Make wc a little bit safer

1 files changed, 10 insertions, 6 deletions

diff --git a/entries/braxtonhall/wc/fib.sh b/entries/braxtonhall/wc/fib.sh
index c909617..fc419b3 100644
--- a/entries/braxtonhall/wc/fib.sh
+++ b/entries/braxtonhall/wc/fib.sh
@@ -1,18 +1,22 @@
 #!/bin/bash
 
-rec () {
-    shopt -s nullglob dotglob
+function rec () {
 
     if [ $2 == "0" ]; then
         :
     elif [ $2 == "1" ]; then
-        echo "🥵" > "$1/$2.fib"
+        [ -f "$1/$2.fib" ] || echo "🥵" > "$1/$2.fib"
     else
-        mkdir "$1/$2"
+        [ -d "$1/$2" ] || mkdir "$1/$2"
         rec "$1/$2" $(($2 - 1))
         rec "$1/$2" $(($2 - 2))
     fi
 }
 
-rec $(pwd) $1
-find $(pwd)/$1 -type f | wc -l
+if [[ $1 =~ ^[0-9]+$ ]]; then
+    rec $(pwd) $1
+    find $(pwd)/$1 -type f | wc -l
+else
+    echo "Please provide a natural number!"
+    exit 1
+fi