support/testing/tests/fs/test_cpio.py: new runtime test

It includes a simple test for the full cpio image, and a test of the
dracut image. To validate that the dracut image is a subset of the full
image, 'pv' is added to the image, and the test verifies that pv is not
part of the image. Note that the real rootfs is not mounted at the
moment, so pv is never available in the running image.

Systemd and other init systems are currently untested.

Signed-off-by: Thierry Bultel <thierry.bultel@linatsea.fr>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

support/testing/tests/fs/test_cpio.py

@@ -0,0 +1,125 @@
+import os
+import infra.basetest
+import subprocess
+
+CHECK_FS_CMD = "mount | grep 'rootfs on / type rootfs'"
+
+
+def boot_img(emulator, builddir):
+    img = os.path.join(builddir, "images", "rootfs.cpio")
+    emulator.boot(arch="armv7",
+                  kernel="builtin",
+                  options=["-initrd", "{}".format(img)])
+    emulator.login()
+    _, exit_code = emulator.run(CHECK_FS_CMD)
+    return exit_code
+
+
+class TestCpioFull(infra.basetest.BRTest):
+    config = infra.basetest.BASIC_TOOLCHAIN_CONFIG + \
+        """
+        BR2_INIT_BUSYBOX=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def test_run(self):
+
+        exit_code = boot_img(self.emulator,
+                             self.builddir)
+        self.assertEqual(exit_code, 0)
+
+
+class TestCpioDracutBase(infra.basetest.BRTest):
+    config = \
+        """
+        BR2_arm=y
+        BR2_TOOLCHAIN_EXTERNAL=y
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+        BR2_INIT_BUSYBOX=y
+        BR2_PACKAGE_PV=y
+        BR2_TARGET_ROOTFS_CPIO=y
+        BR2_TARGET_ROOTFS_CPIO_DRACUT=y
+        # BR2_TARGET_ROOTFS_TAR is not set
+        """
+
+    def check_dracut(self):
+        out = subprocess.check_output(["cpio", "--list"],
+                                      stdin=open(os.path.join(self.builddir, "images/rootfs.cpio")),
+                                      stderr=open(os.devnull, "w"),
+                                      cwd=self.builddir,
+                                      env={"LANG": "C"},
+                                      universal_newlines=True)
+        # pv should *not* be included in cpio image
+        self.assertEqual(out.find("bin/pv"), -1)
+
+        exit_code = boot_img(self.emulator,
+                             self.builddir)
+        self.assertEqual(exit_code, 0)
+
+        # No pivot_root is done, so pv shouldn't be there
+        _, exit_code = self.emulator.run("ls -l /usr/bin/pv")
+        self.assertNotEqual(exit_code, 0)
+
+
+class TestCpioDracutUclibc(TestCpioDracutBase):
+    config = TestCpioDracutBase.config + \
+        """
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_UCLIBC_STABLE=y
+        """
+
+    def test_run(self):
+        self.check_dracut()
+
+
+class TestCpioDracutGlibc(TestCpioDracutBase):
+    config = TestCpioDracutBase.config + \
+        """
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_GLIBC_STABLE=y
+        """
+
+    def test_run(self):
+        self.check_dracut()
+
+
+class TestCpioDracutMusl(TestCpioDracutBase):
+    config = TestCpioDracutBase.config + \
+        """
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_MUSL_STABLE=y
+        """
+
+    def test_run(self):
+        self.check_dracut()
+
+
+class TestCpioDracutUclibcMergedUsr(TestCpioDracutBase):
+    config = TestCpioDracutBase.config + \
+        """
+        BR2_ROOTFS_MERGED_USR=y
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_UCLIBC_STABLE=y
+        """
+
+    def test_run(self):
+        self.check_dracut()
+
+
+class TestCpioDracutGlibcMergedUsr(TestCpioDracutBase):
+    config = TestCpioDracutBase.config + \
+        """
+        BR2_ROOTFS_MERGED_USR=y
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_GLIBC_STABLE=y
+        """
+
+    def test_run(self):
+        self.check_dracut()
+
+
+class TestCpioDracutMuslMergedUsr(TestCpioDracutBase):
+    config = TestCpioDracutBase.config + \
+        """
+        BR2_ROOTFS_MERGED_USR=y
+        BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_ARMV5_EABI_MUSL_STABLE=y
+        """
+
+    def test_run(self):
+        self.check_dracut()