From db322a6bcdc6e2f7c528ea2cf022ee2dd86e08bc Mon Sep 17 00:00:00 2001
From: j8takagi <j8takagi@nifty.com>
Date: Tue, 7 Nov 2017 20:36:57 +0900
Subject: [PATCH] =?utf8?q?=E5=A4=89=E6=95=B0=E3=81=AE=E6=9B=B8=E3=81=8D?=
 =?utf8?q?=E6=96=B9=E3=82=92=E5=A4=89=E6=9B=B4?=
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---
 global_ip_chk.sh | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/global_ip_chk.sh b/global_ip_chk.sh
index 6f550cc..7c3fe25 100755
--- a/global_ip_chk.sh
+++ b/global_ip_chk.sh
@@ -2,22 +2,26 @@
 BINDIR=~/bin
 IPDIR=~
 
-IPFILE=$IPDIR/globalip.txt
+IPFILE=${IPDIR}/globalip.txt
 
 ECHO=/bin/echo
 LOGGER=/usr/bin/logger
 CAT=/bin/cat
+TEST=/usr/bin/test
+WGET=/usr/bin/wget
 
-NOWIP=$(wget -q -O - ipcheck.ieserver.net)
-if test -s $IPFILE; then
-    CACHEIP=$($CAT $IPFILE)
+IPCHECKSERVER=ipcheck.ieserver.net
+
+NOWIP=$(${WGET} -q -O - ${IPCHECKSERVER})
+if ${TEST} -s ${IPFILE}; then
+    CACHEIP=$(${CAT} ${IPFILE})
 else
     CACHEIP=0.0.0.0
 fi
-if test $NOWIP != $CACHEIP; then
-    $ECHO "Global IP address changed to $NOWIP." | $LOGGER -p local2.info
-    $ECHO $NOWIP >$IPFILE
-    $BINDIR/mydns_ip_update
+if ${TEST} "${NOWIP}" != "${CACHEIP}"; then
+    ${ECHO} "Global IP address changed from ${CACHEIP} to ${NOWIP}." | ${LOGGER} -p local2.info
+    ${ECHO} ${NOWIP} >${IPFILE}
+    ${BINDIR}/mydns_ip_update
 else
-    $ECHO "Global IP address NOT changed. ($NOWIP)" | $LOGGER -p local2.debug
+    ${ECHO} "Global IP address does NOT change from ${NOWIP}." | ${LOGGER} -p local2.debug
 fi
-- 
2.47.3