hackedteam/vector-default

/*
 * uxgen.c: Unix implementation of get_heavy_noise() from cmdgen.c.
 */

#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>

#include "putty.h"

char *get_random_data(int len)
{
    char *buf = snewn(len, char);
    int fd;
    int ngot, ret;

    fd = open("/dev/random", O_RDONLY);
    if (fd < 0) {
    sfree(buf);
    perror("puttygen: unable to open /dev/random");
    return NULL;
    }

    ngot = 0;
    while (ngot < len) {
    ret = read(fd, buf+ngot, len-ngot);
    if (ret < 0) {
        close(fd);
        perror("puttygen: unable to read /dev/random");
        return NULL;
    }
    ngot += ret;
    }

    close(fd);

    return buf;
}