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First version of tool for patching volume dir for ProDOS 2.5

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Bobbi Webber-Manners 2020-03-02 22:03:55 -05:00
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commit dea415c018
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/*
* Simple program to modify the volume directory (block 2) of a ProDOS
* volume to make the directory extensible to more than four blocks (51
* entries) when using ProDOS 2.5 or later. This program can also revert
* a volume with an extensible volume directory back to fixed-size directory
* provided the directory is still exactly 4 blocks in length.
*
* Bobbi
* March 2020
*/
#include <prodos.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
char buf[512];
char str[128]; /* Should be enough */
int main(int argc, char *argv[]) {
puts("ProDOS 2.5+ Volume Directory Patching Utility");
puts("---------------------------------------------");
fputs("\nEnter device number> ", stdout);
int dev;
scanf("%u", &dev);
BlockRec br;
br.blockDevNum = dev;
br.blockDataBuffer = buf;
br.blockNum = 2;
READ_BLOCK(&br);
int rc = toolerror();
if (rc) {
printf("Block read failed, err=%x\n", rc);
exit(255);
}
if ((buf[0x14] == 0) && (buf[0x15] == 0)) {
puts("Fixed-size (4 block, 51 entry) volume directory");
printf("Change to ProDOS 2.5+ extensible volume "
"directory ('yes' to confirm)?");
scanf("%s", str);
if (strcasecmp(str, "yes") == 0) {
buf[0x14] = 4;
buf[0x15] = 0;
WRITE_BLOCK(&br);
int rc = toolerror();
if (rc) {
printf("Block write failed, err=%x\n", rc);
exit(255);
}
puts("** Changed to extensible **");
} else
puts("No change made.");
} else {
printf("Extensible volume directory, currently %u blocks\n",
buf[0x14] + 256U * buf[0x15]);
if ((buf[0x14] == 4) && (buf[0x15] == 0)) {
printf("Revert to classic ProDOS fixed-size volume "
"directory ('yes' to confirm)?");
scanf("%s", str);
if (strcasecmp(str, "yes") == 0) {
buf[0x14] = 0;
buf[0x15] = 0;
WRITE_BLOCK(&br);
int rc = toolerror();
if (rc) {
printf("Block write failed, err=%x\n",
rc);
exit(255);
}
puts("** Changed to fixed-size **");
} else
puts("No change made.");
}
}
return 0;
}