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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 | ||
beb43d31 | 37 | #include "config.h" |
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 | ||
45 | #include <sys/types.h> | |
46 | #include <sys/stat.h> | |
47 | #include <fcntl.h> | |
48 | #include <errno.h> | |
49 | #include <stdio.h> | |
50 | #include <stdlib.h> | |
51 | #include <ctype.h> | |
52 | #include <unistd.h> | |
53 | ||
5ab44a92 | 54 | #include "bsd-misc.h" |
0183ea1c | 55 | |
4cca272e | 56 | static int _gettemp(char *, int *, int, int); |
8efc0c15 | 57 | |
58 | int | |
59 | mkstemps(path, slen) | |
60 | char *path; | |
61 | int slen; | |
62 | { | |
63 | int fd; | |
64 | ||
65 | return (_gettemp(path, &fd, 0, slen) ? fd : -1); | |
66 | } | |
67 | ||
68 | int | |
69 | mkstemp(path) | |
70 | char *path; | |
71 | { | |
72 | int fd; | |
73 | ||
74 | return (_gettemp(path, &fd, 0, 0) ? fd : -1); | |
75 | } | |
76 | ||
77 | char * | |
78 | mkdtemp(path) | |
79 | char *path; | |
80 | { | |
81 | return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL); | |
82 | } | |
83 | ||
84 | static int | |
85 | _gettemp(path, doopen, domkdir, slen) | |
86 | char *path; | |
87 | register int *doopen; | |
88 | int domkdir; | |
89 | int slen; | |
90 | { | |
91 | register char *start, *trv, *suffp; | |
92 | struct stat sbuf; | |
93 | int pid, rval; | |
94 | ||
95 | if (doopen && domkdir) { | |
96 | errno = EINVAL; | |
97 | return(0); | |
98 | } | |
99 | ||
100 | for (trv = path; *trv; ++trv) | |
101 | ; | |
102 | trv -= slen; | |
103 | suffp = trv; | |
104 | --trv; | |
105 | if (trv < path) { | |
106 | errno = EINVAL; | |
107 | return (0); | |
108 | } | |
109 | pid = getpid(); | |
110 | while (*trv == 'X' && pid != 0) { | |
111 | *trv-- = (pid % 10) + '0'; | |
112 | pid /= 10; | |
113 | } | |
114 | while (*trv == 'X') { | |
115 | char c; | |
116 | ||
117 | pid = (arc4random() & 0xffff) % (26+26); | |
118 | if (pid < 26) | |
119 | c = pid + 'A'; | |
120 | else | |
121 | c = (pid - 26) + 'a'; | |
122 | *trv-- = c; | |
123 | } | |
124 | start = trv + 1; | |
125 | ||
126 | /* | |
127 | * check the target directory; if you have six X's and it | |
128 | * doesn't exist this runs for a *very* long time. | |
129 | */ | |
130 | if (doopen || domkdir) { | |
131 | for (;; --trv) { | |
132 | if (trv <= path) | |
133 | break; | |
134 | if (*trv == '/') { | |
135 | *trv = '\0'; | |
136 | rval = stat(path, &sbuf); | |
137 | *trv = '/'; | |
138 | if (rval != 0) | |
139 | return(0); | |
140 | if (!S_ISDIR(sbuf.st_mode)) { | |
141 | errno = ENOTDIR; | |
142 | return(0); | |
143 | } | |
144 | break; | |
145 | } | |
146 | } | |
147 | } | |
148 | ||
149 | for (;;) { | |
150 | if (doopen) { | |
151 | if ((*doopen = | |
152 | open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) | |
153 | return(1); | |
154 | if (errno != EEXIST) | |
155 | return(0); | |
156 | } else if (domkdir) { | |
157 | if (mkdir(path, 0700) == 0) | |
158 | return(1); | |
159 | if (errno != EEXIST) | |
160 | return(0); | |
161 | } else if (lstat(path, &sbuf)) | |
162 | return(errno == ENOENT ? 1 : 0); | |
163 | ||
164 | /* tricky little algorithm for backward compatibility */ | |
165 | for (trv = start;;) { | |
166 | if (!*trv) | |
167 | return (0); | |
168 | if (*trv == 'Z') { | |
169 | if (trv == suffp) | |
170 | return (0); | |
171 | *trv++ = 'a'; | |
172 | } else { | |
173 | if (isdigit(*trv)) | |
174 | *trv = 'a'; | |
175 | else if (*trv == 'z') /* inc from z to A */ | |
176 | *trv = 'A'; | |
177 | else { | |
178 | if (trv == suffp) | |
179 | return (0); | |
180 | ++*trv; | |
181 | } | |
182 | break; | |
183 | } | |
184 | } | |
185 | } | |
186 | /*NOTREACHED*/ | |
187 | } | |
fb723d82 | 188 | |
189 | #endif /* !HAVE_MKDTEMP */ |