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dos33fsprogs/utils/dos33fs-utils/dos33.c
Vince Weaver 301eb86fc6 dos33: mkdos33fs: fix really embarassing = vs == bug 
the catalog code was mostly working by accident

should never have learned Pascal first
2022-09-05 21:09:00 -04:00

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#include <stdio.h>
#include <stdlib.h> /* exit() */
#include <string.h> /* strncpy() */
#include <sys/stat.h> /* struct stat */
#include <fcntl.h> /* O_RDONLY */
#include <unistd.h> /* lseek() */
#include <ctype.h> /* toupper() */
#include <errno.h>
#include "version.h"
#include "dos33.h"
int debug=0;
static int ignore_errors=0;
static unsigned char get_high_byte(int value) {
return (value>>8)&0xff;
}
static unsigned char get_low_byte(int value) {
return (value&0xff);
}
/* Read VTOC into a buffer */
static int dos33_read_vtoc(int fd, unsigned char *vtoc) {
int result;
/* Seek to VTOC */
lseek(fd,DISK_OFFSET(VTOC_TRACK,VTOC_SECTOR),SEEK_SET);
/* read in VTOC */
result=read(fd,vtoc,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"Error reading VTOC: %s\n",strerror(errno));
return -ERROR_VTOC;
}
return 0;
}
/* Checks if "filename" exists */
/* returns entry/track/sector */
static int dos33_check_file_exists(int fd,
char *filename,
int file_deleted) {
int catalog_track,catalog_sector;
int i,file_track;
char file_name[31];
int result;
unsigned char vtoc[BYTES_PER_SECTOR];
unsigned char catalog_buffer[BYTES_PER_SECTOR];
/* read the VTOC into buffer */
result=dos33_read_vtoc(fd,vtoc);
if (result<0) return result;
/* FIXME: we have a function for this */
/* get the catalog track and sector from the VTOC */
catalog_track=vtoc[VTOC_CATALOG_T];
catalog_sector=vtoc[VTOC_CATALOG_S];
repeat_catalog:
/* Read in Catalog Sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,catalog_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
/* scan all file entries in catalog sector */
for(i=0;i<7;i++) {
file_track=catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)];
/* 0xff means file deleted */
/* 0x0 means empty */
if (file_track!=0x0) {
if (file_track==0xff) {
dos33_filename_to_ascii(file_name,
catalog_buffer+(CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE+FILE_NAME)),29);
if (file_deleted) {
/* return if we found the file */
if (!strncmp(filename,file_name,29)) {
return ((i<<16)+(catalog_track<<8)+catalog_sector);
}
}
}
else {
dos33_filename_to_ascii(file_name,
catalog_buffer+(CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE+FILE_NAME)),30);
/* return if we found the file */
if (!strncmp(filename,file_name,30)) {
return ((i<<16)+(catalog_track<<8)+catalog_sector);
}
}
}
}
/* point to next catalog track/sector */
catalog_track=catalog_buffer[CATALOG_NEXT_T];
catalog_sector=catalog_buffer[CATALOG_NEXT_S];
if (catalog_sector!=0) goto repeat_catalog;
return -ERROR_FILE_NOT_FOUND;
}
static int dos33_free_sector(unsigned char *vtoc,int fd,int track,int sector) {
int result;
/* mark as free in VTOC */
dos33_vtoc_free_sector(vtoc,track,sector);
/* write modified VTOC back out */
lseek(fd,DISK_OFFSET(VTOC_TRACK,VTOC_SECTOR),SEEK_SET);
result=write(fd,vtoc,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"dos33_free_sector: error writing VTOC\n");
return -ERROR_VTOC;
}
return 0;
}
static int dos33_allocate_sector(int fd, unsigned char *vtoc) {
int found_track=0,found_sector=0;
int result;
/* Find an empty sector */
result=dos33_vtoc_find_free_sector(vtoc,&found_track,&found_sector,0);
if (result<0) {
fprintf(stderr,"ERROR: dos33_allocate_sector: Disk full!\n");
return -ERROR_NO_SPACE;
}
/* store new track/direction info */
vtoc[VTOC_LAST_ALLOC_T]=found_track;
if (found_track>VTOC_TRACK) vtoc[VTOC_ALLOC_DIRECT]=1;
else vtoc[VTOC_ALLOC_DIRECT]=-1;
/* Seek to VTOC */
lseek(fd,DISK_OFFSET(VTOC_TRACK,VTOC_SECTOR),SEEK_SET);
/* Write out VTOC */
result=write(fd,vtoc,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"Error on I/O\n");
return -ERROR_VTOC;
}
return ((found_track<<8)+found_sector);
}
#define ADD_RAW 0
#define ADD_BINARY 1
/* creates file apple_filename on the image from local file filename */
/* returns ?? */
static int dos33_add_file(unsigned char *vtoc,
int fd, char dos_type,
int file_type, int address, int length,
char *filename, char *apple_filename) {
int free_space,file_size,needed_sectors;
