1/*
2 This file is part of the KDE libraries
3 SPDX-FileCopyrightText: 1999 David Faure <faure@kde.org>
4 SPDX-FileCopyrightText: 2002-2003 Waldo Bastian <bastian@kde.org>
5
6 SPDX-License-Identifier: LGPL-2.0-only
7*/
8
9#include "kbuildsycoca_p.h"
10#include "ksycoca_p.h"
11#include "ksycocaresourcelist_p.h"
12#include "ksycocautils_p.h"
13#include "sycocadebug.h"
14#include "vfolder_menu_p.h"
15
16#include "kbuildmimetypefactory_p.h"
17#include "kbuildservicefactory_p.h"
18#include "kbuildservicegroupfactory_p.h"
19#include "kctimefactory_p.h"
20#include <QDataStream>
21#include <QDateTime>
22#include <QDebug>
23#include <QDir>
24#include <QDirIterator>
25#include <QEventLoop>
26#include <QFile>
27#include <QLocale>
28#include <QSaveFile>
29#include <QTimer>
30#include <config-ksycoca.h>
31#include <kservice.h>
32#include <kservicegroup.h>
33
34#include <kmemfile_p.h>
35
36#include <QLockFile>
37#include <QStandardPaths>
38#include <qplatformdefs.h>
39
40static const char *s_cSycocaPath = nullptr;
41
42KBuildSycocaInterface::~KBuildSycocaInterface()
43{
44}
45
46KBuildSycoca::KBuildSycoca()
47 : KSycoca(true)
48 , m_allEntries(nullptr)
49 , m_ctimeFactory(nullptr)
50 , m_ctimeDict(nullptr)
51 , m_currentEntryDict(nullptr)
52 , m_serviceGroupEntryDict(nullptr)
53 , m_vfolder(nullptr)
54 , m_newTimestamp(0)
55 , m_menuTest(false)
56 , m_changed(false)
57{
58}
59
60KBuildSycoca::~KBuildSycoca()
61{
62 // Delete the factories while we exist, so that the virtual isBuilding() still works
63 qDeleteAll(c: *factories());
64 factories()->clear();
65}
66
67KSycocaEntry::Ptr KBuildSycoca::createEntry(KSycocaFactory *currentFactory, const QString &file)
68{
69 quint32 timeStamp = m_ctimeFactory->dict()->ctime(path: file, resource: m_resource);
70 if (!timeStamp) {
71 timeStamp = calcResourceHash(subdir: m_resourceSubdir, filename: file);
72 if (!timeStamp) { // file disappeared meanwhile
73 return {};
74 }
75 }
76 KSycocaEntry::Ptr entry;
77 if (m_allEntries) {
78 Q_ASSERT(m_ctimeDict);
79 quint32 oldTimestamp = m_ctimeDict->ctime(path: file, resource: m_resource);
80 if (file.contains(s: QLatin1String("fake"))) {
81 qCDebug(SYCOCA) << "m_ctimeDict->ctime(" << file << ") = " << oldTimestamp << "compared with" << timeStamp;
82 }
83
84 if (timeStamp && (timeStamp == oldTimestamp)) {
85 // Re-use old entry
86 if (currentFactory == d->m_serviceFactory) { // Strip .directory from service-group entries
87 entry = m_currentEntryDict->value(key: file.left(n: file.length() - 10));
88 } else {
89 entry = m_currentEntryDict->value(key: file);
90 }
91 // remove from m_ctimeDict; if m_ctimeDict is not empty
92 // after all files have been processed, it means
93 // some files were removed since last time
94 if (file.contains(s: QLatin1String("fake"))) {
95 qCDebug(SYCOCA) << "reusing (and removing) old entry for:" << file << "entry=" << entry;
96 }
97 m_ctimeDict->remove(path: file, resource: m_resource);
98 } else if (oldTimestamp) {
99 m_changed = true;
100 m_ctimeDict->remove(path: file, resource: m_resource);
101 qCDebug(SYCOCA) << "modified:" << file;
102 } else {
103 m_changed = true;
104 qCDebug(SYCOCA) << "new:" << file;
105 }
106 }
107 m_ctimeFactory->dict()->addCTime(path: file, resource: m_resource, ctime: timeStamp);
108 if (!entry) {
109 // Create a new entry
110 entry = currentFactory->createEntry(file);
111 }
112 if (entry && entry->isValid()) {
113 return entry;
114 }
115 return KSycocaEntry::Ptr();
116}
117
118KService::Ptr KBuildSycoca::createService(const QString &path)
119{
120 KSycocaEntry::Ptr entry = createEntry(currentFactory: d->m_serviceFactory, file: path);
121 if (entry) {
122 m_tempStorage.append(t: entry);
123 }
124 return KService::Ptr(static_cast<KService *>(entry.data()));
125}
126
127// returns false if the database is up to date, true if it needs to be saved
128bool KBuildSycoca::build()
129{
130 using KBSEntryDictList = QList<KBSEntryDict *>;
131 KBSEntryDictList entryDictList;
132 KBSEntryDict *serviceEntryDict = nullptr;
133
134 // Convert for each factory the entryList to a Dict.
