Add method to retrieve exit status of process

python/core/auto_generated/qgsrunprocess.sip.in

@@ -119,6 +119,11 @@ Runs the process, and blocks until execution finishes.
 The optional ``feedback`` argument can be used to specify a feedback object for cancellation/process termination.
 
 After execution completes, the process' result code will be returned.
+%End
+
+    QProcess::ExitStatus exitStatus() const;
+%Docstring
+After a call to :py:func:`~QgsBlockingProcess.run`, returns the process' exit status.
 %End
 
 };

src/core/qgsrunprocess.cpp

@@ -270,9 +270,9 @@ int QgsBlockingProcess::run( QgsFeedback *feedback )
   const bool requestMadeFromMainThread = QThread::currentThread() == QCoreApplication::instance()->thread();
 
   int result = 0;
-  QProcess::ExitStatus status = QProcess::NormalExit;
+  QProcess::ExitStatus exitStatus = QProcess::NormalExit;
 
-  std::function<void()> runFunction = [ this, &result, &status, feedback]()
+  std::function<void()> runFunction = [ this, &result, &exitStatus, feedback]()
   {
     // this function will always be run in worker threads -- either the blocking call is being made in a worker thread,
     // or the blocking call has been made from the main thread and we've fired up a new thread for this function
@@ -293,10 +293,10 @@ int QgsBlockingProcess::run( QgsFeedback *feedback )
     {
       p.terminate();
     } );
-    connect( &p, qgis::overload< int, QProcess::ExitStatus >::of( &QProcess::finished ), this, [&loop, &result, &status]( int res, QProcess::ExitStatus st )
+    connect( &p, qgis::overload< int, QProcess::ExitStatus >::of( &QProcess::finished ), this, [&loop, &result, &exitStatus]( int res, QProcess::ExitStatus st )
     {
       result = res;
-      status = st;
+      exitStatus = st;
       loop.quit();
     }, Qt::DirectConnection );
 
@@ -330,6 +330,12 @@ int QgsBlockingProcess::run( QgsFeedback *feedback )
     runFunction();
   }
 
+  mExitStatus = exitStatus;
   return result;
+}
+
+QProcess::ExitStatus QgsBlockingProcess::exitStatus() const
+{
+  return mExitStatus;
 };
 

src/core/qgsrunprocess.h

@@ -172,13 +172,20 @@ class CORE_EXPORT QgsBlockingProcess : public QObject
      */
     int run( QgsFeedback *feedback = nullptr );
 
+    /**
+     * After a call to run(), returns the process' exit status.
+     */
+    QProcess::ExitStatus exitStatus() const;
+
   private:
 
     QString mProcess;
     QStringList mArguments;
     std::function< void( const QByteArray & ) > mStdoutHandler;
     std::function< void( const QByteArray & ) > mStderrHandler;
 
+    QProcess::ExitStatus mExitStatus = QProcess::NormalExit;
+
 };
 
 

tests/src/python/test_qgsblockingprocess.py

@@ -21,13 +21,15 @@
 __date__ = 'January 2021'
 __copyright__ = '(C) 2021, Nyall Dawson'
 
-import qgis  # NOQA
+import os
+import tempfile
 
+import qgis  # NOQA
+from qgis.PyQt.QtCore import QProcess
 from qgis.core import (
     QgsBlockingProcess,
     QgsFeedback
 )
-
 from qgis.testing import unittest, start_app
 
 from utilities import unitTestDataPath
@@ -40,7 +42,6 @@
 class TestQgsBlockingProcess(unittest.TestCase):
 
     def test_process_ok(self):
-
         def std_out(ba):
             std_out.val += ba.data().decode('UTF-8')
 
@@ -57,11 +58,11 @@ def std_err(ba):
 
         f = QgsFeedback()
         self.assertEqual(p.run(f), 0)
+        self.assertEqual(p.exitStatus(), QProcess.NormalExit)
         self.assertIn('GDAL', std_out.val)
         self.assertEqual(std_err.val, '')
 
     def test_process_err(self):
-
         def std_out(ba):
             std_out.val += ba.data().decode('UTF-8')
 
@@ -78,9 +79,40 @@ def std_err(ba):
 
         f = QgsFeedback()
         self.assertEqual(p.run(f), 1)
+        self.assertEqual(p.exitStatus(), QProcess.NormalExit)
         self.assertIn('Usage', std_out.val)
         self.assertIn('FAILURE', std_err.val)
 
+    def test_process_crash(self):
+        """
+        Test a script which simulates a crash
+        """
+        temp_folder = tempfile.mkdtemp()
+
+        script_file = os.path.join(temp_folder, 'crash_process.sh')
+        with open(script_file, 'wt') as f:
+            f.write('kill $$')
+
+        os.chmod(script_file, 0o775)
+
+        def std_out(ba):
+            std_out.val += ba.data().decode('UTF-8')
+
+        std_out.val = ''
+
+        def std_err(ba):
+            std_err.val += ba.data().decode('UTF-8')
+
+        std_err.val = ''
+
+        p = QgsBlockingProcess('sh', [script_file])
+        p.setStdOutHandler(std_out)
+        p.setStdErrHandler(std_err)
+
+        f = QgsFeedback()
+        self.assertNotEqual(p.run(f), 0)
+        self.assertEqual(p.exitStatus(), QProcess.CrashExit)
+
 
 if __name__ == '__main__':
     unittest.main()