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dos33fsprogs
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dos33fsprogs/utils/dos33fs-utils/mkdos33fs.c

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#include <stdio.h>
#include <string.h> /* strncpy() */
#include <fcntl.h> /* open() */
#include <unistd.h> /* close() */
#include <stdlib.h> /* strtol() */
#include <errno.h>
#include "version.h"
#include "dos33.h"
int debug=0;
static void usage(char *binary,int help) {
printf("\n%s - version %s\n",binary,VERSION);
printf("\tby Vince Weaver <vince@deater.net>\n");
printf("\thttp://www.deater.net/weave/vmwprod/apple/\n\n");
if (help) {
printf("Usage:\t%s [-d debug] [-t track] [-s sector] [-b size] "
"[-i filename] [-f filename] device_name\n\n",binary);
printf("\t-t tracks : number of tracks (default is 35)\n");
printf("\t-s sectors : number of sectors (default is 16)\n");
printf("\t-b blocksize : size of sector, in bytes (default is 256)\n");
printf("\t-i filename : file to copy first 3 tracks over from\n");
printf("\t-f filename : name of BASIC file to autoboot. Default is HELLO\n");
printf("\t-m maxfiles : maximum files in CATALOG (default is 105)\n");
printf("\t-n volume : volume number (default is 254)\n");
printf("\n\n");
}
exit(0);
return;
}
int main(int argc, char **argv) {
int num_tracks=35,num_sectors=16,sector_size=256;
int max_files=105,catalog_track=17,vtoc_track=17,volume_number=254;
int catalog_sectors,current_sector,current_track;
int next_track,next_sector;
int max_ts_pairs=255;
int fd,dos_fd;
char device[BUFSIZ],dos_src[BUFSIZ];
unsigned char *vtoc_buffer=NULL,*sector_buffer=NULL;
char *endptr;
int i,c,copy_dos=0;
int result;
char boot_filename[30]="HELLO ";
/* Parse Command Line Arguments */
while ((c = getopt (argc, argv,"t:s:b:df:i:m:n:hv"))!=-1) {
switch (c) {
case 'd':
debug=1;
break;
case 't':
num_tracks=strtol(optarg,&endptr,10);
if ( endptr == optarg ) usage(argv[0], 1);
break;
case 's':
num_sectors=strtol(optarg,&endptr,10);
if ( endptr == optarg ) usage(argv[0], 1);
break;
case 'b':
sector_size=strtol(optarg,&endptr,10);
if ( endptr == optarg ) usage(argv[0], 1);
break;
case 'm':
max_files=strtol(optarg,&endptr,10);
if ( endptr == optarg ) usage(argv[0], 1);
break;
case 'n':
volume_number=strtol(optarg,&endptr,10);
if ( endptr == optarg ) usage(argv[0], 1);
break;
case 'i':
copy_dos=1;
strncpy(dos_src,optarg,BUFSIZ-1);
break;
case 'f':
if (strlen(optarg)>30) {
fprintf(stderr,"Auto boot filename too long!\n");
exit(1);
}
memcpy(boot_filename,optarg,strlen(optarg));
for(i=strlen(optarg);i<30;i++) boot_filename[i]=' ';
// printf("Writing boot filename \"%s\"\n",boot_filename);
break;
case 'v': usage(argv[0],0);
case 'h': usage(argv[0],1);
}
}
if (optind==argc) {
printf("Error! Must include device name\n\n");
goto end_of_program;
}
strncpy(device,argv[optind],BUFSIZ-1);
/***********************/
/* Sanity check values */
/***********************/
/* sectors: 2->32 (limited by 4-byte bitfields) */
if ((num_sectors<2) || (num_sectors>32)) {
printf("Number of sectors must be >2 and <=32\n\n");
goto end_of_program;
}
/* tracks 18-50 ->(sector_size-0x38)/4 */
/* limited by VTOC room for freespace bitmap (which is $38 to $ff) */
/* VOTC is always on track 17 so we need at least that many */
/* though could double if we used the unused sector fields */
if ((num_tracks<vtoc_track) || (num_tracks>(sector_size-0x38)/4)) {
printf("Number of tracks must be >%d and <=%i\n\n",
vtoc_track,(sector_size-0x38)/4);
goto end_of_program;
}
/* sector_size 256->65536 (or 512 based on one byte t/s size field?) */
if ((sector_size<256)||(sector_size>65536)) {
printf("Block size must be >=256 and <65536\n\n");
goto end_of_program;
}
/* allocate space for buffers */
vtoc_buffer=calloc(1,sizeof(char)*sector_size);
if (vtoc_buffer==NULL) {
fprintf(stderr,"Error allocating memory!\n");
goto end_of_program;
}
sector_buffer=calloc(1,sizeof(char)*sector_size);
if (sector_buffer==NULL) {
fprintf(stderr,"Error allocating memory!\n");
goto end_of_program;
}
/* Open device */
fd=open(device,O_RDWR|O_CREAT,0666);
if (fd<0) {
fprintf(stderr,"Error opening %s (%s)\n",
device,strerror(errno));
goto end_of_program;
}
/* zero out file */
for(i=0;i<num_tracks*num_sectors;i++) {
result=write(fd,vtoc_buffer,sector_size);
}
/**************************/
/* Calculating Paramaters */
/**************************/
if (volume_number>255) {
printf("Warning! Truncating volume number %d to %d\n",
volume_number,volume_number&0xff);
volume_number&=0xff;
}
if (catalog_track>num_tracks) {
printf("Warning! Catalog track too high! Adjusting...\n");
catalog_track=(num_tracks/2)+1;
}
if (vtoc_track>num_tracks) {
printf("Warning! VTOC track too high! Adjusting...\n");
vtoc_track=(num_tracks/2)+1;
}
if (vtoc_track!=17) {
printf("Warning! VTOC track is %d, not 17, so unpatched DOS won't be able to find it!\n",
vtoc_track);
}
max_ts_pairs=((sector_size-0xc)/2);
if (max_ts_pairs>255) {
printf("Warning! Truncating max_ts pairs to 255\n");
max_ts_pairs=255;
}
/* default is 105 files (15 catalog sectors) */
catalog_sectors=max_files/7;
if (max_files%7) catalog_sectors++;
if (catalog_sectors>num_sectors-1) {
printf("Warning! num_files higher than normal %d sectors, ususal is %d\n",catalog_sectors,num_sectors-1);
}
/***************/
/* Create VTOC */
/***************/
/* fake dos 3.3 */
vtoc_buffer[VTOC_DOS_RELEASE]=0x3;
/* 1st Catalog typically at 0x11/0xf */
vtoc_buffer[VTOC_CATALOG_T]=catalog_track;
vtoc_buffer[VTOC_CATALOG_S]=num_sectors-1;
/* typically volume is 254 */
vtoc_buffer[VTOC_DISK_VOLUME]=volume_number;
/* Number of T/S pairs fitting */
/* in a T/S list sector */
/* Note, overflows if sector_size>524 */
vtoc_buffer[VTOC_MAX_TS_PAIRS]=max_ts_pairs;
/* last track space was allocated on */
/* so filesystem can try to do things in order */
/* also start at catalog track and work our way outward */
vtoc_buffer[VTOC_LAST_ALLOC_T]=catalog_track+1;
vtoc_buffer[VTOC_ALLOC_DIRECT]=1;
vtoc_buffer[VTOC_NUM_TRACKS]=num_tracks;
vtoc_buffer[VTOC_S_PER_TRACK]=num_sectors;
vtoc_buffer[VTOC_BYTES_PER_SL]=sector_size&0xff;
vtoc_buffer[VTOC_BYTES_PER_SH]=(sector_size>>8)&0xff;
/* Set sector bitmap so whole disk is free */
for(i=0;i<num_tracks;i++) {
vtoc_buffer[VTOC_FREE_BITMAPS+(i*4)]=0xff;
vtoc_buffer[VTOC_FREE_BITMAPS+(i*4)+1]=0xff;
if (num_sectors>16) {
vtoc_buffer[VTOC_FREE_BITMAPS+(i*4)+2]=0xff;
vtoc_buffer[VTOC_FREE_BITMAPS+(i*4)+3]=0xff;
