Filling szBufferState with random data is completely unnecessary,
initstate_r overwrites it anyway.
If you want to initialize randomdataState the same way srandom(seconds);
does, don't open /dev/urandom at all and just do:
static int buf[32];
memset (randomdataState, 0, sizeof (*randomdataState));
initstate_r (seconds, (char *) buf, 128, &randomdataState);
Jakub, I have tried to do what you propose but the following code is
throwing an error in execution time:
### prueba-3.c ##################################################
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
int bucle_random_r() {
int nRandom;
struct random_data *randomdataState;
static int buf[32];
time_t seconds;
extern void *memset (void *__s, int __c, size_t __n) __THROW;
memset(randomdataState, 0, sizeof(*randomdataState));
initstate_r(seconds, (char *) buf, 128, randomdataState);
random_r(randomdataState, &nRandom);
printf("%d\n", nRandom);
return 1;
}
int main(int argc, char ** argv) {
bucle_random_r();
return (0);
}
#################################################################
This is the result:
# gcc prueba-3.c -o 3prueba -Wall -pedantic -O0
#./3prueba
Segmentation fault
The "Segmentation fault" occurs when executing memset instruction. I
don't know why ...
