/* * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009 * The President and Fellows of Harvard College. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <stdlib.h> #include <stdio.h> #include <string.h> #include "extern.h" static void randchar(char *c) { #if RAND_MAX != 0x7fffffff #error "This code assumes RAND_MAX is 0x7fffffff" #endif static long lbits = 0; static long lnum = 0; long bit; int ct = 0; *c = 0; while (ct < CHAR_BIT) { if (lnum==0) { lbits = random(); lnum = 31; } bit = lbits & 1; if (bit) { (*c) |= 1; } (*c) <<= 1; ct++; lbits >>= 1; lnum--; } } static void fillrand(void *p, size_t len) { size_t i; char *cp = p; for (i=0; i<len; i++) { randchar(&cp[i]); } } void * randptr(void) { void *x; fillrand(&x, sizeof(x)); return x; } int randint(void) { int x; fillrand(&x, sizeof(x)); return x; } off_t randoff(void) { off_t x; fillrand(&x, sizeof(x)); return x; } size_t randsize(void) { size_t x; fillrand(&x, sizeof(x)); return x; } static void usage(void) { printf("Usage: randcall [-f] [-c count] [-r seed] 2|3|4|all\n"); printf(" -f suppress forking\n"); printf(" -c set iteration count (default 100)\n"); printf(" -r set pseudorandom seed (default 0)\n"); exit(1); } int main(int argc, char *argv[]) { int count=100, seed = 0, dofork = 1; int an, i; for (i=1; i<argc; i++) { if (!strcmp(argv[i], "-f")) { dofork = 0; } else if (!strcmp(argv[i], "-c") && i<argc-1) { count = atoi(argv[++i]); } else if (!strcmp(argv[i], "-r") && i<argc-1) { seed = atoi(argv[++i]); } else if (argv[i][0] == '-') { usage(); } else { break; } } if (i != argc-1) { usage(); } if (!strcmp(argv[i], "all")) { an = 5; } else { an = atoi(argv[i]); if (an <2 || an > 4) { usage(); } } printf("Seed: %d Count: %d\n", seed, count); srandom(seed); trycalls(an, dofork, count); return 0; }