作者：yongjian
虽然现在多用sudo来执行root权限,但有时在某些情况下还是会用到su, 特别是在远程没有sudo配置的环境。这样，在转换到另外一个用户后(多数是root), X authentication的信息就丢失了。自己写了一个脚本可以使到su到另外一个用户后仍能保持X权限， 运行X apps.
代码:
#!/bin/sh
#
# -------------------------------------------------------------------------
# Script Name: sussh
# Author: yongjian Xu - i3dmaster
# Updated: 04/25/2005
#
# Description:
# Allows one to su to another user within a SSH session and still be
# able to launch X11 apps.
# -------------------------------------------------------------------------
# Check to see if a user id was supplied on the command line
case $# in
1) uid="$1" ;;
*) echo "Usage: $0 <username>"
exit 1 ;;
esac
# Check if $DISPLAY is set
if [[ $DISPLAY = "" ]]; then
echo "The DISPLAY environment variable must be defined."
echo "You may need to turn on X11 forwarding in your SSH client."
exit 1
fi
if [[ $(echo $DISPLAY | grep "localhost") != "" ]]; then
DISPORT=$(echo $DISPLAY | awk -F: '{print $2}'| awk -F. '{print $1}')
NEWDISPORT="$(uname -n)/unix:$DISPORT"
else
NEWDISPORT=$DISPLAY
fi
XAUTH="/usr/bin/X11/xauth" # Set the location of xauth
ARG=$($XAUTH list $NEWDISPORT) # Get the X11 magic cookie
su - $uid -c
"$XAUTH add $ARG; \
DISPLAY=$DISPLAY; \
SSH_TTY=$SSH_TTY; \
SSH_CLIENT='$SSH_CLIENT'; \
export DISPLAY SSH_TTY SSH_CLIENT; \
$SHELL"
exit 0 |