Mercurial > trustbridge > nss-cmake-static
comparison nss/lib/dbm/src/mktemp.c @ 3:150b72113545
Add DBM and legacydb support
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Tue, 05 Aug 2014 18:32:02 +0200 |
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2:a945361df361 | 3:150b72113545 |
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1 /* | |
2 * Copyright (c) 1987, 1993 | |
3 * The Regents of the University of California. All rights reserved. | |
4 * | |
5 * Redistribution and use in source and binary forms, with or without | |
6 * modification, are permitted provided that the following conditions | |
7 * are met: | |
8 * 1. Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * 2. Redistributions in binary form must reproduce the above copyright | |
11 * notice, this list of conditions and the following disclaimer in the | |
12 * documentation and/or other materials provided with the distribution. | |
13 * 3. ***REMOVED*** - see | |
14 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change | |
15 * 4. Neither the name of the University nor the names of its contributors | |
16 * may be used to endorse or promote products derived from this software | |
17 * without specific prior written permission. | |
18 * | |
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
29 * SUCH DAMAGE. | |
30 */ | |
31 | |
32 #if defined(LIBC_SCCS) && !defined(lint) | |
33 static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93"; | |
34 #endif /* LIBC_SCCS and not lint */ | |
35 | |
36 #ifdef macintosh | |
37 #include <unix.h> | |
38 #else | |
39 #include <sys/types.h> | |
40 #include <sys/stat.h> | |
41 #endif | |
42 #include <fcntl.h> | |
43 #include <errno.h> | |
44 #include <stdio.h> | |
45 #include <ctype.h> | |
46 #include "mcom_db.h" | |
47 | |
48 #ifndef _WINDOWS | |
49 #include <unistd.h> | |
50 #endif | |
51 | |
52 #ifdef _WINDOWS | |
53 #include <process.h> | |
54 #include "winfile.h" | |
55 #endif | |
56 | |
57 static int _gettemp(char *path, register int *doopen, int extraFlags); | |
58 | |
59 int | |
60 mkstemp(char *path) | |
61 { | |
62 #ifdef XP_OS2 | |
63 FILE *temp = tmpfile(); | |
64 | |
65 return (temp ? fileno(temp) : -1); | |
66 #else | |
67 int fd; | |
68 | |
69 return (_gettemp(path, &fd, 0) ? fd : -1); | |
70 #endif | |
71 } | |
72 | |
73 int | |
74 mkstempflags(char *path, int extraFlags) | |
75 { | |
76 int fd; | |
77 | |
78 return (_gettemp(path, &fd, extraFlags) ? fd : -1); | |
79 } | |
80 | |
81 /* NB: This routine modifies its input string, and does not always restore it. | |
82 ** returns 1 on success, 0 on failure. | |
83 */ | |
84 static int | |
85 _gettemp(char *path, register int *doopen, int extraFlags) | |
86 { | |
87 register char *start, *trv; | |
88 struct stat sbuf; | |
89 unsigned int pid; | |
90 | |
91 pid = getpid(); | |
92 for (trv = path; *trv; ++trv); /* extra X's get set to 0's */ | |
93 while (*--trv == 'X') { | |
94 *trv = (pid % 10) + '0'; | |
95 pid /= 10; | |
96 } | |
97 | |
98 /* | |
99 * check the target directory; if you have six X's and it | |
100 * doesn't exist this runs for a *very* long time. | |
101 */ | |
102 for (start = trv + 1;; --trv) { | |
103 char saved; | |
104 if (trv <= path) | |
105 break; | |
106 saved = *trv; | |
107 if (saved == '/' || saved == '\\') { | |
108 int rv; | |
109 *trv = '\0'; | |
110 rv = stat(path, &sbuf); | |
111 *trv = saved; | |
112 if (rv) | |
113 return(0); | |
114 if (!S_ISDIR(sbuf.st_mode)) { | |
115 errno = ENOTDIR; | |
116 return(0); | |
117 } | |
118 break; | |
119 } | |
120 } | |
121 | |
122 for (;;) { | |
123 if (doopen) { | |
124 if ((*doopen = | |
125 open(path, O_CREAT|O_EXCL|O_RDWR|extraFlags, 0600)) >= 0) | |
126 return(1); | |
127 if (errno != EEXIST) | |
128 return(0); | |
129 } | |
130 else if (stat(path, &sbuf)) | |
131 return(errno == ENOENT ? 1 : 0); | |
132 | |
133 /* tricky little algorithm for backward compatibility */ | |
134 for (trv = start;;) { | |
135 if (!*trv) | |
136 return(0); | |
137 if (*trv == 'z') | |
138 *trv++ = 'a'; | |
139 else { | |
140 if (isdigit(*trv)) | |
141 *trv = 'a'; | |
142 else | |
143 ++*trv; | |
144 break; | |
145 } | |
146 } | |
147 } | |
148 /*NOTREACHED*/ | |
149 } |