/* Copyright (C) 1999 artofcode LLC.  All rights reserved.
  
  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.

  This program 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
  General Public License for more details.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  59 Temple Place, Suite 330, Boston, MA, 02111-1307.

*/

/*$Id: gp_mktmp.c,v 1.2.6.1.2.1 2003/01/17 00:49:02 giles Exp $ */
/* Replacement for missing mktemp */
#include "stat_.h"
#include "string_.h"

/* This procedure simulates mktemp on platforms that don't provide it. */
char *
mktemp(char *fname)
{
    struct stat fst;
    int len = strlen(fname);
    char *end = fname + len - 6;
    
    if (len < 6 || strcmp(end, "XXXXXX"))
	return (char *)0;	/* invalid  */
    strcpy(end, "AA.AAA");

    while (stat(fname, &fst) == 0) {
	char *inc = fname + len - 1;

	while (*inc == 'Z' || *inc == '.') {
	    if (inc == end)
		return (char *)0;	/* failure */
	    if (*inc == 'Z')
		*inc = 'A';
	    --inc;
	}
	++*inc;
    }
    return fname;
}