Qt 5.11 | Qt Core | C++ Classes | QProcess

Qt 5.11.3 Reference Documentation

# Obsolete Members for QProcess

The following members of class QProcess are obsolete. They are provided to keep old source code working. We strongly advise against using them in new code.

## Public Functions

`(obsolete)` QStringList | environment() const
`(obsolete)` Q_PID | pid() const
`(obsolete)` QProcess::ProcessChannelMode | readChannelMode() const
`(obsolete)` void | setEnvironment(const QStringList &environment)
`(obsolete)` void | setReadChannelMode(QProcess::ProcessChannelMode mode)

- 2 public functions inherited from QObject

## Signals

`(obsolete)` void | error(QProcess::ProcessError error)
`(obsolete)` void | finished(int exitCode)

## Member Function Documentation

### QStringList QProcess::environment() const

Returns the environment that QProcess will pass to its child process, or an empty QStringList if no environment has been set using setEnvironment(). If no environment has been set, the environment of the calling process will be used.

See also processEnvironment(), setEnvironment(), and systemEnvironment().

### `[signal]` void QProcess::error(QProcess::ProcessError error)

Use errorOccurred() instead.

Note: Signal error is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:

      connect(process, QOverload<QProcess::ProcessError>::of(&QProcess::error),
          [=](QProcess::ProcessError error){ /* ... */ });

### `[signal]` void QProcess::finished(int exitCode)

This is an overloaded function.

Use finished(int exitCode, QProcess::ExitStatus status) instead.

Note: Signal finished is overloaded in this class. To connect to this signal by using the function pointer syntax, Qt provides a convenient helper for obtaining the function pointer as shown in this example:

      connect(process, QOverload<int>::of(&QProcess::finished),
          [=](int exitCode){ /* ... */ });

### Q_PID QProcess::pid() const

Use processId() instead.

Returns the native process identifier for the running process, if available. If no process is currently running, `0` is returned.

Note: Unlike processId(), pid() returns an integer on Unix and a pointer on Windows.

See also Q_PID and processId().

### QProcess::ProcessChannelMode QProcess::readChannelMode() const

Returns the read channel mode of the QProcess. This function is equivalent to processChannelMode()

See also setReadChannelMode() and processChannelMode().

### void QProcess::setEnvironment(const QStringList &environment)

Sets the environment that QProcess will pass to the child process. The parameter environment is a list of key=value pairs.

For example, the following code adds the environment variable `TMPDIR`:

      QProcess process;
      QStringList env = QProcess::systemEnvironment();
      env << "TMPDIR=C:\\MyApp\\temp"; // Add an environment variable
      process.setEnvironment(env);
      process.start("myapp");

Note: This function is less efficient than the setProcessEnvironment() function.

See also environment(), setProcessEnvironment(), and systemEnvironment().

### void QProcess::setReadChannelMode(QProcess::ProcessChannelMode mode)

Use setProcessChannelMode(mode) instead.

See also readChannelMode() and setProcessChannelMode().