Date: Thu, 20 Apr 1995 20:33:53 +0400 From: "Andrey A. Chernov, Black Mage" <ache@astral.msk.su> To: Rainer Wittmann UMS <rw@namu01.gwdg.de>, Garrett Wollman <wollman@halloran-eldar.lcs.mit.edu> Cc: bugs@FreeBSD.org Subject: Re: signal handling bug Message-ID: <fInpeblWR9@astral.msk.su> In-Reply-To: <9504201518.AA05095@halloran-eldar.lcs.mit.edu>; from Garrett Wollman at Thu, 20 Apr 1995 11:18:32 -0400 References: <9504201250.AA26059@namu01.gwdg.de> <9504201518.AA05095@halloran-eldar.lcs.mit.edu>
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In message <9504201518.AA05095@halloran-eldar.lcs.mit.edu> Garrett
Wollman writes:
><<On Thu, 20 Apr 95 14:50:45 +0200, rw@namu01.gwdg.de (Rainer Wittmann UMS) said:
>> Any unix system, I know, except FreeBSD 2.0, behaves as follows,
>> [description deleted]
>Then you've never before used a 4BSD system. This is very
>long-standard BSD behavior (goes back to 1982 or earlier).
>> void SIGINT_handler(void)
>void SIGINT_handler(int)
>> {
>> signal(SIGINT, (void (*)(int))SIGINT_handler);
>Obviously you're used to using System V. Delete this line.
>> fprintf(stdout, "\nSIGINT received\n");
>> }
>> char chr;
>> void main(void)
>> {
>> signal(SIGINT, (void (*)(int))SIGINT_handler);
> struct sigaction sa;
> sa.sa_handler = SIGINT_handler;
> sigemptyset(&sa.sa_mask);
> sa.sa_flags = 0;
> sigaction(SIGINT, &sa, (struct sigaction *)0);
>> errno = 0;
>> read(0, &chr, 1);
>> if( errno == EINTR ) fprintf(stdout, "errno = EINTR\n");
>> }
You even don't need such complex procedure, just use single line
siginterrupt(SIGINT, 1);
--
Andrey A. Chernov : And I rest so composedly, /Now, in my bed,
ache@astral.msk.su : That any beholder /Might fancy me dead -
FidoNet: 2:5020/230.3 : Might start at beholding me, /Thinking me dead.
RELCOM Team,FreeBSD Team : E.A.Poe From "For Annie" 1849
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