SystemMonitor: Add an "Unveiled paths" section to the per-process tabs

This shows the data from /proc/PID/unveil in a nice table view. :^)

Applications/SystemMonitor/Makefile

@@ -8,6 +8,7 @@ OBJS = \
     ProcessMemoryMapWidget.o \
     ProcessFileDescriptorMapWidget.o \
     NetworkStatisticsWidget.o \
+    ProcessUnveiledPathsWidget.o \
     main.o
 
 PROGRAM = SystemMonitor

Applications/SystemMonitor/ProcessUnveiledPathsWidget.cpp

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "ProcessUnveiledPathsWidget.h"
+#include <LibGUI/GBoxLayout.h>
+#include <LibGUI/GJsonArrayModel.h>
+#include <LibGUI/GTableView.h>
+
+ProcessUnveiledPathsWidget::ProcessUnveiledPathsWidget(GWidget* parent)
+    : GWidget(parent)
+{
+    set_layout(make<GBoxLayout>(Orientation::Vertical));
+    layout()->set_margins({ 4, 4, 4, 4 });
+    m_table_view = GTableView::construct(this);
+    m_table_view->set_size_columns_to_fit_content(true);
+
+    Vector<GJsonArrayModel::FieldSpec> pid_unveil_fields;
+    pid_unveil_fields.empend("path", "Path", TextAlignment::CenterLeft);
+    pid_unveil_fields.empend("permissions", "Permissions", TextAlignment::CenterLeft);
+    m_table_view->set_model(GJsonArrayModel::create({}, move(pid_unveil_fields)));
+}
+
+ProcessUnveiledPathsWidget::~ProcessUnveiledPathsWidget()
+{
+}
+
+void ProcessUnveiledPathsWidget::set_pid(pid_t pid)
+{
+    if (m_pid == pid)
+        return;
+    m_pid = pid;
+    static_cast<GJsonArrayModel*>(m_table_view->model())->set_json_path(String::format("/proc/%d/unveil", m_pid));
+}

Applications/SystemMonitor/ProcessUnveiledPathsWidget.h

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibGUI/GWidget.h>
+
+class GTableView;
+
+class ProcessUnveiledPathsWidget final : public GWidget {
+    C_OBJECT(ProcessUnveiledPathsWidget);
+public:
+    virtual ~ProcessUnveiledPathsWidget() override;
+
+    void set_pid(pid_t);
+
+private:
+    explicit ProcessUnveiledPathsWidget(GWidget* parent);
+
+    RefPtr<GTableView> m_table_view;
+    pid_t m_pid { -1 };
+};

Applications/SystemMonitor/main.cpp

@@ -33,6 +33,7 @@
 #include "ProcessModel.h"
 #include "ProcessStacksWidget.h"
 #include "ProcessTableView.h"
+#include "ProcessUnveiledPathsWidget.h"
 #include <LibCore/CTimer.h>
 #include <LibDraw/PNGLoader.h>
 #include <LibGUI/GAboutDialog.h>
@@ -213,6 +214,9 @@ int main(int argc, char** argv)
     auto open_files_widget = ProcessFileDescriptorMapWidget::construct(nullptr);
     process_tab_widget->add_widget("Open files", open_files_widget);
 
+    auto unveiled_paths_widget = ProcessUnveiledPathsWidget::construct(nullptr);
+    process_tab_widget->add_widget("Unveiled paths", unveiled_paths_widget);
+
     auto stacks_widget = ProcessStacksWidget::construct(nullptr);
     process_tab_widget->add_widget("Stacks", stacks_widget);
 
@@ -220,6 +224,7 @@ int main(int argc, char** argv)
         open_files_widget->set_pid(pid);
         stacks_widget->set_pid(pid);
         memory_map_widget->set_pid(pid);
+        unveiled_paths_widget->set_pid(pid);
     };
 
     window->show();