Random string generator.

randomstr.c

//Released under GNU GPL v3.

#include <stdio.h>

static const char alphanum[] =
"0123456789"
"!@#$%^&*"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz";

int stringLength = sizeof(alphanum) - 1;

FILE *fd_rand;

unsigned int hwrandom()
{
	int data;

	char *d = (char*)&data;

	int i;

	for(i=0; i<4; i++)
	{
		*d = fgetc(fd_rand);
		d++;
	}

	return data;
}

char genRandom()
{
    return alphanum[hwrandom() % stringLength];
}

int main()
{
	srand(time(0));

	fd_rand = fopen("/dev/urandom", "r");

	int i;
	int loop = hwrandom()%15+1;

	for(i=0; i<loop; i++)
    printf("%c", genRandom());
    return 0;

}