struct stat file_info;
int size_in_sectors=0;
int initial_ts_list=0,ts_list=0,i,data_ts,x,bytes_read=0,old_ts_list;
int catalog_track,catalog_sector,sectors_used=0;
int input_fd;
int result;
int first_write=1;
unsigned char ts_buffer[BYTES_PER_SECTOR];
unsigned char catalog_buffer[BYTES_PER_SECTOR];
unsigned char data_buffer[BYTES_PER_SECTOR];
if (apple_filename[0]<64) {
fprintf(stderr,"Error! First char of filename "
"must be ASCII 64 or above!\n");
if (!ignore_errors) return -ERROR_INVALID_FILENAME;
}
/* Check for comma in filename */
for(i=0;i<strlen(apple_filename);i++) {
if (apple_filename[i]==',') {
fprintf(stderr,"Error! "
"Cannot have , in a filename!\n");
return -ERROR_INVALID_FILENAME;
}
}
/* FIXME */
/* check type */
/* and sanity check a/b filesize is set properly */
/* Determine size of file to upload */
if (stat(filename,&file_info)<0) {
fprintf(stderr,"Error! %s not found!\n",filename);
return -ERROR_FILE_NOT_FOUND;
}
file_size=(int)file_info.st_size;
if (debug) printf("Filesize: %d\n",file_size);
if (file_type==ADD_BINARY) {
if (debug) printf("Adding 4 bytes for size/offset\n");
if (length==0) length=file_size;
file_size+=4;
}
/* We need to round up to nearest sector size */
/* Add an extra sector for the T/S list */
/* Then add extra sector for a T/S list every 122*256 bytes (~31k) */
needed_sectors=(file_size/BYTES_PER_SECTOR)+ /* round sectors */
((file_size%BYTES_PER_SECTOR)!=0)+/* tail if needed */
1+/* first T/S list */
(file_size/(122*BYTES_PER_SECTOR)); /* extra t/s lists */
/* Get free space on device */
free_space=dos33_vtoc_free_space(vtoc);
/* Check for free space */
if (needed_sectors*BYTES_PER_SECTOR>free_space) {
fprintf(stderr,"Error! Not enough free space "
"on disk image (need %d have %d)\n",
needed_sectors*BYTES_PER_SECTOR,free_space);
return -ERROR_NO_SPACE;
}
/* plus one because we need a sector for the tail */
size_in_sectors=(file_size/BYTES_PER_SECTOR)+
((file_size%BYTES_PER_SECTOR)!=0);
if (debug) printf("Need to allocate %i data sectors\n",size_in_sectors);
if (debug) printf("Need to allocate %i total sectors\n",needed_sectors);
/* Open the local file */
input_fd=open(filename,O_RDONLY);
if (input_fd<0) {
fprintf(stderr,"Error! could not open %s\n",filename);
return -ERROR_IMAGE_NOT_FOUND;
}
i=0;
while (i<size_in_sectors) {
/* Create new T/S list if necessary */
/* This is called for the initial creation */
/* but also every 122 sectors which is */
/* the max a T/S list can hold (30.5k) */
if (i%TSL_MAX_NUMBER==0) {
old_ts_list=ts_list;
/* allocate a sector for the new T/S list */
ts_list=dos33_allocate_sector(fd,vtoc);
sectors_used++;
if (ts_list<0) return ts_list;
/* clear the t/s sector */
memset(ts_buffer,0,BYTES_PER_SECTOR);
/* This field in the TSL descibes the file offset */
/* (in sectors from the beginning) that the first */
/* T/S entry represents */
/* We were setting this wrong for a while as I don't */
/* think DOS33 uses it, but apparently some programs do */
ts_buffer[TSL_OFFSET_H]=get_high_byte(i);
ts_buffer[TSL_OFFSET_L]=get_low_byte(i);
lseek(fd,DISK_OFFSET((ts_list>>8)&0xff,ts_list&0xff),SEEK_SET);
result=write(fd,ts_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_WRITE;
}
if (i==0) {
initial_ts_list=ts_list;
}
else {
/* we aren't the first t/s list so do special stuff */
/* load in the old t/s list */
lseek(fd,
DISK_OFFSET(get_high_byte(old_ts_list),
get_low_byte(old_ts_list)),
SEEK_SET);
result=read(fd,ts_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
/* point from old ts list to new one we just made */
ts_buffer[TSL_NEXT_TRACK]=get_high_byte(ts_list);
ts_buffer[TSL_NEXT_SECTOR]=get_low_byte(ts_list);
/* write out the old t/s list with updated info */
lseek(fd,
DISK_OFFSET(get_high_byte(old_ts_list),
get_low_byte(old_ts_list)),
SEEK_SET);
result=write(fd,ts_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_WRITE;
}
}
}
/* allocate a sector */
data_ts=dos33_allocate_sector(fd,vtoc);
/* handle error */
if (data_ts<0) return data_ts;
sectors_used++;
/* clear data sector */
memset(data_buffer,0,BYTES_PER_SECTOR);
/* read from input */
if ((first_write) && (file_type==ADD_BINARY)) {
first_write=0;
data_buffer[0]=address&0xff;
data_buffer[1]=(address>>8)&0xff;
data_buffer[2]=(length)&0xff;
data_buffer[3]=((length)>>8)&0xff;
result=read(input_fd,data_buffer+4,
