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3c0ef626 | 1 | /* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */ |
2 | /* Changes: Removed mktemp */ | |
3 | ||
e00da40d | 4 | /* $OpenBSD: mktemp.c,v 1.19 2005/08/08 08:05:36 espie Exp $ */ |
3c0ef626 | 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. | |
70791e56 | 17 | * 3. Neither the name of the University nor the names of its contributors |
3c0ef626 | 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 | ||
e00da40d | 34 | /* OPENBSD ORIGINAL: lib/libc/stdio/mktemp.c */ |
35 | ||
3c0ef626 | 36 | #include "includes.h" |
37 | ||
2e437378 | 38 | #include <sys/types.h> |
39 | #include <sys/stat.h> | |
40 | ||
41 | #include <fcntl.h> | |
42 | #include <ctype.h> | |
43 | #include <errno.h> | |
44 | #include <unistd.h> | |
45 | ||
1c14df9e | 46 | #if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) |
3c0ef626 | 47 | |
3c0ef626 | 48 | static int _gettemp(char *, int *, int, int); |
49 | ||
50 | int | |
e00da40d | 51 | mkstemps(char *path, int slen) |
3c0ef626 | 52 | { |
53 | int fd; | |
54 | ||
55 | return (_gettemp(path, &fd, 0, slen) ? fd : -1); | |
56 | } | |
57 | ||
58 | int | |
e00da40d | 59 | mkstemp(char *path) |
3c0ef626 | 60 | { |
61 | int fd; | |
62 | ||
63 | return (_gettemp(path, &fd, 0, 0) ? fd : -1); | |
64 | } | |
65 | ||
66 | char * | |
e00da40d | 67 | mkdtemp(char *path) |
3c0ef626 | 68 | { |
69 | return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL); | |
70 | } | |
71 | ||
72 | static int | |
73 | _gettemp(path, doopen, domkdir, slen) | |
74 | char *path; | |
75 | register int *doopen; | |
76 | int domkdir; | |
77 | int slen; | |
78 | { | |
79 | register char *start, *trv, *suffp; | |
80 | struct stat sbuf; | |
e9a17296 | 81 | int rval; |
82 | pid_t pid; | |
3c0ef626 | 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(); | |
e54b3d7c | 99 | while (trv >= path && *trv == 'X' && pid != 0) { |
3c0ef626 | 100 | *trv-- = (pid % 10) + '0'; |
101 | pid /= 10; | |
102 | } | |
e54b3d7c | 103 | while (trv >= path && *trv == 'X') { |
3c0ef626 | 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 | } | |
177 | ||
1c14df9e | 178 | #endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */ |