ash: add FEATURE_SH_NOFORK support
diff --git a/shell/Config.in b/shell/Config.in
index 40e0217..94ffa09 100644
--- a/shell/Config.in
+++ b/shell/Config.in
@@ -287,6 +287,23 @@
# that exact location with that exact name, this option will not work at
# all.
+config FEATURE_SH_NOFORK
+ bool "Run 'nofork' applets directly"
+ default n
+ depends on (MSH || LASH || HUSH || ASH) && FEATURE_PREFER_APPLETS
+ help
+ This option causes busybox shells [currently only ash]
+ to not execute typical fork/exec/wait sequence, but call <applet>_main
+ directly, if possible. (Sometimes it is not possible: for example,
+ this is not possible in pipes).
+
+ This will be done only for some applets (those which are marked
+ NOFORK in include/applets.h).
+
+ This may significantly speed up some shell scripts.
+
+ This feature is relatively new. Use with care.
+
config CTTYHACK
bool "cttyhack"
default n