1 files changed, 9 insertions, 6 deletions

diff --git a/init/Config.in b/init/Config.in
index 4c5610246..f525abc8a 100644
--- a/init/Config.in
+++ b/init/Config.in
@@ -47,15 +47,18 @@ config FEATURE_KILL_DELAY
           wrong process!)
 
 config FEATURE_INIT_SCTTY
-        bool "Support running commands with a controlling-tty"
+        bool "Run commands with leading dash with controlling tty"
         default n
         depends on INIT
         help
-          If this option is enabled a command starting with hyphen (-)
-          is run in its own session (setsid(2)) and possibly with a
-          controlling tty (TIOCSCTTY).  This is not the traditional init
-          behavour, but is often what you want in an embedded system where
-          the console is only accessed during development or for maintenance.
+          If this option is enabled, init will try to give a controlling
+          tty to any command which has leading hyphen (often it's "-/bin/sh").
+          More precisely, init will do "ioctl(STDIN_FILENO, TIOCSCTTY, 0)".
+          If device attached to STDIN_FILENO can be a ctty but is not yet
+          a ctty for other session, it will become this process' ctty.
+          This is not the traditional init behavour, but is often what you want
+          in an embedded system where the console is only accessed during
+          development or for maintenance.
           NB: using cttyhack applet may work better.
 
 config FEATURE_INIT_SYSLOG