feat: UI support for emptying shares from an unRAID array disk

emhttp/plugins/dynamix/DeviceInfo.page

@@ -876,7 +876,7 @@ _(Spin down delay)_:
 <?endif;?>
 <?if (diskType('Data') || (isPool($tag) && !isSubpool($tag))):?>
 _(File system status)_:
-: <?=_(_var($disk, 'fsStatus'))?>&nbsp;
+: <?=_(_var($disk, 'fsStatus'))?><?=(_var($disk,'fsStatus')==="Mounted")? (_var($disk,'fsEmpty')==="yes"? ", empty" : ", not empty"):""?>&nbsp;
 
 <?if ($fsTypeImmutable):?>
 _(File system type)_:

emhttp/plugins/dynamix/ShareSettings.page

@@ -28,6 +28,7 @@ $fileMax = (int) file_get_contents('/proc/sys/fs/file-max');
 $(function() {
   $('#s1').dropdownchecklist({emptyText:"_(All)_", width:<?=$width[0]?>, explicitClose:"..._(close)_"});
   $('#s2').dropdownchecklist({emptyText:"_(None)_", width:<?=$width[0]?>, explicitClose:"..._(close)_"});
+  $('#s3').dropdownchecklist({emptyText:"_(None)_", width:<?=$width[0]?>, explicitClose:"..._(close)_"});
   presetShare(document.share_settings);
 });
 
@@ -47,6 +48,7 @@ async function prepareShare(form) {
   item = form.shareUserInclude.options[0];
   item.value = include;
   item.selected = true;
+
   var exclude = '';
   for (var i=0,item; item=form.shareUserExclude.options[i]; i++) {
     if (item.selected) {
@@ -59,6 +61,18 @@ async function prepareShare(form) {
   item.value = exclude;
   item.selected = true;
 
+  var emptying = '';
+  for (var i=0,item; item=form.shareUserEmptying.options[i]; i++) {
+    if (item.selected) {
+      if (emptying.length) emptying += ',';
+      emptying += item.value;
+      item.selected = false;
+    }
+  }
+  item = form.shareUserEmptying.options[0];
+  item.value = emptying;
+  item.selected = true;
+
   /* Validate file count input against fileMax */
   try {
     const fileCountInput = form.querySelector('#file_count');
@@ -87,8 +101,10 @@ function presetShare(form,shares) {
   var onOff = disabled ? 'disable':'enable';
   form.shareUserInclude.disabled = disabled;
   form.shareUserExclude.disabled = disabled;
+  form.shareUserEmptying.disabled = disabled;
   $('#s1').dropdownchecklist(onOff);
   $('#s2').dropdownchecklist(onOff);
+  $('#s3').dropdownchecklist(onOff);
 }
 </script>
 <form markdown="1" name="share_settings" method="POST" action="/update.htm" target="progressFrame" onsubmit="return prepareShare(this)">
@@ -128,6 +144,15 @@ _(Excluded disk(s))_:
 
 :shares_excluded_disks_help:
 
+_(Emptying disk(s))_:
+: <select id="s3" name="shareUserEmptying" multiple="multiple" style="display:none">
+  <?foreach ($disks as $disk):?>
+  <?=mk_option_luks(_var($disk,'name'),_var($var,'shareUserEmptying'),strstr(_var($disk,'fsType'),':',true))?>
+  <?endforeach;?>
+  </select>
+
+:shares_emptying_disks_help:
+
 _(Permit exclusive shares)_:
 : <select name="shareUserExclusive" <?=$disabled?>>
   <?=mk_option($var['shareUserExclusive'], "no", _('No'))?>

sbin/mover

@@ -83,6 +83,29 @@ start() {
     fi
   done
 
+  # maybe empty an array disk
+  EMPTYING=$(grep '^shareUserEmptying=' /boot/config/share.cfg | cut -d'"' -f2)
+  IFS=',' read -ra arr <<< "$EMPTYING"
+  for DISK in "${arr[@]}"; do
+    # we can only empty share directories
+    for SHAREPATH in /mnt/$DISK/* ; do
+      SHARE=$(basename "$SHAREPATH")
+      if [[ -d "$SHAREPATH" && -f "$CFGPATH/$SHARE.cfg" ]]; then
+        move "$SHAREPATH" "-e"
+      fi
+    done
+
+    # output list of files which could not be moved
+    # use 'find' in case huge number of files left in /mnt/$DISK
+    count=$(find /mnt/$DISK -mindepth 1 | wc -l)
+    if [ "$count" -gt 0 ]; then
+      find /mnt/$DISK -mindepth 1 -depth -printf 'move: %p Not moved\n' | head -n 100
+      if [ "$count" -gt 100 ]; then
+        echo "[output truncated to first 100 entries]"
+      fi
+    fi
+  done
+
   rm -f $PIDFILE
   echo "mover: finished"
 }