135 entryDictList.reserve(asize: factories()->size());
136 int i = 0;
137 // For each factory
138 const auto &factoryList = *factories();
139 for (KSycocaFactory *factory : factoryList) {
140 KBSEntryDict *entryDict = new KBSEntryDict;
141 if (m_allEntries) { // incremental build
142 for (const KSycocaEntry::Ptr &entry : std::as_const(t: (*m_allEntries).at(i: i++))) {
143 // if (entry->entryPath().contains("fake"))
144 // qCDebug(SYCOCA) << "inserting into entryDict:" << entry->entryPath() << entry;
145 entryDict->insert(key: entry->entryPath(), value: entry);
146 }
147 }
148 if (factory == d->m_serviceFactory) {
149 serviceEntryDict = entryDict;
150 } else if (factory == m_buildServiceGroupFactory) {
151 m_serviceGroupEntryDict = entryDict;
152 }
153 entryDictList.append(t: entryDict);
154 }
155
156 // Save the mtime of each dir, just before we list them
157 // ## should we convert to UTC to avoid surprises when summer time kicks in?
158 const auto lstDirs = factoryResourceDirs();
159 for (const QString &dir : lstDirs) {
160 qint64 stamp = 0;
161 KSycocaUtilsPrivate::visitResourceDirectory(dirname: dir, visitor: [&stamp](const QFileInfo &info) {
162 stamp = qMax(a: stamp, b: info.lastModified().toMSecsSinceEpoch());
163 return true;
164 });
165 m_allResourceDirs.insert(key: dir, value: stamp);
166 }
167
168 const auto lstFiles = factoryExtraFiles();
169 for (const QString &file : lstFiles) {
170 m_extraFiles.insert(key: file, value: QFileInfo(file).lastModified().toMSecsSinceEpoch());
171 }
172
173 QMap<QString, QByteArray> allResourcesSubDirs; // dirs, kstandarddirs-resource-name
174 // For each factory
175 for (KSycocaFactory *factory : factoryList) {
176 // For each resource the factory deals with
177 const KSycocaResourceList resourceList = factory->resourceList();
178 for (const KSycocaResource &res : resourceList) {
179 // With this we would get dirs, but not a unique list of relative files (for global+local merging to work)
180 // const QStringList dirs = QStandardPaths::locateAll(QStandardPaths::GenericDataLocation, res.subdir, QStandardPaths::LocateDirectory);
181 // allResourcesSubDirs[res.resource] += dirs;
182 allResourcesSubDirs.insert(key: res.subdir, value: res.resource);
183 }
184 }
185
186 m_ctimeFactory = new KCTimeFactory(this); // This is a build factory too, don't delete!!
