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dos33fsprogs
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utils: mkdos33fs: fix embarassing bug 

was overwriting VTOC when copying DOS over
This commit is contained in:
Vince Weaver 2022-07-26 14:58:34 -04:00
parent 963f9f0586
commit 046342a81c
1 changed files with 11 additions and 15 deletions
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26
utils/dos33fs-utils/mkdos33fs.c
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@ -244,8 +244,8 @@ int main(int argc, char **argv) {
lseek(fd,0,SEEK_SET);
/* copy first 3 sectors */
for(i=0;i<3*(num_sectors);i++) {
result=read(dos_fd,vtoc_buffer,sector_size);
result=write(fd,vtoc_buffer,sector_size);
result=read(dos_fd,sector_buffer,sector_size);
result=write(fd,sector_buffer,sector_size);
}
close(dos_fd);
@ -253,26 +253,22 @@ int main(int argc, char **argv) {
/* Track 1 sector 9 */
lseek(fd,((1*num_sectors)+9)*sector_size,SEEK_SET);
result=read(fd,vtoc_buffer,sector_size);
result=read(fd,sector_buffer,sector_size);
/* filename begins at offset 75 */
for(i=0;i<30;i++) {
vtoc_buffer[0x75+i]=boot_filename[i]|0x80;
sector_buffer[0x75+i]=boot_filename[i]|0x80;
}
lseek(fd,((1*num_sectors)+9)*sector_size,SEEK_SET);
result=write(fd,vtoc_buffer,sector_size);
result=write(fd,sector_buffer,sector_size);
/* if copying dos reserve tracks 1 and 2 as well */
vtoc_buffer[VTOC_FREE_BITMAPS+4]=0x00;
vtoc_buffer[VTOC_FREE_BITMAPS+5]=0x00;
vtoc_buffer[VTOC_FREE_BITMAPS+6]=0x00;
vtoc_buffer[VTOC_FREE_BITMAPS+7]=0x00;
vtoc_buffer[VTOC_FREE_BITMAPS+8]=0x00;
vtoc_buffer[VTOC_FREE_BITMAPS+9]=0x00;
vtoc_buffer[VTOC_FREE_BITMAPS+10]=0x00;
vtoc_buffer[VTOC_FREE_BITMAPS+11]=0x00;
for(i=0;i<num_sectors;i++) {
dos33_vtoc_reserve_sector(vtoc_buffer, 1, i);
dos33_vtoc_reserve_sector(vtoc_buffer, 2, i);
}
/* FIXME: free some room as DOS doesn't use all */
/* of track 2*/
}