mirror of https://github.com/azlux/log2ram.git
146 lines
3.7 KiB
Bash
Executable File
146 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env sh
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. /etc/log2ram.conf
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if [ -z "$PATH_DISK" ]; then
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PATH_DISK='/var/log'
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fi
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LOG_NAME='log2ram.log'
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isSafe () {
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[ -d "$HDD_LOG" ] || echo "ERROR: $HDD_LOG/ doesn't exist! Can't sync."
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[ -d "$HDD_LOG" ] || exit 1
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}
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remountOriginal() {
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OPTION="$1"
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mount -o remount,"$OPTION" "$HDD_LOG"
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}
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syncToDisk () {
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isSafe
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if [ -x "$(command -v rsync)" ]; then
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rsync -aXv --inplace --no-whole-file --delete-after "$RAM_LOG"/ "$HDD_LOG"/ 2>&1 | tee -a "$LOG2RAM_LOG"
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else
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cp -rfup "$RAM_LOG"/ -T "$HDD_LOG"/ 2>&1 | tee -a "$LOG2RAM_LOG"
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fi
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}
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syncFromDisk () {
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isSafe
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TP_SIZE=$SIZE
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if [ "$ZL2R" = true ]; then
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TP_SIZE=$LOG_DISK_SIZE
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fi
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if [ -n "$(du -sh -t "$TP_SIZE" "$HDD_LOG"/ | cut -f1)" ]; then
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echo "ERROR: RAM disk for \"$HDD_LOG/\" too small. Can't sync."
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umount -l "$RAM_LOG"/
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umount -l "$HDD_LOG"/
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if [ "$MAIL" = true ]; then
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echo "LOG2RAM : No place on RAM for \"$HDD_LOG/\" anymore, fallback on the disk" | mail -s 'Log2Ram Error' root;
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fi
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exit 1
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fi
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if [ -x "$(command -v rsync)" ]; then
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rsync -aXv --inplace --no-whole-file --delete-after "$HDD_LOG"/ "$RAM_LOG"/ 2>&1 | tee -a "$LOG2RAM_LOG"
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else
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cp -rfup "$HDD_LOG"/ -T "$RAM_LOG"/ 2>&1 | tee -a "$LOG2RAM_LOG"
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fi
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}
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wait_for () {
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while ! findmnt "$1" > /dev/null; do
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sleep 0.1
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done
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}
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createZramLogDrive () {
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# Check Zram Class created
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if [ ! -d "/sys/class/zram-control" ]; then
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modprobe zram
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RAM_DEV='0'
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else
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RAM_DEV=$(cat /sys/class/zram-control/hot_add)
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fi
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echo "$COMP_ALG" > "/sys/block/zram${RAM_DEV}/comp_algorithm"
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echo "$LOG_DISK_SIZE" > "/sys/block/zram${RAM_DEV}/disksize"
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echo "$SIZE" > "/sys/block/zram${RAM_DEV}/mem_limit"
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mke2fs -t ext4 "/dev/zram${RAM_DEV}"
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}
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make_log_dir () {
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[ -d "$HDD_LOG" ] || mkdir "$HDD_LOG"
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}
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case "$1" in
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start)
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IFS=';'
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for i in $PATH_DISK; do
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PATH_FIRST_PART="${i%/*}"
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PATH_LAST_PART="${i##/*/}"
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RAM_LOG="$i"
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HDD_LOG="${PATH_FIRST_PART}/hdd.${PATH_LAST_PART}"
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LOG2RAM_LOG="${RAM_LOG}/${LOG_NAME}"
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make_log_dir
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mount --bind "$RAM_LOG"/ "$HDD_LOG"/
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mount --make-private "$HDD_LOG"/
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wait_for "$HDD_LOG"
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if [ "$ZL2R" = true ]; then
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createZramLogDrive
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mount -t ext4 -o nosuid,noexec,noatime,nodev,user=log2ram "/dev/zram${RAM_DEV}" "$RAM_LOG"/
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else
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mount -t tmpfs -o "nosuid,noexec,noatime,nodev,mode=0755,size=${SIZE}" log2ram "$RAM_LOG"/
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fi
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wait_for "$RAM_LOG"
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syncFromDisk
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done
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;;
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stop)
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IFS=';'
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for i in $PATH_DISK; do
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PATH_FIRST_PART="${i%/*}"
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PATH_LAST_PART="${i##/*/}"
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RAM_LOG="$i"
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HDD_LOG="${PATH_FIRST_PART}/hdd.${PATH_LAST_PART}"
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LOG2RAM_LOG="${RAM_LOG}/${LOG_NAME}"
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syncToDisk
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#ZRAM_LOG=$(awk '$2 == "/var/log" {print $1}' /proc/mounts)
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#ZRAM_LOG=$(echo ${ZRAM_LOG} | grep -o -E '[0-9]+')
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umount -l "$RAM_LOG"/
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umount -l "$HDD_LOG"/
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# Unsure as even with Root permision denied
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#echo ${ZRAM_LOG} > /sys/class/zram-control/hot_remove
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done
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;;
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write)
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IFS=';'
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for i in $PATH_DISK; do
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PATH_FIRST_PART="${i%/*}"
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PATH_LAST_PART="${i##/*/}"
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RAM_LOG="$i"
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HDD_LOG="${PATH_FIRST_PART}/hdd.${PATH_LAST_PART}"
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LOG2RAM_LOG="${RAM_LOG}/${LOG_NAME}"
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syncToDisk
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done
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;;
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*)
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echo 'Usage: log2ram {start|stop|write}' >&2
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exit 1
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;;
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esac
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