     -20
vfork_compressor                                     206     175     -31
open_as_user                                         109       -    -109
popen2                                               218       -    -218
edit_file                                            910     690    -220
run_command                                          268       -    -268
------------------------------------------------------------------------------
(add/remove: 1/4 grow/shrink: 4/4 up/down: 691/-882)         Total: -191 bytes

1 files changed, 1 insertions, 4 deletions

diff --git a/util-linux/script.c b/util-linux/script.c
index e70294e6c..a6c1ab88a 100644
--- a/util-linux/script.c
+++ b/util-linux/script.c
@@ -87,10 +87,7 @@ int script_main(int argc ATTRIBUTE_UNUSED, char **argv)
 
         /* TODO: SIGWINCH? pass window size changes down to slave? */
 
-        child_pid = vfork();
-        if (child_pid < 0) {
-                bb_perror_msg_and_die("vfork");
-        }
+        child_pid = xvfork();
 
         if (child_pid) {
                 /* parent */