What is a event in linux and why is access to /proc/acpi/event denied even to root

[vickey_20]

Hey there
I m inside the /proc/acpi/ directory , there is a file called event present.

file event

returns an empty file. But

vi event

opens the file but says access denied( I m the root here). I went through the man pages of acpid and found it mentioning event file is read by it( wat is it here exactly ) and what exactly is an event

[Bemk]

I'm not sure, but wasn't the /proc directory mounted by the kernel? I'd stay away from that directory unless you know what you're doing, and let the kernel manage all of it. At least do not edit any of the files.

[meton_magis]

I'd use cat or less commands to view stuff in proc. Unless you know what you're doing, inputing data into stuff in proc can blow up your computer .... maybe not, but it will cause problems, so do it on sandboxes only.

[vickey_20]

thanks for replying
Even I m nt playing around with with those files. BTW what is a sandbox( I knw its a silly question but wat it is??)

[Freston]

/proc/acpi/event is locked, even for root, as long as the acpid daemon is running. When you switch off the daemon you can view it... it gives real time responses to events, so `cat /proc/acpi/event` gives no output until an event takes place. This is because although the files in /proc look like normal flat text files, but they are not. They are kernel info, represented to you, the reader, in the format of a filesystem. They are not on disk.

It's far easier to just view the contents of the logfile (that is on disk): `cat /var/log/acpid`, this is where /proc/acpi/event gets logged.

[jayd512]

BTW what is a sandbox( I knw its a silly question but wat it is??)

If I'm reading the right context in the post... I thing a sandbox is a computer that you don't really mind screwing up or having it take a dump on you.
sandbox = cat's litter box

[i92guboj]

A sandbox is an enclosed environment which is completely isolated and separated from your main OS. It can be a separate computer whose life you don't respect too much, or it can be for example some kind of virtual machine. In other contexts it can be just a separate directory, for example, the Gentoo portage tool installs the programs into a sandbox before dumping them into the system root /. That way, if the install fails there's not a partial package with files spread all around your system.

Depending on the task a sandbox can be any other thing, like a separate user where you run wine to avoid harming your files on the main account.

[meton_magis]

^ what they said ^

[vickey_20]

dude What has sparked u off!!

[jayd512]

dude What has sparked u off!!

Are you referring to the reply from i92guboj?
Cuz I found it to be a great explanation to your question?

If you mean meton_magis, he was just agreeing with the definition.

???