Audited scripts/stats.sh

Shellcheck pass and code cleanup.

Set stricter error handling with sh options.

Removes the for loop and cat(1) in favor of directly calling the
file with cut(1) and piping the output to a while read loop. Read
https://github.com/koalaman/shellcheck/wiki/SC2002 for more info.

Adds proper variable globbing.

Removes the large block of commented code, if this turns out to be
necessary, we can add a condition check to the script instead of
uncommenting on a per case basis.

scripts/stats.sh

@@ -1,23 +1,13 @@
 #!/bin/sh
 
-for dir in `cat /etc/proftpd/vpasswd | cut -d : -f 6`; do
-#for dir in /home/dalleFTP/reynaud_mila; do
-    if [ -d $dir ]; then
-        du -s $dir | cut -f 1 >$dir/.size
-        chmod 644 $dir/.size
+set -o errexit
+set -o nounset
+#set -x
 
-        #mtime=0
-        #export IFS=$'\n'
-        #for file in `find $dir -type f -not -name .size -not -name .last-modified`; do
-        #   timestamp=`stat -c %Y $file`
-        #   if [ $timestamp -gt $mtime ]; then
-        #       mtime=$timestamp
-        #   fi
-        #done
-        #unset IFS
-            
-        #echo $mtime >$dir/.lastmodified
-        #chmod 644 $dir/.lastmodified
+cut -d : -f 6 /etc/proftpd/vpasswd | while read -r dir; do
+    if [ -d "$dir" ]; then
+        du -s "$dir" | cut -f 1 > "$dir"/.size
+        chmod 644 "$dir"/.size
     fi
 done