summaryrefslogtreecommitdiff
Side-by-side diff
Diffstat (more/less context) (ignore whitespace changes)
-rwxr-xr-xroot/usr/bin/changedns2
1 files changed, 1 insertions, 1 deletions
diff --git a/root/usr/bin/changedns b/root/usr/bin/changedns
index 8270e86..5059d08 100755
--- a/root/usr/bin/changedns
+++ b/root/usr/bin/changedns
@@ -1,42 +1,42 @@
#!/bin/sh
arg0="`basename $0`" # base portion of our filename
arg1="$1"
tmpfile="/tmp/resolv.conf.$$"
usage ( ) {
echo "usage: $arg0 -a|-r {ip} [{ip}...]"
rm -f $tmpfile
exit 1
}
[ "$#" -le 1 ] && usage
shift
-cp /etc/resolv.conf $tmpfile
+[ -f /etc/resolv.conf ] && cp /etc/resolv.conf $tmpfile
case "$arg1" in
"-a")
for ip in "$@"; do
echo $ip
grep -sq "^nameserver $ip\$" $tmpfile || echo "nameserver $ip" >>$tmpfile
done
;;
"-r")
for ip in "$@"; do
grep -v "^nameserver $ip\$" $tmpfile >$tmpfile.2
mv $tmpfile.2 $tmpfile
done
;;
*)
usage
;;
esac
[ -f $tmpfile ] && cp $tmpfile /etc/resolv.conf
rm -f $tmpfile
exit 0