Date: Tue, 23 Nov 1999 15:42:52 -0800 (PST) From: Alfred Perlstein <bright@wintelcom.net> To: Seva "Semenov" <seva@mtelecom.ru> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: fcntl(0,F_SETFL,O_ASYNC) & signal(SIGIO,rkbd); don't work in 3.X !!!! Message-ID: <Pine.BSF.4.21.9911231541040.4557-100000@fw.wintelcom.net> In-Reply-To: <383B1755.F432A049@mtelecom.ru>
next in thread | previous in thread | raw e-mail | index | archive | help
On Wed, 24 Nov 1999, Seva Semenov wrote:
> Why my little proggy can't get SIGIO in FreeBSD 3.3-RELEASE,
> when i type my keyboard?
>
> In 2.2.6-RELEASE it works right.
>
>
> #include <stdio.h>
> #include <fcntl.h>
> #include <string.h>
> #include <sys/types.h>
> #include <unistd.h>
> #include <err.h>
> #include <signal.h>
> #include <syslog.h>
> #include <errno.h>
> #include <err.h>
>
> void
> rkbd(int sig)
> {
> int i,j;
> u_char b[1024],*c;
>
> syslog(LOG_DEBUG,"***** ");
>
> i=read(0,b,1024);
> if(i<0)
> syslog(LOG_DEBUG,"read failed due to %s",strerror(errno));
>
> else
> if(!i)
> syslog(LOG_DEBUG,"read null bites");
> else{
> b[i]='\0';
> puts("\n******");
> fputs(b,stdout);
> puts("******\n");
> fflush(stdout);
> }
> }
>
> int
> main(int argc,char **argv)
> {
> if(fcntl(0,F_SETFL,O_ASYNC)==-1)
> err(errno,NULL);
> signal(SIGIO,rkbd);
> for(;;){
> sleep(10);
> }
> }
i'm not sure why the change happened, but here's a fix:
--- sigio.old.c Tue Nov 23 19:18:01 1999
+++ sigio.c Tue Nov 23 19:19:21 1999
@@ -36,7 +36,14 @@
int
main(int argc,char **argv)
{
+ int arg;
+
+ arg = getpid();
+
+
if(fcntl(0,F_SETFL,O_ASYNC)==-1)
+ err(errno,NULL);
+ if(fcntl(0,F_SETOWN,arg)==-1)
err(errno,NULL);
signal(SIGIO,rkbd);
for(;;){
unless this is strictly a test program you should be using
the constants "STDIN_FILENO" afaik.
-Alfred
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.4.21.9911231541040.4557-100000>