BYTES_PER_SECTOR-4);
bytes_read=result+4;
}
else {
result=read(input_fd,data_buffer,
BYTES_PER_SECTOR);
bytes_read=result;
}
/* Note, we might not read a full sector worth */
/* if the file is smaller */
if (result<0) {
fprintf(stderr,"Error reading input file!\n");
return -ERROR_FILE_READ;
}
first_write=0;
/* write to disk image */
lseek(fd,DISK_OFFSET((data_ts>>8)&0xff,data_ts&0xff),SEEK_SET);
result=write(fd,data_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_WRITE;
}
if (debug) {
printf("Wrote %i bytes to %i/%i\n",
bytes_read,(data_ts>>8)&0xff,data_ts&0xff);
}
/* add to T/s table */
/* read in t/s list */
lseek(fd,DISK_OFFSET((ts_list>>8)&0xff,ts_list&0xff),SEEK_SET);
result=read(fd,ts_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
/* point to new data sector */
ts_buffer[((i%TSL_MAX_NUMBER)*2)+TSL_LIST]=(data_ts>>8)&0xff;
ts_buffer[((i%TSL_MAX_NUMBER)*2)+TSL_LIST+1]=(data_ts&0xff);
/* write t/s list back out */
lseek(fd,DISK_OFFSET((ts_list>>8)&0xff,ts_list&0xff),SEEK_SET);
result=write(fd,ts_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_WRITE;
}
i++;
}
/* Add new file to Catalog */
catalog_track=vtoc[VTOC_CATALOG_T];
catalog_sector=vtoc[VTOC_CATALOG_S];
continue_parsing_catalog:
/* Read in Catalog Sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,catalog_buffer,BYTES_PER_SECTOR);
if (result!=BYTES_PER_SECTOR) {
fprintf(stderr,"Catalog: Error, only read %d bytes at $%02X:$%02X (%s)\n",
result,catalog_track,catalog_sector,strerror(errno));
return -ERROR_NO_SPACE;
}
/* Find empty directory entry */
i=0;
while(i<7) {
/* for undelete purposes might want to skip 0xff */
/* (deleted) files first and only use if no room */
if ((catalog_buffer[CATALOG_FILE_LIST+
(i*CATALOG_ENTRY_SIZE)]==0xff) ||
(catalog_buffer[CATALOG_FILE_LIST+
(i*CATALOG_ENTRY_SIZE)]==0x00)) {
goto got_a_dentry;
}
i++;
}
catalog_track=catalog_buffer[CATALOG_NEXT_T];
catalog_sector=catalog_buffer[CATALOG_NEXT_S];
if ((catalog_track==0x0) && (catalog_sector==0)) {
/* FIXME: should really check this before we */
/* allocate space for the file, we leak */
/* if full, we have no recourse! */
/* can we auto-allocate new catalog sectors? */
/* and point to them?? */
fprintf(stderr,"Error! No more room for files!\n");
return -ERROR_CATALOG_FULL;
}
goto continue_parsing_catalog;
got_a_dentry:
// printf("Adding file at entry %i of catalog 0x%x:0x%x\n",
// i,catalog_track,catalog_sector);
/* Point entry to initial t/s list */
catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)]=(initial_ts_list>>8)&0xff;
catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)+1]=(initial_ts_list&0xff);
/* set file type */
catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)+FILE_TYPE]=
dos33_char_to_type(dos_type,0);
// printf("Pointing T/S to %x/%x\n",(initial_ts_list>>8)&0xff,initial_ts_list&0xff);
/* copy over filename */
for(x=0;x<strlen(apple_filename);x++) {
catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)+FILE_NAME+x]=
apple_filename[x]^0x80;
}
/* pad out the filename with spaces */
for(x=strlen(apple_filename);x<FILE_NAME_SIZE;x++) {
catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)+FILE_NAME+x]=' '^0x80;
}
/* fill in filesize in sectors */
catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)+FILE_SIZE_L]=
sectors_used&0xff;
catalog_buffer[CATALOG_FILE_LIST+(i*CATALOG_ENTRY_SIZE)+FILE_SIZE_H]=
(sectors_used>>8)&0xff;
/* write out catalog sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=write(fd,catalog_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"Error on I/O\n");
return -ERROR_CATALOG;
}
return 0;
}
/* load a file. fts=entry/track/sector */
static int dos33_load_file(int fd,int fts,char *filename) {
int output_fd;
int catalog_file,catalog_track,catalog_sector;
int file_type,file_size=-1,tsl_track,tsl_sector,data_t,data_s;
unsigned char data_sector[BYTES_PER_SECTOR];
unsigned char sector_buffer[BYTES_PER_SECTOR];
int tsl_pointer=0,output_pointer=0;
int result;
int total_sectors=0,last_output_pointer=0;
/* FIXME! Warn if overwriting file! */
output_fd=open(filename,O_WRONLY|O_CREAT|O_TRUNC,0666);
if (output_fd<0) {
fprintf(stderr,"Error! could not open %s for local save\n",
filename);
return -ERROR_CANNOT_OPEN;
}
catalog_file=fts>>16;
catalog_track=(fts>>8)&0xff;
catalog_sector=(fts&0xff);
