fs.cpp@ 3672

Last change on this file since 3672 was 3672, checked in by vboxsync, 17 years ago
RT_OS_* and RT_ARCH_* for Runtime/ and Support/
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1	/* $Id: fs.cpp 3672 2007-07-17 12:39:30Z vboxsync $ */
2	/** @file
3	* innotek Portable Runtime - File System.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 innotek GmbH
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 as published by the Free Software Foundation,
13	* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14	* distribution. VirtualBox OSE is distributed in the hope that it will
15	* be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* If you received this file as part of a commercial VirtualBox
18	* distribution, then only the terms of your commercial VirtualBox
19	* license agreement apply instead of the previous paragraph.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#ifndef RT_OS_WINDOWS
27	# define RTTIME_INCL_TIMESPEC
28	# include <sys/time.h>
29	#endif
30
31	#include <iprt/fs.h>
32	#include <iprt/assert.h>
33	#include <iprt/time.h>
34	#include <iprt/string.h>
35	#include <iprt/path.h>
36	#include <iprt/ctype.h>
37	#include "internal/fs.h"
38
39
40	/**
41	* Converts dos-style attributes to Unix attributes.
42	*
43	* @returns
44	* @param fMode The mode mask containing dos-style attibutes only.
45	* @param pszName The filename which this applies to (exe check).
46	* @param cbName The length of that filename. (optional, set 0)
47	*/
48	RTFMODE rtFsModeFromDos(RTFMODE fMode, const char *pszName, unsigned cbName)
49	{
50	fMode &= ~((1 << RTFS_DOS_SHIFT) - 1);
51
52	/* everything is readable. */
53	fMode \|= RTFS_UNIX_IRUSR \| RTFS_UNIX_IRGRP \| RTFS_UNIX_IROTH;
54	if (fMode & RTFS_DOS_DIRECTORY)
55	/* directories are executable. */
56	fMode \|= RTFS_TYPE_DIRECTORY \| RTFS_UNIX_IXUSR \| RTFS_UNIX_IXGRP \| RTFS_UNIX_IXOTH;
57	else
58	{
59	fMode \|= RTFS_TYPE_FILE;
60	if (!cbName && pszName)
61	cbName = strlen(pszName);
62	if (cbName >= 4 && pszName[cbName - 4] == '.')
63	{
64	/* check for executable extension. */
65	const char *pszExt = &pszName[cbName - 3];
66	char szExt[4];
67	szExt[0] = tolower(pszExt[0]);
68	szExt[1] = tolower(pszExt[1]);
69	szExt[2] = tolower(pszExt[2]);
70	szExt[3] = '\0';
71	if ( !memcmp(szExt, "exe", 4)
72	\|\| !memcmp(szExt, "bat", 4)
73	\|\| !memcmp(szExt, "com", 4)
74	\|\| !memcmp(szExt, "cmd", 4)
75	\|\| !memcmp(szExt, "btm", 4)
76	)
77	fMode \|= RTFS_UNIX_IXUSR \| RTFS_UNIX_IXGRP \| RTFS_UNIX_IXOTH;
78	}
79	}
80	/* writable? */
81	if (!(fMode & RTFS_DOS_READONLY))
82	fMode \|= RTFS_UNIX_IWUSR \| RTFS_UNIX_IWGRP \| RTFS_UNIX_IWOTH;
83	return fMode;
84	}
85
86
87	/**
88	* Converts Unix attributes to Dos-style attributes.
89	*
90	* @returns
91	* @param fMode The mode mask containing dos-style attibutes only.
92	*/
93	RTFMODE rtFsModeFromUnix(RTFMODE fMode, const char *pszName, unsigned cbName)
94	{
95	fMode &= RTFS_UNIX_MASK;
96
97	if (!(fMode & (RTFS_UNIX_IWUSR \| RTFS_UNIX_IWGRP \| RTFS_UNIX_IWOTH)))
98	fMode \|= RTFS_DOS_READONLY;
99	if (RTFS_IS_DIRECTORY(fMode))
100	fMode \|= RTFS_DOS_DIRECTORY;
101	if (!(fMode & RTFS_DOS_MASK))
102	fMode \|= RTFS_DOS_NT_NORMAL;
103	if (!(fMode & RTFS_DOS_HIDDEN) && pszName)
104	{
105	pszName = RTPathFilename(pszName);
106	if (pszName && *pszName == '.')
