Merge pull request #11 from jfut/fix-unbound-variable

fix: LIST_FILE: unbound variable encountered with no arguments (#10)

Author: jfut

README.md

@@ -8,7 +8,7 @@ Fast update of IP set for ipset.
 ## Usage
 
 ```bash
-ipset-fast-update 1.5.1
+ipset-fast-update 1.5.2
 
 Usage:
     ipset-fast-update -n SET_NAME [-i PATH]... [-u URL]... [-e EXCLUDE_PATH]... [OPTIONS...]

ipset-fast-update

@@ -13,7 +13,7 @@
 
 set -euo pipefail
 
-VERSION="1.5.1"
+VERSION="1.5.2"
 
 ALERT_THRESHOLD_RATIO="80"
 IS_TEMPORARY="0"
@@ -26,9 +26,9 @@ IPSET_MAXELEM="4294967295"
 IPSET_CONFIG="/etc/sysconfig/ipset-config"
 STATE_DIR="/var/lib/ipset-fast-update"
 
-unset LIST_FILE
-unset TMP_LIST_FILE
-unset TMP_LIST_CURRENT_FILE
+LIST_FILE=""
+TMP_LIST_FILE=""
+TMP_LIST_CURRENT_FILE=""
 
 trap atexit EXIT
 trap 'rc=$?; trap - EXIT; atexit; exit $?' INT PIPE TERM