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Source at commit 1406 created 12 years 10 months ago. By meklort, Revert drivers.c so that kexts are only loaded when OSBundleRequired is set and that value is not safe mode. Added some comments about it too. | |
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1 | /******************************************************************************␊ |
2 | *␊ |
3 | * ␊ |
4 | *␊ |
5 | * Copyright (C) 1997-2001 by Dimitri van Heesch.␊ |
6 | *␊ |
7 | * Permission to use, copy, modify, and distribute this software and its␊ |
8 | * documentation under the terms of the GNU General Public License is hereby ␊ |
9 | * granted. No representations are made about the suitability of this software ␊ |
10 | * for any purpose. It is provided "as is" without express or implied warranty.␊ |
11 | * See the GNU General Public License for more details.␊ |
12 | *␊ |
13 | * Documents produced by Doxygen are derivative works derived from the␊ |
14 | * input used in their production; they are not affected by this license.␊ |
15 | *␊ |
16 | * Based on qfile_unix.cpp ␊ |
17 | *␊ |
18 | * Copyright (C) 1992-2000 Trolltech AS.␊ |
19 | */␊ |
20 | ␊ |
21 | #include "qglobal.h"␊ |
22 | ␊ |
23 | #include "qfile.h"␊ |
24 | #include "qfiledefs_p.h"␊ |
25 | ␊ |
26 | #if defined(_OS_MAC_) || defined(_OS_MSDOS_) || defined(_OS_WIN32_) || defined(_OS_OS2_)␊ |
27 | # define HAS_TEXT_FILEMODE␉␉␉// has translate/text filemode␊ |
28 | #endif␊ |
29 | #if defined(O_NONBLOCK)␊ |
30 | # define HAS_ASYNC_FILEMODE␊ |
31 | # define OPEN_ASYNC O_NONBLOCK␊ |
32 | #elif defined(O_NDELAY)␊ |
33 | # define HAS_ASYNC_FILEMODE␊ |
34 | # define OPEN_ASYNC O_NDELAY␊ |
35 | #endif␊ |
36 | ␊ |
37 | static void reslashify( QString& n )␊ |
38 | {␊ |
39 | for ( int i=0; i<(int)n.length(); i++ ) ␊ |
40 | {␊ |
41 | if ( n[i] == '/' )␊ |
42 | n[i] = '\\';␊ |
43 | }␊ |
44 | }␊ |
45 | ␊ |
46 | bool qt_file_access( const QString& fn, int t )␊ |
47 | {␊ |
48 | if ( fn.isEmpty() )␊ |
49 | ␉return FALSE;␊ |
50 | #if defined(__CYGWIN32_)␊ |
51 | return ACCESS( QFile::encodeName(fn), t ) == 0;␊ |
52 | #else␊ |
53 | QString str = fn;␊ |
54 | reslashify(str);␊ |
55 | return ( _waccess( (wchar_t*) str.ucs2(), t ) == 0 );␊ |
56 | #endif␊ |
57 | }␊ |
58 | ␊ |
59 | /*!␊ |
60 | Removes the file \a fileName.␊ |
61 | Returns TRUE if successful, otherwise FALSE.␊ |
62 | */␊ |
63 | ␊ |
64 | bool QFile::remove( const QString &fileName )␊ |
65 | {␊ |
66 | if ( fileName.isEmpty() ) {␊ |
67 | #if defined(CHECK_NULL)␊ |
68 | ␉qWarning( "QFile::remove: Empty or null file name" );␊ |
69 | #endif␊ |
70 | ␉return FALSE;␊ |
71 | }␊ |
72 | #if defined(__CYGWIN32_)␊ |
73 | // unlink more common in UNIX␊ |
74 | return ::remove( QFile::encodeName(fileName) ) == 0;␉␊ |
