Mercurial > embed
annotate libzip/lib/mkstemp.c @ 63:b3c185090dc2
cmake: use BUILD_INTERFACE, closes #881 @10m
| author | David Demelier <markand@malikania.fr> |
|---|---|
| date | Fri, 13 Jul 2018 12:32:37 +0200 |
| parents | 056ee6b5913e |
| children |
| rev | line source |
|---|---|
| 4 | 1 /* Adapted from NetBSB libc by Dieter Baron */ |
| 2 | |
| 3 /* NetBSD: gettemp.c,v 1.13 2003/12/05 00:57:36 uebayasi Exp */ | |
| 4 | |
| 5 /* | |
| 6 * Copyright (c) 1987, 1993 | |
| 7 * The Regents of the University of California. All rights reserved. | |
| 8 * | |
| 9 * Redistribution and use in source and binary forms, with or without | |
| 10 * modification, are permitted provided that the following conditions | |
| 11 * are met: | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * 2. Redistributions in binary form must reproduce the above copyright | |
| 15 * notice, this list of conditions and the following disclaimer in the | |
| 16 * documentation and/or other materials provided with the distribution. | |
| 17 * 3. Neither the name of the University nor the names of its contributors | |
| 18 * may be used to endorse or promote products derived from this software | |
| 19 * without specific prior written permission. | |
| 20 * | |
| 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 * SUCH DAMAGE. | |
| 32 */ | |
| 33 | |
| 34 #include <sys/types.h> | |
| 35 #include <sys/stat.h> | |
| 36 | |
| 37 #include <assert.h> | |
| 38 #include <ctype.h> | |
| 39 #include <errno.h> | |
| 40 #include <fcntl.h> | |
| 41 #ifdef _WIN32 | |
|
56
056ee6b5913e
libzip: update to 1.3.0, closes #654
David Demelier <markand@malikania.fr>
parents:
4
diff
changeset
|
42 #include <process.h> |
| 4 | 43 #include <io.h> |
|
56
056ee6b5913e
libzip: update to 1.3.0, closes #654
David Demelier <markand@malikania.fr>
parents:
4
diff
changeset
|
44 #else |
|
056ee6b5913e
libzip: update to 1.3.0, closes #654
David Demelier <markand@malikania.fr>
parents:
4
diff
changeset
|
45 #include <unistd.h> |
| 4 | 46 #endif |
| 47 #include <stdio.h> | |
| 48 #include <stdlib.h> | |
| 49 | |
| 50 #ifndef O_BINARY | |
| 51 #define O_BINARY 0 | |
| 52 #endif | |
| 53 | |
| 54 | |
| 55 int | |
| 56 _zip_mkstemp(char *path) | |
| 57 { | |
| 58 #ifdef _WIN32 | |
| 59 int ret; | |
| 60 ret = _creat(_mktemp(path), _S_IREAD|_S_IWRITE); | |
| 61 if (ret == -1) { | |
| 62 return 0; | |
| 63 } else { | |
| 64 return ret; | |
| 65 } | |
| 66 #else | |
| 67 int fd; | |
| 68 char *start, *trv; | |
| 69 struct stat sbuf; | |
| 70 pid_t pid; | |
| 71 | |
| 72 /* To guarantee multiple calls generate unique names even if | |
| 73 the file is not created. 676 different possibilities with 7 | |
| 74 or more X's, 26 with 6 or less. */ | |
| 75 static char xtra[2] = "aa"; | |
| 76 int xcnt = 0; | |
| 77 | |
| 78 pid = getpid(); | |
| 79 | |
| 80 /* Move to end of path and count trailing X's. */ | |
| 81 for (trv = path; *trv; ++trv) | |
| 82 if (*trv == 'X') | |
| 83 xcnt++; | |
| 84 else | |
| 85 xcnt = 0; | |
| 86 | |
| 87 /* Use at least one from xtra. Use 2 if more than 6 X's. */ | |
| 88 if (*(trv - 1) == 'X') | |
| 89 *--trv = xtra[0]; | |
| 90 if (xcnt > 6 && *(trv - 1) == 'X') | |
| 91 *--trv = xtra[1]; | |
| 92 | |
| 93 /* Set remaining X's to pid digits with 0's to the left. */ | |
| 94 while (*--trv == 'X') { | |
| 95 *trv = (pid % 10) + '0'; | |
| 96 pid /= 10; | |
| 97 } | |
| 98 | |
| 99 /* update xtra for next call. */ | |
| 100 if (xtra[0] != 'z') | |
| 101 xtra[0]++; | |
| 102 else { | |
| 103 xtra[0] = 'a'; | |
| 104 if (xtra[1] != 'z') | |
| 105 xtra[1]++; | |
| 106 else | |
| 107 xtra[1] = 'a'; | |
| 108 } | |
| 109 | |
| 110 /* | |
| 111 * check the target directory; if you have six X's and it | |
| 112 * doesn't exist this runs for a *very* long time. | |
| 113 */ | |
| 114 for (start = trv + 1;; --trv) { | |
| 115 if (trv <= path) | |
| 116 break; | |
| 117 if (*trv == '/') { | |
| 118 *trv = '\0'; | |
| 119 if (stat(path, &sbuf)) | |
| 120 return (0); | |
| 121 if (!S_ISDIR(sbuf.st_mode)) { | |
| 122 errno = ENOTDIR; | |
| 123 return (0); | |
| 124 } | |
| 125 *trv = '/'; | |
| 126 break; | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 for (;;) { | |
| 131 if ((fd=open(path, O_CREAT|O_EXCL|O_RDWR|O_BINARY, 0600)) >= 0) | |
| 132 return (fd); | |
| 133 if (errno != EEXIST) | |
| 134 return (0); | |
| 135 | |
| 136 /* tricky little algorithm for backward compatibility */ | |
| 137 for (trv = start;;) { | |
| 138 if (!*trv) | |
| 139 return (0); | |
| 140 if (*trv == 'z') | |
| 141 *trv++ = 'a'; | |
| 142 else { | |
| 143 if (isdigit((unsigned char)*trv)) | |
| 144 *trv = 'a'; | |
| 145 else | |
| 146 ++*trv; | |
| 147 break; | |
| 148 } | |
| 149 } | |
| 150 } | |
| 151 /*NOTREACHED*/ | |
| 152 #endif | |
| 153 } |