fs.cpp@ 62514

Last change on this file since 62514 was 62477, checked in by vboxsync, 8 years ago
(C) 2016
Property svn:eol-style set to `native` Property svn:keywords set to `Id Revision`
File size: 8.1 KB

Line
1	/* $Id: fs.cpp 62477 2016-07-22 18:27:37Z vboxsync $ */
2	/** @file
3	* IPRT - File System.
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include <iprt/fs.h>
32	#include "internal/iprt.h"
33
34	#include <iprt/asm.h>
35	#include <iprt/assert.h>
36	#include <iprt/ctype.h>
37	#include <iprt/path.h>
38	#include <iprt/string.h>
39	#include <iprt/time.h>
40	#include "internal/fs.h"
41
42
43	/**
44	* Converts dos-style attributes to Unix attributes.
45	*
46	* @returns
47	* @param fMode The mode mask containing dos-style attributes only.
48	* @param pszName The filename which this applies to (exe check).
49	* @param cbName The length of that filename. (optional, set 0)
50	*/
51	RTFMODE rtFsModeFromDos(RTFMODE fMode, const char *pszName, size_t cbName)
52	{
53	fMode &= ~((1 << RTFS_DOS_SHIFT) - 1);
54
55	/* everything is readable. */
56	fMode \|= RTFS_UNIX_IRUSR \| RTFS_UNIX_IRGRP \| RTFS_UNIX_IROTH;
57	if (fMode & RTFS_DOS_DIRECTORY)
58	/* directories are executable. */
59	fMode \|= RTFS_TYPE_DIRECTORY \| RTFS_UNIX_IXUSR \| RTFS_UNIX_IXGRP \| RTFS_UNIX_IXOTH;
60	else
61	{
62	fMode \|= RTFS_TYPE_FILE;
63	if (!cbName && pszName)
64	cbName = strlen(pszName);
65	if (cbName >= 4 && pszName[cbName - 4] == '.')
66	{
67	/* check for executable extension. */
68	const char *pszExt = &pszName[cbName - 3];
69	char szExt[4];
70	szExt[0] = RT_C_TO_LOWER(pszExt[0]);
71	szExt[1] = RT_C_TO_LOWER(pszExt[1]);
72	szExt[2] = RT_C_TO_LOWER(pszExt[2]);
73	szExt[3] = '\0';
74	if ( !memcmp(szExt, "exe", 4)
75	\|\| !memcmp(szExt, "bat", 4)
76	\|\| !memcmp(szExt, "com", 4)
77	\|\| !memcmp(szExt, "cmd", 4)
78	\|\| !memcmp(szExt, "btm", 4)
79	)
80	fMode \|= RTFS_UNIX_IXUSR \| RTFS_UNIX_IXGRP \| RTFS_UNIX_IXOTH;
81	}
82	}
83
84	/* Is it really a symbolic link? */
85	if (fMode & RTFS_DOS_NT_REPARSE_POINT)
86	fMode = (fMode & ~RTFS_TYPE_MASK) \| RTFS_TYPE_SYMLINK;
87
88	/* writable? */
89	if (!(fMode & RTFS_DOS_READONLY))
90	fMode \|= RTFS_UNIX_IWUSR \| RTFS_UNIX_IWGRP \| RTFS_UNIX_IWOTH;
91	return fMode;
92	}
93
94
95	/**
96	* Converts Unix attributes to Dos-style attributes.
97	*
98	* @returns File mode mask.
99	* @param fMode The mode mask containing dos-style attributes only.
100	* @param pszName The filename which this applies to (hidden check).
101	* @param cbName The length of that filename. (optional, set 0)
102	*/
103	RTFMODE rtFsModeFromUnix(RTFMODE fMode, const char *pszName, size_t cbName)
104	{
105	NOREF(cbName);
106
107	fMode &= RTFS_UNIX_MASK;
108
109	if (!(fMode & (RTFS_UNIX_IWUSR \| RTFS_UNIX_IWGRP \| RTFS_UNIX_IWOTH)))
110	fMode \|= RTFS_DOS_READONLY;
111	if (RTFS_IS_DIRECTORY(fMode))
112	fMode \|= RTFS_DOS_DIRECTORY;
113	if (!(fMode & RTFS_DOS_MASK))
114	fMode \|= RTFS_DOS_NT_NORMAL;
115	if (!(fMode & RTFS_DOS_HIDDEN) && pszName)
116	{
117	pszName = RTPathFilename(pszName);
118	if (pszName && *pszName == '.')
119	fMode \|= RTFS_DOS_HIDDEN;
120	}
121	return fMode;
122	}
123
124
125	/**
126	* Normalizes the give mode mask.
127	*
128	* It will create the missing unix or dos mask from the other (one
129	* of them is required by all APIs), and guess the file type if that's
130	* missing.
131	*
132	* @returns Normalized file mode.