/* Read in Catalog Sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
tsl_track=sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)+FILE_TS_LIST_T];
tsl_sector=sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)+FILE_TS_LIST_S];
file_type=dos33_file_type(sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)+FILE_TYPE]);
if (debug) printf("Using TSL at %02X:%02X\n",tsl_track,tsl_sector);
if (debug) printf("file_type: %c\n",file_type);
keep_saving:
/* Read in TSL Sector */
lseek(fd,DISK_OFFSET(tsl_track,tsl_sector),SEEK_SET);
result=read(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
tsl_pointer=0;
/* check each track/sector pair in the list */
while(tsl_pointer<TSL_MAX_NUMBER) {
/* get the t/s value */
data_t=sector_buffer[TSL_LIST+(tsl_pointer*TSL_ENTRY_SIZE)];
data_s=sector_buffer[TSL_LIST+(tsl_pointer*TSL_ENTRY_SIZE)+1];
if ((data_s==0) && (data_t==0)) {
/* empty */
/* this is complicated, can be a "hole" if in middle */
/* or else ignored if at the end */
}
else {
lseek(fd,DISK_OFFSET(data_t,data_s),SEEK_SET);
result=read(fd,&data_sector,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
/* some file formats have the size in the first sector */
/* so cheat and get real file size from file itself */
if (output_pointer==0) {
switch(file_type) {
case 'A':
case 'I':
file_size=data_sector[0]+
(data_sector[1]<<8)+2;
break;
case 'B':
file_size=data_sector[2]+
(data_sector[3]<<8)+4;
break;
default:
file_size=-1;
}
if (debug) printf("File size = %d\n",file_size);
}
/* write the block read in out to the output file */
lseek(output_fd,output_pointer*BYTES_PER_SECTOR,SEEK_SET);
result=write(output_fd,&data_sector,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_WRITE;
}
last_output_pointer=output_pointer+1;
}
output_pointer++;
tsl_pointer++;
}
total_sectors=last_output_pointer;
/* finished with TSL sector, see if we have another */
tsl_track=sector_buffer[TSL_NEXT_TRACK];
tsl_sector=sector_buffer[TSL_NEXT_SECTOR];
if ((tsl_track==0) && (tsl_sector==0)) {
}
else {
if (debug) printf("Next track/sector=%02X:%02X op=%d\n",
tsl_track,tsl_sector,
output_pointer*BYTES_PER_SECTOR);
goto keep_saving;
}
/* Correct the file size */
/* Note: this can cause issues if the original disk image */
/* was doing something extra-clever and intentionally */
/* had a mis-matched file size */
if (file_size>=0) {
if (debug) printf("Total size %d sectors (%d bytes)\n",
total_sectors,total_sectors*BYTES_PER_SECTOR);
/* Tricky, 0...255 will give sectors of 0 */
/* 256...511 will give sectors of 1 */
if (((file_size-1)/256)!=total_sectors-1) {
printf("Warning! Total size %d not within "
"256 bytes of sector total (%d %d)!\n",
file_size,file_size/256,total_sectors);
printf("This could mean your program is trying "
"to be clever. Not truncating.\n");
}
else {
printf("Auto-truncating file size to %d\n",file_size);
result=ftruncate(output_fd,file_size);
if (result<0) {
fprintf(stderr,"Error on I/O\n");
return -ERROR_FILE_WRITE;
}
}
}
return 0;
}
/* lock a file. fts=entry/track/sector */
static int dos33_lock_file(int fd,int fts,int lock) {
int catalog_file,catalog_track,catalog_sector;
int file_type,result;
unsigned char sector_buffer[BYTES_PER_SECTOR];
catalog_file=fts>>16;
catalog_track=(fts>>8)&0xff;
catalog_sector=(fts&0xff);
/* Read in Catalog Sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
file_type=sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)
+FILE_TYPE];
if (lock) file_type|=0x80;
else file_type&=0x7f;
sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)
+FILE_TYPE]=file_type;
/* write back modified catalog sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=write(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"Error on I/O\n");
return -ERROR_CATALOG;
}
return 0;
}
/* rename a file. fts=entry/track/sector */
/* FIXME: can we rename a locked file? */
/* FIXME: validate the new filename is valid */
static int dos33_rename_file(int fd,int fts,char *new_name) {
int catalog_file,catalog_track,catalog_sector;
int x,result;
unsigned char sector_buffer[BYTES_PER_SECTOR];
catalog_file=fts>>16;
catalog_track=(fts>>8)&0xff;
catalog_sector=(fts&0xff);
/* Read in Catalog Sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
/* copy over filename */
for(x=0;x<strlen(new_name);x++) {
sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)+
