348 lines
6.9 KiB
C
348 lines
6.9 KiB
C
/*
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* ----------------------------------------------------------------------------
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* "THE BEER-WARE LICENSE" (Revision 42):
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* <phk@login.dknet.dk> 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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* $Id: disk.c,v 1.21 1996/03/24 18:55:37 joerg Exp $
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*
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*/
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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 <err.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 "libdisk.h"
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#define DOSPTYP_EXTENDED 5
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#define DOSPTYP_ONTRACK 84
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const char *chunk_n[] = {
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"whole",
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"unknown",
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"fat",
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"freebsd",
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"extended",
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"part",
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"unused",
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NULL
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};
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struct disk *
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Open_Disk(const char *name)
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{
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return Int_Open_Disk(name,0);
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}
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struct disk *
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Int_Open_Disk(const char *name, u_long size)
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{
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int i,fd;
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struct diskslices ds;
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struct disklabel dl;
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char device[64];
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struct disk *d;
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struct dos_partition *dp;
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void *p;
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u_long offset = 0;
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strcpy(device,"/dev/r");
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strcat(device,name);
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d = (struct disk *)malloc(sizeof *d);
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if(!d) err(1,"malloc failed");
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memset(d,0,sizeof *d);
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fd = open(device,O_RDONLY);
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if (fd < 0) {
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#ifdef DEBUG
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warn("open(%s) failed",device);
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#endif
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return 0;
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}
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memset(&dl,0,sizeof dl);
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ioctl(fd,DIOCGDINFO,&dl);
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i = ioctl(fd,DIOCGSLICEINFO,&ds);
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if (i < 0) {
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#ifdef DEBUG
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warn("DIOCGSLICEINFO(%s) failed",device);
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#endif
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close(fd);
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return 0;
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}
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#ifdef DEBUG
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for(i=0;i<ds.dss_nslices;i++)
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if(ds.dss_slices[i].ds_openmask)
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printf(" open(%d)=0x%2x",
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i,ds.dss_slices[i].ds_openmask);
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printf("\n");
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#endif
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if (!size)
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size = ds.dss_slices[WHOLE_DISK_SLICE].ds_size;
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p = read_block(fd,0);
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dp = (struct dos_partition*)(p+DOSPARTOFF);
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for(i=0;i<NDOSPART;i++) {
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if (dp->dp_start >= size) continue;
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if (dp->dp_start+dp->dp_size >= size) continue;
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if (!dp->dp_size) continue;
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if (dp->dp_typ == DOSPTYP_ONTRACK) {
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d->flags |= DISK_ON_TRACK;
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offset = 63;
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}
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}
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free(p);
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d->bios_sect = dl.d_nsectors;
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d->bios_hd = dl.d_ntracks;
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d->name = strdup(name);
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if (dl.d_ntracks && dl.d_nsectors)
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d->bios_cyl = size/(dl.d_ntracks*dl.d_nsectors);
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if (Add_Chunk(d, -offset, size, name, whole, 0, 0))
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#ifdef DEBUG
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warn("Failed to add 'whole' chunk");
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#else
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{}
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#endif
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for(i=BASE_SLICE;i<ds.dss_nslices;i++) {
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char sname[20];
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chunk_e ce;
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u_long flags=0;
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int subtype=0;
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if (! ds.dss_slices[i].ds_size)
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continue;
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ds.dss_slices[i].ds_offset -= offset;
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sprintf(sname,"%ss%d",name,i-1);
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subtype = ds.dss_slices[i].ds_type;
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switch (ds.dss_slices[i].ds_type) {
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case 0xa5:
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ce = freebsd;
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break;
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case 0x1:
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case 0x6:
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case 0x4:
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ce = fat;
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break;
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case DOSPTYP_EXTENDED:
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ce = extended;
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break;
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default:
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ce = unknown;
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break;
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}
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if (Add_Chunk(d, ds.dss_slices[i].ds_offset,
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ds.dss_slices[i].ds_size, sname, ce, subtype, flags))
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#ifdef DEBUG
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warn("failed to add chunk for slice %d", i - 1);
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#else
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{}
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#endif
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if (ds.dss_slices[i].ds_type != 0xa5)
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continue;
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{
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struct disklabel dl;
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char pname[20];
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int j,k;
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strcpy(pname,"/dev/r");
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strcat(pname,sname);
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j = open(pname,O_RDONLY);
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if (j < 0) {
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#ifdef DEBUG
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warn("open(%s)",pname);
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#endif
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continue;
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}
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k = ioctl(j,DIOCGDINFO,&dl);
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if (k < 0) {
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#ifdef DEBUG
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warn("ioctl(%s,DIOCGDINFO)",pname);
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#endif
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close(j);
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continue;
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}
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close(j);
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for(j=0; j <= dl.d_npartitions; j++) {
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if (j == RAW_PART)
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continue;
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if (j == 3)
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continue;
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if (j == dl.d_npartitions) {
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j = 3;
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dl.d_npartitions=0;
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}
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if (!dl.d_partitions[j].p_size)
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continue;
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if (dl.d_partitions[j].p_size +
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dl.d_partitions[j].p_offset >
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ds.dss_slices[i].ds_size)
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continue;
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sprintf(pname,"%s%c",sname,j+'a');
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if (Add_Chunk(d,
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dl.d_partitions[j].p_offset +
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ds.dss_slices[i].ds_offset,
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dl.d_partitions[j].p_size,
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pname,part,
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dl.d_partitions[j].p_fstype,
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0) && j != 3)
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#ifdef DEBUG
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warn(
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"Failed to add chunk for partition %c [%lu,%lu]",
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j + 'a',dl.d_partitions[j].p_offset,
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dl.d_partitions[j].p_size);
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#else
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{}
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#endif
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}
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}
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}
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close(fd);
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Fixup_Names(d);
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Bios_Limit_Chunk(d->chunks,1024*d->bios_hd*d->bios_sect);
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return d;
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}
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void
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Debug_Disk(struct disk *d)
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{
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printf("Debug_Disk(%s)",d->name);
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printf(" flags=%lx",d->flags);
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#if 0
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printf(" real_geom=%lu/%lu/%lu",d->real_cyl,d->real_hd,d->real_sect);
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#endif
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printf(" bios_geom=%lu/%lu/%lu\n",d->bios_cyl,d->bios_hd,d->bios_sect);
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printf(" boot1=%p, boot2=%p, bootmgr=%p\n",
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d->boot1,d->boot2,d->bootmgr);
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Debug_Chunk(d->chunks);
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}
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void
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Free_Disk(struct disk *d)
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{
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if(d->chunks) Free_Chunk(d->chunks);
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if(d->name) free(d->name);
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if(d->bootmgr) free(d->bootmgr);
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if(d->boot1) free(d->boot1);
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if(d->boot2) free(d->boot2);
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free(d);
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}
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struct disk *
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Clone_Disk(struct disk *d)
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{
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struct disk *d2;
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d2 = (struct disk*) malloc(sizeof *d2);
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if(!d2) err(1,"malloc failed");
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*d2 = *d;
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d2->name = strdup(d2->name);
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d2->chunks = Clone_Chunk(d2->chunks);
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if(d2->bootmgr) {
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d2->bootmgr = malloc(DOSPARTOFF);
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memcpy(d2->bootmgr,d->bootmgr,DOSPARTOFF);
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}
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if(d2->boot1) {
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d2->boot1 = malloc(512);
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memcpy(d2->boot1,d->boot1,512);
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}
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if(d2->boot2) {
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d2->boot2 = malloc(512*15);
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memcpy(d2->boot2,d->boot2,512*15);
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}
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return d2;
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}
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#if 0
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void
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Collapse_Disk(struct disk *d)
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{
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while(Collapse_Chunk(d,d->chunks))
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;
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}
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#endif
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static char * device_list[] = {"wd","sd",0};
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char **
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Disk_Names()
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{
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int i,j,k;
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char disk[25];
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char diskname[25];
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struct stat st;
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struct diskslices ds;
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int fd;
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static char **disks;
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disks = malloc(sizeof *disks * (1 + MAX_NO_DISKS));
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memset(disks,0,sizeof *disks * (1 + MAX_NO_DISKS));
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k = 0;
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for (j = 0; device_list[j]; j++) {
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for (i = 0; i < 10; i++) {
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sprintf(diskname, "%s%d", device_list[j], i);
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sprintf(disk, "/dev/r%s", diskname);
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if (stat(disk, &st) || !(st.st_mode & S_IFCHR))
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continue;
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if ((fd = open(disk, O_RDWR)) == -1)
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continue;
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if (ioctl(fd, DIOCGSLICEINFO, &ds) == -1) {
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close(fd);
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continue;
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}
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disks[k++] = strdup(diskname);
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if(k == MAX_NO_DISKS)
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return disks;
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}
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}
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return disks;
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}
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void
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Set_Boot_Mgr(struct disk *d, const u_char *b)
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{
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if (d->bootmgr)
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free(d->bootmgr);
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if (!b) {
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d->bootmgr = 0;
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} else {
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d->bootmgr = malloc(DOSPARTOFF);
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if(!d->bootmgr) err(1,"malloc failed");
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memcpy(d->bootmgr,b,DOSPARTOFF);
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}
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}
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void
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Set_Boot_Blocks(struct disk *d, const u_char *b1, const u_char *b2)
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{
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if (d->boot1) free(d->boot1);
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d->boot1 = malloc(512);
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if(!d->boot1) err(1,"malloc failed");
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memcpy(d->boot1,b1,512);
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if (d->boot2) free(d->boot2);
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d->boot2 = malloc(15*512);
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if(!d->boot2) err(1,"malloc failed");
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memcpy(d->boot2,b2,15*512);
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}
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