1*d3273b5bSchristos /* $NetBSD: mkstemp.c,v 1.2 2017/01/28 21:31:50 christos Exp $ */
2ca1c9b0cSelric
3ca1c9b0cSelric /*
4ca1c9b0cSelric * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
5ca1c9b0cSelric * (Royal Institute of Technology, Stockholm, Sweden).
6ca1c9b0cSelric * All rights reserved.
7ca1c9b0cSelric *
8ca1c9b0cSelric * Redistribution and use in source and binary forms, with or without
9ca1c9b0cSelric * modification, are permitted provided that the following conditions
10ca1c9b0cSelric * are met:
11ca1c9b0cSelric *
12ca1c9b0cSelric * 1. Redistributions of source code must retain the above copyright
13ca1c9b0cSelric * notice, this list of conditions and the following disclaimer.
14ca1c9b0cSelric *
15ca1c9b0cSelric * 2. Redistributions in binary form must reproduce the above copyright
16ca1c9b0cSelric * notice, this list of conditions and the following disclaimer in the
17ca1c9b0cSelric * documentation and/or other materials provided with the distribution.
18ca1c9b0cSelric *
19ca1c9b0cSelric * 3. Neither the name of the Institute nor the names of its contributors
20ca1c9b0cSelric * may be used to endorse or promote products derived from this software
21ca1c9b0cSelric * without specific prior written permission.
22ca1c9b0cSelric *
23ca1c9b0cSelric * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24ca1c9b0cSelric * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25ca1c9b0cSelric * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26ca1c9b0cSelric * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27ca1c9b0cSelric * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28ca1c9b0cSelric * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29ca1c9b0cSelric * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30ca1c9b0cSelric * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31ca1c9b0cSelric * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32ca1c9b0cSelric * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33ca1c9b0cSelric * SUCH DAMAGE.
34ca1c9b0cSelric */
35ca1c9b0cSelric
36ca1c9b0cSelric #include <config.h>
37ca1c9b0cSelric
38ca1c9b0cSelric #include <string.h>
39ca1c9b0cSelric #ifdef HAVE_UNISTD_H
40ca1c9b0cSelric #include <unistd.h>
41ca1c9b0cSelric #endif
42ca1c9b0cSelric #ifdef HAVE_FCNTL_H
43ca1c9b0cSelric #include <fcntl.h>
44ca1c9b0cSelric #endif
45ca1c9b0cSelric #include <errno.h>
46ca1c9b0cSelric
47ca1c9b0cSelric #include <krb5/roken.h>
48ca1c9b0cSelric
49ca1c9b0cSelric #ifndef HAVE_MKSTEMP
50ca1c9b0cSelric
51ca1c9b0cSelric ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
mkstemp(char * template)52ca1c9b0cSelric mkstemp(char *template)
53ca1c9b0cSelric {
54ca1c9b0cSelric int start, i;
55ca1c9b0cSelric pid_t val;
56ca1c9b0cSelric val = getpid();
57ca1c9b0cSelric start = strlen(template) - 1;
58ca1c9b0cSelric while(template[start] == 'X') {
59ca1c9b0cSelric template[start] = '0' + val % 10;
60ca1c9b0cSelric val /= 10;
61ca1c9b0cSelric start--;
62ca1c9b0cSelric }
63ca1c9b0cSelric
64ca1c9b0cSelric do{
65ca1c9b0cSelric int fd;
66ca1c9b0cSelric fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600);
67ca1c9b0cSelric if(fd >= 0 || errno != EEXIST)
68ca1c9b0cSelric return fd;
69ca1c9b0cSelric i = start + 1;
70ca1c9b0cSelric do{
71ca1c9b0cSelric if(template[i] == 0)
72ca1c9b0cSelric return -1;
73ca1c9b0cSelric template[i]++;
74ca1c9b0cSelric if(template[i] == '9' + 1)
75ca1c9b0cSelric template[i] = 'a';
76ca1c9b0cSelric if(template[i] <= 'z')
77ca1c9b0cSelric break;
78ca1c9b0cSelric template[i] = 'a';
79ca1c9b0cSelric i++;
80ca1c9b0cSelric }while(1);
81ca1c9b0cSelric }while(1);
82ca1c9b0cSelric }
83ca1c9b0cSelric
84ca1c9b0cSelric #endif
85