| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 1 | /* $OpenBSD: tempnam.c,v 1.14 2005/08/08 08:05:36 espie Exp $ */ |
| 2 | /* |
| 3 | * Copyright (c) 1988, 1993 |
| 4 | * The Regents of the University of California. All rights reserved. |
| 5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
| 9 | * 1. Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * 3. Neither the name of the University nor the names of its contributors |
| 15 | * may be used to endorse or promote products derived from this software |
| 16 | * without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #include <sys/param.h> |
| 32 | #include <errno.h> |
| 33 | #include <stdio.h> |
| 34 | #include <stdlib.h> |
| 35 | #include <string.h> |
| 36 | #include <unistd.h> |
| 37 | #include <paths.h> |
| 38 | |
| 39 | __warn_references(tempnam, |
| 40 | "warning: tempnam() possibly used unsafely; consider using mkstemp()"); |
| 41 | |
| 42 | extern char *_mktemp(char *); |
| 43 | |
| 44 | char * |
| 45 | tempnam(const char *dir, const char *pfx) |
| 46 | { |
| 47 | int sverrno; |
| 48 | char *f, *name; |
| 49 | |
| 50 | if (!(name = malloc(MAXPATHLEN))) |
| 51 | return(NULL); |
| 52 | |
| 53 | if (!pfx) |
| 54 | pfx = "tmp."; |
| 55 | |
| 56 | if (issetugid() == 0 && (f = getenv("TMPDIR"))) { |
| 57 | (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXXXXXX", f, |
| 58 | *(f + strlen(f) - 1) == '/'? "": "/", pfx); |
| 59 | if ((f = _mktemp(name))) |
| 60 | return(f); |
| 61 | } |
| 62 | |
| 63 | if ((f = (char *)dir)) { |
| 64 | (void)snprintf(name, MAXPATHLEN, "%s%s%sXXXXXXXXXX", f, |
| 65 | *(f + strlen(f) - 1) == '/'? "": "/", pfx); |
| 66 | if ((f = _mktemp(name))) |
| 67 | return(f); |
| 68 | } |
| 69 | |
| 70 | f = P_tmpdir; |
| 71 | (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXXXXX", f, pfx); |
| 72 | if ((f = _mktemp(name))) |
| 73 | return(f); |
| 74 | |
| 75 | f = _PATH_TMP; |
| 76 | (void)snprintf(name, MAXPATHLEN, "%s%sXXXXXXXXX", f, pfx); |
| 77 | if ((f = _mktemp(name))) |
| 78 | return(f); |
| 79 | |
| 80 | sverrno = errno; |
| 81 | free(name); |
| 82 | errno = sverrno; |
| 83 | return(NULL); |
| 84 | } |