From 511d60900a5826f2d1ca9bdc3937aab860fb3e9f Mon Sep 17 00:00:00 2001
From: Mike Kasick <mike@kasick.org>
Date: Thu, 26 Jan 2012 17:54:31 -0500
Subject: [PATCH] Don't export PS1 in /system/etc/mkshrc.

At present, when running a busybox shell ("busybox sh") from mksh
(/system/bin/sh), one gets the following message before every command line:

sh: precmd: Permission denied

This is due to mkshrc exporting a PS1 which depends on a mkshrc defined
function, "precmd".  Since "busybox sh" does not source mkshrc, it does not
have this function defined, resulting in the above error.

By not exporting PS1, "busybox sh" uses its own reasonable default.  mksh
subshells continue to work as usual, since they (re)source /etc/mkshrc
anyways.

Change-Id: Ic9182e42aa033e811300d9e6e8d6d3f43e14e58f
---
 config/common.mk           |  4 ++++
 prebuilt/common/etc/mkshrc | 29 +++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 prebuilt/common/etc/mkshrc

diff --git a/config/common.mk b/config/common.mk
index 0833b9a3..1d91d6cf 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -54,6 +54,10 @@ PRODUCT_COPY_FILES +=  \
 PRODUCT_COPY_FILES += \
     frameworks/base/data/etc/android.software.sip.voip.xml:system/etc/permissions/android.software.sip.voip.xml
 
+# Don't export PS1 in /system/etc/mkshrc.
+PRODUCT_COPY_FILES += \
+    vendor/cm/prebuilt/common/etc/mkshrc:system/etc/mkshrc
+
 # Required CM packages
 PRODUCT_PACKAGES += \
     Camera \
diff --git a/prebuilt/common/etc/mkshrc b/prebuilt/common/etc/mkshrc
new file mode 100644
index 00000000..e2a55d37
--- /dev/null
+++ b/prebuilt/common/etc/mkshrc
@@ -0,0 +1,29 @@
+# Copyright (c) 2010
+#	Thorsten Glaser <t.glaser@tarent.de>
+# This file is provided under the same terms as mksh.
+#-
+# Minimal /system/etc/mkshrc for Android
+
+: ${TERM:=vt100} ${HOME:=/data} ${MKSH:=/system/bin/sh} ${HOSTNAME:=android}
+: ${SHELL:=$MKSH} ${USER:=$(typeset x=$(id); x=${x#*\(}; print -r -- ${x%%\)*})}
+if (( USER_ID )); then PS1='$'; else PS1='#'; fi
+function precmd {
+	typeset e=$?
+
+	(( e )) && print -n "$e|"
+}
+PS1='$(precmd)$USER@$HOSTNAME:${PWD:-?} '"$PS1 "
+export HOME HOSTNAME MKSH SHELL TERM USER
+alias l='ls'
+alias la='l -a'
+alias ll='l -l'
+alias lo='l -a -l'
+
+for p in ~/.bin; do
+	[[ -d $p/. ]] || continue
+	[[ :$PATH: = *:$p:* ]] || PATH=$p:$PATH
+done
+
+unset p
+
+: place customisations above this line