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QNX: Fix QLockFile support

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Implement getting pid by process name and enable using flock().

Pick-to: 6.2
Change-Id: I500e645b451baddea788d834374a7ae29a4d223f
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Pasi Petäjäjärvi 2021-11-23 12:50:02 +02:00
parent f370a4c49c
commit 64cff16e0d
1 changed files with 21 additions and 1 deletions
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22
src/corelib/io/qlockfile_unix.cpp
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@ -59,7 +59,7 @@
#include <sys/file.h> // flock
#endif
#if defined(Q_OS_RTEMS) || defined(Q_OS_QNX)
#if defined(Q_OS_RTEMS)
// flock() does not work in these OSes and produce warnings when we try to use
# undef LOCK_EX
# undef LOCK_NB
@ -278,7 +278,27 @@ QString QLockFilePrivate::processNameByPid(qint64 pid)
QString name = QFile::decodeName(kp.ki_comm);
# endif
return name;
#elif defined(Q_OS_QNX)
char exePath[PATH_MAX];
sprintf(exePath, "/proc/%lld/exefile", pid);
int fd = qt_safe_open(exePath, O_RDONLY);
if (fd == -1)
return QString();
QT_STATBUF sbuf;
if (QT_FSTAT(fd, &sbuf) == -1) {
qt_safe_close(fd);
return QString();
}
QByteArray buffer(sbuf.st_size, Qt::Uninitialized);
buffer.resize(qt_safe_read(fd, buffer.data(), sbuf.st_size - 1));
if (buffer.isEmpty()) {
// The pid is gone. Return some invalid process name to fail the test.
return QStringLiteral("/ERROR/");
}
return QFileSystemEntry(buffer, QFileSystemEntry::FromNativePath()).fileName();
#else
Q_UNUSED(pid);
return QString();