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8efc0c15 | 1 | /* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */ |
2 | /* Changes: Removed mktemp */ | |
3 | ||
4 | /* | |
5 | * Copyright (c) 1987, 1993 | |
6 | * The Regents of the University of California. 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 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
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 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | */ | |
36 | ||
0b65b628 | 37 | #include "includes.h" |
beb43d31 | 38 | |
39 | #ifndef HAVE_MKDTEMP | |
40 | ||
8efc0c15 | 41 | #if defined(LIBC_SCCS) && !defined(lint) |
42 | static char rcsid[] = "$OpenBSD: mktemp.c,v 1.13 1998/06/30 23:03:13 deraadt Exp $"; | |
43 | #endif /* LIBC_SCCS and not lint */ | |
44 | ||
4cca272e | 45 | static int _gettemp(char *, int *, int, int); |
8efc0c15 | 46 | |
47 | int | |
48 | mkstemps(path, slen) | |
49 | char *path; | |
50 | int slen; | |
51 | { | |
52 | int fd; | |
53 | ||
54 | return (_gettemp(path, &fd, 0, slen) ? fd : -1); | |
55 | } | |
56 | ||
57 | int | |
58 | mkstemp(path) | |
59 | char *path; | |
60 | { | |
61 | int fd; | |
62 | ||
63 | return (_gettemp(path, &fd, 0, 0) ? fd : -1); | |
64 | } | |
65 | ||
66 | char * | |
67 | mkdtemp(path) | |
68 | char *path; | |
69 | { | |
70 | return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL); | |
71 | } | |
72 | ||
73 | static int | |
74 | _gettemp(path, doopen, domkdir, slen) | |
75 | char *path; | |
76 | register int *doopen; | |
77 | int domkdir; | |
78 | int slen; | |
79 | { | |
80 | register char *start, *trv, *suffp; | |
81 | struct stat sbuf; | |
82 | int pid, rval; | |
83 | ||
84 | if (doopen && domkdir) { | |
85 | errno = EINVAL; | |
86 | return(0); | |
87 | } | |
88 | ||
89 | for (trv = path; *trv; ++trv) | |
90 | ; | |
91 | trv -= slen; | |
92 | suffp = trv; | |
93 | --trv; | |
94 | if (trv < path) { | |
95 | errno = EINVAL; | |
96 | return (0); | |
97 | } | |
98 | pid = getpid(); | |
99 | while (*trv == 'X' && pid != 0) { | |
100 | *trv-- = (pid % 10) + '0'; | |
101 | pid /= 10; | |
102 | } | |
103 | while (*trv == 'X') { | |
104 | char c; | |
105 | ||
106 | pid = (arc4random() & 0xffff) % (26+26); | |
107 | if (pid < 26) | |
108 | c = pid + 'A'; | |
109 | else | |
110 | c = (pid - 26) + 'a'; | |
111 | *trv-- = c; | |
112 | } | |
113 | start = trv + 1; | |
114 | ||
115 | /* | |
116 | * check the target directory; if you have six X's and it | |
117 | * doesn't exist this runs for a *very* long time. | |
118 | */ | |
119 | if (doopen || domkdir) { | |
120 | for (;; --trv) { | |
121 | if (trv <= path) | |
122 | break; | |
123 | if (*trv == '/') { | |
124 | *trv = '\0'; | |
125 | rval = stat(path, &sbuf); | |
126 | *trv = '/'; | |
127 | if (rval != 0) | |
128 | return(0); | |
129 | if (!S_ISDIR(sbuf.st_mode)) { | |
130 | errno = ENOTDIR; | |
131 | return(0); | |
132 | } | |
133 | break; | |
134 | } | |
135 | } | |
136 | } | |
137 | ||
138 | for (;;) { | |
139 | if (doopen) { | |
140 | if ((*doopen = | |
141 | open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) | |
142 | return(1); | |
143 | if (errno != EEXIST) | |
144 | return(0); | |
145 | } else if (domkdir) { | |
146 | if (mkdir(path, 0700) == 0) | |
147 | return(1); | |
148 | if (errno != EEXIST) | |
149 | return(0); | |
150 | } else if (lstat(path, &sbuf)) | |
151 | return(errno == ENOENT ? 1 : 0); | |
152 | ||
153 | /* tricky little algorithm for backward compatibility */ | |
154 | for (trv = start;;) { | |
155 | if (!*trv) | |
156 | return (0); | |
157 | if (*trv == 'Z') { | |
158 | if (trv == suffp) | |
159 | return (0); | |
160 | *trv++ = 'a'; | |
161 | } else { | |
162 | if (isdigit(*trv)) | |
163 | *trv = 'a'; | |
164 | else if (*trv == 'z') /* inc from z to A */ | |
165 | *trv = 'A'; | |
166 | else { | |
167 | if (trv == suffp) | |
168 | return (0); | |
169 | ++*trv; | |
170 | } | |
171 | break; | |
172 | } | |
173 | } | |
174 | } | |
175 | /*NOTREACHED*/ | |
176 | } | |
fb723d82 | 177 | |
178 | #endif /* !HAVE_MKDTEMP */ |