}
}
/* Copy over OS from elsewhere, if desired */
if (copy_dos) {
dos_fd=open(dos_src,O_RDONLY);
if (fd<0) {
fprintf(stderr,"Error opening %s\n",dos_src);
goto end_of_program;
}
lseek(fd,0,SEEK_SET);
/* copy first 3 sectors */
for(i=0;i<3*(num_sectors);i++) {
result=read(dos_fd,sector_buffer,sector_size);
result=write(fd,sector_buffer,sector_size);
}
close(dos_fd);
/* Set boot filename */
/* Track 1 sector 9 */
lseek(fd,((1*num_sectors)+9)*sector_size,SEEK_SET);
result=read(fd,sector_buffer,sector_size);
/* filename begins at offset 75 */
for(i=0;i<30;i++) {
sector_buffer[0x75+i]=boot_filename[i]|0x80;
}
lseek(fd,((1*num_sectors)+9)*sector_size,SEEK_SET);
result=write(fd,sector_buffer,sector_size);
/* if copying dos reserve tracks 1 and 2 as well */
for(i=0;i<num_sectors;i++) {
dos33_vtoc_reserve_sector(vtoc_buffer, 1, i);
}
/* free some room as DOS doesn't use all */
/* of track 2, only sectors 0-4 */
dos33_vtoc_reserve_sector(vtoc_buffer, 2, 0);
dos33_vtoc_reserve_sector(vtoc_buffer, 2, 1);
dos33_vtoc_reserve_sector(vtoc_buffer, 2, 2);
dos33_vtoc_reserve_sector(vtoc_buffer, 2, 3);
dos33_vtoc_reserve_sector(vtoc_buffer, 2, 4);
}
/* reserve track 0 */
/* No user data can be stored here as track=0 is used */
/* as a special-case end of file indicator */
for(i=0;i<num_sectors;i++) {
dos33_vtoc_reserve_sector(vtoc_buffer, 0, i);
}
/********************/
/* reserve the VTOC */
/********************/
dos33_vtoc_reserve_sector(vtoc_buffer, vtoc_track, 0);
/*****************/
/* Setup Catalog */
/*****************/
/* clear buffer */
memset(sector_buffer,0,sector_size);
/* Set catalog next pointers */
/* start at T17S15 */
vtoc_buffer[VTOC_LAST_ALLOC_T]=17;
vtoc_buffer[VTOC_ALLOC_DIRECT]=255; /* -1 direction */
/* Get first catalog sector */
if (dos33_vtoc_find_free_sector(vtoc_buffer,
&current_track,&current_sector,1)) {
return ERROR_NO_SPACE;
}
for(i=0;i<catalog_sectors;i++) {
/* point to next */
/* for first sector_size-1 walk backwards from T17S15 */
/* if more, allocate room on disk */
/* Max on 140k disk is 280 or so */
if (i==catalog_sectors-1) {
/* last one, pointer is to 0,0 */
next_track=0;
next_sector=0;
}
else {
if (dos33_vtoc_find_free_sector(vtoc_buffer,
&next_track,&next_sector,1)) {
return ERROR_NO_SPACE;
}
}
if (debug) {
printf("Writing catalog track %d at "
"T$%02X:S$%02X, next=T$%02X:S$%02X\n",
i,current_track,current_sector,
next_track,next_sector);
}
sector_buffer[1]=next_track;
sector_buffer[2]=next_sector;
lseek(fd,((current_track*num_sectors)+current_sector)*
sector_size,SEEK_SET);
result=write(fd,sector_buffer,sector_size);
if (result!=sector_size) {
fprintf(stderr,"Error writing catalog sector %d! (%s)\n",
current_sector,strerror(errno));
}
current_track=next_track;
current_sector=next_sector;
}
/**************************/
/* Write out VTOC to disk */
/**************************/
lseek(fd,((vtoc_track*num_sectors)+0)*sector_size,SEEK_SET);
result=write(fd,vtoc_buffer,sector_size);
if (result<0) {
fprintf(stderr,"Error writing VTOC (%s)!\n",strerror(errno));
}
close(fd);
end_of_program:
if (vtoc_buffer) free(vtoc_buffer);
if (sector_buffer) free(sector_buffer);
return 0;
}
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