mirror of
https://github.com/azlux/log2ram.git
synced 2023-10-10 13:37:24 +02:00
104 lines
2.6 KiB
Bash
Executable File
104 lines
2.6 KiB
Bash
Executable File
#!/usr/bin/env sh
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. /etc/log2ram.conf
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HDD_LOG='/var/hdd.log'
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RAM_LOG='/var/log'
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LOG_NAME='log2ram.log'
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LOG2RAM_LOG="${RAM_LOG}/${LOG_NAME}"
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LOG_OUTPUT="tee -a $LOG2RAM_LOG"
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printf -v NOW '%(%F %H:%M:%S)T' -1 || NOW="$(date '+%F %H:%M:%S')" # Actual date and time (date as fallback)
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isSafe () {
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[ ! -d "$HDD_LOG/" ] && { echo "ERROR: $HDD_LOG/ doesn't exist! Can't sync." ; exit 1 ;}
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}
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syncToDisk () {
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isSafe
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echo "==> $NOW - Syncing to disk" >> $LOG2RAM_LOG
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if [ "$USE_RSYNC" = true ]; then
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rsync -aXv --inplace --no-whole-file --delete-after $RAM_LOG/ $HDD_LOG/ 2>&1 | $LOG_OUTPUT
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else
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cp -rfupv $RAM_LOG/ -T $HDD_LOG/ 2>&1 | $LOG_OUTPUT
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fi
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}
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syncFromDisk () {
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isSafe
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if [ -n "$(du -sh -t "$SIZE" $HDD_LOG/ | cut -f1)" ]; then
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echo "ERROR: RAM disk 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 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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echo "==> $NOW - Syncing from disk" >> $LOG2RAM_LOG
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if [ "$USE_RSYNC" = true ]; then
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rsync -aXv --inplace --no-whole-file --delete-after $HDD_LOG/ $RAM_LOG/ 2>&1 | $LOG_OUTPUT
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else
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cp -rfupv $HDD_LOG/ -T $RAM_LOG/ 2>&1 | $LOG_OUTPUT
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fi
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}
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wait_for () {
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while ! grep -qs "$1" /proc/mounts; do
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sleep 0.1
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done
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}
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createZramLogDrive () {
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# Check Zram Class created
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if [ ! -d '/sys/class/zram-control' ]; then
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modprobe zram
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RAM_DEV=0
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else
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RAM_DEV="$(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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case "$1" in
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start)
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[ ! -d "$HDD_LOG/" ] && mkdir $HDD_LOG/
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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,nodev,user=log2ram "/dev/zram${RAM_DEV}" ${RAM_LOG}/
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else
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mount -t tmpfs -o "nosuid,noexec,nodev,mode=0755,size=${SIZE}" log2ram $RAM_LOG/
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fi
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wait_for $RAM_LOG
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syncFromDisk
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;;
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stop)
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syncToDisk
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#ZRAM_LOG=$(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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;;
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write)
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syncToDisk
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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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