Avoid the same hostname in one session

By adding a # in front of used words, genhost will not display the same word in two subsequent runs. It is however possible to display the same word within one run. When generating a large number of hosts, it might be hard to notice the duplication. This commit solves this issue by filtering the wordlist in each iteration. The code for this is not very beautiful, since bash arrays are essentially associative arrays. Signed-off-by: Jonas Eriksson <zqad@acc.umu.se>
PeerRails · Sep 22, 2014 · b9de92b · b9de92b
1 parent 1ff2ba8
commit b9de92b
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/genhost b/genhost
@@ -49,6 +49,18 @@ for i in $(seq $1); do
       sed -i "/^${lines[r]}\$/ s/^/#/" "$wordlist"
       ;;
   esac
+
+  # filter the word list to avoid outputting the same hostname twice in one
+  # session
+  m=0
+  unset lines_new
+  for (( j = 0 ; j < n ; j++)); do
+    if [ $j -ne $r ]; then
+      lines_new[$((m++))]=${lines[j]}
+    fi
+  done
+  lines=("${lines_new[@]}")
+  n=$m
 done
 
 exit 0