Catch exception in call to psutil .cmdline()

[zoitrok]

There's a race condition where processes might disappear while filtering. The uncaught exception causes a crash.

See the following stack trace:
Traceback (most recent call last):
File "/usr/bin/auto-cpufreq", line 226, in
main()
File "/usr/lib/python3.10/site-packages/click/core.py", line 1130, in call
return self.main(*args, **kwargs)
File "/usr/lib/python3.10/site-packages/click/core.py", line 1055, in main
rv = self.invoke(ctx)
File "/usr/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/lib/python3.10/site-packages/click/core.py", line 760, in invoke
return __callback(*args, **kwargs)
File "/usr/bin/auto-cpufreq", line 117, in main
running_daemon()
File "/usr/lib/python3.10/site-packages/auto_cpufreq/core.py", line 1190, in running_daemon
if is_running("auto-cpufreq", "--daemon"):
File "/usr/lib/python3.10/site-packages/auto_cpufreq/core.py", line 1175, in is_running
for s in filter(lambda x: program in x, p.cmdline()):
File "/usr/lib/python3.10/site-packages/psutil/init.py", line 684, in cmdline
return self._proc.cmdline()
File "/usr/lib/python3.10/site-packages/psutil/_pslinux.py", line 1668, in wrapper
raise NoSuchProcess(self.pid, self._name)
psutil.NoSuchProcess: process no longer exists (pid=669342)

[AdnanHodzic]

Nice catch and thank your contribution, but there's one problem.

On master branch changes, if auto-cpufreq daemon is installed (sudo auto-cpufreq --install), and I subsequently run:

sudo auto-cpufreq --live   

Using settings defined in /etc/auto-cpufreq.conf file

Note: You can quit live mode by pressing "ctrl+c"

------------------------ auto-cpufreq running ------------------------------

ERROR: auto-cpufreq is running in daemon mode.

Make sure to stop the daemon before running with --live or --monitor mode

or

sudo auto-cpufreq --monitor

Using settings defined in /etc/auto-cpufreq.conf file

Note: You can quit monitor mode by pressing "ctrl+c"

------------------------ auto-cpufreq running ------------------------------

ERROR: auto-cpufreq is running in daemon mode.

Make sure to stop the daemon before running with --live or --monitor mode

-------------------------------------------------------------------------------

But with your changes, if daemon is installed I won't get any of these errors and then we'll have duplicate (live, mointor) instance of auto-cpufreq running which will be counter productive.

[zoitrok]

Looks like I was overcomplicating it a bit. I'm not so familiar with python nor lambdas.

This amended commit seems to do what it's supposed to with daemon running and trying a live session. (and probably as fast as the original function).

[AdnanHodzic]

Great, these changes make lot more sense! I also noticed there's a bug (unrelated to your PR) where user will be able to run multiple instances of sudo auto-cpufreq --live.

Again, thank you for your contribution and you made it at the perfect moment as today or tomorrow I'll make a new release in which of course you'll be credited for you work.