1/*
2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifdef HAVE_CONFIG_H
35#include <config.h>
36#endif
37
38#include <string.h>
39#ifdef HAVE_UNISTD_H
40#include <unistd.h>
41#endif
42#ifdef HAVE_FCNTL_H
43#include <fcntl.h>
44#endif
45#include <errno.h>
46
47RCSID("$Id: mkstemp.c 14773 2005-04-12 11:29:18Z lha $");
48
49#ifndef HAVE_MKSTEMP
50
51int ROKEN_LIB_FUNCTION
52mkstemp(char *template)
53{
54    int start, i;
55    pid_t val;
56    val = getpid();
57    start = strlen(template) - 1;
58    while(template[start] == 'X') {
59	template[start] = '0' + val % 10;
60	val /= 10;
61	start--;
62    }
63
64    do{
65	int fd;
66	fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600);
67	if(fd >= 0 || errno != EEXIST)
68	    return fd;
69	i = start + 1;
70	do{
71	    if(template[i] == 0)
72		return -1;
73	    template[i]++;
74	    if(template[i] == '9' + 1)
75		template[i] = 'a';
76	    if(template[i] <= 'z')
77		break;
78	    template[i] = 'a';
79	    i++;
80	}while(1);
81    }while(1);
82}
83
84#endif
85