187 for (auto it1 = allResourcesSubDirs.cbegin(); it1 != allResourcesSubDirs.cend(); ++it1) {
188 m_changed = false;
189 m_resourceSubdir = it1.key();
190 m_resource = it1.value();
191
192 QSet<QString> relFiles;
193 const QStringList dirs = QStandardPaths::locateAll(type: QStandardPaths::GenericDataLocation, fileName: m_resourceSubdir, options: QStandardPaths::LocateDirectory);
194 qCDebug(SYCOCA) << "Looking for subdir" << m_resourceSubdir << "=>" << dirs;
195 for (const QString &dir : dirs) {
196 QDirIterator it(dir, QDirIterator::Subdirectories | QDirIterator::FollowSymlinks);
197 while (it.hasNext()) {
198 const QString filePath = it.next();
199 Q_ASSERT(filePath.startsWith(dir)); // due to the line below...
200 const QString relPath = filePath.mid(position: dir.length() + 1);
201 relFiles.insert(value: relPath);
202 }
203 }
204 // Now find all factories that use this resource....
205 // For each factory -- and its corresponding entryDict (iterate over both lists in parallel)
206 for (int f = 0; f < factoryList.count(); ++f) {
207 KSycocaFactory *currentFactory = factoryList.at(i: f);
208 // m_ctimeInfo gets created after the initial loop, so it has no entryDict.
209 m_currentEntryDict = f == entryDictList.size() ? nullptr : entryDictList.at(i: f);
210 // For each resource the factory deals with
211 const KSycocaResourceList &resourceList = currentFactory->resourceList();
212 for (const KSycocaResource &res : resourceList) {
213 if (res.resource != m_resource) {
214 continue;
215 }
216
217 // For each file in the resource
218 for (const QString &entryPath : std::as_const(t&: relFiles)) {
219 // Check if file matches filter
220 if (entryPath.endsWith(s: res.extension)) {
221 KSycocaEntry::Ptr entry = createEntry(currentFactory, file: entryPath);
222 if (entry) {
223 currentFactory->addEntry(newEntry: entry);
224 }
225 }
226 }
227 }
228 }
229 }
230
231 bool result = true;
232 const bool createVFolder = true; // we need to always run the VFolderMenu code
233 if (createVFolder || m_menuTest) {
234 m_resource = "apps";
235 m_resourceSubdir = QStringLiteral("applications");
236 m_currentEntryDict = serviceEntryDict;
237 m_changed = false;
238
239 m_vfolder = new VFolderMenu(d->m_serviceFactory, this);
240 if (!m_trackId.isEmpty()) {
241 m_vfolder->setTrackId(m_trackId);
242 }
243
244 VFolderMenu::SubMenu *kdeMenu = m_vfolder->parseMenu(QStringLiteral("applications.menu"));
245
246 KServiceGroup::Ptr entry = m_buildServiceGroupFactory->addNew(QStringLiteral("/"), file: kdeMenu->directoryFile, entry: KServiceGroup::Ptr(), isDeleted: false);
247 entry->setLayoutInfo(kdeMenu->layoutList);
248 createMenu(caption: QString(), name: QString(), menu: kdeMenu);
249
250 // Storing the mtime *after* looking at these dirs is a tiny race condition,
251 // but I'm not sure how to get the vfolder dirs upfront...