107	fMode \|= RTFS_DOS_HIDDEN;
108	}
109	return fMode;
110	}
111
112
113	/**
114	* Converts dos-style attributes to Unix attributes.
115	*
116	* @returns Normalized file mode.
117	* @param fMode The mode mask containing dos-style attibutes only.
118	* @param pszName The filename which this applies to (exe check).
119	* @param cbName The length of that filename. (optional, set 0)
120	*/
121	RTFMODE rtFsModeNormalize(RTFMODE fMode, const char *pszName, unsigned cbName)
122	{
123	if (!(fMode & RTFS_UNIX_MASK))
124	rtFsModeFromDos(fMode, pszName, cbName);
125	else if (!(fMode & RTFS_DOS_MASK))
126	rtFsModeFromUnix(fMode, pszName, cbName);
127	else if (!(fMode & RTFS_TYPE_MASK))
128	fMode \|= fMode & RTFS_DOS_DIRECTORY ? RTFS_TYPE_DIRECTORY : RTFS_TYPE_FILE;
129	else if (RTFS_IS_DIRECTORY(fMode))
130	fMode \|= RTFS_DOS_DIRECTORY;
131	return fMode;
132	}
133
134
135	/**
136	* Checks if the file mode is valid or not.
137	*
138	* @return true if valid.
139	* @return false if invalid, done bitching.
140	* @param fMode The file mode.
141	*/
142	bool rtFsModeIsValid(RTFMODE fMode)
143	{
144	AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
145	\|\| (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
146	("%RTfmode\n", fMode), false);
147	AssertMsgReturn(RTFS_TYPE_MASK & fMode,
148	("%RTfmode\n", fMode), false);
149	/** @todo more checks! */
150	return true;
151	}
152
153
154	/**
155	* Checks if the file mode is valid as a permission mask or not.
156	*
157	* @return true if valid.
158	* @return false if invalid, done bitching.
159	* @param fMode The file mode.
160	*/
161	bool rtFsModeIsValidPermissions(RTFMODE fMode)
162	{
163	AssertMsgReturn( (!RTFS_IS_DIRECTORY(fMode) && !(fMode & RTFS_DOS_DIRECTORY))
164	\|\| (RTFS_IS_DIRECTORY(fMode) && (fMode & RTFS_DOS_DIRECTORY)),
165	("%RTfmode\n", fMode), false);
166	/** @todo more checks! */
167	return true;
168	}
169
170
171	#ifndef RT_OS_WINDOWS
172	/**
173	* Internal worker function which setups RTFSOBJINFO based on a UNIX stat struct.
174	*
175	* @param pObjInfo The file system object info structure to setup.
176	* @param pStat The stat structure to use.
177	*/
178	void rtFsConvertStatToObjInfo(PRTFSOBJINFO pObjInfo, const struct stat pStat, const char pszName, unsigned cbName)
179	{
180	pObjInfo->cbObject = pStat->st_size;
181	pObjInfo->cbAllocated = pStat->st_size;
182
183	#ifdef HAVE_STAT_NSEC
184	RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime), pStat->st_atimensec);
185	RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime), pStat->st_mtimensec);
186	RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime), pStat->st_ctimensec);
187	#ifdef HAVE_STAT_BIRTHTIME
188	RTTimeSpecAddNano(RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime), pStat->st_birthtimensec);
189	#endif
190
191	#elif defined(HAVE_STAT_TIMESPEC_BRIEF)
192	RTTimeSpecSetTimespec(&pObjInfo->AccessTime, &pStat->st_atim);
193	RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, &pStat->st_mtim);
194	RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, &pStat->st_ctim);
195	# ifdef HAVE_STAT_BIRTHTIME
