| 1 | /* $Id: ntmkdirat.c 3682 2025-08-12 23:34:19Z bird $ */
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| 2 | /** @file
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| 3 | * MSC + NT mkdir & mkdirat.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2025 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
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| 8 | *
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a
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| 10 | * copy of this software and associated documentation files (the "Software"),
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| 11 | * to deal in the Software without restriction, including without limitation
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the
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| 14 | * Software is furnished to do so, subject to the following conditions:
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| 15 | *
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| 16 | * The above copyright notice and this permission notice shall be included
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| 17 | * in all copies or substantial portions of the Software.
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| 18 | *
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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| 20 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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| 22 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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| 23 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 24 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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| 25 | * IN THE SOFTWARE.
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| 26 | *
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| 27 | * Alternatively, the content of this file may be used under the terms of the
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| 28 | * GPL version 2 or later, or LGPL version 2.1 or later.
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| 29 | */
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| 30 |
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| 31 |
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| 32 | /*******************************************************************************
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| 33 | * Header Files *
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| 34 | *******************************************************************************/
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| 35 | #include <errno.h>
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| 36 | #include <assert.h>
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| 37 | #include <fcntl.h>
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| 38 | #include <io.h>
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| 39 |
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| 40 | #include "ntstuff.h"
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| 41 | #include "nthlp.h"
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| 42 | #include "nthlpmisc.h"
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| 43 | #include "ntmkdirat.h"
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| 44 |
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| 45 |
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| 46 |
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| 47 | /**
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| 48 | * Implements mkdir.
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| 49 | */
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| 50 | int birdMkDir(const char *pszPath, unsigned __int16 fMode)
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| 51 | {
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| 52 | HANDLE hDir = birdOpenFile(pszPath,
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| 53 | FILE_LIST_DIRECTORY | SYNCHRONIZE,
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| 54 | FILE_ATTRIBUTE_NORMAL,
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| 55 | FILE_SHARE_READ | FILE_SHARE_WRITE /*| FILE_SHARE_DELETE*/,
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| 56 | FILE_CREATE,
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| 57 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
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| 58 | OBJ_CASE_INSENSITIVE);
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| 59 | if (hDir != INVALID_HANDLE_VALUE)
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| 60 | {
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| 61 | birdCloseFile(hDir);
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| 62 | return 0;
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| 63 | }
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| 64 | (void)fMode;
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| 65 | return -1;
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| 66 | }
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| 67 |
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| 68 |
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| 69 | /**
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| 70 | * Implements mkdirat.
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| 71 | */
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| 72 | int birdMkDirAt(int fdDir, const char *pszPath, unsigned __int16 fMode)
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| 73 | {
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| 74 | HANDLE hDirParent;
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| 75 |
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| 76 | /*
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| 77 | * Redirect to regular 'mkdir' when we can.
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| 78 | */
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| 79 | if (fdDir == AT_FDCWD)
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| 80 | return birdMkDir(pszPath, fMode);
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| 81 |
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| 82 | if (IS_SLASH(pszPath[0]))
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| 83 | {
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| 84 | if (IS_SLASH(pszPath[1]) && !IS_SLASH(pszPath[2]) && pszPath[2] != '\0')
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| 85 | return birdMkDir(pszPath, fMode);
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| 86 | }
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| 87 | else if (IS_ALPHA(pszPath[0]) && pszPath[1] == ':')
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| 88 | {
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| 89 | if (IS_SLASH(pszPath[2]))
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| 90 | return birdMkDir(pszPath, fMode);
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| 91 | /*
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| 92 | * Drive letter relative path like "C:kernel32.dll".
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| 93 | * We could try use fdDir as the CWD here if it refers to the same drive,
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| 94 | * however that's can be implemented later...
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| 95 | */
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| 96 | return birdMkDir(pszPath, fMode);
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| 97 | }
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| 98 |
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| 99 | /*
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| 100 | * Otherwise, we leave to to NT to get this done... It isn't necessarily as
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| 101 | * atomic as the opengroup spec wants, but we cannot do much better.
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| 102 | */
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| 103 | hDirParent = (HANDLE)_get_osfhandle(fdDir);
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| 104 | if (hDirParent != INVALID_HANDLE_VALUE)
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| 105 | {
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| 106 | HANDLE hDir = birdOpenFileEx(hDirParent,
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| 107 | pszPath,
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| 108 | FILE_LIST_DIRECTORY | SYNCHRONIZE,
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| 109 | FILE_ATTRIBUTE_NORMAL,
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| 110 | FILE_SHARE_READ | FILE_SHARE_WRITE /*| FILE_SHARE_DELETE*/,
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| 111 | FILE_CREATE,
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| 112 | FILE_DIRECTORY_FILE | FILE_OPEN_FOR_BACKUP_INTENT | FILE_SYNCHRONOUS_IO_NONALERT,
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| 113 | OBJ_CASE_INSENSITIVE);
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| 114 | if (hDir != INVALID_HANDLE_VALUE)
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| 115 | {
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| 116 | birdCloseFile(hDir);
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| 117 | return 0;
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| 118 | }
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| 119 | }
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| 120 | return -1;
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| 121 | }
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| 122 |
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