1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 1989 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R3 1.11 */
28
29 /* Copyright (c) 1984 AT&T */
30 /* All Rights Reserved */
31
32
33 /*LINTLIBRARY*/
34 /****************************************************************
35 * Routine expects a string of length at least 6, with
36 * six trailing 'X's. These will be overlaid with a
37 * letter and the last (5) digigts of the proccess ID.
38 * If every letter (a thru z) thus inserted leads to
39 * an existing file name, your string is shortened to
40 * length zero upon return (first character set to '\0').
41 ***************************************************************/
42 #include <sys/types.h>
43 #include <sys/stat.h>
44
45 #define XCNT 6
46
47 extern int strlen(), access(), getpid();
48
49 char *
mktemp(as)50 mktemp(as)
51 char *as;
52 {
53 register char *s=as;
54 register unsigned pid;
55 register unsigned xcnt=0; /* keeps track of number of X's seen */
56 struct stat buf;
57
58 pid = getpid();
59 s += strlen(as); /* point at the terminal null */
60 while(*--s == 'X' && ++xcnt <= XCNT) {
61 *s = (pid%10) + '0';
62 pid /= 10;
63 }
64 if(*++s) { /* maybe there were no 'X's */
65 *s = 'a';
66 while (stat(as, &buf) == 0) {
67 if(++*s > 'z') {
68 *as = '\0';
69 break;
70 }
71 }
72 } else
73 if (stat(as, &buf) == 0)
74 *as = '\0';
75 return(as);
76 }
77