diff options
Diffstat (limited to 'bsd-mktemp.c')
-rw-r--r-- | bsd-mktemp.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/bsd-mktemp.c b/bsd-mktemp.c new file mode 100644 index 000000000..cdef62da2 --- /dev/null +++ b/bsd-mktemp.c | |||
@@ -0,0 +1,189 @@ | |||
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 | |||
37 | #include "config.h" | ||
38 | |||
39 | #ifndef HAVE_MKDTEMP | ||
40 | |||
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 | |||
54 | #include "helper.h" | ||
55 | |||
56 | static int _gettemp(char *, int *, int, int); | ||
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 | } | ||
188 | |||
189 | #endif /* !HAVE_MKDTEMP */ | ||