initscripts: add dmesg file to /var/log

We should create the /var/log/dmesg.log file as a default.
If we don't then a later kernel error can flush the dmesg
ring buffer, losing valuable debug information.

(From OE-Core rev: faa8cc6c2a582a32c695f3f2b0d45b6892c769fd)

Signed-off-by: Xin Ouyang <Xin.Ouyang@windriver.com>
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 33 insertions, 2 deletions

diff --git a/meta/recipes-core/initscripts/initscripts-1.0/dmesg.sh b/meta/recipes-core/initscripts/initscripts-1.0/dmesg.sh
new file mode 100644
index 0000000000..a97b0681e1
--- /dev/null
+++ b/meta/recipes-core/initscripts/initscripts-1.0/dmesg.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:             dmesg
+# Required-Start:
+# Required-Stop:
+# Default-Start:        S
+# Default-Stop:
+### END INIT INFO
+
+if [ -f /var/log/dmesg ]; then
+        if [ -f /usr/sbin/logrotate ]; then
+                logrotate -f /etc/logrotate-dmesg.conf
+        else
+                mv -f /var/log/dmesg /var/log/dmesg.old
+        fi
+fi
+dmesg -s 131072 > /var/log/dmesg
diff --git a/meta/recipes-core/initscripts/initscripts-1.0/logrotate-dmesg.conf b/meta/recipes-core/initscripts/initscripts-1.0/logrotate-dmesg.conf
new file mode 100644
index 0000000000..6f46e4216f
--- /dev/null
+++ b/meta/recipes-core/initscripts/initscripts-1.0/logrotate-dmesg.conf
@@ -0,0 +1,9 @@
+# see "man logrotate" for details
+# rotate dmesg, and keep 5 versions.
+
+/var/log/dmesg {
+        create
+        rotate 5
+        nodateext
+}
+
diff --git a/meta/recipes-core/initscripts/initscripts_1.0.bb b/meta/recipes-core/initscripts/initscripts_1.0.bb
index 531b2b62df..52e1c9cc94 100644
--- a/meta/recipes-core/initscripts/initscripts_1.0.bb
+++ b/meta/recipes-core/initscripts/initscripts_1.0.bb
@@ -3,7 +3,7 @@ DESCRIPTION = "Initscripts provide the basic system startup initialization scrip
 SECTION = "base"
 LICENSE = "GPLv2"
 LIC_FILES_CHKSUM = "file://COPYING;md5=751419260aa954499f7abaabaa882bbe"
-PR = "r140"
+PR = "r141"
 
 INHIBIT_DEFAULT_DEPS = "1"
 
@@ -31,7 +31,10 @@ SRC_URI = "file://functions \
            file://read-only-rootfs-hook.sh \
            file://volatiles \
            file://save-rtc.sh \
-           file://GPLv2.patch"
+           file://GPLv2.patch \
+           file://dmesg.sh \
+           file://logrotate-dmesg.conf \
+"
 
 SRC_URI_append_arm = " file://alignment.sh"
 
@@ -89,6 +92,8 @@ do_install () {
         install -m 0755    ${WORKDIR}/read-only-rootfs-hook.sh ${D}${sysconfdir}/init.d
         install -m 0755    ${WORKDIR}/save-rtc.sh       ${D}${sysconfdir}/init.d
         install -m 0644    ${WORKDIR}/volatiles         ${D}${sysconfdir}/default/volatiles/00_core
+        install -m 0755    ${WORKDIR}/dmesg.sh          ${D}${sysconfdir}/init.d
+        install -m 0644    ${WORKDIR}/logrotate-dmesg.conf ${D}${sysconfdir}/
 
         if [ "${TARGET_ARCH}" = "arm" ]; then
                 install -m 0755 ${WORKDIR}/alignment.sh ${D}${sysconfdir}/init.d