summaryrefslogtreecommitdiffstats
path: root/qtools/qfileinfo_unix.cpp
blob: e9000890869359bdfe63a5b6f15ddd815b299705 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
/****************************************************************************
**
**
** Implementation of QFileInfo class
**
** Created : 950628
**
** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.
**
** This file is part of the tools module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.QPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
** licenses for Unix/X11 or for Qt/Embedded may use this file in accordance
** with the Qt Commercial License Agreement provided with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for QPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include "qglobal.h"

#if defined(_OS_SUN_)
#define readlink _qt_hide_readlink
#endif

#include <pwd.h>
#include <grp.h>

#include "qfileinfo.h"
#include "qfiledefs_p.h"
#include "qdir.h"

#if defined(_OS_SUN_)
#undef readlink
extern "C" int readlink( const char *, void *, uint );
#endif


void QFileInfo::slashify( QString& )
{
    return;
}


void QFileInfo::makeAbs( QString & )
{
    return;
}

extern bool qt_file_access( const QString& fn, int t );

/*!
  Returns TRUE if we are pointing to a real file.
  \sa isDir(), isSymLink()
*/
bool QFileInfo::isFile() const
{
    if ( !fic || !cache )
	doStat();
    return fic ? (fic->st.st_mode & STAT_MASK) == STAT_REG : FALSE;
}

/*!
  Returns TRUE if we are pointing to a directory or a symbolic link to
  a directory.
  \sa isFile(), isSymLink()
*/

bool QFileInfo::isDir() const
{
    if ( !fic || !cache )
	doStat();
    return fic ? (fic->st.st_mode & STAT_MASK) == STAT_DIR : FALSE;
}

/*!
  Returns TRUE if we are pointing to a symbolic link.
  \sa isFile(), isDir(), readLink()
*/

bool QFileInfo::isSymLink() const
{
    if ( !fic || !cache )
	doStat();
    return fic ? fic->isSymLink : FALSE;
}


/*!
  Returns the name a symlink points to, or a null QString if the
  object does not refer to a symbolic link.

  This name may not represent an existing file; it is only a string.
  QFileInfo::exists() returns TRUE if the symlink points to an
  existing file.

  \sa exists(), isSymLink(), isDir(), isFile()
*/

QString QFileInfo::readLink() const
{
    QString r;

#if defined(_OS_UNIX_) && !defined(_OS_OS2EMX_)
    char s[PATH_MAX+1];
    if ( !isSymLink() )
	return QString();
    int len = (int)readlink( QFile::encodeName(fn).data(), s, PATH_MAX );
    if ( len >= 0 ) {
	s[len] = '\0';
	r = QFile::decodeName(s);
    }
#endif

    return r;
}

static const uint nobodyID = (uint) -2;

/*!
  Returns the owner of the file.

  On systems where files do not have owners this function returns 0.

  Note that this function can be time-consuming under UNIX. (in the order
  of milliseconds on a 486 DX2/66 running Linux).

  \sa ownerId(), group(), groupId()
*/

QString QFileInfo::owner() const
{
    passwd *pw = getpwuid( ownerId() );
    if ( pw )
	return QFile::decodeName( pw->pw_name );
    return QString::null;
}

/*!
  Returns the id of the owner of the file.

  On systems where files do not have owners this function returns ((uint) -2).

  \sa owner(), group(), groupId()
*/

uint QFileInfo::ownerId() const
{
    if ( !fic || !cache )
	doStat();
    if ( fic )
	return fic->st.st_uid;
    return nobodyID;
}

/*!
  Returns the group the file belongs to.

  On systems where files do not have groups this function always
  returns 0.

  Note that this function can be time-consuming under UNIX (in the order of
  milliseconds on a 486 DX2/66 running Linux).

  \sa groupId(), owner(), ownerId()
*/

QString QFileInfo::group() const
{
    struct group *gr = getgrgid( groupId() );
    if ( gr )
	return QFile::decodeName( gr->gr_name );
    return QString::null;
}

/*!
  Returns the id of the group the file belongs to.

  On systems where files do not have groups this function always
  returns ((uind) -2).

  \sa group(), owner(), ownerId()
*/

uint QFileInfo::groupId() const
{
    if ( !fic || !cache )
	doStat();
    if ( fic )
	return fic->st.st_gid;
    return nobodyID;
}


/*!
  \fn bool QFileInfo::permission( int permissionSpec ) const

  Tests for file permissions.  The \e permissionSpec argument can be several
  flags of type PermissionSpec or'ed together to check for permission
  combinations.

  On systems where files do not have permissions this function always
  returns TRUE.

