b4314abf31
to resurrect my changes for the last snapshot, which were unfortunately lost in a forest fire on time.
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
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* Copyright (c) 1994, Paul Richards.
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*
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* All rights reserved.
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*
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* This software may be used, modified, copied, distributed, and
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* sold, in both source and binary form provided that the above
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* copyright and these terms are retained, verbatim, as the first
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* lines of this file. Under no circumstances is the author
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* responsible for the proper functioning of this software, nor does
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* the author assume any responsibility for damages incurred with
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* its use.
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*/
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#include <sys/types.h>
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#include <sys/errno.h>
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#include <sys/disklabel.h>
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#include <sys/ioctl.h>
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#include <sys/fcntl.h>
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#include <sys/uio.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <dialog.h>
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#include "mbr.h"
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#include "sysinstall.h"
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extern char *bootblocks;
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extern struct mbr *mbr;
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extern char boot1[];
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extern char boot2[];
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int
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write_bootblocks(int fd, struct disklabel *lbl)
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{
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off_t of = lbl->d_partitions[OURPART].p_offset;
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Debug("Seeking to byte %ld ", of * lbl->d_secsize);
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if (lseek(fd, (of * lbl->d_secsize), SEEK_SET) < 0) {
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Fatal("Couldn't seek to start of partition\n");
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}
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enable_label(fd);
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if (write(fd, bootblocks, lbl->d_bbsize) != lbl->d_bbsize) {
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Fatal("Failed to write bootblocks (%p,%d) %d %s\n",
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bootblocks, lbl->d_bbsize,
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errno, strerror(errno)
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);
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}
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disable_label(fd);
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return(0);
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}
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int
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build_bootblocks(int dfd,struct disklabel *label,struct dos_partition *dospart)
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{
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int fd;
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off_t of = label->d_partitions[OURPART].p_offset;
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Debug("Loading boot code from %s", boot1);
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fd = open(boot1, O_RDONLY);
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if (fd < 0)
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Fatal("Couldn't open boot file %s\n", boot1);
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if (read(fd, bootblocks, MBRSIZE) < 0)
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Fatal("Couldn't read from boot file %s\n", boot1);
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if (close(fd) == -1)
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Fatal("Couldn't close boot file %s\n", boot1);
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Debug("Loading boot code from %s", boot2);
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fd = open(boot2, O_RDONLY);
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if (fd < 0)
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Fatal("Couldn't open boot file %s", boot2);
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if (read(fd, &bootblocks[MBRSIZE], (int)(label->d_bbsize - MBRSIZE)) < 0)
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Fatal("Couldn't read from boot file %s\n", boot2);
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if (close(fd) == -1)
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Fatal("Couldn't close boot file %s", boot2);
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bcopy(dospart, &bootblocks[DOSPARTOFF],
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sizeof(struct dos_partition) * NDOSPART);
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label->d_checksum = 0;
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label->d_checksum = dkcksum(label);
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bcopy(label, &bootblocks[(LABELSECTOR * label->d_secsize) + LABELOFFSET],
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sizeof *label);
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Debug("Seeking to byte %ld ", of * label->d_secsize);
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if (lseek(dfd, (of * label->d_secsize), SEEK_SET) < 0) {
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Fatal("Couldn't seek to start of partition\n");
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}
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enable_label(dfd);
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if (write(dfd, bootblocks, label->d_bbsize) != label->d_bbsize) {
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Fatal("Failed to write bootblocks (%p,%d) %d %s\n",
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bootblocks, label->d_bbsize,
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errno, strerror(errno)
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);
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}
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disable_label(dfd);
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return(0);
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}
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