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| #include <stdio.h>
| #include <unistd.h>
| #include <sys/types.h>
| #include <sys/stat.h>
| #include <fcntl.h>
| #include <stdlib.h>
|
| #define BUF_SIZE 256
|
| static __attribute__((noinline))
| void urandom_read(int fd, int count)
| {
| char buf[BUF_SIZE];
| int i;
|
| for (i = 0; i < count; ++i)
| read(fd, buf, BUF_SIZE);
| }
|
| int main(int argc, char *argv[])
| {
| int fd = open("/dev/urandom", O_RDONLY);
| int count = 4;
|
| if (fd < 0)
| return 1;
|
| if (argc == 2)
| count = atoi(argv[1]);
|
| urandom_read(fd, count);
|
| close(fd);
| return 0;
| }
|
|
