mirror of
https://gitlab.isc.org/isc-projects/bind9
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77 lines
1.8 KiB
C
77 lines
1.8 KiB
C
/*
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* Copyright (C) 2004, 2005 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 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 1.13 2005/04/29 00:22:40 marka Exp $ */
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/*! \file */
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#include <config.h>
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#include <stdio.h>
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#include <time.h>
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#include <isc/stdlib.h>
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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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FILE *fp;
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if (argc != 3) {
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printf("usage: genrandom k file\n");
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exit(1);
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}
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k = strtoul(argv[1], &endp, 10);
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if (*endp != 0) {
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printf("usage: genrandom k file\n");
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exit(1);
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}
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bytes = k << 10;
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fp = fopen(argv[2], "w");
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if (fp == NULL) {
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printf("failed to open %s\n", argv[2]);
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exit(1);
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}
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#ifndef HAVE_ARC4RANDOM
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srand(0x12345678);
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#endif
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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 file\n");
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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 file\n");
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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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return (0);
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}
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