FILE_NAME+x]=new_name[x]^0x80;
}
/* pad out the filename with spaces */
for(x=strlen(new_name);x<FILE_NAME_SIZE;x++) {
sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)+
FILE_NAME+x]=' '^0x80;
}
/* write back modified catalog sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=write(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"Error on I/O\n");
return -ERROR_CATALOG;
}
return 0;
}
/* undelete a file. fts=entry/track/sector */
/* FIXME: validate the new filename is valid */
static int dos33_undelete_file(int fd,int fts,char *new_name) {
int catalog_file,catalog_track,catalog_sector;
char replacement_char;
int result;
unsigned char sector_buffer[BYTES_PER_SECTOR];
catalog_file=fts>>16;
catalog_track=(fts>>8)&0xff;
catalog_sector=(fts&0xff);
/* Read in Catalog Sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
/* get the stored track value, and put it back */
/* FIXME: should walk file to see if T/s valild */
/* by setting the track value to FF which indicates deleted file */
sector_buffer[CATALOG_FILE_LIST+(catalog_file*CATALOG_ENTRY_SIZE)]=
sector_buffer[CATALOG_FILE_LIST+
(catalog_file*CATALOG_ENTRY_SIZE)+
FILE_NAME+29];
/* restore file name if possible */
replacement_char=0xa0;
if (strlen(new_name)>29) {
replacement_char=new_name[29]^0x80;
}
sector_buffer[CATALOG_FILE_LIST+(catalog_file*CATALOG_ENTRY_SIZE)+
FILE_NAME+29]=replacement_char;
/* write back modified catalog sector */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=write(fd,sector_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"Error on I/O\n");
return -ERROR_CATALOG;
}
return 0;
}
static int dos33_delete_file(unsigned char *vtoc,int fd,int fsl) {
int i;
int catalog_track,catalog_sector,catalog_entry;
int ts_track,ts_sector;
char file_type;
int result;
unsigned char catalog_buffer[BYTES_PER_SECTOR];
/* unpack file/track/sector info */
catalog_entry=fsl>>16;
catalog_track=(fsl>>8)&0xff;
catalog_sector=(fsl&0xff);
if (debug) {
fprintf(stderr,"DELETE: deleting file T=%d S=%d E=%d\n",
catalog_track,catalog_sector,catalog_entry);
}
/* Load in the catalog table for the file */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,catalog_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
file_type=catalog_buffer[CATALOG_FILE_LIST+
(catalog_entry*CATALOG_ENTRY_SIZE)
+FILE_TYPE];
if (file_type&0x80) {
fprintf(stderr,"File is locked! Unlock before deleting!\n");
exit(1);
}
/* get pointer to t/s list */
ts_track=catalog_buffer[CATALOG_FILE_LIST+
catalog_entry*CATALOG_ENTRY_SIZE+FILE_TS_LIST_T];
ts_sector=catalog_buffer[CATALOG_FILE_LIST+
catalog_entry*CATALOG_ENTRY_SIZE+FILE_TS_LIST_S];
keep_deleting:
if (debug) {
fprintf(stderr,"\tLoading T/S list T=%d S=%d\n",
ts_track,ts_sector);
}
/* load in the t/s list info */
lseek(fd,DISK_OFFSET(ts_track,ts_sector),SEEK_SET);
result=read(fd,catalog_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"delete: error reading catalog\n");
return -ERROR_FILE_READ;
}
/* Free each sector listed by t/s list */
for(i=0;i<TSL_MAX_NUMBER;i++) {
/* If t/s = 0/0 then no need to clear */
if ((catalog_buffer[TSL_LIST+2*i]==0) &&
(catalog_buffer[TSL_LIST+2*i+1]==0)) {
}
else {
if (debug) {
fprintf(stderr,"\tfreeing T=%d S=%d\n",
catalog_buffer[TSL_LIST+2*i],
catalog_buffer[TSL_LIST+2*i+1]);
}
dos33_free_sector(vtoc,fd,catalog_buffer[TSL_LIST+2*i],
catalog_buffer[TSL_LIST+2*i+1]);
}
}
/* free the t/s list */
dos33_free_sector(vtoc,fd,ts_track,ts_sector);
if (debug) {
fprintf(stderr,"\tfreeing T/S list T=%d S=%d\n",
ts_track,ts_sector);
}
/* Point to next t/s list */
ts_track=catalog_buffer[TSL_NEXT_TRACK];
ts_sector=catalog_buffer[TSL_NEXT_SECTOR];
if (debug) {
fprintf(stderr,"\tNext T/S list T=%d S=%d\n",
ts_track,ts_sector);
}
/* If more tsl lists, keep looping */
if ((ts_track==0x0) && (ts_sector==0x0)) {
}
else {
goto keep_deleting;
}
/* Erase file from catalog entry */
/* First reload proper catalog sector */
if (debug) {
fprintf(stderr,"\treloading T=%d S=%d\n",
catalog_track,catalog_sector);
}
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=read(fd,catalog_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"delete: error reading catalog\n");
return -ERROR_FILE_READ;
}
/* save track as last char of name, for undelete purposes */
catalog_buffer[CATALOG_FILE_LIST+(catalog_entry*CATALOG_ENTRY_SIZE)+
(FILE_NAME+FILE_NAME_SIZE-1)]=
