How to Export Dbus_Session_Bus_Address

How to export DBUS_SESSION_BUS_ADDRESS

I've finally found the answer, running the following command exports the output of dbus-launch:

export $(dbus-launch)

Shell script with export command and notify-send via crontab not working. Exported variable is set by a command

env when invoked from a script run by cron, only had the following variables set in my box.

SHELL=/bin/sh USER=clement PATH=/usr/bin:/bin PWD=/home/clement HOME=/home/clement SHLVL=2 LOGNAME=clement _=/usr/bin/env

and so grep in

$(env | grep DBUS_SESSION_BUS_ADDRESS | sed 's/DBUS_SESSION_BUS_ADDRESS=//')

didn't give any output. The following should work.

#!/bin/bash
PID=$(pgrep gnome-session)
dbus=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ|cut -d= -f2-)
export DBUS_SESSION_BUS_ADDRESS=$dbus
notify-send -u critical "Blah" "Blubb"

Python DBUS SESSION_BUS - X11 dependency

The problem is that you're running the export calls in separate shells. You need to capture the output of dbus-launch, parse the values, and use os.environ to write them to the environment:

p = subprocess.Popen('dbus-launch', shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
for var in p.stdout:
  sp = var.split('=', 1)
  print sp
  os.environ[sp[0]] = sp[1][:-1]

awk output to export variable

Solved.

export DBUS_SESSION_BUS_ADDRESS=$(dbus-daemon --session --fork --print-address | awk -F"dbus-" '{ print $2 }' | awk -F",guid=" '{print ("unix:abstract=/tmp/dbus-" $1 ",guid=" $2)}')

For future reference

How to set the enviroment variables of the session DBus when starting in an init script?

This problem can be overcome by setting the enviroment variables direct for the process:

#!/bin/sh

### BEGIN INIT INFO
# Provides:           myApp
# Required-Start:     $local_fs $syslog mountkernfs
# Required-Stop:      $local_fs $syslog mountkernfs
# Default-Start:      2 3 4 5
# Default-Stop:       0 1 6
# Short-Description:  Starts myApp
### END INIT INFO

# Source function library.
. /etc/init.d/functions

start() {
    echo Starting myApp Deamon
    if [ -e "/var/run/dbus/sessionbus.pid" ];then
                DBUS_SESSION_BUS_PID=`cat /var/run/dbus/sessionbus.pid`
    fi

    if [ -e "/var/run/dbus/sessionbus.address" ];then
                DBUS_SESSION_BUS_ADDRESS=`cat /var/run/dbus/sessionbus.address`
    fi
    # start the dbus as session bus and save the enviroment vars
    if [ -z ${DBUS_SESSION_BUS_PID+x} ];then
            echo start session dbus ...
            eval "export $(/usr/bin/dbus-launch)"
            echo "${DBUS_SESSION_BUS_PID}">/var/run/dbus/sessionbus.pid
            echo "${DBUS_SESSION_BUS_ADDRESS}">/var/run/dbus/sessionbus.address
            echo session dbus runs now at pid="${DBUS_SESSION_BUS_PID}"
    else
            echo session dbus runs at pid="${DBUS_SESSION_BUS_PID}"
    fi

    pgrep -x myApp
    if [ "$?" = "0" ]
    then
        echo myApp Deamon already running
        exit 1
    fi
    DBUS_SESSION_BUS_ADDRESS=${DBUS_SESSION_BUS_ADDRESS} myApp -d
    echo myApp started successfully
}

stop() {
    echo Stopping myApp Deamon
    kill -15 `pgrep myApp`
}

status() {
    pgrep myApp > /dev/null && echo running
    pgrep myApp > /dev/null || echo stopped
}

case "$1" in
    start)
       start
       ;;
    stop)
       stop
       ;;
    restart)
       stop
       start
       ;;
    status)
       status
       ;;
    *)
       echo "Usage: $0 {start|stop|status|restart}"

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