252 const auto allDirectories = m_vfolder->allDirectories();
253 for (QString dir : allDirectories) {
254 if (dir.endsWith(c: QLatin1Char('/'))) {
255 dir.chop(n: 1); // remove trailing slash, to avoid having ~/.local/share/applications twice
256 }
257 if (!m_allResourceDirs.contains(key: dir)) {
258 qint64 stamp = 0;
259 KSycocaUtilsPrivate::visitResourceDirectory(dirname: dir, visitor: [&stamp](const QFileInfo &info) {
260 stamp = qMax(a: stamp, b: info.lastModified().toMSecsSinceEpoch());
261 return true;
262 });
263 m_allResourceDirs.insert(key: dir, value: stamp);
264 }
265 }
266
267 if (m_menuTest) {
268 result = false;
269 }
270 }
271
272 if (m_ctimeDict && !m_ctimeDict->isEmpty()) {
273 qCDebug(SYCOCA) << "Still in time dict:";
274 m_ctimeDict->dump();
275 }
276
277 qDeleteAll(c: entryDictList);
278 return result;
279}
280
281void KBuildSycoca::createMenu(const QString &caption_, const QString &name_, VFolderMenu::SubMenu *menu)
282{
283 QString caption = caption_;
284 QString name = name_;
285 for (VFolderMenu::SubMenu *subMenu : std::as_const(t&: menu->subMenus)) {
286 QString subName = name + subMenu->name + QLatin1Char('/');
287
288 QString directoryFile = subMenu->directoryFile;
289 if (directoryFile.isEmpty()) {
290 directoryFile = subName + QLatin1String(".directory");
291 }
292 quint32 timeStamp = m_ctimeFactory->dict()->ctime(path: directoryFile, resource: m_resource);
293 if (!timeStamp) {
294 timeStamp = calcResourceHash(subdir: m_resourceSubdir, filename: directoryFile);
295 }
296
297 KServiceGroup::Ptr entry;
298 if (m_allEntries) {
299 const quint32 oldTimestamp = m_ctimeDict->ctime(path: directoryFile, resource: m_resource);
300
301 if (timeStamp && (timeStamp == oldTimestamp)) {
302 KSycocaEntry::Ptr group = m_serviceGroupEntryDict->value(key: subName);
303 if (group) {
304 entry = KServiceGroup::Ptr(static_cast<KServiceGroup *>(group.data()));
305 if (entry->directoryEntryPath() != directoryFile) {
306 entry = nullptr; // Can't reuse this one!
307 }
308 }
309 }
310 }
311 if (timeStamp) { // bug? (see calcResourceHash). There might not be a .directory file...
312 m_ctimeFactory->dict()->addCTime(path: directoryFile, resource: m_resource, ctime: timeStamp);
313 }
314
315 entry = m_buildServiceGroupFactory->addNew(menuName: subName, file: subMenu->directoryFile, entry, isDeleted: subMenu->isDeleted);
316 entry->setLayoutInfo(subMenu->layoutList);
317 if (!(m_menuTest && entry->noDisplay())) {
318 createMenu(caption_: caption + entry->caption() + QLatin1Char('/'), name_: subName, menu: subMenu);
319 }
320 }
321 if (caption.isEmpty()) {
322 caption += QLatin1Char('/');
323 }
324 if (name.isEmpty()) {
325 name += QLatin1Char('/');
326 }
327 for (const KService::Ptr &p : std::as_const(t&: menu->items)) {
328 if (m_menuTest) {
329 if (!menu->isDeleted && !p->noDisplay()) {
330 printf(format: "%s\t%s\t%s\n",
331 qPrintable(caption),
332 qPrintable(p->menuId()),
333 qPrintable(QStandardPaths::locate(QStandardPaths::ApplicationsLocation, p->entryPath())));
334 }
335 } else {
336 m_buildServiceGroupFactory->addNewEntryTo(menuName: name, newEntry: p);
337 }
338 }
339}
340
341bool KBuildSycoca::recreate(bool incremental)
342{
343 QFileInfo fi(KSycoca::absoluteFilePath());
344 if (!QDir().mkpath(dirPath: fi.absolutePath())) {
345 qCWarning(SYCOCA) << "Couldn't create" << fi.absolutePath();
346 return false;
347 }
348 QString path(fi.absoluteFilePath());
349
350 QLockFile lockFile(path + QLatin1String(".lock"));
351 if (!lockFile.tryLock()) {
352 qCDebug(SYCOCA) << "Waiting for already running" << KBUILDSYCOCA_EXENAME << "to finish.";
353 if (!lockFile.lock()) {
354 qCWarning(SYCOCA) << "Couldn't lock" << path + QLatin1String(".lock");
355 return false;
356 }
357 if (!needsRebuild()) {
358 // qCDebug(SYCOCA) << "Up-to-date, skipping.";
359 return true;
360 }
361 }
362
363 QByteArray qSycocaPath = QFile::encodeName(fileName: path);
364 s_cSycocaPath = qSycocaPath.data();
365
366 m_allEntries = nullptr;
367 m_ctimeDict = nullptr;
368 if (incremental && checkGlobalHeader()) {
369 qCDebug(SYCOCA) << "Reusing existing ksycoca";
370 KSycoca *oldSycoca = KSycoca::self();
371 m_allEntries = new KSycocaEntryListList;
372 m_ctimeDict = new KCTimeDict;
373
374 // Must be in same order as in KBuildSycoca::recreate()!
