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Fwd: signal
---------- Forwarded message ----------
From: hari krishnan <p.harikrishnan22@xxxxxxxxx>
Date: Jul 8, 2005 11:55 AM
Subject: Re: signal
To: Anurag Verma <averma@xxxxxxxxxxxxxxxxxxx>
well signal can be send to a process either from kernel or from another process
If signal send by user process kernel ( send_sig_info() ) will
determine whether the operation is allowed.
In this case if User process given signal : while returning from
Interrups & Exceptions kernel
will check the value of the sigpending flag of the process despriptor
before allowing process to resume its exetution in user mode.if the
flag is set it will invoke respective singal handler.
regards
hari
On 07 Jul 2005 12:34:15 +0530, Anurag Verma <averma@xxxxxxxxxxxxxxxxxxx> wrote:
> Hi All
> Can u please tell me when a process is busy in executing a system call,
> and then another process sends a signal then what will happen to the
> exectution of system call. Will it be interrupted ?
> If not then once the system call execution is finished then the signal
> handler will be invoked?
> Please clarify me.
> Thanks in advance.
> bye
> Anu
>
>
>
>
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