int sys_ioctl(unsigned int fd, unsigned int cmd, unsigned int arg)
{
struct file * filp;
int dev, mode;
if (fd >= NR_OPEN || !(filp = current->filp[fd]))
return -EBADF;
if (filp->f_inode->i_pipe)
return (filp->f_mode & 1) ? pipe_ioctl(filp->f_inode, cmd, arg) : -EBADF;
mode = filp->f_inode->i_mode;
if (!S_ISCHR(mode) && !S_ISBLK(mode))
return -EINVAL;
dev = filp->f_inode->i_zone[0];
if (MAJOR(dev) >= NRDEVS)
return -ENODEV;
if (!ioctl_table[MAJOR(dev)])
return -ENOTTY;
return ioctl_table[MAJOR(dev)](dev, cmd, arg);
}
static int IMFS_fifo_ioctl(
rtems_libio_t *iop,
ioctl_command_t command,
void *buffer
)
{
int err;
if (command == FIONBIO) {
if (buffer == NULL)
err = -EFAULT;
else {
if (*(int *)buffer)
iop->flags |= LIBIO_FLAGS_NO_DELAY;
else
iop->flags &= ~LIBIO_FLAGS_NO_DELAY;
return 0;
}
}
else
err = pipe_ioctl(LIBIO2PIPE(iop), command, buffer, iop);
IMFS_FIFO_RETURN(err);
}