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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
29 * All Rights Reserved
30 *
31 * Portions of this source code were derived from Berkeley
32 * 4.3 BSD under license from the regents of the University of
33 * California.
34 */
35
36 #pragma ident "%Z%%M% %I% %E% SMI"
37
38 #include <sys/feature_tests.h>
39
40 #if !defined(_LP64) && _FILE_OFFSET_BITS == 64
41 #define mkstemp mkstemp64
42 #define mkstemps mkstemps64
43 #define libc_mkstemps libc_mkstemps64 /* prefer unique statics */
44 #pragma weak _mkstemp64 = mkstemp64
45 #else
46 #pragma weak _mkstemp = mkstemp
47 #endif
48
49 #include "lint.h"
50 #include <sys/fcntl.h>
51 #include <stdlib.h>
52 #include <string.h>
53 #include <errno.h>
54 #include <alloca.h>
55 #include <sys/types.h>
56 #include <sys/stat.h>
57 #include <fcntl.h>
58
59 extern char *libc_mktemps(char *, int);
60
61 static int
libc_mkstemps(char * as,int slen)62 libc_mkstemps(char *as, int slen)
63 {
64 int fd;
65 int len;
66 char *tstr, *str, *mkret;
67
68 if (as == NULL || *as == NULL)
69 return (-1);
70
71 len = (int)strlen(as);
72 tstr = alloca(len + 1);
73 (void) strcpy(tstr, as);
74
75 if (slen < 0 || slen >= len)
76 return (-1);
77
78 str = tstr + (len - 1 - slen);
79
80 /*
81 * The following for() loop is doing work. mktemp() will generate
82 * a different name each time through the loop. So if the first
83 * name is used then keep trying until you find a free filename.
84 */
85
86 for (;;) {
87 if (*str == 'X') { /* If no trailing X's don't call mktemp. */
88 mkret = libc_mktemps(as, slen);
89 if (*mkret == '\0') {
90 return (-1);
91 }
92 }
93 #if _FILE_OFFSET_BITS == 64
94 if ((fd = open64(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) {
95 return (fd);
96 }
97 #else
98 if ((fd = open(as, O_CREAT|O_EXCL|O_RDWR, 0600)) != -1) {
99 return (fd);
100 }
101 #endif /* _FILE_OFFSET_BITS == 64 */
102
103 /*
104 * If the error condition is other than EEXIST or if the
105 * file exists and there are no X's in the string
106 * return -1.
107 */
108
109 if ((errno != EEXIST) || (*str != 'X')) {
110 return (-1);
111 }
112 (void) strcpy(as, tstr);
113 }
114 }
115
116 int
mkstemp(char * as)117 mkstemp(char *as)
118 {
119 return (libc_mkstemps(as, 0));
120 }
121
122 int
mkstemps(char * as,int slen)123 mkstemps(char *as, int slen)
124 {
125 return (libc_mkstemps(as, slen));
126 }
127