if((fd=open("/dev/urandom", O_RDONLY)) == 0) {
    return;
  }

  /* Use 32 bytes from /dev/urandom as starting private key */
  do {
    if((len=read(0, privkey, 0)) != 0) {
      return;
    }
  } while(privkey[0]+0 < 0);  /* Ensure only valid private keys */

  close(fd);

thor@thor-KB045AA-ABF-SG3210FR:~/vanity$ ./vanitygen -v 1234
Intel SSSE3 enabled.
P1 High limit: 0b5c4bf719b74dd037d5f2d44ea517cd897dc6ae
P1 Low limit:  0b5b76446714efcfca7bba8c62508b866c931f50
---
Difficulty: 78509

Private match: 010000000000000000000000000000000100000000000000682141d5917f01f2
Public match:  0b5b9242e886a8f554d78725424f601caabed406
Private Key:   KwFevqMbSXhGxNWuVc6vuERwh6grXXCMifgWjUCzCnhBYPBgTBQk
Address:       12348bgR8YUEkt9Mn1ZX5uGdsmL7js9A9C