Sandbox::https://github.com/aspiers/shell-env/blob/master/bin/xauth-user

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#!/bin/sh

set -e

if [ $# = 0 ] || [ "$1" = '-h' ] || [ "$1" = '--help' ]; then

echo "Usage: $0 <user1 to authorise> [ <user2> ... ]"

exit 0

if [ -z "$DISPLAY" ]; then

echo "\$DISPLAY not set; aborting." >&2

exit 1

# Not sure what to do here. Sometimes we get two results:

# one for MIT-MAGIC-COOKIE-1 and one for XDM-AUTHORIZATION-1.

# In that case, XDM-AUTHORIZATION-1 seems to be the right one

# (presumably because xdm/gdm/kdm was used to login).

cookie="`xauth list $DISPLAY | tail -n 1`"

if [ -z "$cookie" ]; then

echo "xauth list $DISPLAY failed to return a cookie" >&2

exit 1

for user in "$@"; do

echo "Adding '$cookie' for user $user"

su -c "set -x; unset XAUTHORITY; xauth add $cookie" "$user"

done