| -rwxr-xr-x | root/usr/bin/changedns | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/root/usr/bin/changedns b/root/usr/bin/changedns index 5059d08..edc48bc 100755 --- a/root/usr/bin/changedns +++ b/root/usr/bin/changedns @@ -1,42 +1,43 @@ #!/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 -[ -f /etc/resolv.conf ] && cp /etc/resolv.conf $tmpfile +[ ! -e "/etc/resolv.conf" ] && touch /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 +[ -e $tmpfile ] && cp $tmpfile /etc/resolv.conf rm -f $tmpfile exit 0 |