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 1993 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /* Copyright (c) 1984 AT&T */
28 /* All Rights Reserved */
29
30 #pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.1 */
31
32 /*LINTLIBRARY*/
33 #include <stdio.h>
34 #include <string.h>
35
36 #define max(A,B) (((A)<(B))?(B):(A))
37
38 extern char *malloc(), *getenv(), *mktemp();
39 extern int access();
40
41 static char *pcopy();
42 static char seed[4];
43
44 char *
tempnam(dir,pfx)45 tempnam(dir, pfx)
46 char *dir; /* use this directory please (if non-NULL) */
47 char *pfx; /* use this (if non-NULL) as filename prefix */
48 {
49 register char *p, *q, *tdir;
50 int x=0, y=0, z;
51
52 if (seed[0] == 0)
53 seed[0] = seed[1] = seed[2] = 'A';
54 z=strlen(P_tmpdir);
55 if((tdir = getenv("TMPDIR")) != NULL) {
56 x = strlen(tdir);
57 }
58 if(dir != NULL) {
59 y=strlen(dir);
60 }
61 if((p=malloc((unsigned)(max(max(x,y),z)+16))) == NULL)
62 return(NULL);
63 if(x > 0 && access(pcopy(p, tdir), 3) == 0)
64 goto OK;
65 if(y > 0 && access(pcopy(p, dir), 3) == 0)
66 goto OK;
67 if(access(pcopy(p, P_tmpdir), 3) == 0)
68 goto OK;
69 if(access(pcopy(p, "/tmp"), 3) != 0)
70 return(NULL);
71 OK:
72 (void)strcat(p, "/");
73 if(pfx) {
74 *(p+strlen(p)+5) = '\0';
75 (void)strncat(p, pfx, 5);
76 }
77 (void)strcat(p, seed);
78 (void)strcat(p, "XXXXXX");
79 q = seed;
80 while(*q == 'Z')
81 *q++ = 'A';
82 ++*q;
83 if(*mktemp(p) == '\0')
84 return(NULL);
85 return(p);
86 }
87
88 static char*
pcopy(space,arg)89 pcopy(space, arg)
90 char *space, *arg;
91 {
92 char *p;
93
94 if(arg) {
95 (void)strcpy(space, arg);
96 p = space-1+strlen(space);
97 if(*p == '/')
98 *p = '\0';
99 }
100 return(space);
101 }
102