75 | #else␊ |
76 | QString str = fileName;␊ |
77 | reslashify(str);␊ |
78 | return ( _wunlink( (wchar_t*) str.ucs2() ) == 0 );␊ |
79 | #endif␊ |
80 | }␊ |
81 | ␊ |
82 | #if defined(O_NONBLOCK)␊ |
83 | # define HAS_ASYNC_FILEMODE␊ |
84 | # define OPEN_ASYNC O_NONBLOCK␊ |
85 | #elif defined(O_NDELAY)␊ |
86 | # define HAS_ASYNC_FILEMODE␊ |
87 | # define OPEN_ASYNC O_NDELAY␊ |
88 | #endif␊ |
89 | ␊ |
90 | /*!␊ |
91 | Opens the file specified by the file name currently set, using the mode \e m.␊ |
92 | Returns TRUE if successful, otherwise FALSE.␊ |
93 | ␊ |
94 | The mode parameter \e m must be a combination of the following flags:␊ |
95 | <ul>␊ |
96 | <li>\c IO_Raw specified raw (non-buffered) file access.␊ |
97 | <li>\c IO_ReadOnly opens the file in read-only mode.␊ |
98 | <li>\c IO_WriteOnly opens the file in write-only mode (and truncates).␊ |
99 | <li>\c IO_ReadWrite opens the file in read/write mode, equivalent to␊ |
100 | \c (IO_ReadOnly|IO_WriteOnly).␊ |
101 | <li>\c IO_Append opens the file in append mode. This mode is very useful␊ |
102 | when you want to write something to a log file. The file index is set to␊ |
103 | the end of the file. Note that the result is undefined if you position the␊ |
104 | file index manually using at() in append mode.␊ |
105 | <li>\c IO_Truncate truncates the file.␊ |
106 | <li>\c IO_Translate enables carriage returns and linefeed translation␊ |
107 | for text files under MS-DOS, Windows and OS/2.␊ |
108 | </ul>␊ |
109 | ␊ |
110 | The raw access mode is best when I/O is block-operated using 4kB block size␊ |
111 | or greater. Buffered access works better when reading small portions of␊ |
112 | data at a time.␊ |
113 | ␊ |
114 | <strong>Important:</strong> When working with buffered files, data may␊ |
115 | not be written to the file at once. Call \link flush() flush\endlink␊ |
116 | to make sure the data is really written.␊ |
117 | ␊ |
118 | \warning We have experienced problems with some C libraries when a buffered␊ |
119 | file is opened for both reading and writing. If a read operation takes place␊ |
120 | immediately after a write operation, the read buffer contains garbage data.␊ |
121 | Worse, the same garbage is written to the file. Calling flush() before␊ |
122 | readBlock() solved this problem.␊ |
123 | ␊ |
124 | If the file does not exist and \c IO_WriteOnly or \c IO_ReadWrite is␊ |
125 | specified, it is created.␊ |
126 | ␊ |
127 | Example:␊ |
128 | \code␊ |
129 | QFile f1( "/tmp/data.bin" );␊ |
130 | QFile f2( "readme.txt" );␊ |
131 | f1.open( IO_Raw | IO_ReadWrite | IO_Append );␊ |
132 | f2.open( IO_ReadOnly | IO_Translate );␊ |
133 | \endcode␊ |
134 | ␊ |
135 | \sa name(), close(), isOpen(), flush()␊ |
136 | */␊ |
137 | ␊ |
