00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
142 lines
3.2 KiB
C
142 lines
3.2 KiB
C
/* $NetBSD: genrandom.c,v 1.7 2014/12/10 04:37:54 christos Exp $ */
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/*
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* Copyright (C) 2004, 2005, 2007, 2009, 2010, 2012, 2014 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2000-2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* Id: genrandom.c,v 1.7 2010/05/17 23:51:04 tbox Exp */
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/*! \file */
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#include <config.h>
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#include <isc/commandline.h>
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#include <isc/print.h>
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#include <isc/stdlib.h>
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#include <isc/util.h>
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#include <stdio.h>
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#include <string.h>
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const char *program = "genrandom";
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ISC_PLATFORM_NORETURN_PRE static void
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usage(void) ISC_PLATFORM_NORETURN_POST;
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static void
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usage(void) {
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fprintf(stderr, "usage: %s [-n 2..9] k file\n", program);
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exit(1);
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}
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static void
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generate(char *filename, unsigned int bytes) {
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FILE *fp;
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fp = fopen(filename, "w");
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if (fp == NULL) {
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printf("failed to open %s\n", filename);
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exit(1);
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}
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while (bytes > 0) {
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#ifndef HAVE_ARC4RANDOM
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unsigned short int x = (rand() & 0xFFFF);
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#else
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unsigned short int x = (arc4random() & 0xFFFF);
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#endif
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unsigned char c = x & 0xFF;
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if (putc(c, fp) == EOF) {
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printf("error writing to %s\n", filename);
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exit(1);
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}
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c = x >> 8;
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if (putc(c, fp) == EOF) {
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printf("error writing to %s\n", filename);
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exit(1);
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}
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bytes -= 2;
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}
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fclose(fp);
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}
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int
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main(int argc, char **argv) {
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unsigned int bytes;
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unsigned int k;
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char *endp;
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int c, i, n = 1;
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size_t len;
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char *name;
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isc_commandline_errprint = ISC_FALSE;
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while ((c = isc_commandline_parse(argc, argv, "hn:")) != EOF) {
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switch (c) {
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case 'n':
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n = strtol(isc_commandline_argument, &endp, 10);
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if ((*endp != 0) || (n <= 1) || (n > 9))
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usage();
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break;
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case '?':
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if (isc_commandline_option != '?')
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fprintf(stderr, "%s: invalid argument -%c\n",
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program, isc_commandline_option);
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/* FALLTHROUGH */
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case 'h':
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usage();
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default:
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fprintf(stderr, "%s: unhandled option -%c\n",
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program, isc_commandline_option);
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exit(1);
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}
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}
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if (isc_commandline_index + 2 != argc)
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usage();
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k = strtoul(argv[isc_commandline_index++], &endp, 10);
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if (*endp != 0)
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usage();
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bytes = k << 10;
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#ifndef HAVE_ARC4RANDOM
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srand(0x12345678);
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#endif
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if (n == 1) {
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generate(argv[isc_commandline_index], bytes);
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return (0);
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}
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len = strlen(argv[isc_commandline_index]);
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INSIST((len + 2) > len);
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len += 2;
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name = (char *) malloc(len);
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if (name == NULL) {
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perror("malloc");
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exit(1);
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}
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for (i = 1; i <= n; i++) {
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snprintf(name, len, "%s%d", argv[isc_commandline_index], i);
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generate(name, bytes);
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}
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free(name);
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return (0);
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}
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