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/*
* Mach Operating System
* Copyright (c) 1993,1991,1990 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: rz_disk.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 10/90
*
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <device/device_types.h>
#include <device/disk_status.h>
/* Checksum a disk label */
unsigned
dkcksum(lp)
struct disklabel *lp;
{
register unsigned short *start, *end, sum = 0;
start = (unsigned short *)lp;
end = (unsigned short*)&lp->d_partitions[lp->d_npartitions];
while (start < end) sum ^= *start++;
return sum;
}
/* Perform some checks and then copy a disk label */
setdisklabel(lp, nlp)
struct disklabel *lp, *nlp;
{
if (nlp->d_magic != DISKMAGIC || nlp->d_magic2 != DISKMAGIC ||
(dkcksum(nlp) != 0))
return D_INVALID_OPERATION;
*lp = *nlp;
return D_SUCCESS;
}
dkgetlabel(lp, flavor, data, count)
struct disklabel *lp;
int flavor;
int * data; /* pointer to OUT array */
unsigned int *count; /* OUT */
{
switch (flavor) {
/* get */
case DIOCGDINFO:
*(struct disklabel *)data = *lp;
*count = sizeof(struct disklabel)/sizeof(int);
break;
case DIOCGDINFO - (0x10<<16):
*(struct disklabel *)data = *lp;
*count = sizeof(struct disklabel)/sizeof(int) - 4;
break;
}
}
print_bsd_label(lp, str)
struct disklabel *lp;
char *str;
{
int i;
printf("%s sectors %d, tracks %d, cylinders %d\n",
str, lp->d_nsectors, lp->d_ntracks, lp->d_ncylinders);
printf("%s secpercyl %d, secperunit %d, npartitions %d\n",
str, lp->d_secpercyl, lp->d_secperunit, lp->d_npartitions);
for (i = 0; i < lp->d_npartitions; i++) {
printf("%s %c: size = %d, offset = %d\n",
str, 'a'+i,
lp->d_partitions[i].p_size,
lp->d_partitions[i].p_offset);
}
}
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