Add a toggle for "global" to the image descriptor; its something

we change often.

www/imageid_defs.php

@@ -233,6 +233,25 @@ class Image
 	return $newimage; 
     }
 
+    #
+    # Flip global bit. If making it global, turn off shared.
+    # Also, if an EZ image, flip the bit on the os_info entry too.
+    #
+    function SetGlobal($mode) {
+	$id       = $this->imageid();
+	$mode     = ($mode ? 1 : 0);
+	$extra    = ($mode ? ",shared=0" : "");
+
+	DBQueryFatal("update images set global='$mode' $extra ".
+		     "where imageid='$id'");
+
+	if ($this->ezid()) {
+	    DBQueryFatal("update os_info set shared='$mode' ".
+			 "where osid='$id'");
+	}
+	return 0;
+    }
+
     #
     # Class function to edit an image descriptor.
     #
@@ -385,13 +404,12 @@ class Image
 	$gid_idx= $user->uid_idx();
 
         #
-        # Global ImageIDs can be read by anyone but written by Admins only.
+        # Global ImageIDs can be read by anyone but written with permission.
         # 
 	if ($global) {
 	    if ($access_type == $TB_IMAGEID_READINFO) {
 		return 1;
 	    }
-	    return 0;
 	}
 
         #
@@ -661,11 +679,10 @@ class Image
                 <td>Global?: </td>
                 <td class=left>\n";
 
-	if ($globalid)
-	    echo "Yes";
-	else
-	    echo "No";
-    
+	$globalflip = ($globalid ? 0 : 1);
+	$globalval  = ($globalid ? "Yes" : "No");
+	echo "$globalval (<a href=toggle.php?imageid=$imageid".
+	    "&type=imageglobal&value=$globalflip>Toggle</a>)";
 	echo "  </td>
               </tr>\n";
 

www/toggle.php

 <?php
 #
-# Copyright (c) 2000-2011 University of Utah and the Flux Group.
+# Copyright (c) 2000-2012 University of Utah and the Flux Group.
 # 
 # {{{EMULAB-LICENSE
 # 
@@ -42,7 +42,7 @@ $isadmin   = ISADMIN();
 # List of valid toggles
 $toggles = array("adminon", "webfreeze", "cvsweb", "lockdown", "stud",
 		 "cvsrepo_public", "workbench", "hiderun", "widearearoot",
-		 "skipvlans");
+		 "imageglobal", "skipvlans");
 
 # list of valid values for each toggle
 $values  = array("adminon"        => array(0,1),
@@ -54,6 +54,7 @@ $values  = array("adminon"        => array(0,1),
 		 "cvsrepo_public" => array(0,1),
 		 "workbench"      => array(0,1),
 		 "widearearoot"   => array(0,1),
+		 "imageglobal"    => array(0,1),
 		 "hiderun"        => array(0,1));
 
 # list of valid extra variables for the each toggle, and mandatory flag.
@@ -66,6 +67,7 @@ $optargs = array("adminon"        => array(),
 		 "cvsrepo_public" => array("pid" => 1),
 		 "workbench"      => array("pid" => 1),
 		 "widearearoot"   => array("user" => 1),
+		 "imageglobal"    => array("imageid" => 1),
 		 "hiderun"        => array("instance" => 1, "runidx" => 1));
 
 # Mandatory page arguments.
@@ -183,6 +185,23 @@ elseif ($type == "skipvlans") {
     $zapurl = CreateURL("showexp", $experiment);
     $experiment->SetSkipVlans($value);
 }
+elseif ($type == "imageglobal") {
+    include("imageid_defs.php");
+    
+    # Must validate since we allow non-admins to do this.
+    if (! TBvalid_imageid($imageid)) {
+	PAGEARGERROR("Invalid characters in $imageid");
+    }
+    if (! ($image = Image::Lookup($imageid))) {
+	PAGEARGERROR("Image $image is not a valid image!");
+    }
+    if (!$isadmin &&
+	!$image->AccessCheck($this_user, $TB_IMAGEID_MODIFYINFO)) {
+	USERERROR("You do not have permission to toggle $type!", 1);
+    }
+    $zapurl = CreateURL("showimageid", $image);
+    $image->SetGlobal($value);
+}
 elseif ($type == "cvsrepo_public") {
     # Must validate the pid since we allow non-admins to do this.
     if (! TBvalid_pid($pid)) {