whenfilechanges with glob support

qcd_function

@@ -140,28 +140,40 @@ Keeps a history of folders visited in ~/.bash_cdhistory
 
 
 function whenfilechanges() {
-    [ -z "$1" ] && { echo 'Usage: whenfilechanges "file" "some" "command" 
+    [ -z "$2" ] && { echo 'Usage: whenfilechanges "file" "some" "command" 
       Follows the modification time of the "file" and runs the command 
-      at every change.  '
-        return
-    }
-    [ -e "$1" ] || { echo $1 not found
+      at every change. 
+      The "file" may also be a glob e.g. "*tex" '
         return
     }
+
     local fname
     local otime
     local ntime
+    local i
     
-    fname=$1
+    fname=($1)
+    echo Waiting for ${#fname[@]} files to change: ${fname[@]}
     shift 1
-    otime=$( stat -c %Z "$fname" )
-    while : 
-    do ntime=$( stat -c %Z "$fname" )
-        [ "$ntime" -ne "$otime" ] && {
-            eval "$@"
-            otime=$( stat -c %Z "$fname" )
+    echo "Command: \"$@\""
+    otime=()
+    for ((i=0;i<${#fname[@]};i++))
+    do [ -e "${fname[$i]}" ] || {
+            echo "File: ${fname[$i]} not found!"
+            return
         }
-        
+        otime[$i]=$( stat -c %Z "${fname[$i]}" )
+    done 
+    while : 
+    do ntime=()
+        for ((i=0;i<${#fname[@]};i++))
+        do ntime[$i]=$( stat -c %Z "${fname[$i]}" )
+            [ "${ntime[$i]}" -ne "${otime[$i]}" ] && {
+                echo "${fname[$i]} changed:"
+                eval "$@"
+                otime[$i]=$( stat -c %Z "${fname[$i]}" )
+            }
+       done 
        sleep 2
     done