ash: add FEATURE_SH_NOFORK support

1 files changed, 17 insertions, 0 deletions

diff --git a/shell/Config.in b/shell/Config.in
index 40e0217f4..94ffa09f8 100644
--- a/shell/Config.in
+++ b/shell/Config.in
@@ -287,6 +287,23 @@ config FEATURE_SH_STANDALONE
 #         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