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https://github.com/kuhyx/testsAndMisc.git
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64 lines
2.3 KiB
Bash
Executable File
64 lines
2.3 KiB
Bash
Executable File
#!/system/bin/sh
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# Runs early in boot - set up hosts file and start watchdog
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# MODDIR is set by Magisk and points to this module's directory
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GUARDIAN_DIR="/data/adb/android_guardian"
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# shellcheck disable=SC2034 # Used for documentation; heredoc defines its own
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MODULE_DIR="/data/adb/modules/android_guardian"
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WATCHDOG_SCRIPT="$GUARDIAN_DIR/watchdog.sh"
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mkdir -p "$GUARDIAN_DIR"
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# Log that we're starting
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] post-fs-data: Guardian module loading" >>"$GUARDIAN_DIR/guardian.log"
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# Create persistent watchdog script that runs independently of module state
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cat >"$WATCHDOG_SCRIPT" <<'WATCHDOG'
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#!/system/bin/sh
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# Secondary watchdog - runs independently of module state
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# Even if module is "disabled" in Magisk UI, this keeps running and undoes it
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GUARDIAN_DIR="/data/adb/android_guardian"
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MODULE_DIR="/data/adb/modules/android_guardian"
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LOG_FILE="$GUARDIAN_DIR/watchdog.log"
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log() {
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] $*" >>"$LOG_FILE"
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}
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log "=== Watchdog starting ==="
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while true; do
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# Protect module from Magisk UI disable/remove
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if [ -f "$MODULE_DIR/disable" ]; then
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log "ALERT: Module disable detected via Magisk UI - removing disable flag"
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rm -f "$MODULE_DIR/disable"
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fi
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if [ -f "$MODULE_DIR/remove" ]; then
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log "ALERT: Module removal detected via Magisk UI - removing remove flag"
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rm -f "$MODULE_DIR/remove"
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fi
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# Also protect the hosts file directly
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CONTROL_FILE="$GUARDIAN_DIR/control"
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if [ "$(cat "$CONTROL_FILE" 2>/dev/null)" = "ENABLED" ]; then
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if [ -f "$GUARDIAN_DIR/hosts.backup" ] && [ -f "$MODULE_DIR/system/etc/hosts" ]; then
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current_hash=$(md5sum "$MODULE_DIR/system/etc/hosts" 2>/dev/null | cut -d' ' -f1)
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backup_hash=$(md5sum "$GUARDIAN_DIR/hosts.backup" 2>/dev/null | cut -d' ' -f1)
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if [ "$current_hash" != "$backup_hash" ]; then
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log "ALERT: Hosts tampering detected - restoring"
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cp "$GUARDIAN_DIR/hosts.backup" "$MODULE_DIR/system/etc/hosts"
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fi
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fi
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fi
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sleep 3
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done
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WATCHDOG
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chmod 755 "$WATCHDOG_SCRIPT"
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# Start watchdog as a separate background process
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nohup sh "$WATCHDOG_SCRIPT" >/dev/null 2>&1 &
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echo "[$(date '+%Y-%m-%d %H:%M:%S')] post-fs-data: Watchdog started" >>"$GUARDIAN_DIR/guardian.log"
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