/* Copyright (C) 1992, 1996, 1999, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <string.h> #include <stdlib.h> #include <time.h> #include <unistd.h> char * strfry (char *string) { static int init; static struct random_data rdata; size_t len, i; if (!init) { static char state[32]; rdata.state = NULL; __initstate_r (time ((time_t *) NULL) ^ getpid (), state, sizeof (state), &rdata); init = 1; } len = strlen (string); for (i = 0; i < len; ++i) { int32_t j; char c; __random_r (&rdata, &j); j %= len; c = string[i]; string[i] = string[j]; string[j] = c; } return string; }