C++ (Cpp) _zft_open 예제들

예제 #1

파일: zftape-init.c 프로젝트: archith/camera_project

/*      Open floppy tape device
 */
static int zft_open(struct inode *ino, struct file *filep)
{
	int result;
	TRACE_FUN(ft_t_flow);

	TRACE(ft_t_flow, "called for minor %d", MINOR(ino->i_rdev));
	if (busy_flag) {
		TRACE_ABORT(-EBUSY, ft_t_warn, "failed: already busy");
	}
	busy_flag = 1;
	if ((MINOR(ino->i_rdev) & ~(ZFT_MINOR_OP_MASK | FTAPE_NO_REWIND))
	     > 
	    FTAPE_SEL_D) {
		busy_flag = 0;
		TRACE_ABORT(-ENXIO, ft_t_err, "failed: illegal unit nr");
	}
	orig_sigmask = current->blocked;
	sigfillset(&current->blocked);
	result = _zft_open(MINOR(ino->i_rdev), filep->f_flags & O_ACCMODE);
	if (result < 0) {
		current->blocked = orig_sigmask; /* restore mask */
		busy_flag = 0;
		TRACE_ABORT(result, ft_t_err, "_ftape_open failed");
	} else {
		/* Mask signals that will disturb proper operation of the
		 * program that is calling.
		 */
		current->blocked = orig_sigmask;
		sigaddsetmask (&current->blocked, _DO_BLOCK);
		TRACE_EXIT 0;
	}
}

예제 #2

파일: zftape-init.c 프로젝트: FatSunHYS/OSCourseDesign

/*      Open floppy tape device
 */
static int zft_open(struct inode *ino, struct file *filep)
{
	int result;
	TRACE_FUN(ft_t_flow);

	nonseekable_open(ino, filep);
	TRACE(ft_t_flow, "called for minor %d", iminor(ino));
	if ( test_and_set_bit(0,&busy_flag) ) {
		TRACE_ABORT(-EBUSY, ft_t_warn, "failed: already busy");
	}
	if ((iminor(ino) & ~(ZFT_MINOR_OP_MASK | FTAPE_NO_REWIND))
	     > 
	    FTAPE_SEL_D) {
		clear_bit(0,&busy_flag);
		TRACE_ABORT(-ENXIO, ft_t_err, "failed: invalid unit nr");
	}
	orig_sigmask = current->blocked;
	sigfillset(&current->blocked);
	result = _zft_open(iminor(ino), filep->f_flags & O_ACCMODE);
	if (result < 0) {
		current->blocked = orig_sigmask; /* restore mask */
		clear_bit(0,&busy_flag);
		TRACE_ABORT(result, ft_t_err, "_ftape_open failed");
	} else {
		/* Mask signals that will disturb proper operation of the
		 * program that is calling.
		 */
		current->blocked = orig_sigmask;
		sigaddsetmask (&current->blocked, _DO_BLOCK);
		TRACE_EXIT 0;
	}
}