oeqa: wic: Add tests for permissions and change-directory

Make sure that the permissions and username are respected when using all
the rootfs modifiers.

Add tests for change-directory command

Cc: Paul Barker <pbarker@konsulko.com>
(From OE-Core rev: 4aad9531df44d1b0637bd559161702ad86861b46)

Signed-off-by: Ricardo Ribalda Delgado <ricardo@ribalda.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/wic.py

@@ -62,6 +62,12 @@ def extract_files(debugfs_output):
     return [line.split('/')[5].strip() for line in \
             debugfs_output.strip().split('/\n')]
 
+def files_own_by_root(debugfs_output):
+    for line in debugfs_output.strip().split('/\n'):
+        if line.split('/')[3:5] != ['0', '0']:
+            print(debugfs_output)
+            return False
+    return True
 
 class WicTestCase(OESelftestTestCase):
     """Wic test class."""
@@ -84,6 +90,7 @@ class WicTestCase(OESelftestTestCase):
                 self.skipTest('wic-tools cannot be built due its (intltool|gettext)-native dependency and NLS disable')
 
             bitbake('core-image-minimal')
+            bitbake('core-image-minimal-mtdutils')
             WicTestCase.image_is_ready = True
 
         rmtree(self.resultdir, ignore_errors=True)
@@ -506,6 +513,89 @@ part /part2 --source rootfs --ondisk mmcblk0 --fstype=ext4 --include-path %s"""
                                       % (wks_file, self.resultdir), ignore_status=True).status)
         os.remove(wks_file)
 
+    def test_permissions(self):
+        """Test permissions are respected"""
+
+        oldpath = os.environ['PATH']
+        os.environ['PATH'] = get_bb_var("PATH", "wic-tools")
+
+        t_normal = """
+part / --source rootfs --fstype=ext4
+"""
+        t_exclude = """
+part / --source rootfs --fstype=ext4 --exclude-path=home
+"""
+        t_multi = """
+part / --source rootfs --ondisk sda --fstype=ext4
+part /export --source rootfs --rootfs=core-image-minimal-mtdutils --fstype=ext4
+"""
+        t_change = """
+part / --source rootfs --ondisk sda --fstype=ext4 --exclude-path=etc/   
+part /etc --source rootfs --fstype=ext4 --change-directory=etc
+"""
+        tests = [t_normal, t_exclude, t_multi, t_change]
+
+        try:
+            for test in tests:
+                include_path = os.path.join(self.resultdir, 'test-include')
+                os.makedirs(include_path)
+                wks_file = os.path.join(include_path, 'temp.wks')
+                with open(wks_file, 'w') as wks:
+                    wks.write(test)
+                runCmd("wic create %s -e core-image-minimal -o %s" \
+                                       % (wks_file, self.resultdir))
+
+                for part in glob(os.path.join(self.resultdir, 'temp-*.direct.p*')):
+                    res = runCmd("debugfs -R 'ls -p' %s 2>/dev/null" % (part))
+                    self.assertEqual(True, files_own_by_root(res.output))
+
+                rmtree(self.resultdir, ignore_errors=True)
+
+        finally:
+            os.environ['PATH'] = oldpath
+
+    def test_change_directory(self):
+        """Test --change-directory wks option."""
+
+        oldpath = os.environ['PATH']
+        os.environ['PATH'] = get_bb_var("PATH", "wic-tools")
+
+        try:
+            include_path = os.path.join(self.resultdir, 'test-include')
+            os.makedirs(include_path)
+            wks_file = os.path.join(include_path, 'temp.wks')
+            with open(wks_file, 'w') as wks:
+                wks.write("part /etc --source rootfs --fstype=ext4 --change-directory=etc")
+            runCmd("wic create %s -e core-image-minimal -o %s" \
+                                       % (wks_file, self.resultdir))
+
+            part1 = glob(os.path.join(self.resultdir, 'temp-*.direct.p1'))[0]
+
+            res = runCmd("debugfs -R 'ls -p' %s 2>/dev/null" % (part1))
+            files = extract_files(res.output)
+            self.assertIn('passwd', files)
+
+        finally:
+            os.environ['PATH'] = oldpath
+
+    def test_change_directory_errors(self):
+        """Test --change-directory wks option error handling."""
+        wks_file = 'temp.wks'
+
+        # Absolute argument.
+        with open(wks_file, 'w') as wks:
+            wks.write("part / --source rootfs --fstype=ext4 --change-directory /usr")
+        self.assertNotEqual(0, runCmd("wic create %s -e core-image-minimal -o %s" \
+                                      % (wks_file, self.resultdir), ignore_status=True).status)
+        os.remove(wks_file)
+
+        # Argument pointing to parent directory.
+        with open(wks_file, 'w') as wks:
+            wks.write("part / --source rootfs --fstype=ext4 --change-directory ././..")
+        self.assertNotEqual(0, runCmd("wic create %s -e core-image-minimal -o %s" \
+                                      % (wks_file, self.resultdir), ignore_status=True).status)
+        os.remove(wks_file)
+
 class Wic2(WicTestCase):
 
     def test_bmap_short(self):