X-Git-Url: https://git.adam-barratt.org.uk/?a=blobdiff_plain;f=dsa-nagios-checks%2Fchecks%2Fdsa-check-log-age-loghost;h=afec81144c419cda624414dece911a8a795e2ca6;hb=3551260dad9b25594a1460dfdecfd2171f78b349;hp=256caeff6d06a9c19d5f4ce4abe0b3ecd6d2f2fe;hpb=3b0d60b49e92da5f5c7e81d14a28fdd3544a0161;p=mirror%2Fdsa-nagios.git

diff --git a/dsa-nagios-checks/checks/dsa-check-log-age-loghost b/dsa-nagios-checks/checks/dsa-check-log-age-loghost
index 256caef..afec811 100755
--- a/dsa-nagios-checks/checks/dsa-check-log-age-loghost
+++ b/dsa-nagios-checks/checks/dsa-check-log-age-loghost
@@ -29,10 +29,15 @@ usage(){
 
 host="$1"
 if [ -z "$host" ] || [ "$host" = "-h" ] ||  [ "$host" = "--help" ]; then
-	echo >&2 "$0: Usage: $0 <host>"
+	echo >&2 "Usage: $0 <host>"
 	usage 3
 fi
 
+if [ "${host/[^a-z0-9-]/}" != "$host" ]; then
+	echo >&2 "$0: Invalid hostname $1"
+	exit 3
+fi
+
 ts=$(date -d 'now' +'%Y/%m/%d')
 file="/var/log/hosts/$host/$ts/syslog"
 if [ ! -e "$file" ]; then