home/bin/resolv

   1 #! /bin/sh
   2
   3 FILE='/etc/resolv.conf'
   4 CONTENT=\
   5 'nameserver 167.206.13.180
   6 nameserver 167.206.13.181
   7 nameserver 192.168.1.1'
   8
   9 uncommented() {
  10         echo "$CONTENT"
  11 }
  12
  13 commented() {
  14         for line in "$CONTENT"
  15         do
  16                 echo "$line" | sed 's/^/#/'
  17         done
  18 }
  19
  20 switch_on() {
  21         chattr -i "$FILE"  # Make mutable
  22         rm -f "$FILE"
  23         uncommented > "$FILE"
  24         chmod a+r "$FILE"
  25 }
  26
  27 switch_off() {
  28         rm -f "$FILE"
  29         commented > "$FILE"
  30         chmod a-rw "$FILE"
  31         chattr +i "$FILE"  # Make immutable
  32 }
  33
  34 case "$1" in
  35         'on' ) switch_on;;
  36         'off') switch_off;;
  37         '')
  38                 echo "usage: $0 SWITCH\n\nSWITCH = on | off"
  39                 exit 1;;
  40 esac