How to run a script from an app?

[ga.imparato]

Hi all!
I have a script that enables my CAN drivers. This is the script:
#!/bin/sh

drv=“can_iot.ko”
kmod unload $drv

** # Output 1 to IoT slot 0 GPIO2**
** echo 7 > /sys/class/gpio/export**
** echo out > /sys/class/gpio/gpio7/direction**
** echo 1 > /sys/class/gpio/gpio7/value **
** # Route SPI to IoT slot 1**
** mux 5**
** # Reset IoT slot 1**
** mux 16**

# Bring driver back & iproute2 add in CAN
kmod load $drv
ip link set can0 type can bitrate 125000 triple-sampling on
ifconfig can0 up

This script works well when I launch it throug ./start_can.sh in /home/root of my mangOH (I put it in this folder through scp command).
At this point I want that it is lounched through an application. So I wrote this code:

in .adef:

But it doesn’t work! Also mux commands don’t work beside I added the muxctrl.api (in therminal they work).
Have I to do something other? For my project I don’t want to make script manual run but auto
Any help will be appreciated

[jyijyi]

You can use unsandboxed application with system() API to call the script.

you can see here:

Invoking shell scripts from Legato app

Thanks for the response. Unfortunately removing /bin/sh made no difference (I think I tried with and without it - should have mentioned that). Looking at the return from the system call it’s 32512, which seems like it might be a path issue, but I’m using the full path. I even tried changing to the script dir first but that didn’t work. Something to do with busybox maybe? Following your link it looks like some of the previous user’s issues were resolved by upgrading from 17.11 but we’re already …

[ga.imparato]

I understand that the system command is sufficient to run a script?

[jyijyi]

Have you tried that yet?

[ga.imparato]

yes but I obtain this error log:

The same script works well when I launch it with ./start_can.sh

[ga.imparato]

In your opinion have I to include something other? It’s strange that it can’t see mux, ifconfig, etc, I included these commands in the various .adef. On the other hand, if it hadn’t, this script wouldn’t have worked with the ./start_can.sh command on the terminal either.
sandboxed must be true or not? (in your code is false, but in this way it doesn’t see file system)

[jyijyi]

It must be unsandboxed

[ga.imparato]

okay…but I don’t understand why other commands are uncognized when I launch the script in this way

[jyijyi]

Becos it needs to be run in unsandboxed environment

[ga.imparato]

I am unsandboxed in a.adef

[jyijyi]

Then is it ok to run?

[ga.imparato]

yes, but I have errors in mux, ip and ifconfig commands. I can run correctly the script through the command ./start_can.sh on the shell

[ga.imparato]

I have to export some path in the script?

[jyijyi]

you need to use full path in the script.

you can see here:

Can't send legato command with system()

Hi, I use Legato 20.04 with a WP8548 on a Mangoh Red. My application is unsandboxed . In my application I can use system command like : system(“ls -l >> /home/test.txt”); but if I want to use system(“logread | grep MyApp >> /home/test.txt”); or system(“cm radio >> /home/test.txt”); I have a error: sh: logread: not found or sh: cm: not found Do I need to add something in my .adef to use cm or logread with system() ? Thanks, Jeremy

[ga.imparato]

I solved!
As always, everything on this board is always complicated! There is not even the linux whereis command, so I had to look for the commands one by one where they were. On average they are all in the linked / systems / current folder. Thanks for your attention, another problem solved .
However, the best procedure is yours, simply by running the script with the systems command! Great!