Add explicit statement to when one of sides of the interactions ran closed their output.

Author: meisterT

judge/runpipe.cc

@@ -60,6 +60,7 @@
 #include "lib.error.h"
 #include "lib.misc.h"
 
+#include <cstring>
 #include <chrono>
 #include <fcntl.h>
 #include <fstream>
@@ -770,6 +771,15 @@ struct state_t {
       // write an extra \n at its end.
       ssize_t nread = read(from.process_to_proxy, buffer, BUF_SIZE - 1);
       if (nread == 0) {
+        auto duration = chrono::steady_clock::now() - output_file.start;
+        auto time = duration.count() / 1000 / 1000; // ns -> ms
+        int time_sec = time / 1000;
+        int time_millis = time % 1000;
+        char direction = from.index == 0 ? ']' : '[';
+        char eofbuf[128];
+        sprintf(eofbuf, "[%3d.%03ds/%ld]%c", time_sec, time_millis, 0LL, direction);
+        write_all(output_file.output_file, eofbuf, strlen(eofbuf));
+
         warning(0, "EOF from process #%ld", from.index);
         // The process closed stdout, we need to close the pipe's file
         // descriptors as well.

webapp/src/Twig/TwigExtension.php

@@ -740,15 +740,19 @@ public function interactiveLog(string $log, bool $forTeam = false): string
             if ($idx >= strlen($log)) {
                 break;
             }
-            $is_validator = $log[$idx] == '>';
-            $content      = substr($log, $idx + 3, $len);
-            if (empty($content)) {
-                break;
+            $is_validator = $log[$idx] == '>' || $log[$idx] == ']';
+            if ($log[$idx] == ']' || $log[$idx] == '[') {
+                $content = '<td style="font-style:italic; color: dimgrey;">EOF from program</td>';
+            } else {
+                $content = substr($log, $idx + 3, $len);
+                if (empty($content)) {
+                    break;
+                }
+                $content = htmlspecialchars($content);
+                $content = '<td class="output_text">'
+                    . str_replace("\n", "\u{21B5}<br/>", $content)
+                    . '</td>';
             }
-            $content   = htmlspecialchars($content);
-            $content   = '<td class="output_text">'
-                         . str_replace("\n", "\u{21B5}<br/>", $content)
-                         . '</td>';
             $idx       += $len + 4;
             $team      = $is_validator ? '<td/>' : $content;
             $validator = $is_validator ? $content : '<td/>';