Improve the ProcError about procfs HOT 2 CLOSED

Good suggestions.

Regarding the NotFound variant, this can be raised if we think that a certain file should exist (basically anything under /proc, like /proc/self/maps), but this file doesn't exist. If you know what function returned this error, generally the docs for that function should say that file it's trying to read.

What if the NotFound variant included the a PathBuf to the thing it was trying to open? Would that be helpful?

Also, Implementing Error and Display is a good idea, I'll do that (or a PR would be welcome if you wanted to do it)

from procfs.

If you know what function returned this error, generally the docs for that function should say that file it's trying to read.

I as the programmer might track that down, using the source code and the docs. But an administrator reading through logs where it ended up as a warning or some other user might have hard time.

What if the NotFound variant included the a PathBuf to the thing it was trying to open? Would that be helpful?

Yes, definitely.

from procfs.