devkitPro

I tested it directly on the dsl hardware.

It's not necessary to open the file before. I tested it but it doesn't change anything.

I want to reduce the size of a file without copying and tried the following.

#include <nds.h>
#include <fat.h>
#include <stdio.h>
#include <unistd.h>

int main(void) {

fatInitDefault();
truncate("test.dat", 123);

while(1) {
swiWaitForVBlank();
}

return 0;
}

I also added -lfat in LIBS ...