gistfile1.txt

#include <assert.h>
#include <fcntl.h>

int main(int argc, int argv) {
  int in, out, n;
  char data[1024];
  char header[1];
  header[0] = 0x89;
  in = open("/tmp/corrupted.png", O_RDONLY);
  out = open("/tmp/corrupted2.png", O_CREAT|O_WRONLY);
  read(in, data, 1024);
  write(out, header, 1);
  write(out, data+3, 1021);
  while(n = read(in, data, 1024)) {
    write(out, data, n);
  }
  close(in);
  close(out);
  return 0;
};