This allows us to make sure that the PID we read is from the same boot
as we are right now running. The collision could happen on embedded
systems where the boot sequence is fixed, so all the same processes
would have the exact same PIDs after reboot as they did before.
[ChangeLog][QtCore][QLockFile] QLockFile can now properly conclude that
a lock file from a previous boot of the same device is stale and can be
removed. This is implemented only for Linux and Apple operating systems.
Task-number: QTBUG-63425
Change-Id: I0b48fc8e90304e0dacc3fffd14e8e3a197211788
Reviewed-by: Kai Koehne <kai.koehne@qt.io>
We duplicated both the creation of the contents and the check if the
file was stale. Centralize everything in qlockfile.cpp.
Change-Id: I0b48fc8e90304e0dacc3fffd14e91174af79841f
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
F_SETLK is bad. Explanation in the comment. And flock(2) does work with
NFS on Linux, so let's just stick to that, which is simpler.
We only use the file locks when we attempt to delete an apparently stale
lock: that is, for a lock file that is at least staleLockTime old.
Change-Id: I0b48fc8e90304e0dacc3fffd14e908c8c4c9d59b
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: David Faure <david.faure@kdab.com>
This deduplicates the code between QFileSystemEngine and QLockFile.
Change-Id: I1eba2b016de74620bfc8fffd14cd005d5fd9beaa
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@qt.io>
I'll need it soon in QTemporaryFile. This also reduces the overhead,
since QFile::exists -> QFileInfo::exists needs to check if there's a
file engine that handles "/proc/version" (there isn't), convert the
UTF-16 filename to UTF-8 and QFileSystemEngine::fillMetaData will issue
a more expensive stat(2) syscall.
access(2) is cheaper.
This commit also introduces QT_LINUX_ALWAYS_HAVE_PROCFS that isn't
defined anywhere, but could be passed during configure with -D if a
build wants it.
Change-Id: I1eba2b016de74620bfc8fffd14ccfd1593d59ade
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Stale Lock files in the future can happen in some situations. For exemple
two computers with different clocks access the same file system. It could
be that one of the timestamp is totaly off (several years into the future).
[ChangeLog][QtCore][QLockFile] Fixed a deadlock occurring if a corrupted
lock file's modification time is in the future.
Change-Id: I8dac98a0e898c76bcef67f8c195e126c996b6add
Reviewed-by: David Faure <david.faure@kdab.com>
We chose to use UTF-8 as it allows us to ensure there's no mistaking the
hostname in case the locale is changed, if the host name contains
characters outside of US-ASCII.
But this didn't work because the code that wrote the hostname always
used the local 8-bit codec instead of UTF-8. On Unix, we used the
result of gethostname(3) directly, which is supposedly on the locale codec.
This commit doesn't fix Windows, which requires _wgetenv, the plan being
to encapsulate that with a qEnvironmentVariable() method.
[ChangeLog][QtCore][QLockFile] Fixed a bug that caused QLockFile not to
recognize a stale lock file if the machine's hostname contained non-US-
ASCII characters, on Unix. A Windows fix is still pending.
Task-number: QTBUG-49640
Change-Id: Ib9d045544ff370ec901626658a84ec4e6575fe21
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
As of version 10.12 (Sierra), the name of Apple's desktop operating
system will be macOS. Change the occurrences where the Mac platform
is discussed to use a macro \macos, which expands to 'macOS'. This
helps with adapting to future renaming.
Update the instructions on mac-specific Q_OS_* macro usage.
Add a \target for the old 'Qt for OS X' topic to keep links working
for other documentation modules that try to link with the old name.
Change-Id: Id33fb0cd985df702a4ae4efb4c5fd428e77d9b85
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
We should create the files with 0666 and let the umask take care of adjusting
to the final permissions in the file system.
[ChangeLog][QtCore][QLockFile] Fixed permissions on lock files on Unix to
allow for adjustments via umask.
Change-Id: Iee6a6ac3920d0ffd4465f54ac6e955f7fe087173
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: David Faure <david.faure@kdab.com>
Conflicts:
qmake/library/qmakebuiltins.cpp
qmake/library/qmakeevaluator.cpp
qmake/library/qmakeevaluator.h
qmake/project.h
QMakeEvaluator:
* evaluateConditional(): one side changed return type, the other
changed a parameter type.
* split_value_list(): one side changed a parameter adjacent to where ...