196	RTTimeSpecSetTimespec(&pObjInfo->BirthTime, &pStat->st_birthtim);
197	# endif
198
199	#elif defined(HAVE_STAT_TIMESPEC)
200	RTTimeSpecSetTimespec(&pObjInfo->AccessTime, pStat->st_atimespec);
201	RTTimeSpecSetTimespec(&pObjInfo->ModificationTime, pStat->st_mtimespec);
202	RTTimeSpecSetTimespec(&pObjInfo->ChangeTime, pStat->st_ctimespec);
203	# ifdef HAVE_STAT_BIRTHTIME
204	RTTimeSpecSetTimespec(&pObjInfo->BirthTime, pStat->st_birthtimespec);
205	# endif
206
207	#else /* just the normal stuff */
208	RTTimeSpecSetSeconds(&pObjInfo->AccessTime, pStat->st_atime);
209	RTTimeSpecSetSeconds(&pObjInfo->ModificationTime, pStat->st_mtime);
210	RTTimeSpecSetSeconds(&pObjInfo->ChangeTime, pStat->st_ctime);
211	# ifdef HAVE_STAT_BIRTHTIME
212	RTTimeSpecSetSeconds(&pObjInfo->BirthTime, pStat->st_birthtime);
213	# endif
214	#endif
215	#ifndef HAVE_STAT_BIRTHTIME
216	pObjInfo->BirthTime = pObjInfo->ChangeTime;
217	#endif
218
219
220	/* the file mode */
221	RTFMODE fMode = pStat->st_mode & RTFS_UNIX_MASK;
222	Assert(RTFS_UNIX_ISUID == S_ISUID);
223	Assert(RTFS_UNIX_ISGID == S_ISGID);
224	#ifdef S_ISTXT
225	Assert(RTFS_UNIX_ISTXT == S_ISTXT);
226	#elif defined(S_ISVTX)
227	Assert(RTFS_UNIX_ISTXT == S_ISVTX);
228	#else
229	#error "S_ISVTX / S_ISTXT isn't defined"
230	#endif
231	Assert(RTFS_UNIX_IRWXU == S_IRWXU);
232	Assert(RTFS_UNIX_IRUSR == S_IRUSR);
233	Assert(RTFS_UNIX_IWUSR == S_IWUSR);
234	Assert(RTFS_UNIX_IXUSR == S_IXUSR);
235	Assert(RTFS_UNIX_IRWXG == S_IRWXG);
236	Assert(RTFS_UNIX_IRGRP == S_IRGRP);
237	Assert(RTFS_UNIX_IWGRP == S_IWGRP);
238	Assert(RTFS_UNIX_IXGRP == S_IXGRP);
239	Assert(RTFS_UNIX_IRWXO == S_IRWXO);
240	Assert(RTFS_UNIX_IROTH == S_IROTH);
241	Assert(RTFS_UNIX_IWOTH == S_IWOTH);
242	Assert(RTFS_UNIX_IXOTH == S_IXOTH);
243	Assert(RTFS_TYPE_FIFO == S_IFIFO);
244	Assert(RTFS_TYPE_DEV_CHAR == S_IFCHR);
245	Assert(RTFS_TYPE_DIRECTORY == S_IFDIR);
246	Assert(RTFS_TYPE_DEV_BLOCK == S_IFBLK);
247	Assert(RTFS_TYPE_FILE == S_IFREG);
248	Assert(RTFS_TYPE_SYMLINK == S_IFLNK);
249	Assert(RTFS_TYPE_SOCKET == S_IFSOCK);
250	#ifdef S_IFWHT
251	Assert(RTFS_TYPE_WHITEOUT == S_IFWHT);
252	#endif
253	Assert(RTFS_TYPE_MASK == S_IFMT);
254
255	pObjInfo->Attr.fMode = rtFsModeFromUnix(fMode, pszName, cbName);
256
257	/* additional unix attribs */
258	pObjInfo->Attr.enmAdditional = RTFSOBJATTRADD_UNIX;
259	pObjInfo->Attr.u.Unix.uid = pStat->st_uid;
260	pObjInfo->Attr.u.Unix.gid = pStat->st_gid;
261	pObjInfo->Attr.u.Unix.cHardlinks = pStat->st_nlink;
262	pObjInfo->Attr.u.Unix.INodeIdDevice = pStat->st_dev;
263	pObjInfo->Attr.u.Unix.INodeId = pStat->st_ino;
264	#ifdef HAVE_STAT_FLAGS
265	pObjInfo->Attr.u.Unix.fFlags = pStat->st_flags;
266	#else
267	pObjInfo->Attr.u.Unix.fFlags = 0;
268	#endif
269	#ifdef HAVE_STAT_GEN
270	pObjInfo->Attr.u.Unix.GenerationId = pStat->st_gen;
271	#else
272	pObjInfo->Attr.u.Unix.GenerationId = 0;
273	#endif
274	pObjInfo->Attr.u.Unix.Device = pStat->st_rdev;
275	}
276
277	#endif /* !RT_OS_WINDOWS */

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source: vbox/trunk/src/VBox/Runtime/fs.cpp@ 3672

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