dos33fsprogs/utils/prodos-utils/prodos_raw.c
2024-07-16 18:05:29 -04:00

180 lines
3.7 KiB
C

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "prodos.h"
/* usage: prodos_raw block file start count max*/
static void usage(char *exe_name) {
printf("Usage:\n");
printf("\t%s disk_image block file start count [max_block]\n\n",exe_name);
exit(1);
}
//static int dos33_sector_map[16]={
// 0, 7, 14, 6, 13, 5, 12, 4, 11, 3, 10, 2, 9, 1, 8, 15
//};
static int goto_prodos_block(int fd, int block, int offset) {
int result;
/* For now, assume prodos order */
// translated_sector=dos33_sector_map[sector%16];
result=lseek(fd,offset+(block*512),SEEK_SET);
// printf("going to: B=%d\n",block);
return result;
}
int main(int argc, char **argv) {
unsigned int block,start,count,total,max_block,filesize;
unsigned int check_max=0;
int disk_image_fd;
int file_fd;
unsigned char buffer[512];
int result,read_result;
struct stat statbuf;
unsigned char header[64];
int debug=1;
int interleave=PRODOS_INTERLEAVE_PRODOS,num_blocks,offset=0;
if (argc<6) {
usage(argv[0]);
}
/* usage: prodos_raw block file start count max*/
block=atoi(argv[2]);
start=atoi(argv[4]);
count=atoi(argv[5]);
if (argc>6) {
max_block=atoi(argv[6]);
check_max=1;
}
/* open disk image */
disk_image_fd=open(argv[1],O_RDWR);
if (disk_image_fd<0) {
fprintf(stderr,"Error opening disk image %s: %s\n",
argv[1],strerror(errno));
exit(1);
}
/* open file */
file_fd=open(argv[3],O_RDONLY);
if (file_fd<0) {
fprintf(stderr,"Error opening file %s: %s\n",
argv[3],strerror(errno));
exit(1);
}
/* check if 2img format */
result=read(disk_image_fd,header,64);
if (result<0) {
fprintf(stderr,"Error reading header\n");
exit(1);
}
result=read_2mg_header(header,&num_blocks,
&interleave,&offset,debug);
if (result<0) {
/* try figuring things out otherwise */
result=stat(argv[1], &statbuf);
num_blocks=statbuf.st_size/512;
if (num_blocks%512==0) num_blocks++;
}
/* check filesize using stat */
result=stat(argv[3], &statbuf);
if (result<0) {
fprintf(stderr,"Error stating %s: %s\n",
argv[3],strerror(errno));
exit(1);
}
filesize=statbuf.st_size;
if (count==0) {
count=(filesize/512);
if ((filesize%512)!=0) count++;
}
/* sanity check a bit */
/* max prodos image is 65535 */
if (block>65535) {
fprintf(stderr,"Warning! Unusual block number %d\n",block);
exit(1);
}
/* check if end too high */
if (block+count>num_blocks) {
fprintf(stderr,"Error! Last block %d beyond max image block %d\n",
block+count,num_blocks);
exit(1);
}
/* sanity check we aren't going above self-imposed max */
if (check_max) {
if (block+count>max_block) {
fprintf(stderr,"Error, %d exceeds max_block of %d\n",
block+count,max_block);
exit(1);
}
}
if (interleave!=PRODOS_INTERLEAVE_PRODOS) {
fprintf(stderr,"Error! Unsupported interleave!\n");
exit(1);
}
/* seek in source file if needed */
result=lseek(file_fd,(start*512),SEEK_SET);
if (result<0) {
fprintf(stderr,"Error skipping: %s\n",strerror(errno));
exit(1);
}
total=0;
/* write until out of space */
while(1) {
if (total>=count) break;
read_result=read(file_fd,buffer,512);
if (read_result<0) break; /* error */
if (read_result==0) break; /* done */
result=goto_prodos_block(disk_image_fd,block,offset);
if (result<0) {
fprintf(stderr,"Error seeking: %s\n",strerror(errno));
exit(1);
}
result=write(disk_image_fd,buffer,read_result);
if (result<0) {
fprintf(stderr,"Error writing image: %s\n",
strerror(errno));
break;
}
total++;
block++;
}
close(file_fd);
close(disk_image_fd);
fprintf(stderr,"Wrote %d blocks\n",total);
return 0;
}