What are signals?

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1

Hello!

I’m a newbie with UNIX like OSs programming and I can’t understand what
exactly is a signal.

I saw that a signal is kind of software interrupt. Is it true?

If this is a software interrupt, what is the signification of sending a
signal to a thread?
Does it mean that the interrupt handler will execute in that thread context?

Do you know good tutorials or web sites dealing with signals behavior?

Thanks!

2

Hi Vincent,

There is an “Introduction to Unix Signals Programming” document that
explains signals quite well at…

http://users.actcom.co.il/~choo/lupg/tutorials/signals/signals-programming.html

Regards,

Barry


Vincent <vincent.catros_NO_SPAM_@bigfoot.com> wrote:

Hello!

I’m a newbie with UNIX like OSs programming and I can’t understand what
exactly is a signal.

I saw that a signal is kind of software interrupt. Is it true?

If this is a software interrupt, what is the signification of sending a
signal to a thread?
Does it mean that the interrupt handler will execute in that thread context?

Do you know good tutorials or web sites dealing with signals behavior?

Thanks!