Automatic user application startup during sensor power-up

[robinbansal08]

I am trying to start my application during sensor boot process, I have referred to the already mentioned guidelines https://github.com/ifm/libo3d3xx/issues/98#issuecomment-308237758. But still I am unable to add my application to boot process.

I have written the init script startupTest.sh and kept in the location `/opt/oem/etc/init.d/` and my application binary file _cmdControlCam in the location `/opt/oem/usr/bin`. After a reboot still my application cmdControl_Cam didn't start. I have noticed that startupTest.sh can be run successfully by using command `bash startupTest.sh start`. Can you please provide any suggestions @graugans.

### BEGIN INIT INFO
# Provides: startupTest
# Required-Start: 
# Required-Stop: 
# Default-Start:  2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start cmd server
# Description: start cmd server
### END INIT INFO

case "$1" in
  start)
    cd ../../usr/bin/
    ./cmdControl_Cam &
    ;;
  stop)
    ;;
  *)
    exit 1
    ;;
esac

exit 0

[graugans]

Most probably it is a difference between the login-shell (ssh) and no-login shell. Maybe you need to specify more environment variables. One thing you might not see your application running is the fact it crashed due to some libs or other stuff is missing.

To veryfiy that the script runs one could simply touch a file

touch /tmp/cmdControl_Cam.seen

[graugans]

May I recommend to change your script like this:

### BEGIN INIT INFO
# Provides: startupTest
# Required-Start: 
# Required-Stop: 
# Default-Start:  2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start cmd server
# Description: start cmd server
### END INIT INFO
PIDFILE=/opt/oem/var/run/$NAME.pid
DAEMON=/opt/oem/usr/bin/cmdControl_Cam
DAEMON_OPTS=""

export O3D3XX_IP=127.0.0.1

case "$1" in
  start)
    mkdir -p /opt/oem/var/run
    touch /tmp/cmdControl_Cam.seen
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- $DAEMON_OPTS
    ;;
  stop)
   start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
    ;;
  *)
    exit 1
    ;;
esac

exit 0

By using ./cmdControl_Cam & you fork into the background, but the calling shell is terminated which also typically terminates its childs.

[robinbansal08]

May I recommend to change your script like this:

### BEGIN INIT INFO
# Provides: startupTest
# Required-Start: 
# Required-Stop: 
# Default-Start:  2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: start cmd server
# Description: start cmd server
### END INIT INFO
PIDFILE=/opt/oem/var/run/$NAME.pid
DAEMON=/opt/oem/usr/bin/cmdControl_Cam
DAEMON_OPTS=""

export O3D3XX_IP=127.0.0.1

case "$1" in
  start)
    mkdir -p /opt/oem/var/run
    touch /tmp/cmdControl_Cam.seen
    start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- $DAEMON_OPTS
    ;;
  stop)
   start-stop-daemon --stop --quiet --oknodo --pidfile $PIDFILE
    ;;
  *)
    exit 1
    ;;
esac

exit 0

By using ./cmdControl_Cam & you fork into the background, but the calling shell is terminated which also typically terminates its childs.

I have tried the suggested init script, but still it doesn't start my application during bootup process.

[graugans]

Are you able to start the script manually, I just wrote it from top of my head, is the file /tmp/cmdControl_Cam.seen generated? In case your application is writing anything to stdout and stderr it may help to redirect both to a file to see what is going on....

[robinbansal08]

Yes /tmp/cmdControl_Cam.seen is generated and I am also directing stdout and stderr in my application to a log file but they were not created by the application during sensor boot-up. Yes, I am able to run the application manually, it is dependent on mqtt static library which is kept in /opt/oem/usr/lib

[robinbansal08]

Are you able to start the script manually, I just wrote it from top of my head, is the file /tmp/cmdControl_Cam.seen generated? In case your application is writing anything to stdout and stderr it may help to redirect both to a file to see what is going on....

I am getting error when I try to the run the suggested init script manually.

oem@O3D303-41-39-20:/opt/oem/etc/init.d$ bash startupTest.sh start
startupTest.sh: line 20: start-stop-daemon: command not found

[graugans]

You have to add /sbin to the PATH

PATH=/sbin:$PATH

or run

/sbin/start-stop-daemon

[robinbansal08]

You have to add /sbin to the PATH

PATH=/sbin:$PATH

or run

/sbin/start-stop-daemon

It worked with your suggested changes. Thanks a lot for your support.