catalog_buffer[CATALOG_FILE_LIST+(catalog_entry*CATALOG_ENTRY_SIZE)];
/* Actually delete the file */
/* by setting the track value to FF which indicates deleted file */
catalog_buffer[CATALOG_FILE_LIST+(catalog_entry*CATALOG_ENTRY_SIZE)]=
0xff;
/* re seek to catalog position and write out changes */
lseek(fd,DISK_OFFSET(catalog_track,catalog_sector),SEEK_SET);
result=write(fd,catalog_buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
fprintf(stderr,"delete: error writing catalog\n");
return -ERROR_CATALOG;
}
return 0;
}
/* ??? */
static int dos33_rename_hello(int fd, char *new_name) {
char buffer[BYTES_PER_SECTOR];
int i,result;
lseek(fd,DISK_OFFSET(1,9),SEEK_SET);
result=read(fd,buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_READ;
}
for(i=0;i<30;i++) {
if (i<strlen(new_name)) {
buffer[0x75+i]=new_name[i]|0x80;
}
else {
buffer[0x75+i]=' '|0x80;
}
}
lseek(fd,DISK_OFFSET(1,9),SEEK_SET);
result=write(fd,buffer,BYTES_PER_SECTOR);
if (result<BYTES_PER_SECTOR) {
return -ERROR_FILE_WRITE;
}
return 0;
}
static void display_help(char *name, int version_only) {
printf("\ndos33 version %s\n",VERSION);
printf("by Vince Weaver <vince@deater.net>\n");
printf("\n");
if (version_only) return;
printf("Usage: %s [-h] [-d] [-y] [-x] disk_image COMMAND [options]\n",name);
printf("\t-h : this help message\n");
printf("\t-d : enable debugging\n");
printf("\t-y : always answer yes for anying warning questions\n");
printf("\t-x : ignore errors (useful for making invalid filenames)\n");
printf("\n");
printf(" Where disk_image is a valid dos3.3 disk image\n"
" and COMMAND is one of the following:\n");
printf("\tCATALOG\n");
printf("\tLOAD apple_file <local_file>\n");
printf("\tSAVE type local_file <apple_file>\n");
printf("\tBSAVE [-a addr] [-l len] local_file <apple_file>\n");
printf("\tDELETE apple_file\n");
printf("\tLOCK apple_file\n");
printf("\tUNLOCK apple_file\n");
printf("\tRENAME apple_file_old apple_file_new\n");
printf("\tUNDELETE apple_file\n");
printf("\tDUMP\n");
printf("\tHELLO apple_file\n");
#if 0
printf("\tINIT\n");
printf("\tCOPY\n");
#endif
printf("\n");
return;
}
#define COMMAND_LOAD 0
#define COMMAND_SAVE 1
#define COMMAND_CATALOG 2
#define COMMAND_DELETE 3
#define COMMAND_UNDELETE 4
#define COMMAND_LOCK 5
#define COMMAND_UNLOCK 6
#define COMMAND_INIT 7
#define COMMAND_RENAME 8
#define COMMAND_COPY 9
#define COMMAND_DUMP 10
#define COMMAND_HELLO 11
#define COMMAND_BSAVE 12
#define COMMAND_BLOAD 13
#define COMMAND_SHOWFREE 14
#define COMMAND_RAW_WRITE 15
#define MAX_COMMAND 15
#define COMMAND_UNKNOWN 255
static struct command_type {
int type;
char name[32];
} commands[MAX_COMMAND] = {
{COMMAND_LOAD,"LOAD"},
{COMMAND_SAVE,"SAVE"},
{COMMAND_CATALOG,"CATALOG"},
{COMMAND_DELETE,"DELETE"},
{COMMAND_UNDELETE,"UNDELETE"},
{COMMAND_LOCK,"LOCK"},
{COMMAND_UNLOCK,"UNLOCK"},
{COMMAND_INIT,"INIT"},
{COMMAND_RENAME,"RENAME"},
{COMMAND_COPY,"COPY"},
{COMMAND_DUMP,"DUMP"},
{COMMAND_HELLO,"HELLO"},
{COMMAND_BSAVE,"BSAVE"},
{COMMAND_SHOWFREE,"SHOWFREE"},
{COMMAND_RAW_WRITE,"RAWWRITE"},
};
static int lookup_command(char *name) {
int which=COMMAND_UNKNOWN,i;
for(i=0;i<MAX_COMMAND;i++) {
if(!strncmp(name,commands[i].name,strlen(commands[i].name))) {
which=commands[i].type;
break;
}
}
return which;
}
static int truncate_filename(char *out, char *in) {
int truncated=0;
/* Truncate filename if too long */
if (strlen(in)>30) {
fprintf(stderr,"Warning! Truncating %s to 30 chars\n",in);
truncated=1;
}
strncpy(out,in,30);
out[30]='\0';
return truncated;
}
int main(int argc, char **argv) {
char image[BUFSIZ];
unsigned char type='b';
int dos_fd=0,i;
int command,catalog_entry;
char temp_string[BUFSIZ];
char apple_filename[31],new_filename[31];
char local_filename[BUFSIZ];
char *result_string;
int always_yes=0;
char *temp,*endptr;
int c;
int address=0, length=0;
unsigned char vtoc[BYTES_PER_SECTOR];
int retval=0;
/* Check command line arguments */
while ((c = getopt (argc, argv,"a:l:t:s:dhvxy"))!=-1) {
switch (c) {
case 'd':
fprintf(stderr,"DEBUG enabled\n");
debug=1;
break;
case 'a':
address=strtol(optarg,&endptr,0);
if (debug) fprintf(stderr,"Address=%d\n",address);
break;
case 'l':
length=strtol(optarg,&endptr,0);
if (debug) fprintf(stderr,"Length=%d\n",address);
break;
#if 0
case 't':
track=strtol(optarg,&endptr,0);
if (debug) fprintf(stderr,"Track=%d\n",address);