133	* @param fMode The mode mask that may contain a partial/incomplete mask.
134	* @param pszName The filename which this applies to (exe check).
135	* @param cbName The length of that filename. (optional, set 0)
136	*/
137	RTFMODE rtFsModeNormalize(RTFMODE fMode, const char *pszName, size_t cbName)
138	{
139	if (!(fMode & RTFS_UNIX_MASK))
140	fMode = rtFsModeFromDos(fMode, pszName, cbName);
141	else if (!(fMode & RTFS_DOS_MASK))
142	fMode = rtFsModeFromUnix(fMode, pszName, cbName);
143	else if (!(fMode & RTFS_TYPE_MASK))
144	fMode \|= fMode & RTFS_DOS_DIRECTORY ? RTFS_TYPE_DIRECTORY : RTFS_TYPE_FILE;
145	else if (RTFS_IS_DIRECTORY(fMode))
146	fMode \|= RTFS_DOS_DIRECTORY;
147	return fMode;
148	}
149
150
151	/**
152	* Checks if the file mode is valid or not.
153	*
154	* @return true if valid.
155	* @return false if invalid, done bitching.
156	* @param fMode The file mode.
157	*/
158	bool rtFsModeIsValid(RTFMODE fMode)
159	{
160	AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
161	\|\| (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
162	("%RTfmode\n", fMode), false);
163	AssertMsgReturn(RTFS_TYPE_MASK & fMode,
164	("%RTfmode\n", fMode), false);
165	/** @todo more checks! */
166	return true;
167	}
168
169
170	/**
171	* Checks if the file mode is valid as a permission mask or not.
172	*
173	* @return true if valid.
174	* @return false if invalid, done bitching.
175	* @param fMode The file mode.
176	*/
177	bool rtFsModeIsValidPermissions(RTFMODE fMode)
178	{
179	AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
180	\|\| (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
181	("%RTfmode\n", fMode), false);
182	/** @todo more checks! */
183	return true;
184	}
185
186
187	RTDECL(const char *) RTFsTypeName(RTFSTYPE enmType)
188	{
189	switch (enmType)
190	{
191	case RTFSTYPE_UNKNOWN: return "unknown";
192	case RTFSTYPE_UDF: return "udf";
193	case RTFSTYPE_ISO9660: return "iso9660";
194	case RTFSTYPE_FUSE: return "fuse";
195	case RTFSTYPE_VBOXSHF: return "vboxshf";
196
197	case RTFSTYPE_EXT: return "ext";
198	case RTFSTYPE_EXT2: return "ext2";
199	case RTFSTYPE_EXT3: return "ext3";
200	case RTFSTYPE_EXT4: return "ext4";
201	case RTFSTYPE_XFS: return "xfs";
202	case RTFSTYPE_CIFS: return "cifs";
203	case RTFSTYPE_SMBFS: return "smbfs";
204	case RTFSTYPE_TMPFS: return "tmpfs";
205	case RTFSTYPE_SYSFS: return "sysfs";
206	case RTFSTYPE_PROC: return "proc";
207	case RTFSTYPE_OCFS2: return "ocfs2";
208	case RTFSTYPE_BTRFS: return "btrfs";
209
210	case RTFSTYPE_NTFS: return "ntfs";
211	case RTFSTYPE_FAT: return "fat";
212
213	case RTFSTYPE_ZFS: return "zfs";
214	case RTFSTYPE_UFS: return "ufs";
215	case RTFSTYPE_NFS: return "nfs";
216
217	case RTFSTYPE_HFS: return "hfs";
218	case RTFSTYPE_AUTOFS: return "autofs";
219	case RTFSTYPE_DEVFS: return "devfs";
220
221	case RTFSTYPE_HPFS: return "hpfs";
222	case RTFSTYPE_JFS: return "jfs";
223
224	case RTFSTYPE_END: return "end";
225	case RTFSTYPE_32BIT_HACK: break;
226	}
227
228	/* Don't put this in as 'default:', we wish GCC to warn about missing cases. */
229	static char s_asz[4][64];
230	static uint32_t volatile s_i = 0;
231	uint32_t i = ASMAtomicIncU32(&s_i) % RT_ELEMENTS(s_asz);
232	RTStrPrintf(s_asz[i], sizeof(s_asz[i]), "type=%d", enmType);
233	return s_asz[i];
234	}
235

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source: vbox/trunk/src/VBox/Runtime/r3/fs.cpp@ 62514

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