375 m_allEntries->append(t: KSycocaPrivate::self()->mimeTypeFactory()->allEntries());
376 m_allEntries->append(t: KSycocaPrivate::self()->serviceGroupFactory()->allEntries());
377 m_allEntries->append(t: KSycocaPrivate::self()->serviceFactory()->allEntries());
378
379 KCTimeFactory *ctimeInfo = new KCTimeFactory(oldSycoca);
380 *m_ctimeDict = ctimeInfo->loadDict();
381 }
382 s_cSycocaPath = nullptr;
383
384 QSaveFile database(path);
385 bool openedOK = database.open(flags: QIODevice::WriteOnly);
386
387 if (!openedOK && database.error() == QFile::WriteError && QFile::exists(fileName: path)) {
388 QFile::remove(fileName: path);
389 openedOK = database.open(flags: QIODevice::WriteOnly);
390 }
391 if (!openedOK) {
392 qCWarning(SYCOCA) << "ERROR creating database" << path << ":" << database.errorString();
393 return false;
394 }
395
396 QDataStream *str = new QDataStream(&database);
397 str->setVersion(QDataStream::Qt_5_3);
398
399 m_newTimestamp = QDateTime::currentMSecsSinceEpoch();
400 qCDebug(SYCOCA).nospace() << "Recreating ksycoca file (" << path << ", version " << KSycoca::version() << ")";
401
402 KBuildMimeTypeFactory *buildMimeTypeFactory = new KBuildMimeTypeFactory(this);
403 d->m_mimeTypeFactory = buildMimeTypeFactory;
404 m_buildServiceGroupFactory = new KBuildServiceGroupFactory(this);
405 d->m_serviceGroupFactory = m_buildServiceGroupFactory;
406 d->m_serviceFactory = new KBuildServiceFactory(buildMimeTypeFactory);
407
408 if (build()) { // Parse dirs
409 save(str); // Save database
410 if (str->status() != QDataStream::Ok) { // Probably unnecessary now in Qt5, since QSaveFile detects write errors
411 database.cancelWriting(); // Error
412 }
413 delete str;
414 str = nullptr;
415
416 // if we are currently via sudo, preserve the original owner
417 // as $HOME may also be that of another user rather than /root
418#ifdef Q_OS_UNIX
419 if (qEnvironmentVariableIsSet(varName: "SUDO_UID")) {
420 const int uid = qEnvironmentVariableIntValue(varName: "SUDO_UID");
421 const int gid = qEnvironmentVariableIntValue(varName: "SUDO_GID");
422 if (uid && gid) {
423 int ret;
424 ret = fchown(fd: database.handle(), owner: uid, group: gid);
425 if (ret < 0) {
426 qCWarning(SYCOCA) << "ERROR changing ownership of database" << database.fileName() << strerror(errno);
427 return false;
428 }
429 }
430 }
431#endif
432
433 if (!database.commit()) {
434 qCWarning(SYCOCA) << "ERROR writing database" << database.fileName() << database.errorString();
435 return false;
436 }
437 } else {
438 delete str;
439 str = nullptr;
440 database.cancelWriting();
441 if (m_menuTest) {
442 return true;
443 }
444 qCDebug(SYCOCA) << "Database is up to date";
445 }
446
447#ifndef QT_NO_SHAREDMEMORY
448 if (d->m_sycocaStrategy == KSycocaPrivate::StrategyMemFile) {
