Index: src/OFProcess.h
==================================================================
--- src/OFProcess.h
+++ src/OFProcess.h
@@ -195,8 +195,15 @@
  * This method needs to be called for some programs before data can be read,
  * since some programs don't start processing before the write direction is
  * closed.
  */
 - (void)closeForWriting;
+
+/*!
+ * @brief Waits for the process to terminate and returns the exit status.
+ *
+ * If the process has already exited, this returns the exit status immediately.
+ */
+- (int)waitForTermination;
 @end
 
 OF_ASSUME_NONNULL_END

Index: src/platform/posix/OFProcess.m
==================================================================
--- src/platform/posix/OFProcess.m
+++ src/platform/posix/OFProcess.m
@@ -375,6 +375,19 @@
 	_pid = -1;
 	_readPipe[0] = -1;
 
 	[super close];
 }
+
+- (int)waitForTermination
+{
+	if (_readPipe[0] == -1)
+		@throw [OFNotOpenException exceptionWithObject: self];
+
+	if (_pid != -1) {
+		waitpid(_pid, &_status, 0);
+		_pid = -1;
+	}
+
+	return WEXITSTATUS(_status);
+}
 @end

Index: src/platform/windows/OFProcess.m
==================================================================
--- src/platform/windows/OFProcess.m
+++ src/platform/windows/OFProcess.m
@@ -346,6 +346,28 @@
 	_process = INVALID_HANDLE_VALUE;
 	_readPipe[0] = NULL;
 
 	[super close];
 }
+
+- (int)waitForTermination
+{
+	if (_readPipe[0] == NULL)
+		@throw [OFNotOpenException exceptionWithObject: self];
+
+	if (_process != INVALID_HANDLE_VALUE) {
+		DWORD exitCode;
+
+		WaitForSingleObject(_process, INFINITE);
+
+		if (GetExitCodeProcess(_process, &exitCode))
+			_status = exitCode;
+		else
+			_status = GetLastError();
+
+		CloseHandle(_process);
+		_process = INVALID_HANDLE_VALUE;
+	}
+
+	return _status;
+}
 @end