libbb: code shrink: introduce and use [_]exit_SUCCESS()

function                                             old     new   delta
exit_SUCCESS                                           -       7      +7
_exit_SUCCESS                                          -       7      +7
run_pipe                                            1562    1567      +5
pseudo_exec_argv                                     399     400      +1
finish                                                86      87      +1
start_stop_daemon_main                              1109    1107      -2
shutdown_on_signal                                    38      36      -2
runsv_main                                          1662    1660      -2
redirect                                            1070    1068      -2
read_line                                             79      77      -2
pause_and_low_level_reboot                            54      52      -2
list_i2c_busses_and_exit                             483     481      -2
less_exit                                             12      10      -2
identify                                            4123    4121      -2
grep_file                                           1161    1159      -2
getty_main                                          1519    1517      -2
fsck_minix_main                                     2681    2679      -2
free_session                                         132     130      -2
fdisk_main                                          4739    4737      -2
clean_up_and_exit                                     53      51      -2
bsd_select                                          1566    1564      -2
bb_daemonize_or_rexec                                198     196      -2
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/17 up/down: 21/-34)           Total: -13 bytes

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

2 files changed, 3 insertions, 3 deletions

diff --git a/shell/ash.c b/shell/ash.c
index 827643808..4a8ec0c03 100644
--- a/shell/ash.c
+++ b/shell/ash.c
@@ -5505,7 +5505,7 @@ openhere(union node *redir)
                 ignoresig(SIGTSTP); //signal(SIGTSTP, SIG_IGN);
                 signal(SIGPIPE, SIG_DFL);
                 xwrite(pip[1], p, len);
-                _exit(EXIT_SUCCESS);
+                _exit_SUCCESS();
         }
  out:
         close(pip[1]);
diff --git a/shell/hush.c b/shell/hush.c
index 6a27b1634..982fc356a 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -8587,7 +8587,7 @@ static NOINLINE void pseudo_exec_argv(nommu_save_t *nommu_save,
                  * expand_assignments(): think about ... | var=`sleep 1` | ...
                  */
                 free_strings(new_env);
-                _exit(EXIT_SUCCESS);
+                _exit_SUCCESS();
         }
 
         sv_shadowed = G.shadowed_vars_pp;
@@ -8768,7 +8768,7 @@ static void pseudo_exec(nommu_save_t *nommu_save,
 
         /* Case when we are here: ... | >file */
         debug_printf_exec("pseudo_exec'ed null command\n");
-        _exit(EXIT_SUCCESS);
+        _exit_SUCCESS();
 }
 
 #if ENABLE_HUSH_JOB