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comparison: security/nss/lib/dbm/src/mktemp.c
security/nss/lib/dbm/src/mktemp.c
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| -1:000000000000 | 0:fd6e54bd26a2 |
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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 } |