138 | bool QFile::open( int m )␊ |
139 | {␊ |
140 | if ( isOpen() ) {␉␉␉␉// file already open␊ |
141 | #if defined(CHECK_STATE)␊ |
142 | ␉qWarning( "QFile::open: File already open" );␊ |
143 | #endif␊ |
144 | ␉return FALSE;␊ |
145 | }␊ |
146 | if ( fn.isNull() ) {␉␉␉// no file name defined␊ |
147 | #if defined(CHECK_NULL)␊ |
148 | ␉qWarning( "QFile::open: No file name specified" );␊ |
149 | #endif␊ |
150 | ␉return FALSE;␊ |
151 | }␊ |
152 | init();␉␉␉␉␉// reset params␊ |
153 | setMode( m );␊ |
154 | if ( !(isReadable() || isWritable()) ) {␊ |
155 | #if defined(CHECK_RANGE)␊ |
156 | ␉qWarning( "QFile::open: File access not specified" );␊ |
157 | #endif␊ |
158 | ␉return FALSE;␊ |
159 | }␊ |
160 | bool ok = TRUE;␊ |
161 | STATBUF st;␊ |
162 | if ( isRaw() ) {␉␉␉␉// raw file I/O␊ |
163 | ␉int oflags = OPEN_RDONLY;␊ |
164 | ␉if ( isReadable() && isWritable() )␊ |
165 | ␉ oflags = OPEN_RDWR;␊ |
166 | ␉else if ( isWritable() )␊ |
167 | ␉ oflags = OPEN_WRONLY;␊ |
168 | ␉if ( flags() & IO_Append ) {␉␉// append to end of file?␊ |
169 | ␉ if ( flags() & IO_Truncate )␊ |
170 | ␉␉oflags |= (OPEN_CREAT | OPEN_TRUNC);␊ |
171 | ␉ else␊ |
172 | ␉␉oflags |= (OPEN_APPEND | OPEN_CREAT);␊ |
173 | ␉ setFlags( flags() | IO_WriteOnly ); // append implies write␊ |
174 | ␉} else if ( isWritable() ) {␉␉// create/trunc if writable␊ |
175 | ␉ if ( flags() & IO_Truncate )␊ |
176 | ␉␉oflags |= (OPEN_CREAT | OPEN_TRUNC);␊ |
177 | ␉ else␊ |
178 | ␉␉oflags |= OPEN_CREAT;␊ |
179 | ␉}␊ |
180 | #if defined(HAS_TEXT_FILEMODE)␊ |
181 | ␉if ( isTranslated() )␊ |
182 | ␉ oflags |= OPEN_TEXT;␊ |
183 | ␉else␊ |
184 | ␉ oflags |= OPEN_BINARY;␊ |
185 | #endif␊ |
186 | #if defined(HAS_ASYNC_FILEMODE)␊ |
187 | ␉if ( isAsynchronous() )␊ |
188 | ␉ oflags |= OPEN_ASYNC;␊ |
189 | #endif␊ |
190 | ␊ |
191 | ␊ |
192 | #if defined(__CYGWIN32_)␊ |
193 | ␉fd = OPEN( QFile::encodeName(fn), oflags, 0666 );␊ |
194 | #else␊ |
195 | QString str = fn;␊ |
196 | reslashify(str);␊ |
197 | fd = _wopen( (wchar_t*) str.ucs2(), oflags, 0666 );␊ |
198 | #endif␊ |
199 | ␊ |
200 | ␉if ( fd != -1 ) {␉␉␉// open successful␊ |
201 | ␉ FSTAT( fd, &st ); // get the stat for later usage␊ |
202 | ␉} else {␊ |
203 | ␉ ok = FALSE;␊ |
204 | ␉}␊ |
205 | } else {␉␉␉␉␉// buffered file I/O␊ |
206 | ␉QCString perm;␊ |
207 | ␉char perm2[4];␊ |
208 | ␉bool try_create = FALSE;␊ |
209 | ␉if ( flags() & IO_Append ) {␉␉// append to end of file?␊ |
210 | ␉ setFlags( flags() | IO_WriteOnly ); // append implies write␊ |
211 | ␉ perm = isReadable() ? "a+" : "a";␊ |
212 | ␉} else {␊ |
213 | ␉ if ( isReadWrite() ) {␊ |
214 | ␉␉if ( flags() & IO_Truncate ) {␊ |
215 | ␉␉ perm = "w+";␊ |
216 | ␉␉} else {␊ |
217 | ␉␉ perm = "r+";␊ |
218 | ␉␉ try_create = TRUE;␉␉// try to create if not exists␊ |
219 | ␉␉}␊ |
