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8efc0c15 | 1 | /* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */ |
2 | /* Changes: Removed mktemp */ | |
3 | ||
5bf337a5 | 4 | /* $OpenBSD: mktemp.c,v 1.19 2005/08/08 08:05:36 espie Exp $ */ |
8efc0c15 | 5 | /* |
6 | * Copyright (c) 1987, 1993 | |
7 | * The Regents of the University of California. All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
3e67f7df | 17 | * 3. Neither the name of the University nor the names of its contributors |
8efc0c15 | 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 REGENTS 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 REGENTS 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 | ||
f6d4fb87 | 34 | /* OPENBSD ORIGINAL: lib/libc/stdio/mktemp.c */ |
35 | ||
0b65b628 | 36 | #include "includes.h" |
beb43d31 | 37 | |
b5b88c19 | 38 | #include <sys/types.h> |
39 | #include <sys/stat.h> | |
22bbb3e6 | 40 | #include <fcntl.h> |
b5b88c19 | 41 | #include <ctype.h> |
42 | ||
70e7d0b0 | 43 | #if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) |
beb43d31 | 44 | |
4cca272e | 45 | static int _gettemp(char *, int *, int, int); |
8efc0c15 | 46 | |
47 | int | |
5bf337a5 | 48 | mkstemps(char *path, int slen) |
8efc0c15 | 49 | { |
50 | int fd; | |
51 | ||
52 | return (_gettemp(path, &fd, 0, slen) ? fd : -1); | |
53 | } | |
54 | ||
55 | int | |
5bf337a5 | 56 | mkstemp(char *path) |
8efc0c15 | 57 | { |
58 | int fd; | |
59 | ||
60 | return (_gettemp(path, &fd, 0, 0) ? fd : -1); | |
61 | } | |
62 | ||
63 | char * | |
5bf337a5 | 64 | mkdtemp(char *path) |
8efc0c15 | 65 | { |
66 | return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL); | |
67 | } | |
68 | ||
69 | static int | |
70 | _gettemp(path, doopen, domkdir, slen) | |
71 | char *path; | |
72 | register int *doopen; | |
73 | int domkdir; | |
74 | int slen; | |
75 | { | |
76 | register char *start, *trv, *suffp; | |
77 | struct stat sbuf; | |
1656cbed | 78 | int rval; |
79 | pid_t pid; | |
8efc0c15 | 80 | |
81 | if (doopen && domkdir) { | |
82 | errno = EINVAL; | |
83 | return(0); | |
84 | } | |
85 | ||
86 | for (trv = path; *trv; ++trv) | |
87 | ; | |
88 | trv -= slen; | |
89 | suffp = trv; | |
90 | --trv; | |
91 | if (trv < path) { | |
92 | errno = EINVAL; | |
93 | return (0); | |
94 | } | |
95 | pid = getpid(); | |
ac8802eb | 96 | while (trv >= path && *trv == 'X' && pid != 0) { |
8efc0c15 | 97 | *trv-- = (pid % 10) + '0'; |
98 | pid /= 10; | |
99 | } | |
ac8802eb | 100 | while (trv >= path && *trv == 'X') { |
8efc0c15 | 101 | char c; |
102 | ||
103 | pid = (arc4random() & 0xffff) % (26+26); | |
104 | if (pid < 26) | |
105 | c = pid + 'A'; | |
106 | else | |
107 | c = (pid - 26) + 'a'; | |
108 | *trv-- = c; | |
109 | } | |
110 | start = trv + 1; | |
111 | ||
112 | /* | |
113 | * check the target directory; if you have six X's and it | |
114 | * doesn't exist this runs for a *very* long time. | |
115 | */ | |
116 | if (doopen || domkdir) { | |
117 | for (;; --trv) { | |
118 | if (trv <= path) | |
119 | break; | |
120 | if (*trv == '/') { | |
121 | *trv = '\0'; | |
122 | rval = stat(path, &sbuf); | |
123 | *trv = '/'; | |
124 | if (rval != 0) | |
125 | return(0); | |
126 | if (!S_ISDIR(sbuf.st_mode)) { | |
127 | errno = ENOTDIR; | |
128 | return(0); | |
129 | } | |
130 | break; | |
131 | } | |
132 | } | |
133 | } | |
134 | ||
135 | for (;;) { | |
136 | if (doopen) { | |
137 | if ((*doopen = | |
138 | open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) | |
139 | return(1); | |
140 | if (errno != EEXIST) | |
141 | return(0); | |
142 | } else if (domkdir) { | |
143 | if (mkdir(path, 0700) == 0) | |
144 | return(1); | |
145 | if (errno != EEXIST) | |
146 | return(0); | |
147 | } else if (lstat(path, &sbuf)) | |
148 | return(errno == ENOENT ? 1 : 0); | |
149 | ||
150 | /* tricky little algorithm for backward compatibility */ | |
151 | for (trv = start;;) { | |
152 | if (!*trv) | |
153 | return (0); | |
154 | if (*trv == 'Z') { | |
155 | if (trv == suffp) | |
156 | return (0); | |
157 | *trv++ = 'a'; | |
158 | } else { | |
159 | if (isdigit(*trv)) | |
160 | *trv = 'a'; | |
161 | else if (*trv == 'z') /* inc from z to A */ | |
162 | *trv = 'A'; | |
163 | else { | |
164 | if (trv == suffp) | |
165 | return (0); | |
166 | ++*trv; | |
167 | } | |
168 | break; | |
169 | } | |
170 | } | |
171 | } | |
172 | /*NOTREACHED*/ | |
173 | } | |
fb723d82 | 174 | |
70e7d0b0 | 175 | #endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */ |