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Annotation of 43BSDReno/sys/hpdev/fdioctl.h, revision 1.1

1.1     ! root        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:  * Redistribution is only permitted until one year after the first shipment
        !            11:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !            12:  * binary forms are permitted provided that: (1) source distributions retain
        !            13:  * this entire copyright notice and comment, and (2) distributions including
        !            14:  * binaries display the following acknowledgement:  This product includes
        !            15:  * software developed by the University of California, Berkeley and its
        !            16:  * contributors'' in the documentation or other materials provided with the
        !            17:  * distribution and in all advertising materials mentioning features or use
        !            18:  * of this software.  Neither the name of the University nor the names of
        !            19:  * its contributors may be used to endorse or promote products derived from
        !            20:  * this software without specific prior written permission.
        !            21:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            22:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            23:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            24:  *
        !            25:  * from: Utah $Hdr: fdioctl.h 1.1 89/11/20$
        !            26:  *
        !            27:  *     @(#)fdioctl.h   7.1 (Berkeley) 5/8/90
        !            28:  */
        !            29: 
        !            30: /*
        !            31:  * Ioctl definitions for file (vnode) disk pseudo-device.
        !            32:  */
        !            33: 
        !            34: #define FDISKFILE      "/etc/fdisks"   /* default config file */
        !            35: 
        !            36: struct fd_ioctl {
        !            37:        char    *fd_file;       /* pathname of file to mount */
        !            38:        int     fd_size;        /* (returned) size of disk */
        !            39: };
        !            40: 
        !            41: /*
        !            42:  * Before you can use a unit, it must be configured with FDIOCSET.
        !            43:  * The configuration persists across opens and closes of the device;
        !            44:  * an FDIOCCLR must be used to reset a configuration.  An attempt to
        !            45:  * FDIOCSET an already active unit will return EBUSY.
        !            46:  */
        !            47: #define FDIOCSET       _IOWR('F', 0, struct fd_ioctl)  /* enable disk */
        !            48: #define FDIOCCLR       _IOW('F', 1, struct fd_ioctl)   /* disable disk */

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