220 | ␉ } else if ( isReadable() ) {␊ |
221 | ␉␉perm = "r";␊ |
222 | ␉ } else if ( isWritable() ) {␊ |
223 | ␉␉perm = "w";␊ |
224 | ␉ }␊ |
225 | ␉}␊ |
226 | ␉qstrcpy( perm2, perm );␊ |
227 | ␉if ( isTranslated() )␊ |
228 | ␉ strcat( perm2, "t" );␊ |
229 | ␉else␊ |
230 | ␉ strcat( perm2, "b" );␊ |
231 | ␉while (1) { // At most twice␊ |
232 | ␊ |
233 | #if defined(__CYGWIN32_)␊ |
234 | ␉ fh = fopen( QFile::encodeName(fn), perm2 );␊ |
235 | #else␊ |
236 | QString str = fn;␊ |
237 | QString prm( perm2 );␊ |
238 | reslashify(str);␊ |
239 | fh = _wfopen( (wchar_t*) str.ucs2(), (wchar_t*) prm.ucs2() );␊ |
240 | #endif␊ |
241 | ␊ |
242 | ␉ if ( !fh && try_create ) {␊ |
243 | ␉␉perm2[0] = 'w';␉␉␉// try "w+" instead of "r+"␊ |
244 | ␉␉try_create = FALSE;␊ |
245 | ␉ } else {␊ |
246 | ␉␉break;␊ |
247 | ␉ }␊ |
248 | ␉}␊ |
249 | ␉if ( fh ) {␊ |
250 | ␉ FSTAT( FILENO(fh), &st ); // get the stat for later usage␊ |
251 | ␉} else {␊ |
252 | ␉ ok = FALSE;␊ |
253 | ␉}␊ |
254 | }␊ |
255 | if ( ok ) {␊ |
256 | ␉setState( IO_Open );␊ |
257 | ␉// on successful open the file stat was got; now test what type␊ |
258 | ␉// of file we have␊ |
259 | ␉if ( (st.st_mode & STAT_MASK) != STAT_REG ) {␊ |
260 | ␉ // non-seekable␊ |
261 | ␉ setType( IO_Sequential );␊ |
262 | ␉ length = INT_MAX;␊ |
263 | ␉ ioIndex = (flags() & IO_Append) == 0 ? 0 : length;␊ |
264 | ␉} else {␊ |
265 | ␉ length = (int)st.st_size;␊ |
266 | ␉ ioIndex = (flags() & IO_Append) == 0 ? 0 : length;␊ |
267 | ␉ if ( (flags() & !IO_Truncate) && length == 0 && isReadable() ) {␊ |
268 | ␉␉// try if you can read from it (if you can, it's a sequential␊ |
269 | ␉␉// device; e.g. a file in the /proc filesystem)␊ |
270 | ␉␉int c = getch();␊ |
271 | ␉␉if ( c != -1 ) {␊ |
272 | ␉␉ ungetch(c);␊ |
273 | ␉␉ setType( IO_Sequential );␊ |
274 | ␉␉ length = INT_MAX;␊ |
275 | ␉␉}␊ |
276 | ␉ }␊ |
277 | ␉}␊ |
278 | } else {␊ |
279 | ␉init();␊ |
280 | ␉if ( errno == EMFILE )␉␉␉// no more file handles/descrs␊ |
281 | ␉ setStatus( IO_ResourceError );␊ |
282 | ␉else␊ |
283 | ␉ setStatus( IO_OpenError );␊ |
284 | }␊ |
285 | return ok;␊ |
286 | }␊ |
287 | ␊ |
288 | /*!␊ |
289 | Opens a file in the mode \e m using an existing file handle \e f.␊ |
290 | Returns TRUE if successful, otherwise FALSE.␊ |
291 | ␊ |
292 | Example:␊ |
293 | \code␊ |
294 | #include <stdio.h>␊ |
295 | ␊ |
296 | void printError( const char* msg )␊ |
297 | {␊ |
298 | ␉QFile f;␊ |
299 | ␉f.open( IO_WriteOnly, stderr );␊ |
300 | ␉f.writeBlock( msg, qstrlen(msg) );␉// write to stderr␊ |
301 | ␉f.close();␊ |
302 | }␊ |
303 | \endcode␊ |
304 | ␊ |
305 | When a QFile is opened using this function, close() does not actually␊ |
306 | close the file, only flushes it.␊ |
307 | ␊ |
308 | \warning If \e f is \c stdin, \c stdout, \c stderr, you may not␊ |
