From 7af96ecb6463c356df241cbf8c5fa15fa54862c3 Mon Sep 17 00:00:00 2001
From: Jon Scheiding <jon@examspark.com>
Date: Thu, 10 Jul 2025 17:46:16 -0400
Subject: [PATCH] Keep isFinished() false on StreamLog until stdin is closed

---
 seeklog.cpp | 33 ++++++++++++++++++++++++++++++++-
 seeklog.h   |  1 +
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/seeklog.cpp b/seeklog.cpp
index 4dad928..acca991 100644
--- a/seeklog.cpp
+++ b/seeklog.cpp
@@ -32,6 +32,8 @@
 #include <unistd.h>
 #endif
 
+#include <poll.h>
+
 long long gSeekLogMaxBufferSize = 104857600;
 
 //StreamLog
@@ -86,9 +88,38 @@ bool StreamLog::getNextLine(std::string& line) {
     return true;
 }
 
+bool StreamLog::isPipeOpen() {
+    struct pollfd pfd;
+    pfd.fd     = STDIN_FILENO;
+    pfd.events = POLLIN | POLLHUP;
+
+    int ret = poll(&pfd, 1, 0);
+
+    if(ret < 0) {
+        return false;
+    }
+
+    if(ret == 0) {
+        return true;
+    }
+
+    if(pfd.revents & POLLHUP) {
+        return false;
+    }
+}
+
 bool StreamLog::isFinished() {
+    if(fcntl_fail) {
+        return true;
+    }
 
-    if(fcntl_fail || stream->fail() || stream->eof()) {
+    #ifndef _WIN32
+    if(isPipeOpen()) {
+        return false;
+    }
+    #endif
+
+    if(stream->fail() || stream->eof()) {
         return true;
     }
 
diff --git a/seeklog.h b/seeklog.h
index 19abe6e..13d391c 100644
--- a/seeklog.h
+++ b/seeklog.h
@@ -58,6 +58,7 @@ class StreamLog : public BaseLog {
 
     bool getNextLine(std::string& line);
     bool isFinished();
+    bool isPipeOpen();
 };
 
 class SeekLogException : public std::exception {