cherry-picked sys & fpga time updating from warrior branch

src/php_top/utils.php

@@ -12,19 +12,22 @@ include "include/elphel_functions_include.php";
 $cmd = "donothing";
 
 if (isset($_GET['cmd']))
-  $cmd = $_GET['cmd'];
+    $cmd = $_GET['cmd'];
 else if (isset($argv[1]))
-  $cmd = $argv[1];
+    $cmd = $argv[1];
 
 // allow CORS
 header('Access-Control-Allow-Origin: *');
 
 switch($cmd){
-  case "sensors":
-    print(cmd_sensors());
-    break;
-  default:
-    print("OK");
+    case "sensors":
+        print(cmd_sensors());
+        break;
+    case "time":
+        cmd_time();
+        break;
+    default:
+        print("OK");
 }
 
 function cmd_sensors(){
@@ -37,12 +40,40 @@ function cmd_sensors(){
         $res .= "\t\t<port index='$i' port='$p'>$sensor</port>\n";
     }
     $res .= "\t</camera>\n";
+    return wrap_into_xml($res);
+}
+
+function cmd_time(){
+
+    date_default_timezone_set('UTC');
+
+    $t = elphel_get_fpga_time();
+    if (!isset($_GET['ts'])){
+        //date +%s will report system time
+        //print(exec("date +%s"));
+        print("Camera time: $t");
+    }else{
+        // ts is in ms
+        $ts_s  = substr($_GET['ts'],0,10);
+        $ts_ms = substr($_GET['ts'],-3);
+        //$ts = $_GET['ts']/1000;
+        $ts_formatted = date("Y-m-d H:i:s.$ts_ms",$ts_s);
+        print("Your time:   $ts_s.$ts_ms ($ts_formatted)\nCamera time: $t\n");
 
+        if (abs($ts_s-$t)>24*3600){
+            elphel_set_fpga_time($_GET['ts']/1000);
+            exec("date -s $ts_formatted");
+            exec("hwclock --systohc");
+            print("Timestamps differ by more than 24h. Camera and fpga time updated.\n");
+        }
+    }
+}
+
+function wrap_into_xml($s){
     $xml  = "<?xml version='1.0' standalone='yes'?>\n";
     $xml .= "<Document>\n";
-    $xml .= $res;
+    $xml .= $s;
     $xml .= "</Document>\n";
-
     return $xml;
 }