QProcessEnvironment env = QProcessEnvironment::systemEnvironment(); QString homeDir = env.value("HOME"); qDebug() << "Home directory is:" << homeDir;
QProcessEnvironment env = QProcessEnvironment::systemEnvironment(); env.insert("PATH", "/usr/local/bin:" + env.value("PATH")); QProcess::startDetached("/usr/local/bin/myapp", QStringList(), ".", &env);
QProcessEnvironment env = QProcessEnvironment::systemEnvironment(); env.insert("LD_LIBRARY_PATH", "/usr/local/lib"); QProcess process; process.setProcessEnvironment(env); process.start("/usr/bin/myapp", QStringList() << "-hello" << "world"); process.waitForFinished();This code creates a QProcessEnvironment object and initializes it with the system environment variables. It then inserts a new directory "/usr/local/lib" at the end of the "LD_LIBRARY_PATH" variable. Finally, it launches a new QProcess with the modified environment, using the "/usr/bin/myapp" binary and passing two arguments ("-hello" and "world"). Conclusion: QProcessEnvironment is a useful class for managing environment variables in C++ programs. It allows you to read and modify variables, as well as set them for child processes. The package library for QProcessEnvironment is "Qt Core".