Failed at step EXEC spawning

[petrstepanov]

Dear Patrik,

First I would like to thank you for this great piece of software! Your RAMDisk is a savior. Recently I ran into an issue with starting the service. I use Fedora 35 with 5.15.14 kernel.

The output of the command sudo p3x-ramdisk start petrstepanov is following:

Job for p3x-ramdisk-petrstepanov.service failed because the control process exited with error code.

Below I attach the listing of the systemctl status p3x-ramdisk-petrstepanov.service command:

Jan 19 23:34:22 fedora systemd[1]: Starting P3X ramdisk petrstepanov persistent...
Jan 19 23:34:22 fedora systemd[15876]: p3x-ramdisk-petrstepanov.service: Failed to locate executable /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh: Permission denied
Jan 19 23:34:22 fedora systemd[15876]: p3x-ramdisk-petrstepanov.service: Failed at step EXEC spawning /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh: Permission denied
Jan 19 23:34:22 fedora systemd[1]: p3x-ramdisk-petrstepanov.service: Control process exited, code=exited, status=203/EXEC
Jan 19 23:34:22 fedora systemd[1]: p3x-ramdisk-petrstepanov.service: Failed with result 'exit-code'.
Jan 19 23:34:22 fedora systemd[1]: Failed to start P3X ramdisk petrstepanov persistent.

Also, the journalctl -xeu p3x-ramdisk-petrstepanov.service command provides following output:

░░ A start job for unit p3x-ramdisk-petrstepanov.service has begun execution.
░░ 
░░ The job identifier is 10492.
Jan 19 23:34:22 fedora systemd[15876]: p3x-ramdisk-petrstepanov.service: Failed to locate executable /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh: Permission denied
░░ Subject: Process /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh could not be executed
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░ 
░░ The process /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh could not be executed and failed.
░░ 
░░ The error number returned by this process is ERRNO.
Jan 19 23:34:22 fedora systemd[15876]: p3x-ramdisk-petrstepanov.service: Failed at step EXEC spawning /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh: Permission denied
░░ Subject: Process /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh could not be executed
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░ 
░░ The process /home/petrstepanov/.p3x-ramdisk/p3x-ramdisk.sh could not be executed and failed.
░░ 
░░ The error number returned by this process is ERRNO.
Jan 19 23:34:22 fedora systemd[1]: p3x-ramdisk-petrstepanov.service: Control process exited, code=exited, status=203/EXEC
░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░ 
░░ An ExecStartPre= process belonging to unit p3x-ramdisk-petrstepanov.service has exited.
░░ 
░░ The process' exit code is 'exited' and its exit status is 203.
Jan 19 23:34:22 fedora systemd[1]: p3x-ramdisk-petrstepanov.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░ 
░░ The unit p3x-ramdisk-petrstepanov.service has entered the 'failed' state with result 'exit-code'.
Jan 19 23:34:22 fedora systemd[1]: Failed to start P3X ramdisk petrstepanov persistent.
░░ Subject: A start job for unit p3x-ramdisk-petrstepanov.service has failed
░░ Defined-By: systemd
░░ Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
░░ 
░░ A start job for unit p3x-ramdisk-petrstepanov.service has finished with a failure.
░░ 
░░ The job identifier is 10492 and the job result is failed.

Things were working fine before. But probably after a recent system update the service is not starting anymore. So obviously the systemd cannot execute p3x-ramdisk.sh script located in the home folder. I ran into this post on StackExchange. It says the script has to be installed system-wide.

Please let me know if you can provide any help here. Thank you again for the RAMDisk!

[p3x-robot]

fix the Permission denied problem. something you did wrong. right now in a project very soon done, i will might check if it works on my machine. dont use feroda, but check the unit why is not giving permission for that shell script.

[petrstepanov]

Hi Patrik, it turned out that the systemd unit does a lot of confining for the service. In particular, it denied is access to user's home directories. Therefore, my solution was to copy the p3x-ramdisk.sh script to /usr/bin/. Apparently, script path in the service files ~/.p3x-ramdisk/*.service needs to be tweaked:

sed -i "s;${HOME}/.p3x-ramdisk/;;" ~/.p3x-ramdisk/*.service
sudo cp ${HOME}/.p3x-ramdisk/p3x-ramdisk.sh /usr/bin/

I am fine with this workaround now. Maybe in future consider making this fix permanent.

[p3x-robot]

ok, i provide an option soon, right now sick, so it might take 1 2 weeks to implememt, thanks!

[petrstepanov]

Thank you. Feel better soon!

[p3x-robot]

did you do it using as a root user? it is intended to work with other than root.
i added a systemd unit user that provide the user. please try. but do not use in root. always use it via sudo as it the description saya.
not su and not sudo -i, but as it says. it should, otherwise it is a permission issue, which chmod and chown is enough. i suppose.

https://github.com/patrikx3/ramdisk#setup