309 | be able to seek. See QIODevice::isSequentialAccess() for more␊ |
310 | information.␊ |
311 | ␊ |
312 | \sa close()␊ |
313 | */␊ |
314 | ␊ |
315 | bool QFile::open( int m, FILE *f )␊ |
316 | {␊ |
317 | if ( isOpen() ) {␊ |
318 | #if defined(CHECK_RANGE)␊ |
319 | ␉qWarning( "QFile::open: File already open" );␊ |
320 | #endif␊ |
321 | ␉return FALSE;␊ |
322 | }␊ |
323 | init();␊ |
324 | setMode( m &~IO_Raw );␊ |
325 | setState( IO_Open );␊ |
326 | fh = f;␊ |
327 | ext_f = TRUE;␊ |
328 | STATBUF st;␊ |
329 | FSTAT( FILENO(fh), &st );␊ |
330 | ioIndex = (int)ftell( fh );␊ |
331 | if ( (st.st_mode & STAT_MASK) != STAT_REG ) {␊ |
332 | ␉// non-seekable␊ |
333 | ␉setType( IO_Sequential );␊ |
334 | ␉length = INT_MAX;␊ |
335 | } else {␊ |
336 | ␉length = (int)st.st_size;␊ |
337 | ␉if ( (flags() & !IO_Truncate) && length == 0 && isReadable() ) {␊ |
338 | ␉ // try if you can read from it (if you can, it's a sequential␊ |
339 | ␉ // device; e.g. a file in the /proc filesystem)␊ |
340 | ␉ int c = getch();␊ |
341 | ␉ if ( c != -1 ) {␊ |
342 | ␉␉ungetch(c);␊ |
343 | ␉␉setType( IO_Sequential );␊ |
344 | ␉␉length = INT_MAX;␊ |
345 | ␉ }␊ |
346 | ␉}␊ |
347 | }␊ |
348 | return TRUE;␊ |
349 | }␊ |
350 | ␊ |
351 | /*!␊ |
352 | Opens a file in the mode \e m using an existing file descriptor \e f.␊ |
353 | Returns TRUE if successful, otherwise FALSE.␊ |
354 | ␊ |
355 | When a QFile is opened using this function, close() does not actually␊ |
356 | close the file.␊ |
357 | ␊ |
358 | \warning If \e f is one of 0 (stdin), 1 (stdout) or 2 (stderr), you may not␊ |
359 | be able to seek. size() is set to \c INT_MAX (in limits.h).␊ |
360 | ␊ |
361 | \sa close()␊ |
362 | */␊ |
363 | ␊ |
364 | ␊ |
365 | bool QFile::open( int m, int f )␊ |
366 | {␊ |
367 | if ( isOpen() ) {␊ |
368 | #if defined(CHECK_RANGE)␊ |
369 | ␉qWarning( "QFile::open: File already open" );␊ |
370 | #endif␊ |
371 | ␉return FALSE;␊ |
372 | }␊ |
373 | init();␊ |
374 | setMode( m |IO_Raw );␊ |
375 | setState( IO_Open );␊ |
376 | fd = f;␊ |
377 | ext_f = TRUE;␊ |
378 | STATBUF st;␊ |
379 | FSTAT( fd, &st );␊ |
380 | ioIndex = (int)LSEEK(fd, 0, SEEK_CUR);␊ |
381 | if ( (st.st_mode & STAT_MASK) != STAT_REG ) {␊ |
382 | ␉// non-seekable␊ |
383 | ␉setType( IO_Sequential );␊ |
384 | ␉length = INT_MAX;␊ |
385 | } else {␊ |
386 | ␉length = (int)st.st_size;␊ |
387 | ␉if ( length == 0 && isReadable() ) {␊ |
388 | ␉ // try if you can read from it (if you can, it's a sequential␊ |
389 | ␉ // device; e.g. a file in the /proc filesystem)␊ |
390 | ␉ int c = getch();␊ |
391 | ␉ if ( c != -1 ) {␊ |
392 | ␉␉ungetch(c);␊ |
393 | ␉␉setType( IO_Sequential );␊ |
394 | ␉␉length = INT_MAX;␊ |
395 | ␉ }␊ |
396 | ␉}␊ |
397 | }␊ |
398 | return TRUE;␊ |
399 | }␊ |
400 | ␊ |
401 | /*!␊ |
