Android客制化adb shell进去后显示shell@xxx的标识

: ${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

: ${TERM:=vt100} ${HOME:=/data} ${MKSH:=/system/bin/sh} ${HOSTNAME:=$(getprop ro.product.device)}
: ${SHELL:=$MKSH} ${USER:=$(typeset x=$(id); x=${x#*\\(}; print -r -- ${x%%\\)*})} ${HOSTNAME:=android}

: ${HOME:=/data}
: ${HOSTNAME:=$(getprop ro.product.device)}
: ${HOSTNAME:=android}
: ${MKSH:=/system/bin/sh}
: ${SHELL:=$MKSH}
: ${TERM:=xterm}
: ${TMPDIR:=/data/local/tmp}
: ${USER:=$(id -un)}