| | 1 | /* |
| | 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * The contents of this file constitute Original Code as defined in and |
| | 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| | 8 | * "License"). You may not use this file except in compliance with the |
| | 9 | * License. Please obtain a copy of the License at |
| | 10 | * http://www.apple.com/publicsource and read it before using this file. |
| | 11 | * |
| | 12 | * This Original Code and all software distributed under the License are |
| | 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| | 17 | * License for the specific language governing rights and limitations |
| | 18 | * under the License. |
| | 19 | * |
| | 20 | * @APPLE_LICENSE_HEADER_END@ |
| | 21 | */ |
| | 22 | /* |
| | 23 | * Copyright (c) 1987, 1993 |
| | 24 | * The Regents of the University of California. All rights reserved. |
| | 25 | * |
| | 26 | * Redistribution and use in source and binary forms, with or without |
| | 27 | * modification, are permitted provided that the following conditions |
| | 28 | * are met: |
| | 29 | * 1. Redistributions of source code must retain the above copyright |
| | 30 | * notice, this list of conditions and the following disclaimer. |
| | 31 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 32 | * notice, this list of conditions and the following disclaimer in the |
| | 33 | * documentation and/or other materials provided with the distribution. |
| | 34 | * 3. All advertising materials mentioning features or use of this software |
| | 35 | * must display the following acknowledgement: |
| | 36 | * This product includes software developed by the University of |
| | 37 | * California, Berkeley and its contributors. |
| | 38 | * 4. Neither the name of the University nor the names of its contributors |
| | 39 | * may be used to endorse or promote products derived from this software |
| | 40 | * without specific prior written permission. |
| | 41 | * |
| | 42 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 43 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 44 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 45 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 46 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 47 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 48 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 49 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 50 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 51 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 52 | * SUCH DAMAGE. |
| | 53 | */ |
| | 54 | |
| | 55 | |
| | 56 | #include <sys/types.h> |
| | 57 | #include <sys/stat.h> |
| | 58 | #include <fcntl.h> |
| | 59 | #include <errno.h> |
| | 60 | #include <stdio.h> |
| | 61 | #include <ctype.h> |
| | 62 | #include <errno.h> |
| | 63 | |
| | 64 | static int _gettemp(); |
| | 65 | |
| | 66 | int |
| | 67 | mkstemp(path) |
| | 68 | char *path; |
| | 69 | { |
| | 70 | int fd; |
| | 71 | |
| | 72 | return (_gettemp(path, &fd) ? fd : -1); |
| | 73 | } |
| | 74 | |
| | 75 | char * |
| | 76 | mktemp(path) |
| | 77 | char *path; |
| | 78 | { |
| | 79 | return(_gettemp(path, (int *)NULL) ? path : (char *)NULL); |
| | 80 | } |
| | 81 | |
| | 82 | static int |
| | 83 | _gettemp(path, doopen) |
| | 84 | char *path; |
| | 85 | register int *doopen; |
| | 86 | { |
| | 87 | register char *start, *trv; |
| | 88 | struct stat sbuf; |
| | 89 | u_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 | if (trv <= path) |
| | 104 | break; |
| | 105 | if (*trv == '/') { |
| | 106 | *trv = '\0'; |
| | 107 | if (stat(path, &sbuf)) |
| | 108 | return(0); |
| | 109 | if (!S_ISDIR(sbuf.st_mode)) { |
| | 110 | errno = ENOTDIR; |
| | 111 | return(0); |
| | 112 | } |
| | 113 | *trv = '/'; |
| | 114 | break; |
| | 115 | } |
| | 116 | } |
| | 117 | |
| | 118 | for (;;) { |
| | 119 | if (doopen) { |
| | 120 | if ((*doopen = |
| | 121 | open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) |
| | 122 | return(1); |
| | 123 | if (errno != EEXIST) |
| | 124 | return(0); |
| | 125 | } |
| | 126 | else if (stat(path, &sbuf)) |
| | 127 | return(errno == ENOENT ? 1 : 0); |
| | 128 | |
| | 129 | /* tricky little algorithm for backward compatibility */ |
| | 130 | for (trv = start;;) { |
| | 131 | if (!*trv) |
| | 132 | return(0); |
| | 133 | if (*trv == 'z') |
| | 134 | *trv++ = 'a'; |
| | 135 | else { |
| | 136 | if (isdigit(*trv)) |
| | 137 | *trv = 'a'; |
| | 138 | else |
| | 139 | ++*trv; |
| | 140 | break; |
| | 141 | } |
| | 142 | } |
| | 143 | } |
| | 144 | /*NOTREACHED*/ |
| | 145 | } |
projects / apple / libc.git / blame_incremental