  Example:
  \code
    QFileInfo fi( "/tmp/tonsils" );
    if ( fi.permission( QFileInfo::WriteUser | QFileInfo::ReadGroup ) )
	qWarning( "Tonsils can be changed by me, and the group can read them.");
    if ( fi.permission( QFileInfo::WriteGroup | QFileInfo::WriteOther ) )
	qWarning( "Danger! Tonsils can be changed by the group or others!" );
  \endcode

  \sa isReadable(), isWritable(), isExecutable()
*/

bool QFileInfo::permission( int permissionSpec ) const
{
    if ( !fic || !cache )
	doStat();
    if ( fic ) {
	uint mask = 0;
	if ( permissionSpec & ReadUser)
	    mask |= S_IRUSR;
	if ( permissionSpec & WriteUser)
	    mask |= S_IWUSR;
	if ( permissionSpec & ExeUser)
	    mask |= S_IXUSR;
	if ( permissionSpec & ReadGroup)
	    mask |= S_IRGRP;
	if ( permissionSpec & WriteGroup)
	    mask |= S_IWGRP;
	if ( permissionSpec & ExeGroup)
	    mask |= S_IXGRP;
	if ( permissionSpec & ReadOther)
	    mask |= S_IROTH;
	if ( permissionSpec & WriteOther)
	    mask |= S_IWOTH;
	if ( permissionSpec & ExeOther)
	    mask |= S_IXOTH;
	if ( mask ) {
	   return (fic->st.st_mode & mask) == mask;
	} else {
#if defined(CHECK_NULL)
	   qWarning( "QFileInfo::permission: permissionSpec is 0" );
#endif
	   return TRUE;
	}
    } else {
	return FALSE;
    }
}

/*!
  Returns the file size in bytes, or 0 if the file does not exist if the size
  cannot be fetched.
*/

uint QFileInfo::size() const
{
    if ( !fic || !cache )
	doStat();
    if ( fic )
	return (uint)fic->st.st_size;
    else
	return 0;
}

void QFileInfo::doStat() const
{
    QFileInfo *that = ((QFileInfo*)this);	// mutable function
    if ( !that->fic )
	that->fic = new QFileInfoCache;
    STATBUF *b = &that->fic->st;
    that->fic->isSymLink = FALSE;

#if defined(_OS_UNIX_) && defined(S_IFLNK)
    if ( ::lstat(QFile::encodeName(fn),b) == 0 ) {
	if ( S_ISLNK( b->st_mode ) )
	    that->fic->isSymLink = TRUE;
	else
	    return;
    }
#endif
    int r;

    r = STAT( QFile::encodeName(fn), b );

    if ( r != 0 ) {
	delete that->fic;
	that->fic = 0;
    }
}

/*!
  Returns the directory path of the file.

  If \e absPath is TRUE an absolute path is always returned.

  \sa dir(), filePath(), fileName(), isRelative()
*/
#ifndef QT_NO_DIR
QString QFileInfo::dirPath( bool absPath ) const
{
    QString s;
    if ( absPath )
	s = absFilePath();
    else
	s = fn;
    int pos = s.findRev( '/' );
    if ( pos == -1 ) {
	return QString::fromLatin1(".");
    } else {
	if ( pos == 0 )
	    return QString::fromLatin1( "/" );
	return s.left( pos );
    }
}
#endif
/*!
  Returns the name of the file, the file path is not included.

  Example:
  \code
     QFileInfo fi( "/tmp/abdomen.lower" );
     QString name = fi.fileName();		// name = "abdomen.lower"
  \endcode

  \sa isRelative(), filePath(), baseName(), extension()
*/

QString QFileInfo::fileName() const
{
    int p = fn.findRev( '/' );
    if ( p == -1 ) {
	return fn;
    } else {
	return fn.mid(p+1);
    }
}

/*!
  Returns the absolute path name.

  The absolute path name is the file name including the absolute path. If
  the QFileInfo is absolute (i.e. not relative) this function will return
  the same string as filePath().

  Note that this function can be time-consuming under UNIX. (in the order
  of milliseconds on a 486 DX2/66 running Linux).

  \sa isRelative(), filePath()
*/
#ifndef QT_NO_DIR
QString QFileInfo::absFilePath() const
{
    if ( QDir::isRelativePath(fn) ) {
	QString tmp = QDir::currentDirPath();
	tmp += '/';
	tmp += fn;
	makeAbs( tmp );
	return QDir::cleanDirPath( tmp );
    } else {
	QString tmp = fn;
	makeAbs( tmp );
	return QDir::cleanDirPath( tmp );
    }

}
#endif