* expandVariableReferences(): ... the other killed one overload and
changed the survivor
src/corelib/io/qlockfile_unix.cpp
One side changed a #if condition, the other moved NETBSD's part of
what it controlled.
src/corelib/tools/qdatetime.cpp
One side fixed a reachable Q_UNREACHABLE in toMSecsSinceEpoch(), the
other moved it from the private class to the public one, in the midst
of the "short date-time" optimization, which confused diff entirely.
One side changed a QStringLiteral to QLatin1String, the other rewrote
adjoining code.
src/network/kernel/qauthenticator.cpp
Both rewrote a line, equivalently; kept the dev version.
src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
One side changed #if-ery that the other removed.
tools/configure/configureapp.cpp
One side added a check to -target parsing; the other killed -target.
tests/auto/testlib/selftests/expected_cmptest.lightxml
tests/auto/testlib/selftests/expected_cmptest.teamcity
tests/auto/testlib/selftests/expected_cmptest.txt
tests/auto/testlib/selftests/expected_cmptest.xml
tests/auto/testlib/selftests/expected_cmptest.xunitxml
Regenerated using generate_expected_output.py
I note that quite a few other expected_* come out changed, now.
There was no git-conflict in
src/widgets/kernel/qformlayout.cpp
but it didn't compile; one side removed some unused methods; the other
found uses for one of them. Put FixedColumnMatrix<>::removeRow(int)
back for its new user.
Change-Id: I8cc2a71add48c0a848e13cfc47b5a7754e8ca584
Conflicts:
qmake/library/qmakeevaluator.cpp
One side changed the iterator to use ranged-for, the other changed its
body; they only conflicted because the latter had to add braces around
the body, intruding on the for-line. Trivial resolution.
Change-Id: Ib487bc3bd6e3c5225db15f94b9a8f6caaa33456b
The previous patch works for FreeBSD 10 but however not for 9 and 11
due to the order of includes. Move <sys/user.h> down to fix those compile
issues due to unknown types when user.h is included first.
Change-Id: Ica3d3ddf335a543c4a473e8b80d1667cb81667cf
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Until now, several solutions for the implementations of
processNameByPid() on BSD systems existed:
- one for FreeBSD using libutil through kinfo_getproc()
using sysctl() implicitly
- one for GNU/kFreeBSD using sysctl() explicitly added in commit
a8f4fa217d
OpenBSD and NetBSD also had different approaches in their ports patches
using kvm() and sysctl(). The code unifies this for all BSDs using
sysctl().
Change-Id: Iced9ef01e5966d8688f464f51024a7ed562e26a3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Dmitry Shachnev <mitya57@gmail.com>
Pass -xplatform macx-tvos-clang to configure to build.
Builds device and simulator by default.
Added ‘uikit’ platform with the common setup.
Also added QT_PLATFORM_UIKIT define (undocumented).
qmake config defines tvos (but not ios).
tvOS is 64bits only (QT_ARCH is arm64) and requires bitcode to be
embedded in the binary. A new ‘bitcode’ configuration was added.
For ReleaseDevice builds (which get archived and push to the store),
bitcode is actually embedded (-fembed-bitcode passed to clang). For all
other configurations, only using bitcode markers to keep file size
down (-fembed-bitcode-marker).
Build disables Widgets in qtbase, and qtscript (unsupported,
would require fixes to JavaScriptCore source code).
Qpa same as on iOS but disables device orientation, status bar, clipboard,
menus, dialogs which are not supported on tvOS.
Change-Id: I645804fd933be0befddeeb43095a74d2c178b2ba
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>
Coverity's CID 157687: QCache::insert, indeed, can delete (immediately)
the object we're trying to insert. While this never happens actually in
qlockfile_unix since we have max cost 10 and insert with cost 1, the
code does not look good and Coverity is not happy.
Change-Id: I16a428017bf86e151afe5256906e4cab1ef4044a
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
(for instance any global object which writes out to a config file in the
destructor). If the global cache isn't available anymore, don't use it.
Change-Id: I851a6e394d0b073aebf3ffd88b1966d424bfb92e
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
I wrote a script to help find the files, but I reviewed the
contributions manually to be sure I wasn't claiming copyright for search
& replace, adding Q_DECL_NOTHROW or adding "We mean it" headers.
Change-Id: I7a9e11d7b64a4cc78e24ffff142b506368fc8842
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: I046ec3e47b1876cd7b4b0353a576b352e3a946d9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
It is filesystem dependent if flock and fcntl locks are independent or
the same underlying lock (which causes getting the second lock to fail).
