quote the arg to number match

weewx · Jul 4, 2024 · 99c414f · 99c414f
1 parent a988560
commit 99c414f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pkg/debian/postinst b/pkg/debian/postinst
@@ -28,7 +28,7 @@ WEEWX_HTMLDIR="${WEEWX_HTMLDIR:-/var/www/html/weewx}"
 WEEWX_USERDIR=/etc/weewx/bin/user
 WEEWX_INSTANCES="${WEEWX_INSTANCES:-weewx}"
 
-is_num() { x=`echo $1 | grep "^[+-]\?[0-9]\+$"`; echo $x; }
+is_num() { x=`echo "$1" | grep "^[+-]\?[0-9]\+$"`; echo $x; }
 
 # insert the driver and stanza into the configuration file
 insert_driver() {