87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
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* can do whatever you want with this stuff. If we meet some day, and you think
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* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
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* ----------------------------------------------------------------------------
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <sys/disklabel.h>
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#include <sys/diskslice.h>
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#include <paths.h>
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#include "libdisk.h"
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/*
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* XXX: A lot of hardcoded 512s probably should be foo->sector_size;
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* I'm not sure which, so I leave it like it worked before. --schweikh
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*/
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int
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Write_Disk(const struct disk *d1)
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{
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u_char buf[BBSIZE];
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char device[64];
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struct chunk *c1;
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struct disklabel *dl;
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void *p;
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uint64_t *lp, sum;
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int fd, i;
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strcpy(device, _PATH_DEV);
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strcat(device, d1->name);
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fd = open(device, O_RDWR);
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if (fd < 0)
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return (1);
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c1 = d1->chunks->part;
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if (!strcmp(c1->name, "X") || c1->type != freebsd) {
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close (fd);
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return (0);
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}
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for (i = 0; i < BBSIZE/512; i++) {
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p = read_block(fd, i + c1->offset, 512);
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memcpy(buf + 512 * i, p, 512);
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free(p);
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}
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if (d1->boot1)
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memcpy(buf + 512, d1->boot1, BBSIZE - 512);
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dl = (struct disklabel *)(buf + 512 * LABELSECTOR + LABELOFFSET);
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Fill_Disklabel(dl, d1, c1);
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/*
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* Tell SRM where the bootstrap is.
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*/
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lp = (u_long *)buf;
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lp[60] = (BBSIZE - 512) / 512; /* Length */
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lp[61] = 1; /* Start */
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lp[62] = 0; /* Flags */
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/*
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* Generate the bootblock checksum for the SRM console.
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*/
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sum = 0;
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for (i = 0; i < 63; i++)
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sum += lp[i];
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lp[63] = sum;
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for (i = 0; i < BBSIZE / 512; i++)
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write_block(fd, i + c1->offset, buf + 512 * i, 512);
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close(fd);
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return (0);
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}
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