A temporary file in /tmp might be on a local file system and pass
while the lock file is placed on NFS and fail with:
setNativeLocks failed: Resource temporarily unavailable
Instead check for lock conflicts per path and cache the result.
Change-Id: I39c59bb240cd99ef0a0ec271243770ffd5df8a7d
Reviewed-by: David Faure <david.faure@kdab.com>
More specifically, equivalent declarations to this BSD header are
defined implicitly on INTEGRITY, and the header does not exist.
Change-Id: Ib0bd4b22742ef403c83dab0d72c268c1571b8250
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
In case of a lock failure, we potentially pollute the errno value
before printing it. Also, switch to qt_error_string, as strerror
is not reentrant.
Change-Id: I952aac14204637155726bcefc0ed8a21d7fcd501
Reviewed-by: David Faure <david.faure@kdab.com>
The two lines of code are the same as in QFSFileEnginePrivate::nativeSyncToDisk,
but we don't want to create a fileengine instance just for this.
qlockfile_win.cpp already calls FlushFileBuffers, only the Unix implementation
was missing the equivalent call.
Task-number: QTBUG-44771
Change-Id: I2253972857e4de9d27ef442c92983a1088d6f03e
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
GLIBC does not provide kinfo_getproc, so we need to call sysctl manually.
Change-Id: I3bf22959ff74b3b6c34b5360738e52086a3ff1b4
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
QFile::decodeName should be used instead of a simple QString::fromUtf8.
Change-Id: I76955ab01af55dd373f860f6e3dbffa37e60892c
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
readlink does not append a NUL character to buf. If readlink places
PATH_MAX characters into buf, then an unterminated character buffer
would have been passed to QString::fromUtf8.
Change-Id: Ib1865b8df760fa7da91c3be746dc701a165d93ee
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
To cover the situation that the process ID got reused, the current
process name is compared to the name of the process that corresponds
to the process ID from the lock file.
If the process names differ, the lock file is considered stale.
[ChangeLog][QtCore][QLockFile] Detection of stale lock files got more
robust and takes the name of the process that belongs to the stored
PID into account.
Task-number: QTBUG-45497
Change-Id: Ic3c0d7e066435451203e77b9b9ce2d70bfb9c570
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: David Faure <david.faure@kdab.com>
[ChangeLog][QtCore][QLockFile] Fixed a deadlock when the lock file
is corrupted.
Task-number: QTBUG-44771
Change-Id: Ic490b09d70ff1cc1733b64949889a73720b2d0f3
Reviewed-by: David Faure <david.faure@kdab.com>
Use the name "OS X" instead of "Mac OS X", "Mac OS" and "OSX",
and mention iOS. Replace "Carbon Preferences API" by
"CFPreferences API" in the QSettings documentation.
Change-Id: Ia7f9fb874276c7c445a1649df521b96ff43daa0c
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Venugopal Shivashankar <venugopal.shivashankar@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Unlike qAppName, it doesn't require a QCoreApplication instance,
making QLockFile usable in destructors of global statics.
This also uses the value passed to setApplicationName if called
rather than always argv[0].
Change-Id: I40446aba410db42d7cfe6b4408878faf435246f7
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Failure to write into a successfully opened lock file left the
lock file with size 0 in the filesystem.
Task-number: QTBUG-44771
Change-Id: I561bf629b9f160174d658bf105be828f71d78ff9
Reviewed-by: David Faure <david.faure@kdab.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
The common format for lock files is to only contain the PID.
(See http://www.pathname.com/fhs/2.2/fhs-5.9.html)
Qt includes some extra information but we can not expect this
information to be present. Otherwise lock files created by other
(non-Qt) processes are not handled correctly.
Change-Id: Ib9be3c9f07eb8e87193f56d96f5559bbdd5180b8
Reviewed-by: David Faure <david.faure@kdab.com>
Thiago Macieira
Stephan Binner
Olivier Goffart
David Faure
Liang Qi
Topi Reinio
Simon Hausmann
Edward Welbourne
Ralf Nolden
Mike Krus
Timur Pocheptsov
Liang Qi
Jani Heikkinen
David Fries
Tobias Koenig
Rolland Dudemaine
Giuseppe D'Angelo
Dmitry Shachnev
Oswald Buddenhagen
Joerg Bornemann
Allan Sandfeld Jensen
Alexander Volkov
hjk
Rainer Keller