cttyhack: new applet.

1 files changed, 20 insertions, 0 deletions

diff --git a/shell/Config.in b/shell/Config.in
index 027993483..253752bc3 100644
--- a/shell/Config.in
+++ b/shell/Config.in
@@ -270,4 +270,24 @@ config FEATURE_SH_STANDALONE
 #         that exact location with that exact name, this option will not work at
 #         all.
 
+config CTTYHACK
+        bool "cttyhack"
+        default n
+        help
+          One common problem reported on the mailing list is "can't access tty;
+          job control turned off" error message which typically appears when
+          one tries to use shell with stdin/stdout opened to /dev/console.
+          This device is special - it cannot be a controlling tty.
+
+          Proper solution is to use correct device instead of /dev/console.
+
+          cttyhack provides "quick and dirty" solution to this problem.
+          It analyzes stdin with various ioctls, trying to determine whether
+          it is a /dev/ttyN or /dev/ttySN (virtual terminal or serial line).
+          If it detects one, it closes stdin/out/err and reopens that device.
+          Then it executes given program. Usage example for /etc/inittab
+          (for busybox init):
+
+          ::respawn:/bin/cttyhack /bin/sh
+
 endmenu