Run script upon boot

NotionCommotion · 03-16-2017, 06:26 AM

Trying to run a c++ script upon boot on a raspberry pi.

I've tried placing it both in /etc/rc.local and using init.d, but no luck.

Then I tried it at the command line, and received an error:

Code:

michael@raspberrypi:/etc/init.d $ /home/michael/cplusclient/build/cplusclient
Failed to open cplusclient.ini, error: No such file or directory
michael@raspberrypi:/etc/init.d $

But this doesn't create an error:

Code:

michael@raspberrypi:/etc/init.d $ cd /home/michael/cplusclient/build
michael@raspberrypi:~/cplusclient/build $ .cplusclient

My current thoughts are to create the following shell script and run it upon boot:

Code:

michael@raspberrypi:/etc/init.d $ cat cplusclient.sh
#!/bin/bash

cd /home/michael/cplusclient/build
cplusclient &

michael@raspberrypi:/etc/init.d $ cat cplusclient
#!/bin/bash
# /etc/init.d/cplusclient

### BEGIN INIT INFO
# Provides:          my client
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: bla bla bla
# Description:       Start my client
### END INIT INFO
#/home/michael/cplusclient/build/cplusclient &
./cplusclient &
michael@raspberrypi:/etc/init.d $

Questions...

Am I generally doing this correct?

Do I need to run both cplusclient and cplusclient.sh in the background or just one of the two? If just one, which one?

EDIT. One more question. How do I deal with the following?

Code:

michael@cplusclient:/etc/init.d $ sudo update-rc.d cplusclient defaults
insserv: warning: script 'cplusclient.sh' missing LSB tags and overrides
michael@raspberrypi:/etc/init.d $

EDIT 2. I think I am just confusing myself. LSB errors are due to not having the appropriate comments/etc. More importantly, why use two files? For some reason, I thought I needed a sh extension on one, but now I am thinking I need to use just cplusclient and put the cd in there...

Thanks

r3sistance · 03-16-2017, 08:21 AM

Can you include the actual script itself?

It looks like you are using a relative link to cplusclient.ini within cplusclient. The script will execute that from where it is, which isn't going to be /home/michael/cplusclient/build/. As you stated adding a cd within the script may work, alternative switching the call to cplusclient.ini from a relative link to an absolute link, should also fix the problem.

Turbocapitalist · 03-16-2017, 08:23 AM

Code:

#!/bin/bash
# /etc/init.d/cplusclient

### BEGIN INIT INFO
# Provides:          my client
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: bla bla bla
# Description:       Start my client
### END INIT INFO
#/home/michael/cplusclient/build/cplusclient &
./cplusclient

You are missing the absolute path to the script cplusclient. That might be one of the problems.

TenTenths · 03-16-2017, 08:36 AM

Quote:

Originally Posted by Turbocapitalist

You are missing the absolute path to the script cplusclient. That might be one of the problems.

Specifying the absolute path won't fix it, the issue is that whatever "cplusclient" does it looks like it's attempting to look for its ini file in the folder it's called from, so the OP will need "cd /home/michael/cplusclient/build" in the script before attempting "./cplusclient"

X-LFS-2010 · 03-16-2017, 08:12 PM

cat cplusclient.sh does a cd then runs ./cplusclient

but your init.d script (does that work with systemd?) tries to run cplusclient, not cplusclient.sh, and cat cplusclient is NOT in the PATH (and you didn't set the PATH= either)

what i see is a simple error that you commented out "cd path" in init.d/cplusclient and aren't trying to run cplusclient.sh in init.d/cplusclient