src/lib/rand.c

	rand.c revision fc7474aac307dac6af0877edbdc026d9b451c90c
/* Copyright (c) 2014 Dovecot authors, see the included COPYING file */

/* Wrap srand() so that we can reproduce fuzzed tests */

#include "lib.h"
#include <stdlib.h>

static int seeded = 0;
static unsigned int seed;
static char const *env_seed;

int rand_get_seed_count(void)
{
    return seeded;
}
unsigned int rand_get_last_seed(void)
{
    i_assert(seeded > 0);
    return seed;
}
void rand_set_seed(unsigned int s)
{
    if (seeded == 0) {
        env_seed = getenv("DOVECOT_SRAND");
        if (env_seed != NULL)
            seed = strtoul(env_seed, NULL, 0);
    }
    seeded++;
    if (env_seed == NULL)
        seed = s;

    srand(seed);
}