[Solved] Low-level read file [closed]

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The function you’re looking for is called “read”. You have to pass it a buffer you’ve already allocated previously, however. Something like this ought to work:

if (fd) {
  char buffer[1024];
  int n = read(fd, buffer, 1024);

  /* ... */
}

after that call, n will contain the number of bytes read from the fd (or 0 for none or less than 0 if an error occured).

If you have raw ints in that file, you could then access them kinda like this:

int *ibuffer = (int*)buffer;

ibuffer is then an array of ints of length 1024/sizeof(int) containing the first n/sizeof(int) consecutive ints in fd. Strictly speaking this isn’t quite legal C, but then I haven’t seen an architecture lately where this wouldn’t have worked.

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solved Low-level read file [closed]