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oops, forgot to add sigio test program

master
Felix von Leitner 18 years ago
parent
commit
f77d5615b0
  1. 39
      trysigio.c

39
trysigio.c

@ -0,0 +1,39 @@
#define _GNU_SOURCE
#include <sys/types.h>
#include <sys/poll.h>
#include <signal.h>
#include <fcntl.h>
int main() {
int signum=SIGRTMIN+1;
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss,signum);
sigaddset(&ss,SIGIO);
sigprocmask(SIG_BLOCK,&ss,0);
fcntl(0 /* fd */,F_SETOWN,getpid());
fcntl(0 /* fd */,F_SETSIG,signum);
#if defined(O_ONESIGFD) && defined(F_SETAUXFL)
fcntl(0 /* fd */, F_SETAUXFL, O_ONESIGFD);
#endif
fcntl(0 /* fd */,F_SETFL,fcntl(0 /* fd */,F_GETFL)|O_NONBLOCK|O_ASYNC);
{
siginfo_t info;
struct timespec timeout;
int r;
timeout.tv_sec=1; timeout.tv_nsec=0;
switch ((r=sigtimedwait(&ss,&info,&timeout))) {
case SIGIO:
/* signal queue overflow */
signal(signum,SIG_DFL);
/* do poll */
break;
default:
if (r==signum) {
printf("event %c%c on fd #%d\n",info.si_band&POLLIN?'r':'-',info.si_band&POLLOUT?'w':'-',info.si_fd);
}
}
}
}
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