Creating a sysctl variable ?

Hi,

I'd need to create a variable that keeps track of something happening in my function. So I don't want my variable to be initialized each time the function is called, I want it to stay.

I guess I can create a sysctl variable for that purpose. How do I do that ?

The thing is, the function is part of the linux TCP stack, and I don't know where the most global variable are declared. I'm a beginner in C programming & Linux.

I think perhaps you just want a local static variable in your function.

Okay, but where do I declare it ? I don't want it to be declared in a function where it'd intinialized several times. The function I'm talking about will be part of the Linux TCP stack. I'm a beginner in programming.

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Originally Posted by taupin

Okay, but where do I declare it ?

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Inside your function like I said.

Quote:

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Originally Posted by taupin

I don't want it to be declared in a function where it'd intinialized several times.

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Read up on static variables. They are akin in ways to global variables with limited scope. They are initialized once and then only altered as you change them.

Quote:

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Originally Posted by taupin

The function I'm talking about will be part of the Linux TCP stack. I'm a beginner in programming.

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Quite a paradox.

Alright, I didn't know about static variables. Thanks :)