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#!/bin/bash
#
# Run a command as the currently active X11 user
#
# source: https://github.com/rephorm/xuserrun
seat="seat0"
# determine location of loginctl
LOGINCTL=$(command -v loginctl || command -v systemd-loginctl)
if [[ -e LOGINCTL ]]; then
echo "Error: Unable to find loginctl executable"
exit 1
fi
get_session_info() {
local session="$1"
local varname="$2"
local IFS=$'\n'
eval declare -Ag $varname
for row in $(loginctl show-session "$session"); do
key="$(echo "${row}"|cut -d= -f1)"
val="$(echo "${row}"|cut -d= -f2-)"
eval ${varname}[\"${key}\"]=\"${val}\"
done
}
escape() {
for arg in "$@" ; do
printf "%q " "$arg";
done;
}
active_session="$(loginctl show-seat ${seat}|grep ActiveSession|cut -d= -f2)"
if [[ $? -ne 0 || -z $active_session ]]; then
echo "Error: Unable to determine active session"
exit 1
fi
get_session_info $active_session session_info
if [[ ${session_info[Type]} != "x11" ]]; then
echo "Error: Active session is not x11"
exit 2
fi
current_user="$(id -u -n)"
if [[ ${current_user} == ${session_info[Name]} ]]; then
# already correct user, no need to su
DISPLAY="${session_info[Display]}" "$@"
else
# run command as user
DISPLAY="${session_info[Display]}" su -c - "${session_info[Name]}" "$(escape "$@")"
fi
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