[unix-history] / usr / src / sys / dev / vnioctl.h

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * the Systems Programming Group of the University of Utah Computer
 * Science Department.
 *
 * %sccs.include.redist.c%
 *
 * from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
 *
 *	@(#)vnioctl.h	7.2 (Berkeley) %G%
 */

/*
 * Ioctl definitions for file (vnode) disk pseudo-device.
 */

#define FDISKFILE	"/etc/fdisks"	/* default config file */

struct fd_ioctl {
	char	*fd_file;	/* pathname of file to mount */
	int	fd_size;	/* (returned) size of disk */
};

/*
 * Before you can use a unit, it must be configured with FDIOCSET.
 * The configuration persists across opens and closes of the device;
 * an FDIOCCLR must be used to reset a configuration.  An attempt to
 * FDIOCSET an already active unit will return EBUSY.
 */
#define FDIOCSET	_IOWR('F', 0, struct fd_ioctl)	/* enable disk */
#define FDIOCCLR	_IOW('F', 1, struct fd_ioctl)	/* disable disk */
Commit	Line	Data
60f56dfc KM	1	/*
	2	* Copyright (c) 1988 University of Utah.
	3	* Copyright (c) 1990 The Regents of the University of California.
	4	* All rights reserved.
	5	*
	6	* This code is derived from software contributed to Berkeley by
	7	* the Systems Programming Group of the University of Utah Computer
	8	* Science Department.
	9	*
	10	* %sccs.include.redist.c%
	11	*
f7c89fbb	12	* from: Utah $Hdr: fdioctl.h 1.1 90/07/09$
60f56dfc	13	*
f7c89fbb	14	* @(#)vnioctl.h 7.2 (Berkeley) %G%
60f56dfc KM	15	*/
	16
	17	/*
	18	* Ioctl definitions for file (vnode) disk pseudo-device.
	19	*/
	20
	21	#define FDISKFILE "/etc/fdisks" /* default config file */
	22
	23	struct fd_ioctl {
	24	char fd_file; / pathname of file to mount */
	25	int fd_size; /* (returned) size of disk */
	26	};
	27
	28	/*
	29	* Before you can use a unit, it must be configured with FDIOCSET.
	30	* The configuration persists across opens and closes of the device;
	31	* an FDIOCCLR must be used to reset a configuration. An attempt to
	32	* FDIOCSET an already active unit will return EBUSY.
	33	*/
	34	#define FDIOCSET _IOWR('F', 0, struct fd_ioctl) /* enable disk */
	35	#define FDIOCCLR _IOW('F', 1, struct fd_ioctl) /* disable disk */