449 KMemFile::fileContentsChanged(filename: path);
450 }
451#endif
452
453 delete m_ctimeDict;
454 delete m_allEntries;
455 delete m_vfolder;
456
457 return true;
458}
459
460void KBuildSycoca::save(QDataStream *str)
461{
462 // Write header (#pass 1)
463 str->device()->seek(pos: 0);
464
465 (*str) << qint32(KSycoca::version());
466 // KSycocaFactory * servicetypeFactory = 0;
467 // KBuildMimeTypeFactory * mimeTypeFactory = 0;
468 KBuildServiceFactory *serviceFactory = nullptr;
469 auto lst = *factories();
470 for (KSycocaFactory *factory : std::as_const(t&: lst)) {
471 qint32 aId;
472 qint32 aOffset;
473 aId = factory->factoryId();
474 // if ( aId == KST_KServiceTypeFactory )
475 // servicetypeFactory = factory;
476 // else if ( aId == KST_KMimeTypeFactory )
477 // mimeTypeFactory = static_cast<KBuildMimeTypeFactory *>( factory );
478 if (aId == KST_KServiceFactory) {
479 serviceFactory = static_cast<KBuildServiceFactory *>(factory);
480 }
481 aOffset = factory->offset(); // not set yet, so always 0
482 (*str) << aId;
483 (*str) << aOffset;
484 }
485 (*str) << qint32(0); // No more factories.
486 // Write XDG_DATA_DIRS
487 (*str) << QStandardPaths::standardLocations(type: QStandardPaths::GenericDataLocation).join(sep: QString(QLatin1Char(':')));
488 (*str) << m_newTimestamp;
489 (*str) << QLocale().bcp47Name();
490 // This makes it possible to trigger a ksycoca update for all users (KIOSK feature)
491 (*str) << calcResourceHash(QStringLiteral("kservices6"), QStringLiteral("update_ksycoca"));
492 (*str) << m_allResourceDirs.keys();
493 for (auto it = m_allResourceDirs.constBegin(); it != m_allResourceDirs.constEnd(); ++it) {
494 (*str) << it.value();
495 }
496 (*str) << m_extraFiles.keys();
497 for (auto it = m_extraFiles.constBegin(); it != m_extraFiles.constEnd(); ++it) {
498 (*str) << it.value();
499 }
500
501 // Calculate per-servicetype/MIME type data
502 if (serviceFactory) {
503 serviceFactory->postProcessServices();
504 }
505
506 // Here so that it's the last debug message
507 qCDebug(SYCOCA) << "Saving";
508
509 // Write factory data....
510 lst = *factories();
511 for (KSycocaFactory *factory : std::as_const(t&: lst)) {
512 factory->save(str&: *str);
513 if (str->status() != QDataStream::Ok) { // ######## TODO: does this detect write errors, e.g. disk full?
514 return; // error
515 }
516 }
517
518 qint64 endOfData = str->device()->pos();
519
520 // Write header (#pass 2)
521 str->device()->seek(pos: 0);
522
523 (*str) << qint32(KSycoca::version());
524 lst = *factories();
525 for (KSycocaFactory *factory : std::as_const(t&: lst)) {
526 qint32 aId;
527 qint32 aOffset;
528 aId = factory->factoryId();
529 aOffset = factory->offset();
530 (*str) << aId;
531 (*str) << aOffset;
532 }
533 (*str) << qint32(0); // No more factories.
