🌴 Sync 2026-03-05 23:51:42

luci-app-syscontrol/root/usr/bin/ram_release.sh

@@ -0,0 +1,155 @@
+#!/bin/sh
+
+# This is open source software, licensed under the MIT License.
+#
+# Copyright (C) 2024 BobbyUnknown
+#
+# Description:
+# This software provides a RAM release scheduling application for OpenWrt.
+# The application allows users to configure and automate the process of
+# releasing RAM on their OpenWrt routers at specified intervals, helping
+# to optimize system performance and resource management through
+# a user-friendly web interface.
+
+
+. /lib/functions.sh
+. /usr/share/libubox/jshn.sh
+
+export TZ='Asia/Shanghai'
+
+LOG_FILE="/var/log/ram_release.log"
+PID_FILE="/var/run/ram_release.pid"
+
+log_message() {
+    local timestamp=$(TZ='Asia/Shanghai' date +"%Y-%m-%d %H:%M:%S %Z")
+    echo "$timestamp: $1" >> "$LOG_FILE"
+    logger -t "RAM Release" -- "$1"
+}
+
+get_config() {
+    config_load "77_syscontrol"
+    config_get enabled schedule enabled "0"
+    config_get time schedule time
+    config_get days schedule days
+}
+
+update_cron() {
+    get_config
+    log_message "Update cron started"
+    log_message "Enabled: $enabled, Time: $time, Days: $days"
+
+    sed -i '/ram_release/d' /etc/crontabs/root
+    if [ "$enabled" = "1" ]; then
+        cron_days=$(echo $days | sed 's/mon/1/g; s/tue/2/g; s/wed/3/g; s/thu/4/g; s/fri/5/g; s/sat/6/g; s/sun/0/g')
+        hour=$(echo $time | cut -d: -f1)
+        minute=$(echo $time | cut -d: -f2)
+        cron_entry="$minute $hour * * $cron_days TZ='Asia/Shanghai' /usr/bin/ram_release.sh release"
+        echo "$cron_entry" >> /etc/crontabs/root
+        log_message "Cron job updated: $cron_entry"
+    else
+        log_message "Schedule disabled"
+    fi
+    /etc/init.d/cron restart
+}
+
+release_ram() {
+    log_message "RAM release started"
+    
+    log_memory_state() {
+        local state=$1
+        log_message "$state cleaning (in MB):"
+        free | awk '
+        /^Mem:/ {
+            total=$2/1024; used=$3/1024; free=$4/1024; shared=$5/1024; 
+            buff_cache=$6/1024; available=$7/1024;
+            printf "  Total RAM: %.1f MB\n", total;
+            printf "  Used RAM: %.1f MB (%.1f%%)\n", used, (used/total*100);
+            printf "  Free RAM: %.1f MB\n", free;
+            printf "  Shared RAM: %.1f MB\n", shared;
+            printf "  Buff/Cache: %.1f MB\n", buff_cache;
+            printf "  Available RAM: %.1f MB\n", available;
+        }' | while read line; do log_message "$line"; done
+    }
+    
+    before_clean=$(free | awk '/^Mem:/ {printf "%.1f %.1f %.1f %.1f %.1f", $2/1024, $3/1024, $4/1024, $6/1024, $7/1024}')
+    log_memory_state "Before"
+    
+    sync
+    echo 3 > /proc/sys/vm/drop_caches
+    swapoff -a && swapon -a
+    echo 1 > /proc/sys/vm/compact_memory
+    
+    sleep 5
+    
+    after_clean=$(free | awk '/^Mem:/ {printf "%.1f %.1f %.1f %.1f %.1f", $2/1024, $3/1024, $4/1024, $6/1024, $7/1024}')
+    log_memory_state "After"
+    
+    set -- $before_clean
+    before_total=$1; before_used=$2; before_free=$3; before_buffers_cache=$4; before_available=$5
+    
+    set -- $after_clean
+    after_total=$1; after_used=$2; after_free=$3; after_buffers_cache=$4; after_available=$5
+    
+    log_message "Changes (in MB):"
+    awk -v bu="$before_used" -v au="$after_used" 'BEGIN {printf "  Used RAM change: %.1f MB\n", au - bu}' | while read line; do log_message "$line"; done
+    awk -v bf="$before_free" -v af="$after_free" 'BEGIN {printf "  Free RAM change: %.1f MB\n", af - bf}' | while read line; do log_message "$line"; done
+    awk -v bbc="$before_buffers_cache" -v abc="$after_buffers_cache" 'BEGIN {printf "  Buff/Cache change: %.1f MB\n", abc - bbc}' | while read line; do log_message "$line"; done
+    awk -v ba="$before_available" -v aa="$after_available" 'BEGIN {printf "  Available RAM change: %.1f MB\n", aa - ba}' | while read line; do log_message "$line"; done
+    
+    log_message "RAM release completed"
+}
+
+start_service() {
+    if [ -f "$PID_FILE" ]; then
+        log_message "Service already running"
+        exit 0
+    fi
+    get_config
+    if [ "$enabled" = "1" ]; then
+        update_cron
+        echo $$ > "$PID_FILE"
+        log_message "Service started"
+    else
+        log_message "Service not enabled"
+    fi
+}
+
+stop_service() {
+    if [ -f "$PID_FILE" ]; then
+        rm "$PID_FILE"
+        sed -i '/ram_release/d' /etc/crontabs/root
+        /etc/init.d/cron restart
+        log_message "Service stopped"
+    else
+        log_message "Service not running"
+    fi
+}
+
+case "$1" in
+    start)
+        start_service
+        ;;
+    stop)
+        stop_service
+        ;;
+    restart)
+        stop_service
+        start_service
+        ;;
+    update)
+        update_cron
+        ;;
+    release)
+        release_ram
+        ;;
+    *)
+        echo "Usage: $0 {start|stop|restart|update|release}"
+        exit 1
+        ;;
+esac
+
+exit 0
+
+reload_service() {
+	restart
+}