Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 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 | #if defined(LIBC_SCCS) && !defined(lint) |
| 38 | static char rcsid[] = "$OpenBSD: mktemp.c,v 1.13 1998/06/30 23:03:13 deraadt Exp $"; |
| 39 | #endif /* LIBC_SCCS and not lint */ |
| 40 | |
| 41 | #include <sys/types.h> |
| 42 | #include <sys/stat.h> |
| 43 | #include <fcntl.h> |
| 44 | #include <errno.h> |
| 45 | #include <stdio.h> |
| 46 | #include <stdlib.h> |
| 47 | #include <ctype.h> |
| 48 | #include <unistd.h> |
| 49 | |
Damien Miller | e413cba | 1999-10-28 14:12:54 +1000 | [diff] [blame] | 50 | #include "config.h" |
Damien Miller | 3d112ef | 1999-10-28 13:20:30 +1000 | [diff] [blame] | 51 | #include "helper.h" |
| 52 | |
Damien Miller | e413cba | 1999-10-28 14:12:54 +1000 | [diff] [blame] | 53 | #ifndef HAVE_MKDTEMP |
| 54 | |
Damien Miller | d4a8b7e | 1999-10-27 13:42:43 +1000 | [diff] [blame] | 55 | static int _gettemp __P((char *, int *, int, int)); |
| 56 | |
| 57 | int |
| 58 | mkstemps(path, slen) |
| 59 | char *path; |
| 60 | int slen; |
| 61 | { |
| 62 | int fd; |
| 63 | |
| 64 | return (_gettemp(path, &fd, 0, slen) ? fd : -1); |
| 65 | } |
| 66 | |
| 67 | int |
| 68 | mkstemp(path) |
| 69 | char *path; |
| 70 | { |
| 71 | int fd; |
| 72 | |
| 73 | return (_gettemp(path, &fd, 0, 0) ? fd : -1); |
| 74 | } |
| 75 | |
| 76 | char * |
| 77 | mkdtemp(path) |
| 78 | char *path; |
| 79 | { |
| 80 | return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL); |
| 81 | } |
| 82 | |
| 83 | static int |
| 84 | _gettemp(path, doopen, domkdir, slen) |
| 85 | char *path; |
| 86 | register int *doopen; |
| 87 | int domkdir; |
| 88 | int slen; |
| 89 | { |
| 90 | register char *start, *trv, *suffp; |
| 91 | struct stat sbuf; |
| 92 | int pid, rval; |
| 93 | |
| 94 | if (doopen && domkdir) { |
| 95 | errno = EINVAL; |
| 96 | return(0); |
| 97 | } |
| 98 | |
| 99 | for (trv = path; *trv; ++trv) |
| 100 | ; |
| 101 | trv -= slen; |
| 102 | suffp = trv; |
| 103 | --trv; |
| 104 | if (trv < path) { |
| 105 | errno = EINVAL; |
| 106 | return (0); |
| 107 | } |
| 108 | pid = getpid(); |
| 109 | while (*trv == 'X' && pid != 0) { |
| 110 | *trv-- = (pid % 10) + '0'; |
| 111 | pid /= 10; |
| 112 | } |
| 113 | while (*trv == 'X') { |
| 114 | char c; |
| 115 | |
| 116 | pid = (arc4random() & 0xffff) % (26+26); |
| 117 | if (pid < 26) |
| 118 | c = pid + 'A'; |
| 119 | else |
| 120 | c = (pid - 26) + 'a'; |
| 121 | *trv-- = c; |
| 122 | } |
| 123 | start = trv + 1; |
| 124 | |
| 125 | /* |
| 126 | * check the target directory; if you have six X's and it |
| 127 | * doesn't exist this runs for a *very* long time. |
| 128 | */ |
| 129 | if (doopen || domkdir) { |
| 130 | for (;; --trv) { |
| 131 | if (trv <= path) |
| 132 | break; |
| 133 | if (*trv == '/') { |
| 134 | *trv = '\0'; |
| 135 | rval = stat(path, &sbuf); |
| 136 | *trv = '/'; |
| 137 | if (rval != 0) |
| 138 | return(0); |
| 139 | if (!S_ISDIR(sbuf.st_mode)) { |
| 140 | errno = ENOTDIR; |
| 141 | return(0); |
| 142 | } |
| 143 | break; |
| 144 | } |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | for (;;) { |
| 149 | if (doopen) { |
| 150 | if ((*doopen = |
| 151 | open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0) |
| 152 | return(1); |
| 153 | if (errno != EEXIST) |
| 154 | return(0); |
| 155 | } else if (domkdir) { |
| 156 | if (mkdir(path, 0700) == 0) |
| 157 | return(1); |
| 158 | if (errno != EEXIST) |
| 159 | return(0); |
| 160 | } else if (lstat(path, &sbuf)) |
| 161 | return(errno == ENOENT ? 1 : 0); |
| 162 | |
| 163 | /* tricky little algorithm for backward compatibility */ |
| 164 | for (trv = start;;) { |
| 165 | if (!*trv) |
| 166 | return (0); |
| 167 | if (*trv == 'Z') { |
| 168 | if (trv == suffp) |
| 169 | return (0); |
| 170 | *trv++ = 'a'; |
| 171 | } else { |
| 172 | if (isdigit(*trv)) |
| 173 | *trv = 'a'; |
| 174 | else if (*trv == 'z') /* inc from z to A */ |
| 175 | *trv = 'A'; |
| 176 | else { |
| 177 | if (trv == suffp) |
| 178 | return (0); |
| 179 | ++*trv; |
| 180 | } |
| 181 | break; |
| 182 | } |
| 183 | } |
| 184 | } |
| 185 | /*NOTREACHED*/ |
| 186 | } |
Damien Miller | e413cba | 1999-10-28 14:12:54 +1000 | [diff] [blame] | 187 | |
| 188 | #endif /* !HAVE_MKDTEMP */ |