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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 | |
70e7d0b0 | 38 | #if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) |
beb43d31 | 39 | |
4cca272e | 40 | static int _gettemp(char *, int *, int, int); |
8efc0c15 | 41 | |
42 | int | |
5bf337a5 | 43 | mkstemps(char *path, int slen) |
8efc0c15 | 44 | { |
45 | int fd; | |
46 | ||
47 | return (_gettemp(path, &fd, 0, slen) ? fd : -1); | |
48 | } | |
49 | ||
50 | int | |
5bf337a5 | 51 | mkstemp(char *path) |
8efc0c15 | 52 | { |
53 | int fd; | |
54 | ||
55 | return (_gettemp(path, &fd, 0, 0) ? fd : -1); | |
56 | } | |
57 | ||
58 | char * | |
5bf337a5 | 59 | mkdtemp(char *path) |
8efc0c15 | 60 | { |
61 | return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL); | |
62 | } | |
63 | ||
64 | static int | |
65 | _gettemp(path, doopen, domkdir, slen) | |
66 | char *path; | |
67 | register int *doopen; | |
68 | int domkdir; | |
69 | int slen; | |
70 | { | |
71 | register char *start, *trv, *suffp; | |
72 | struct stat sbuf; | |
1656cbed | 73 | int rval; |
74 | pid_t pid; | |
8efc0c15 | 75 | |
76 | if (doopen && domkdir) { | |
77 | errno = EINVAL; | |
78 | return(0); | |
79 | } | |
80 | ||
81 | for (trv = path; *trv; ++trv) | |
82 | ; | |
83 | trv -= slen; | |
84 | suffp = trv; | |
85 | --trv; | |
86 | if (trv < path) { | |
87 | errno = EINVAL; | |
88 | return (0); | |
89 | } | |
90 | pid = getpid(); | |
ac8802eb | 91 | while (trv >= path && *trv == 'X' && pid != 0) { |
8efc0c15 | 92 | *trv-- = (pid % 10) + '0'; |
93 | pid /= 10; | |
94 | } | |
ac8802eb | 95 | while (trv >= path && *trv == 'X') { |
8efc0c15 | 96 | char c; |
97 | ||
98 | pid = (arc4random() & 0xffff) % (26+26); | |
99 | if (pid < 26) | |
100 | c = pid + 'A'; | |
101 | else | |
102 | c = (pid - 26) + 'a'; | |
103 | *trv-- = c; | |
104 | } | |
105 | start = trv + 1; | |
106 | ||
107 | /* | |
108 | * check the target directory; if you have six X's and it | |
109 | * doesn't exist this runs for a *very* long time. | |
110 | */ | |
111 | if (doopen || domkdir) { | |
112 | for (;; --trv) { | |
113 | if (trv <= path) | |
114 | break; | |
115 | if (*trv == '/') { | |
116 | *trv = '\0'; | |
117 | rval = stat(path, &sbuf); | |
118 | *trv = '/'; | |
119 | if (rval != 0) | |
120 | return(0); | |
121 | if (!S_ISDIR(sbuf.st_mode)) { | |
122 | errno = ENOTDIR; | |
123 | return(0); | |
124 | } | |
125 | break; | |
126 | } | |
127 | } | |
128 | } | |
129 | ||
130 | for (;;) { | |
131 | if (doopen) { | |
132 | if ((*doopen = | |
133 | open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) | |
134 | return(1); | |
135 | if (errno != EEXIST) | |
136 | return(0); | |
137 | } else if (domkdir) { | |
138 | if (mkdir(path, 0700) == 0) | |
139 | return(1); | |
140 | if (errno != EEXIST) | |
141 | return(0); | |
142 | } else if (lstat(path, &sbuf)) | |
143 | return(errno == ENOENT ? 1 : 0); | |
144 | ||
145 | /* tricky little algorithm for backward compatibility */ | |
146 | for (trv = start;;) { | |
147 | if (!*trv) | |
148 | return (0); | |
149 | if (*trv == 'Z') { | |
150 | if (trv == suffp) | |
151 | return (0); | |
152 | *trv++ = 'a'; | |
153 | } else { | |
154 | if (isdigit(*trv)) | |
155 | *trv = 'a'; | |
156 | else if (*trv == 'z') /* inc from z to A */ | |
157 | *trv = 'A'; | |
158 | else { | |
159 | if (trv == suffp) | |
160 | return (0); | |
161 | ++*trv; | |
162 | } | |
163 | break; | |
164 | } | |
165 | } | |
166 | } | |
167 | /*NOTREACHED*/ | |
168 | } | |
fb723d82 | 169 | |
70e7d0b0 | 170 | #endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */ |