tools/testing/selftests/bpf/urandom_read.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6 #include <stdlib.h>
   7
   8 #define BUF_SIZE 256
   9
  10 int main(int argc, char *argv[])
  11 {
  12         int fd = open("/dev/urandom", O_RDONLY);
  13         int i;
  14         char buf[BUF_SIZE];
  15         int count = 4;
  16
  17         if (fd < 0)
  18                 return 1;
  19
  20         if (argc == 2)
  21                 count = atoi(argv[1]);
  22
  23         for (i = 0; i < count; ++i)
  24                 read(fd, buf, BUF_SIZE);
  25
  26         close(fd);
  27         return 0;
  28 }