all: Move the multi-configuration file reading routine to a common helper

Based on Emil's (xexaxo) feedback, we now have a common.sh file
that contains the implementation of the routine to read all config
files for kdump/pstore, and we use Makefile to join the files,
having the same implemention in all users.

Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>

save-dumps.sh.in

@@ -0,0 +1,121 @@
+load_kdump_config
+
+MAIN_FOLDER="$(cat "${MNT_TMP}")"
+rm -f "${MNT_TMP}"
+
+if [ ! -d "${MAIN_FOLDER}" ]; then
+	logger "kdump: invalid folder (${MAIN_FOLDER}) - aborting..."
+	exit 1
+fi
+
+LOGS_FOUND=0
+KDUMP_TMP_FOLDER="${MAIN_FOLDER}/.tmp"
+
+# Use UTC timezone to match kdump collection
+CURRENT_TSTAMP=$(date -u +"%Y%m%d%H%M")
+
+#  By default, pstore is mounted in this location; if it isn't, we bail-out.
+#  Notice we currently only support the logs generated by the ramoops backend.
+PSTORE_CNT=$(find /sys/fs/pstore/* 2>/dev/null | grep -c ramoops)
+if [ "${PSTORE_CNT}" -ne 0 ]; then
+
+	PSTORE_FOLDER="${KDUMP_TMP_FOLDER}/pstore"
+	mkdir -p "${PSTORE_FOLDER}"
+
+	LOOP_CNT=0
+	while [ "${PSTORE_CNT}" -gt 0 ]; do
+		PSTORE_FILE="$(find /sys/fs/pstore/* | grep ramoops | sort | head -n1)"
+		SAVED_FILE="${PSTORE_FOLDER}/dmesg-pstore.${CURRENT_TSTAMP}-${LOOP_CNT}"
+
+		cat "${PSTORE_FILE}" > "${SAVED_FILE}"
+		sync "${SAVED_FILE}"
+		rm -f "${PSTORE_FILE}"
+
+		PSTORE_CNT=$((PSTORE_CNT - 1))
+		LOOP_CNT=$((LOOP_CNT + 1))
+	done
+	LOGS_FOUND=${LOOP_CNT}
+
+	#  Logs should live on <...>/.tmp folder, due to the zip compression.
+	mv "${PSTORE_FOLDER}"/* "${KDUMP_TMP_FOLDER}/" 2>/dev/null
+	rm -rf "${PSTORE_FOLDER}"
+fi
+
+#  Now, we proceed the same way if there are kdump data.
+KDUMP_CRASH_FOLDER="${MAIN_FOLDER}/crash"
+
+KDUMP_CNT=$(find "${KDUMP_CRASH_FOLDER}"/* -type d 2>/dev/null | wc -l)
+if [ "${KDUMP_CNT}" -ne 0 ]; then
+	KD_FOLDER="${KDUMP_TMP_FOLDER}/kdump"
+	mkdir -p "${KD_FOLDER}"
+
+	LOOP_CNT=0
+	while [ "${KDUMP_CNT}" -gt 0 ]; do
+		CRASH_CURRENT=$(find "${KDUMP_CRASH_FOLDER}"/* -type d 2>/dev/null | head -n1)
+
+		#  When collecting the vmcore/dmesg during kdump, folder is
+		#  saved with its name == the timestamp of the collection.
+		CRASH_TSTAMP=$(basename "${CRASH_CURRENT}")
+
+		if [ -s "${CRASH_CURRENT}/dmesg.txt" ]; then
+			SAVED_FILE="${KD_FOLDER}/dmesg-kdump.${CRASH_TSTAMP}"
+			mv "${CRASH_CURRENT}/dmesg.txt" "${SAVED_FILE}"
+			sync "${SAVED_FILE}"
+
+		fi
+
+		#  We won't pack vmcores in the zip blob, but let's save
+		#  it in case it was collected as well.
+		if [ -s "${CRASH_CURRENT}/vmcore.compressed" ]; then
+			SAVED_FILE="${KDUMP_CRASH_FOLDER}/vmcore.${CRASH_TSTAMP}"
+			mv "${CRASH_CURRENT}/vmcore.compressed" "${SAVED_FILE}"
+			sync "${SAVED_FILE}"
+
+		fi
+
+		rm -rf "${CRASH_CURRENT}"
+		KDUMP_CNT=$((KDUMP_CNT - 1))
+		LOOP_CNT=$((LOOP_CNT + 1))
+	done
+
+	LOGS_FOUND=$((LOGS_FOUND + LOOP_CNT))
+
+	#  Logs should live on .tmp folder, due to the zip compression.
+	mv "${KD_FOLDER}"/* "${KDUMP_TMP_FOLDER}/" 2>/dev/null
+	rm -rf "${KD_FOLDER}"
+fi
+
+
+# If we have pstore and/or kdump logs, let's process them...
+LOGS_FOLDER="${MAIN_FOLDER}/logs"
+
+if [ ${LOGS_FOUND} -ne 0 ]; then
+	mkdir -p "${LOGS_FOLDER}"
+
+	#  First  we collect some more info, like DMI data, os-release, etc;
+	DMI_FNAME="${KDUMP_TMP_FOLDER}/dmidecode.${CURRENT_TSTAMP}"
+	dmidecode > "${DMI_FNAME}"
+
+	BUILD_FNAME="${KDUMP_TMP_FOLDER}/build.${CURRENT_TSTAMP}"
+	cp "/etc/os-release" "${BUILD_FNAME}"
+
+	VERSION_FNAME="${KDUMP_TMP_FOLDER}/version.${CURRENT_TSTAMP}"
+	uname -r > "${VERSION_FNAME}"
+
+	sync "${DMI_FNAME}" "${BUILD_FNAME}" "${VERSION_FNAME}"
+
+	#  Create the dump compressed pack.
+	LOG_FNAME="kdump-${CURRENT_TSTAMP}.zip"
+	LOG_FNAME="${LOGS_FOLDER}/${LOG_FNAME}"
+	zip -9 -jq "${LOG_FNAME}" "${KDUMP_TMP_FOLDER}"/* 1>/dev/null
+
+	sync "${LOG_FNAME}" 2>/dev/null
+	if [ ! -s "${LOG_FNAME}" ]; then
+		logger "kdump: couldn't create the compressed log archive"
+		logger "kdump: check folder \"${KDUMP_TMP_FOLDER}\" for logs"
+	else
+		logger "kdump: logs saved in \"${LOGS_FOLDER}\""
+	fi
+fi
+
+rm -rf "${KDUMP_TMP_FOLDER}"