402 | Returns the file size.␊ |
403 | \sa at()␊ |
404 | */␊ |
405 | ␊ |
406 | uint QFile::size() const␊ |
407 | {␊ |
408 | STATBUF st;␊ |
409 | if ( isOpen() ) {␊ |
410 | ␉FSTAT( fh ? FILENO(fh) : fd, &st );␊ |
411 | return st.st_size;␊ |
412 | } else {␊ |
413 | #if defined(__CYGWIN32_)␊ |
414 | ␉STAT( QFile::encodeName(fn), &st );␊ |
415 | #else␊ |
416 | QString str = fn;␊ |
417 | reslashify(str);␊ |
418 | #ifdef QT_LARGEFILE_SUPPORT␊ |
419 | if ( _wstati64( (wchar_t*) str.ucs2(), &st ) != -1 ) {␊ |
420 | #else␊ |
421 | if ( _wstat( (wchar_t*) str.ucs2(), &st ) != -1 ) {␊ |
422 | #endif␊ |
423 | #endif␊ |
424 | return st.st_size;␊ |
425 | }␊ |
426 | }␊ |
427 | return 0;␊ |
428 | }␊ |
429 | ␊ |
430 | /*!␊ |
431 | \fn int QFile::at() const␊ |
432 | Returns the file index.␊ |
433 | \sa size()␊ |
434 | */␊ |
435 | ␊ |
436 | /*!␊ |
437 | Sets the file index to \e pos. Returns TRUE if successful, otherwise FALSE.␊ |
438 | ␊ |
439 | Example:␊ |
440 | \code␊ |
441 | QFile f( "data.bin" );␊ |
442 | f.open( IO_ReadOnly );␉␉␉// index set to 0␊ |
443 | f.at( 100 );␉␉␉␉// set index to 100␊ |
444 | f.at( f.at()+50 );␉␉␉␉// set index to 150␊ |
445 | f.at( f.size()-80 );␉␉␉// set index to 80 before EOF␊ |
446 | f.close();␊ |
447 | \endcode␊ |
448 | ␊ |
449 | \warning The result is undefined if the file was \link open() opened\endlink␊ |
450 | using the \c IO_Append specifier.␊ |
451 | ␊ |
452 | \sa size(), open()␊ |
453 | */␊ |
454 | ␊ |
455 | bool QFile::at( int pos )␊ |
456 | {␊ |
457 | if ( !isOpen() ) {␊ |
458 | #if defined(CHECK_STATE)␊ |
459 | ␉qWarning( "QFile::at: File is not open" );␊ |
460 | #endif␊ |
461 | ␉return FALSE;␊ |
462 | }␊ |
463 | bool ok;␊ |
464 | if ( isRaw() ) {␉␉␉␉// raw file␊ |
465 | ␉pos = (int)LSEEK(fd, pos, SEEK_SET);␊ |
466 | ␉ok = pos != -1;␊ |
467 | } else {␉␉␉␉␉// buffered file␊ |
468 | ␉ok = fseek(fh, pos, SEEK_SET) == 0;␊ |
469 | }␊ |
470 | if ( ok )␊ |
471 | ␉ioIndex = pos;␊ |
472 | #if defined(CHECK_RANGE)␊ |
473 | else␊ |
474 | ␉qWarning( "QFile::at: Cannot set file position %d", pos );␊ |
475 | #endif␊ |
476 | return ok;␊ |
477 | }␊ |
478 | ␊ |
479 | /*!␊ |
480 | Reads at most \e len bytes from the file into \e p and returns the␊ |
481 | number of bytes actually read.␊ |
482 | ␊ |
483 | Returns -1 if a serious error occurred.␊ |
484 | ␊ |
485 | \warning We have experienced problems with some C libraries when a buffered␊ |
486 | file is opened for both reading and writing. If a read operation takes place␊ |
487 | immediately after a write operation, the read buffer contains garbage data.␊ |
488 | Worse, the same garbage is written to the file. Calling flush() before␊ |
489 | readBlock() solved this problem.␊ |
490 | ␊ |
491 | \sa writeBlock()␊ |
492 | */␊ |
493 | ␊ |
