1 /*
2 * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
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 #include <config.h>
35
36 #include <string.h>
37 #ifdef HAVE_UNISTD_H
38 #include <unistd.h>
39 #endif
40 #ifdef HAVE_FCNTL_H
41 #include <fcntl.h>
42 #endif
43 #include <errno.h>
44
45 #include <roken.h>
46
47 #ifndef HAVE_MKSTEMP
48
49 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
mkstemp(char * template)50 mkstemp(char *template)
51 {
52 int start, i;
53 pid_t val;
54 val = getpid();
55 start = strlen(template) - 1;
56 while(template[start] == 'X') {
57 template[start] = '0' + val % 10;
58 val /= 10;
59 start--;
60 }
61
62 do{
63 int fd;
64 fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600);
65 if(fd >= 0 || errno != EEXIST)
66 return fd;
67 i = start + 1;
68 do{
69 if(template[i] == 0)
70 return -1;
71 template[i]++;
72 if(template[i] == '9' + 1)
73 template[i] = 'a';
74 if(template[i] <= 'z')
75 break;
76 template[i] = 'a';
77 i++;
78 }while(1);
79 }while(1);
80 }
81
82 #endif
83