534
535 // Jump to end of database
536 str->device()->seek(pos: endOfData);
537}
538
539QStringList KBuildSycoca::factoryResourceDirs()
540{
541 static QStringList *dirs = nullptr;
542 if (dirs != nullptr) {
543 return *dirs;
544 }
545 dirs = new QStringList;
546 // these are all resource dirs cached by ksycoca
547 *dirs += KMimeTypeFactory::resourceDirs();
548 *dirs += KServiceFactory::resourceDirs();
549
550 return *dirs;
551}
552
553QStringList KBuildSycoca::factoryExtraFiles()
554{
555 QStringList files;
556 // these are the extra files cached by ksycoca
557 // and whose timestamps are checked
558 files += KMimeAssociations::mimeAppsFiles();
559
560 return files;
561}
562
563QStringList KBuildSycoca::existingResourceDirs()
564{
565 static QStringList *dirs = nullptr;
566 if (dirs != nullptr) {
567 return *dirs;
568 }
569 dirs = new QStringList(factoryResourceDirs());
570
571 auto checkDir = [](const QString &str) {
572 QFileInfo info(str);
573 return !info.exists() || !info.isReadable();
574 };
575 dirs->erase(abegin: std::remove_if(first: dirs->begin(), last: dirs->end(), pred: checkDir), aend: dirs->end());
576
577 return *dirs;
578}
579
580static quint32 updateHash(const QString &file, quint32 hash)
581{
582 QFileInfo fi(file);
583 if (fi.isReadable() && fi.isFile()) {
584 // This was using buff.st_ctime (in Waldo's initial commit to kstandarddirs.cpp in 2001), but that looks wrong?
585 // Surely we want to catch manual editing, while a chmod doesn't matter much?
586 qint64 timestamp = fi.lastModified().toSecsSinceEpoch();
587 // On some systems (i.e. Fedora Kinoite), all files in /usr have a last
588 // modified timestamp of 0 (UNIX Epoch). In this case, always assume
589 // the file as been changed.
590 if (timestamp == 0) {
591 static qint64 now = QDateTime::currentDateTimeUtc().toSecsSinceEpoch();
592 timestamp = now;
593 }
594 hash += timestamp;
595 }
596 return hash;
597}
598
599quint32 KBuildSycoca::calcResourceHash(const QString &resourceSubDir, const QString &filename)
600{
601 quint32 hash = 0;
602 if (!QDir::isRelativePath(path: filename)) {
603 return updateHash(file: filename, hash);
604 }
605 const QString filePath = resourceSubDir + QLatin1Char('/') + filename;
606 const QString qrcFilePath = QStringLiteral(":/") + filePath;
607 const QStringList files =
608 QFileInfo::exists(file: qrcFilePath) ? QStringList{qrcFilePath} : QStandardPaths::locateAll(type: QStandardPaths::GenericDataLocation, fileName: filePath);
609 for (const QString &file : files) {
610 hash = updateHash(file, hash);
611 }
612 if (hash == 0 && !filename.endsWith(s: QLatin1String("update_ksycoca"))
613 && !filename.endsWith(s: QLatin1String(".directory")) // bug? needs investigation from someone who understands the VFolder spec
614 ) {
615 if (files.isEmpty()) {
616 // This can happen if the file was deleted between directory listing and the above locateAll
617 qCDebug(SYCOCA) << "File not found anymore:" << filename << " -- probably deleted meanwhile";
618 } else {
619 // This can happen if the file was deleted between locateAll and QFileInfo
620 qCDebug(SYCOCA) << "File(s) found but not readable (or disappeared meanwhile)" << files;
621 }
622 }
623 return hash;
624}
625
626bool KBuildSycoca::checkGlobalHeader()
627{
628 // Since it's part of the filename, we are 99% sure that the locale and prefixes will match.
629 const QString current_language = QLocale().bcp47Name();
630 const quint32 current_update_sig = KBuildSycoca::calcResourceHash(QStringLiteral("kservices6"), QStringLiteral("update_ksycoca"));
631 const QString current_prefixes = QStandardPaths::standardLocations(type: QStandardPaths::GenericDataLocation).join(sep: QString(QLatin1Char(':')));
632
633 const KSycocaHeader header = KSycocaPrivate::self()->readSycocaHeader();
634 Q_ASSERT(!header.prefixes.split(QLatin1Char(':')).contains(QDir::homePath()));
635
636 return (current_update_sig == header.updateSignature) //
637 && (current_language == header.language) //
638 && (current_prefixes == header.prefixes) //
639 && (header.timeStamp != 0);
640}
641
642const char *KBuildSycoca::sycocaPath()
643{
644 return s_cSycocaPath;
645}
646
647#include "moc_kbuildsycoca_p.cpp"
648

source code of kservice/src/sycoca/kbuildsycoca.cpp