0001-Fixed-Windows-stat-emulation-working-with-streams.patch

From 407184db12af0a7689e73824ade6f2d2cbeaaa0c Mon Sep 17 00:00:00 2001
From: Koval Dmitry <d.koval@postgrespro.ru>
Date: Wed, 17 Nov 2021 13:23:50 +0300
Subject: [PATCH] Fixed Windows stat() emulation: working with streams

---
 src/port/win32stat.c | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/src/port/win32stat.c b/src/port/win32stat.c
index 2ad8ee1359..230bd093ed 100644
--- a/src/port/win32stat.c
+++ b/src/port/win32stat.c
@@ -112,7 +112,7 @@ fileattr_to_unixmode(int attr)
  * Convert WIN32 file information (from a HANDLE) to a struct stat.
  */
 static int
-fileinfo_to_stat(HANDLE hFile, struct stat *buf)
+fileinfo_to_stat(HANDLE hFile, int fileno, const char *name, struct stat *buf)
 {
 	BY_HANDLE_FILE_INFORMATION fiData;
 
@@ -124,7 +124,25 @@ fileinfo_to_stat(HANDLE hFile, struct stat *buf)
 	 */
 	if (!GetFileInformationByHandle(hFile, &fiData))
 	{
-		_dosmaperr(GetLastError());
+		DWORD		error = GetLastError();
+
+		switch (error)
+		{
+			case ERROR_INVALID_PARAMETER:
+			case ERROR_INVALID_FUNCTION:
+			case ERROR_NOT_SUPPORTED:
+
+				/*
+				 * Object is other than real file (stdout, for example). So
+				 * need to call _fstat64 in this case. "struct stat" should
+				 * match "struct __stat64", see "struct stat" definition.
+				 */
+				if (fileno >= 0)
+					return _fstat64(fileno, (struct __stat64 *) buf);
+				else if (name)
+					return _stat64(name, (struct __stat64 *) buf);
+		}
+		_dosmaperr(error);
 		return -1;
 	}
 
@@ -276,7 +294,7 @@ _pgstat64(const char *name, struct stat *buf)
 	}
 
 	/* At last we can invoke fileinfo_to_stat */
-	ret = fileinfo_to_stat(hFile, buf);
+	ret = fileinfo_to_stat(hFile, -1, name, buf);
 
 	CloseHandle(hFile);
 	return ret;
@@ -301,7 +319,7 @@ _pgfstat64(int fileno, struct stat *buf)
 	 * ERROR_DELETE_PENDING.
 	 */
 
-	return fileinfo_to_stat(hFile, buf);
+	return fileinfo_to_stat(hFile, fileno, NULL, buf);
 }
 
 #endif							/* WIN32 */
-- 
2.31.0.windows.1