Signal handlers

[Yousef Alhashemi]

On Sun, Mar 31, 2013 at 8:33 PM, Rahul Gandhi <rahul.rahulgags at gmail.com>wrote:

As per my understanding, when the signal denoted by signum occurs/is
> raised, the action is taken which can be either SIG_DFL, SIG_IGN or a
> function/handler. What i don't understand is, when we write for example signal(SIGPROF,
> handler); isn't this supposed to be asynchronous? however the code is
> executed sequentially. So, when this function is encountered, it is
> executed and when a signal is raised, how does it know what to do?
>

signal() in your example lets the operating system know that you want the
function 'handler' to be executed if SIGPROF is raised and delivered to
your process; it doesn't call the handler when that line of code is
executed.

~Yousef
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