dos33fsprogs/dos33fs-utils/mkdos33fs.c
2016-12-09 20:32:34 -05:00

229 lines
6.1 KiB
C

#include <stdio.h>
#include <string.h> /* strncpy() */
#include <fcntl.h> /* open() */
#include <unistd.h> /* close() */
#include <stdlib.h> /* strtol() */
#include "version.h"
#include "dos33.h"
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 [-t track] [-s sector] [-b size] "
"[-d filename] [-f filename] device_name\n\n",binary);
printf("\t-t tracks : number of tracks in filesystem\n");
printf("\t-s sectors : number of sectors in filesystem\n");
printf("\t-b blocksize : size of sector, in bytes\n");
printf("\t-d 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("\n\n");
}
exit(0);
return;
}
int main(int argc, char **argv) {
int num_tracks=35,num_sectors=16,block_size=256;
int fd,dos_fd;
char device[BUFSIZ],dos_src[BUFSIZ];
char *buffer,*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:d:f:hv"))!=-1) {
switch (c) {
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':
block_size=strtol(optarg,&endptr,10);
if ( endptr == optarg ) usage(argv[0], 1);
break;
case 'd':
copy_dos=1;
strncpy(dos_src,optarg,BUFSIZ);
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);
/* Sanity check values */
/* s 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;
}
/* t 17->(block_size-0x38)/2 */
if ((num_tracks<18) || (num_tracks>(block_size-0x38)/2)) {
printf("Number of tracks must be >18 and <=%i (block_size-0x38)/2\n\n",
(block_size-0x38)/2);
goto end_of_program;
}
/* sector_size 256->65536 (or 512 basedon one bye t/s size field?) */
if ((block_size<256)||(block_size>65536)) {
printf("Block size must be >=256 and <65536\n\n");
goto end_of_program;
}
buffer=calloc(1,sizeof(char)*block_size);
/* Open device */
fd=open(device,O_RDWR|O_CREAT,0666);
if (fd<0) {
fprintf(stderr,"Error opening %s\n",device);
goto end_of_program;
}
/* zero out file */
for(i=0;i<num_tracks*num_sectors;i++) {
result=write(fd,buffer,block_size);
}
/* 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,buffer,block_size);
result=write(fd,buffer,block_size);
}
close(dos_fd);
/* Set boot filename */
/* Track 1 sector 9 */
lseek(fd,((1*num_sectors)+9)*block_size,SEEK_SET);
result=read(fd,buffer,block_size);
/* filename begins at offset 75 */
for(i=0;i<30;i++) {
buffer[0x75+i]=boot_filename[i]|0x80;
}
lseek(fd,((1*num_sectors)+9)*block_size,SEEK_SET);
result=write(fd,buffer,block_size);
}
/* clear buffer */
for(i=0;i<block_size;i++) buffer[i]=0;
/* Create VTOC */
buffer[VTOC_DOS_RELEASE]=0x3; /* fake dos 3.3 */
buffer[VTOC_CATALOG_T]=0x11;
buffer[VTOC_CATALOG_S]=num_sectors-1;
/* 1st Catalog typically at 0x11/0xf */
buffer[VTOC_DISK_VOLUME]=254; /* typical volume 254 */
buffer[VTOC_MAX_TS_PAIRS]=((block_size-0xc)/2)&0xff;
/* Number of T/S pairs fitting */
/* in a T/S list sector */
/* Note, overflows if block_size>524 */
buffer[VTOC_LAST_ALLOC_T]=0x12; /* last track space was allocated */
/* Start at middle, work way out */
buffer[VTOC_ALLOC_DIRECT]=1; /* Working our way outward */
buffer[VTOC_NUM_TRACKS]=num_tracks;
buffer[VTOC_S_PER_TRACK]=num_sectors;
buffer[VTOC_BYTES_PER_SL]=block_size&0xff;
buffer[VTOC_BYTES_PER_SH]=(block_size>>8)&0xff;
/* Set sector bitmap so whole disk is free */
for(i=VTOC_FREE_BITMAPS;i<block_size;i+=4) {
buffer[i]=0xff;
buffer[i+1]=0xff;
if (num_sectors>16) {
buffer[i+2]=0xff;
buffer[i+3]=0xff;
}
}
/* reserve track 0 */
/* No user data can be stored here as track=0 is special case */
/* end of file indicator */
buffer[VTOC_FREE_BITMAPS]=0x00;
buffer[VTOC_FREE_BITMAPS+1]=0x00;
buffer[VTOC_FREE_BITMAPS+2]=0x00;
buffer[VTOC_FREE_BITMAPS+3]=0x00;
/* if copying dos reserve tracks 1 and 2 as well */
if (copy_dos) {
buffer[VTOC_FREE_BITMAPS+4]=0x00;
buffer[VTOC_FREE_BITMAPS+5]=0x00;
buffer[VTOC_FREE_BITMAPS+6]=0x00;
buffer[VTOC_FREE_BITMAPS+7]=0x00;
buffer[VTOC_FREE_BITMAPS+8]=0x00;
buffer[VTOC_FREE_BITMAPS+9]=0x00;
buffer[VTOC_FREE_BITMAPS+10]=0x00;
buffer[VTOC_FREE_BITMAPS+11]=0x00;
}
/* reserve track 17 (0x11) */
/* reserved for vtoc and catalog stuff */
buffer[VTOC_FREE_BITMAPS+17*4]=0x00;
buffer[VTOC_FREE_BITMAPS+17*4+1]=0x00;
buffer[VTOC_FREE_BITMAPS+17*4+2]=0x00;
buffer[VTOC_FREE_BITMAPS+17*4+3]=0x00;
/* Write out VTOC to disk */
lseek(fd,((17*num_sectors)+0)*block_size,SEEK_SET);
result=write(fd,buffer,block_size);
if (result<0) fprintf(stderr,"Error writing!\n");
/* clear buffer */
for(i=0;i<block_size;i++) buffer[i]=0;
/* Set catalog next pointers */
for(i=(num_sectors-1);i>1;i--) {
buffer[1]=0x11;
buffer[2]=i-1;
lseek(fd,((17*num_sectors)+i)*block_size,SEEK_SET);
result=write(fd,buffer,block_size);
if (result<0) fprintf(stderr,"Error writing!\n");
}
close(fd);
end_of_program:
return 0;
}