break;
case 's':
sector=strtol(optarg,&endptr,0);
if (debug) fprintf(stderr,"Sector=%d\n",address);
break;
#endif
case 'v':
display_help(argv[0],1);
return 0;
case 'h': display_help(argv[0],0);
return 0;
case 'x':
ignore_errors=1;
break;
case 'y':
always_yes=1;
break;
}
}
if (optind==argc) {
fprintf(stderr,"ERROR! Must specify disk image!\n\n");
return -ERROR_INVALID_PARAMATER;
}
/* get argument 1, which is image name */
strncpy(image,argv[optind],BUFSIZ-1);
dos_fd=open(image,O_RDWR);
if (dos_fd<0) {
fprintf(stderr,"Error opening disk_image: %s\n",image);
return -ERROR_FILE_NOT_FOUND;
}
retval=dos33_read_vtoc(dos_fd,vtoc);
if (retval<0) goto exit_and_close;
/* Move to next argument */
optind++;
if (optind==argc) {
fprintf(stderr,"ERROR! Must specify command!\n\n");
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
/* Grab command */
strncpy(temp_string,argv[optind],BUFSIZ-1);
/* Make command be uppercase */
for(i=0;i<strlen(temp_string);i++) {
temp_string[i]=toupper(temp_string[i]);
}
/* Move to next argument */
optind++;
command=lookup_command(temp_string);
switch(command) {
case COMMAND_UNKNOWN:
fprintf(stderr,"ERROR! Unknown command %s\n",temp_string);
fprintf(stderr,"\tTry \"%s -h\" for help.\n\n",argv[0]);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
break;
/* Load a file from disk image to local machine */
case COMMAND_LOAD:
/* check and make sure we have apple_filename */
if (argc==optind) {
fprintf(stderr,"Error! Need apple file_name\n");
fprintf(stderr,"%s %s LOAD apple_filename\n",
argv[0],image);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
truncate_filename(apple_filename,argv[optind]);
if (debug) printf("\tAhpple filename: %s\n",apple_filename);
/* get output filename */
optind++;
if (argc>optind) {
if (debug) printf("Using %s for filename\n",
local_filename);
strncpy(local_filename,argv[optind],BUFSIZ-1);
}
else {
if (debug) printf("Using %s for filename\n",
apple_filename);
strncpy(local_filename,apple_filename,31);
}
if (debug) printf("\tOutput filename: %s\n",local_filename);
/* get the entry/track/sector for file */
catalog_entry=dos33_check_file_exists(dos_fd,
apple_filename,
DOS33_FILE_NORMAL);
if (catalog_entry<0) {
fprintf(stderr,"Error! %s not found!\n",
apple_filename);
retval=catalog_entry;
goto exit_and_close;
}
retval=dos33_load_file(dos_fd,catalog_entry,local_filename);
break;
case COMMAND_CATALOG:
retval=dos33_read_vtoc(dos_fd,vtoc);
if (retval<0) return retval;
dos33_catalog(dos_fd,vtoc);
break;
case COMMAND_SAVE:
/* argv3 == type == A,B,T,I,N,L etc */
/* argv4 == name of local file */
/* argv5 == optional name of file on disk image */
if (argc==optind) {
fprintf(stderr,"Error! Need type and file_name\n");
fprintf(stderr,"%s %s SAVE type "
"file_name apple_filename\n\n",
argv[0],image);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
type=argv[optind][0];
optind++;
case COMMAND_BSAVE:
if (debug) printf("\ttype=%c\n",type);
if (argc==optind) {
fprintf(stderr,"Error! Need file_name\n");
if (command==COMMAND_BSAVE) {
fprintf(stderr,"%s %s BSAVE "
"file_name apple_filename\n\n",
argv[0],image);
}
else {
fprintf(stderr,"%s %s SAVE type "
"file_name apple_filename\n\n",
argv[0],image);
}
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
strncpy(local_filename,argv[optind],BUFSIZ-1);
optind++;
if (debug) printf("\tLocal filename: %s\n",local_filename);
if (argc>optind) {
/* apple filename specified */
truncate_filename(apple_filename,argv[optind]);
}
else {
/* If no filename specified for apple name */
/* Then use the input name. Note, we strip */
/* everything up to the last slash so useless */
/* path info isn't used */
temp=local_filename+(strlen(local_filename)-1);
while(temp!=local_filename) {
temp--;
if (*temp == '/') {
temp++;
break;
}
}
truncate_filename(apple_filename,temp);
}
if (debug) printf("\tApple filename: %s\n",apple_filename);
catalog_entry=dos33_check_file_exists(dos_fd,apple_filename,
DOS33_FILE_NORMAL);
if (catalog_entry>=0) {
fprintf(stderr,"Warning! %s exists!\n",apple_filename);
if (!always_yes) {
printf("Over-write (y/n)?");
result_string=fgets(temp_string,BUFSIZ,stdin);
if ((result_string==NULL) || (temp_string[0]!='y')) {
printf("Exiting early...\n");
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
}
fprintf(stderr,"Deleting previous version...\n");
