michael@0: /*
michael@0:  *  prng.c
michael@0:  *
michael@0:  *  Command-line pseudo-random number generator
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: #include <limits.h>
michael@0: #include <time.h>
michael@0: 
michael@0: #ifdef __OS2__
michael@0: #include <types.h>
michael@0: #include <process.h>
michael@0: #else
michael@0: #include <unistd.h>
michael@0: #endif
michael@0: 
michael@0: #include "bbs_rand.h"
michael@0: 
michael@0: int main(int argc, char *argv[])
michael@0: {
michael@0:   unsigned char *seed;
michael@0:   unsigned int   ix, num = 1;
michael@0:   pid_t          pid;
michael@0:   
michael@0:   if(argc > 1) {
michael@0:     num = atoi(argv[1]);
michael@0:     if(num <= 0) 
michael@0:       num = 1;
michael@0:   }
michael@0: 
michael@0:   pid = getpid();
michael@0:   srand(time(NULL) * (unsigned int)pid);
michael@0: 
michael@0:   /* Not a perfect seed, but not bad */
michael@0:   seed = malloc(bbs_seed_size);
michael@0:   for(ix = 0; ix < bbs_seed_size; ix++) {
michael@0:     seed[ix] = rand() % UCHAR_MAX;
michael@0:   }
michael@0: 
michael@0:   bbs_srand(seed, bbs_seed_size);
michael@0:   memset(seed, 0, bbs_seed_size);
michael@0:   free(seed);
michael@0: 
michael@0:   while(num-- > 0) {
michael@0:     ix = bbs_rand();
michael@0: 
michael@0:     printf("%u\n", ix);
michael@0:   }
michael@0: 
michael@0:   return 0;
michael@0: 
michael@0: }