bash: Update default environment

* Match mksh
 * Use colored ls

Change-Id: I2ed8617d348344f2cfae6e896981ce4759fffaef

etc/bashrc

@@ -5,6 +5,12 @@
 # that can't tolerate any output.  So make sure this doesn't display
 # anything or bad things will happen !
 
+: ${HOME:=/sdcard}
+: ${HOSTNAME:=$(getprop ro.cm.device)}
+: ${TERM:=linux}
+: ${TMPDIR:=/data/local/tmp}
+: ${USER:=$(id -un)}
+export HOME HOSTNAME MKSH SHELL TERM TMPDIR USER
 
 # Test for an interactive shell.  There is no need to set anything
 # past this point for scp and rcp, and it's important to refrain from
@@ -25,10 +31,6 @@ shopt -s histappend
 
 use_color=false
 
-# set some environment variables
-export HOME=/sdcard
-export TERM=xterm
-
 # enable colorful terminal
 if [[ ${EUID} == 0 ]] ; then
 	PS1='\[\033[01;31m\]\h\[\033[01;34m\] \W \$\[\033[00m\] '
@@ -36,6 +38,9 @@ else
 	PS1='\[\033[01;32m\]\u@\h\[\033[01;34m\] \w \$\[\033[00m\] '
 fi
 
+alias ls='ls --color=auto'
+alias ps='/system/xbin/ps'
+
 # Try to keep environment pollution down, EPA loves us.
 unset use_color safe_term match_lhs