dos33_delete_file(vtoc,dos_fd,catalog_entry);
}
if (command==COMMAND_SAVE) {
retval=dos33_add_file(vtoc,dos_fd,type,
ADD_RAW, address, length,
local_filename,apple_filename);
}
else {
retval=dos33_add_file(vtoc,dos_fd,type,
ADD_BINARY, address, length,
local_filename,apple_filename);
}
break;
case COMMAND_RAW_WRITE:
fprintf(stderr,"ERROR! Not implemented!\n\n");
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
break;
case COMMAND_DELETE:
if (argc==optind) {
fprintf(stderr,"Error! Need file_name\n");
fprintf(stderr,"%s %s DELETE apple_filename\n",
argv[0],image);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
truncate_filename(apple_filename,argv[optind]);
catalog_entry=dos33_check_file_exists(dos_fd,
apple_filename,
DOS33_FILE_NORMAL);
if (catalog_entry<0) {
fprintf(stderr, "Error! File %s does not exist\n",
apple_filename);
retval=catalog_entry;
goto exit_and_close;
}
retval=dos33_delete_file(vtoc,dos_fd,catalog_entry);
break;
case COMMAND_DUMP:
printf("Dumping %s!\n",image);
dos33_dump(vtoc,dos_fd);
break;
case COMMAND_SHOWFREE:
printf("Showing Free %s!\n",image);
dos33_showfree(vtoc,dos_fd);
break;
case COMMAND_LOCK:
case COMMAND_UNLOCK:
/* check and make sure we have apple_filename */
if (argc==optind) {
fprintf(stderr,"Error! Need apple file_name\n");
fprintf(stderr,"%s %s %s apple_filename\n",
argv[0],image,temp_string);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
truncate_filename(apple_filename,argv[optind]);
/* get the entry/track/sector for file */
catalog_entry=dos33_check_file_exists(dos_fd,
apple_filename,
DOS33_FILE_NORMAL);
if (catalog_entry<0) {
fprintf(stderr,"Error! %s not found!\n",
apple_filename);
retval=catalog_entry;
goto exit_and_close;
}
retval=dos33_lock_file(dos_fd,catalog_entry,command==COMMAND_LOCK);
break;
case COMMAND_RENAME:
/* check and make sure we have apple_filename */
if (argc==optind) {
fprintf(stderr,"Error! Need two filenames\n");
fprintf(stderr,"%s %s RENAME apple_filename_old "
"apple_filename_new\n",
argv[0],image);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
/* Truncate filename if too long */
truncate_filename(apple_filename,argv[optind]);
optind++;
if (argc==optind) {
fprintf(stderr,"Error! Need two filenames\n");
fprintf(stderr,"%s %s RENAME apple_filename_old "
"apple_filename_new\n",
argv[0],image);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
truncate_filename(new_filename,argv[optind]);
/* get the entry/track/sector for file */
catalog_entry=dos33_check_file_exists(dos_fd,
apple_filename,
DOS33_FILE_NORMAL);
if (catalog_entry<0) {
fprintf(stderr,"Error! %s not found!\n",
apple_filename);
retval=catalog_entry;
goto exit_and_close;
}
dos33_rename_file(dos_fd,catalog_entry,new_filename);
break;
case COMMAND_UNDELETE:
/* check and make sure we have apple_filename */
if (argc==optind) {
fprintf(stderr,"Error! Need apple file_name\n");
fprintf(stderr,"%s %s UNDELETE apple_filename\n\n",
argv[0],image);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
/* Truncate filename if too long */
/* what to do about last char ? */
truncate_filename(apple_filename,argv[optind]);
/* get the entry/track/sector for file */
catalog_entry=dos33_check_file_exists(dos_fd,
apple_filename,
DOS33_FILE_DELETED);
if (catalog_entry<0) {
fprintf(stderr,"Error! %s not found!\n",
apple_filename);
retval=catalog_entry;
goto exit_and_close;
}
retval=dos33_undelete_file(dos_fd,catalog_entry,apple_filename);
break;
case COMMAND_HELLO:
if (argc==optind) {
fprintf(stderr,"Error! Need file_name\n");
fprintf(stderr,"%s %s HELLO apple_filename\n\n",
argv[0],image);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
truncate_filename(apple_filename,argv[optind]);
catalog_entry=dos33_check_file_exists(dos_fd,
apple_filename,
DOS33_FILE_NORMAL);
if (catalog_entry<0) {
fprintf(stderr,
"Warning! File %s does not exist\n",
apple_filename);
retval=catalog_entry;
}
dos33_rename_hello(dos_fd,apple_filename);
break;
case COMMAND_INIT:
/* use common code from mkdos33fs? */
case COMMAND_COPY:
/* use temp file? Walking a sector at a time seems a pain */
default:
fprintf(stderr,"Sorry, unsupported command %s\n\n",temp_string);
retval=-ERROR_INVALID_PARAMATER;
goto exit_and_close;
}
exit_and_close:
close(dos_fd);
return retval;
}
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