1 /* $NetBSD: mkstemp.c,v 1.1.1.1 2011/04/13 18:15:42 elric Exp $ */
2
3 /*
4 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <config.h>
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
47 #include <krb5/roken.h>
48
49 #ifndef HAVE_MKSTEMP
50
51 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
mkstemp(char * template)52 mkstemp(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