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Date: Fri, 02 May 2014 19:16:25 +0800
From: JonY <10walls AT gmail DOT com>
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To: The Cygwin Mailing List <cygwin AT cygwin DOT com>
Subject: ioctl crash in mpg123
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Hi,

I am debugging a crash in Cygwin 1.7.29-2 ioctl but I am not familiar
with the OSS sounds API. I traced the ioctl calls and made this example,
is it supposed to work?

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>

int main(){
  int fmt =3D AFMT_MU_LAW;
  int chan =3D 0;
  int fd =3D open("/dev/dsp", O_WRONLY);
  ioctl(fd, SNDCTL_DSP_RESET, NULL);
  ioctl(fd, SNDCTL_DSP_RESET, NULL);
  ioctl(fd, SNDCTL_DSP_RESET, NULL);
  ioctl(fd, SNDCTL_DSP_SETFMT, &fmt);
  ioctl(fd, SNDCTL_DSP_STEREO, &chan); /* crashes here */
  close(fd);
  exit(0);
}


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