[PATCH 16/16] meta: Add enable-fsck helper recipe

[Jan Kiszka <jan.kiszka@siemens.com>]

From: Jan Kiszka <jan.kiszka@siemens.com>

This is a run-once systemd service that enables checks for all regular
filesystems on the target. We do this on the live system rather during
build because we only have the full information required for
populating the initramfs with the right tools available then - at least
as long as we do not want to patch much more.

Enable this feature in the demo local.conf by default because we have
read/write filesystems here.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 meta-isar/conf/local.conf.sample                   |  2 +-
 meta/recipes-support/enable-fsck/enable-fsck.bb    | 25 ++++++++++++++++++++++
 .../enable-fsck/files/enable-fsck.service          | 23 ++++++++++++++++++++
 .../enable-fsck/files/enable-fsck.sh               | 16 ++++++++++++++
 meta/recipes-support/enable-fsck/files/postinst    |  3 +++
 5 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-support/enable-fsck/enable-fsck.bb
 create mode 100644 meta/recipes-support/enable-fsck/files/enable-fsck.service
 create mode 100644 meta/recipes-support/enable-fsck/files/enable-fsck.sh
 create mode 100644 meta/recipes-support/enable-fsck/files/postinst

diff --git a/meta-isar/conf/local.conf.sample b/meta-isar/conf/local.conf.sample
index 769d853..92588fe 100644
--- a/meta-isar/conf/local.conf.sample
+++ b/meta-isar/conf/local.conf.sample
@@ -159,7 +159,7 @@ CONF_VERSION = "1"
 
 #
 # The default list of extra packages to be installed.
-IMAGE_INSTALL = "example-hello example-raw example-module"
+IMAGE_INSTALL = "example-hello example-raw example-module enable-fsck"
 
 #
 # Enable cross-compilation support
diff --git a/meta/recipes-support/enable-fsck/enable-fsck.bb b/meta/recipes-support/enable-fsck/enable-fsck.bb
new file mode 100644
index 0000000..0413f79
--- /dev/null
+++ b/meta/recipes-support/enable-fsck/enable-fsck.bb
@@ -0,0 +1,25 @@
+# Resize last partition to full medium size on fist boot
+#
+# This software is a part of ISAR.
+# Copyright (c) Siemens AG, 2018
+#
+# SPDX-License-Identifier: MIT
+
+inherit dpkg-raw
+
+DESCRIPTION = "This service enables fsck on first boot"
+
+DEBIAN_DEPENDS = "systemd, sed, mount, initramfs-tools"
+
+SRC_URI = " \
+    file://enable-fsck.service \
+    file://enable-fsck.sh \
+    file://postinst"
+
+do_install() {
+    install -d -m 755 ${D}/lib/systemd/system
+    install -m 644 ${WORKDIR}/enable-fsck.service ${D}/lib/systemd/system/
+
+    install -d -m 755 ${D}/usr/share/enable-fsck
+    install -m 755 ${WORKDIR}/enable-fsck.sh ${D}/usr/share/enable-fsck/
+}
diff --git a/meta/recipes-support/enable-fsck/files/enable-fsck.service b/meta/recipes-support/enable-fsck/files/enable-fsck.service
new file mode 100644
index 0000000..846497d
--- /dev/null
+++ b/meta/recipes-support/enable-fsck/files/enable-fsck.service
@@ -0,0 +1,23 @@
+# This software is a part of ISAR.
+# Copyright (c) Siemens AG, 2018
+#
+# SPDX-License-Identifier: MIT
+
+[Unit]
+Description=Enable fsck for mounted devices
+DefaultDependencies=no
+Conflicts=shutdown.target
+After=systemd-remount-fs.service
+Before=sysinit.target shutdown.target
+ConditionPathIsReadWrite=/etc
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/share/enable-fsck/enable-fsck.sh
+ExecStartPost=-/bin/systemctl disable enable-fsck.service
+StandardOutput=syslog
+StandardError=syslog
+
+[Install]
+WantedBy=sysinit.target
diff --git a/meta/recipes-support/enable-fsck/files/enable-fsck.sh b/meta/recipes-support/enable-fsck/files/enable-fsck.sh
new file mode 100644
index 0000000..b3dce44
--- /dev/null
+++ b/meta/recipes-support/enable-fsck/files/enable-fsck.sh
@@ -0,0 +1,16 @@
+#!/bin/sh
+#
+# Update rootfs device in fstab, enable checks for all regular filesystems
+#
+# This software is a part of ISAR.
+# Copyright (c) Siemens AG, 2018
+#
+# SPDX-License-Identifier: MIT
+
+set -e
+
+ROOT_DEV=$(/bin/findmnt -n -o SOURCE /)
+sed -i -e 's|^/dev/root\([ 	]\+.*[ 	]\+\)0[ 	]\+0|'$ROOT_DEV'\10	1|' \
+       -e 's|^\(/dev/.*[ 	]\+\)0[ 	]\+0|\10	2|' /etc/fstab
+
+update-initramfs -u
diff --git a/meta/recipes-support/enable-fsck/files/postinst b/meta/recipes-support/enable-fsck/files/postinst
new file mode 100644
index 0000000..1c4c3bd
--- /dev/null
+++ b/meta/recipes-support/enable-fsck/files/postinst
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+systemctl enable enable-fsck.service
-- 
2.16.4