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annotate nss/lib/dbm/src/mktemp.c @ 3:150b72113545

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