494 | int QFile::readBlock( char *p, uint len )␊ |
495 | {␊ |
496 | #if defined(CHECK_NULL)␊ |
497 | if ( !p )␊ |
498 | ␉qWarning( "QFile::readBlock: Null pointer error" );␊ |
499 | #endif␊ |
500 | #if defined(CHECK_STATE)␊ |
501 | if ( !isOpen() ) {␉␉␉␉// file not open␊ |
502 | ␉qWarning( "QFile::readBlock: File not open" );␊ |
503 | ␉return -1;␊ |
504 | }␊ |
505 | if ( !isReadable() ) {␉␉␉// reading not permitted␊ |
506 | ␉qWarning( "QFile::readBlock: Read operation not permitted" );␊ |
507 | ␉return -1;␊ |
508 | }␊ |
509 | #endif␊ |
510 | int nread;␉␉␉␉␉// number of bytes read␊ |
511 | if ( isRaw() ) {␉␉␉␉// raw file␊ |
512 | ␉nread = READ( fd, p, len );␊ |
513 | ␉if ( len && nread <= 0 ) {␊ |
514 | ␉ nread = 0;␊ |
515 | ␉ setStatus(IO_ReadError);␊ |
516 | ␉}␊ |
517 | } else {␉␉␉␉␉// buffered file␊ |
518 | ␉nread = fread( p, 1, len, fh );␊ |
519 | ␉if ( (uint)nread != len ) {␊ |
520 | ␉ if ( ferror( fh ) || nread==0 )␊ |
521 | ␉␉setStatus(IO_ReadError);␊ |
522 | ␉}␊ |
523 | }␊ |
524 | ioIndex += nread;␊ |
525 | return nread;␊ |
526 | }␊ |
527 | ␊ |
528 | /*! \overload int writeBlock( const QByteArray& data )␊ |
529 | */␊ |
530 | ␊ |
531 | /*! \reimp␊ |
532 | ␊ |
533 | Writes \e len bytes from \e p to the file and returns the number of␊ |
534 | bytes actually written.␊ |
535 | ␊ |
536 | Returns -1 if a serious error occurred.␊ |
537 | ␊ |
538 | \warning When working with buffered files, data may not be written␊ |
539 | to the file at once. Call flush() to make sure the data is really␊ |
540 | written.␊ |
541 | ␊ |
542 | \sa readBlock()␊ |
543 | */␊ |
544 | ␊ |
545 | int QFile::writeBlock( const char *p, uint len )␊ |
546 | {␊ |
547 | #if defined(CHECK_NULL)␊ |
548 | if ( p == 0 && len != 0 )␊ |
549 | ␉qWarning( "QFile::writeBlock: Null pointer error" );␊ |
550 | #endif␊ |
551 | #if defined(CHECK_STATE)␊ |
552 | if ( !isOpen() ) {␉␉␉␉// file not open␊ |
553 | ␉qWarning( "QFile::writeBlock: File not open" );␊ |
554 | ␉return -1;␊ |
555 | }␊ |
556 | if ( !isWritable() ) {␉␉␉// writing not permitted␊ |
557 | ␉qWarning( "QFile::writeBlock: Write operation not permitted" );␊ |
558 | ␉return -1;␊ |
559 | }␊ |
560 | #endif␊ |
561 | int nwritten;␉␉␉␉// number of bytes written␊ |
562 | if ( isRaw() )␉␉␉␉// raw file␊ |
563 | ␉nwritten = WRITE( fd, p, len );␊ |
564 | else␉␉␉␉␉// buffered file␊ |
565 | ␉nwritten = fwrite( p, 1, len, fh );␊ |
566 | if ( nwritten != (int)len ) {␉␉// write error␊ |
567 | ␉if ( errno == ENOSPC )␉␉␉// disk is full␊ |
568 | ␉ setStatus( IO_ResourceError );␊ |
569 | ␉else␊ |
570 | ␉ setStatus( IO_WriteError );␊ |
571 | ␉if ( isRaw() )␉␉␉␉// recalc file position␊ |
572 | ␉ ioIndex = (int)LSEEK( fd, 0, SEEK_CUR );␊ |
573 | ␉else␊ |
574 | ␉ ioIndex = fseek( fh, 0, SEEK_CUR );␊ |
575 | } else {␊ |
576 | ␉ioIndex += nwritten;␊ |
