2011-11-15 14:15:57 -08:00 · 2011-11-15 14:15:57 -08:00 · fd58acc7f7
parent b1aff730b9
commit fd58acc7f7
1 changed files with 5 additions and 1 deletions
--- a/6
+++ b/6
@ -7,7 +7,11 @@ remusage="Usage: `basename $0` -remove host"
 case "$1" in
 -add)
  if [ $# -eq 3 ]; then
-    printf "$3\t$2\n" >> ${path}
+    if [[ -n $(grep "^$3.*[^A-Za-z0-9\.]$2$" hosts) ]]; then
+      echo "Duplicate address/host combination, ${path} unchanged."
+    else
+      printf "$3\t$2\n" >> ${path}
+    fi
  else
    echo $addusage;
  fi