577 | }␊ |
578 | if ( ioIndex > length )␉␉␉// update file length␊ |
579 | ␉length = ioIndex;␊ |
580 | return nwritten;␊ |
581 | }␊ |
582 | ␊ |
583 | /*!␊ |
584 | Returns the file handle of the file.␊ |
585 | ␊ |
586 | This is a small positive integer, suitable for use with C library␊ |
587 | functions such as fdopen() and fcntl(), as well as with QSocketNotifier.␊ |
588 | ␊ |
589 | If the file is not open or there is an error, handle() returns -1.␊ |
590 | ␊ |
591 | \sa QSocketNotifier␊ |
592 | */␊ |
593 | ␊ |
594 | int QFile::handle() const␊ |
595 | {␊ |
596 | if ( !isOpen() )␊ |
597 | ␉return -1;␊ |
598 | else if ( fh )␊ |
599 | ␉return FILENO( fh );␊ |
600 | else␊ |
601 | ␉return fd;␊ |
602 | }␊ |
603 | ␊ |
604 | /*!␊ |
605 | Closes an open file.␊ |
606 | ␊ |
607 | The file is not closed if it was opened with an existing file handle.␊ |
608 | If the existing file handle is a \c FILE*, the file is flushed.␊ |
609 | If the existing file handle is an \c int file descriptor, nothing␊ |
610 | is done to the file.␊ |
611 | ␊ |
612 | Some "write-behind" filesystems may report an unspecified error on␊ |
613 | closing the file. These errors only indicate that something may␊ |
614 | have gone wrong since the previous open(). In such a case status()␊ |
615 | reports IO_UnspecifiedError after close(), otherwise IO_Ok.␊ |
616 | ␊ |
617 | \sa open(), flush()␊ |
618 | */␊ |
619 | ␊ |
620 | ␊ |
621 | void QFile::close()␊ |
622 | {␊ |
623 | bool ok = FALSE;␊ |
624 | if ( isOpen() ) {␉␉␉␉// file is not open␊ |
625 | ␉if ( fh ) {␉␉␉␉// buffered file␊ |
626 | ␉ if ( ext_f )␊ |
627 | ␉␉ok = fflush( fh ) != -1;␉// flush instead of closing␊ |
628 | ␉ else␊ |
629 | ␉␉ok = fclose( fh ) != -1;␊ |
630 | ␉} else {␉␉␉␉// raw file␊ |
631 | ␉ if ( ext_f )␊ |
632 | ␉␉ok = TRUE;␉␉␉// cannot close␊ |
633 | ␉ else␊ |
634 | ␉␉ok = CLOSE( fd ) != -1;␊ |
635 | ␉}␊ |
636 | ␉init();␉␉␉␉␉// restore internal state␊ |
637 | }␊ |
638 | if (!ok)␊ |
639 | ␉setStatus (IO_UnspecifiedError);␊ |
640 | ␊ |
641 | return;␊ |
642 | }␊ |
643 | ␊ |
644 | int64 QFile::pos() const␊ |
645 | {␊ |
646 | if (isOpen())␊ |
647 | {␊ |
648 | // TODO: support 64 bit size␊ |
649 | return ftell( fh );␊ |
650 | }␊ |
651 | return -1;␊ |
652 | }␊ |
653 | ␊ |
654 | int64 QFile::toEnd() ␊ |
655 | {␊ |
656 | if (isOpen())␊ |
657 | {␊ |
658 | // TODO: support 64 bit size␊ |
659 | if (fseek( fh, 0, SEEK_END )!=-1)␊ |
660 | {␊ |
661 | return ftell( fh );␊ |
662 | }␊ |
663 | }␊ |
664 | return -1;␊ |
665 | }␊ |
666 | ␊ |
667 | bool QFile::seek( int64 pos )␊ |
668 | {␊ |
669 | if (isOpen())␊ |
670 | {␊ |
671 | // TODO: support 64 bit size␊ |
672 | return fseek( fh, pos, SEEK_SET )!=-1;␊ |
673 | }␊ |
674 | return FALSE;␊ |
675 | }␊ |
676 | ␊ |
677 | ␊ |
678 | ␊ |
679 |