From 57a86d9ec636c75f17a3005962ff178545e404f5 Mon Sep 17 00:00:00 2001
From: Mike Gilbert <floppym@gentoo.org>
Date: Thu, 13 Jan 2022 16:47:18 -0500
Subject: [PATCH] Avoid updating timestamps when the destination is stdout

Fixes: 9cd6c1ff4d56fc74a2cbdfd9bcc82a64e0fe4bb7
Fixes: https://github.com/facebook/zstd/issues/2997
---
 programs/fileio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/programs/fileio.c b/programs/fileio.c
index 89eecb9e..5338fa62 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -1679,6 +1679,7 @@ static int FIO_compressFilename_dstFile(FIO_ctx_t* const fCtx,
     if (ress.dstFile == NULL) {
         int dstFilePermissions = DEFAULT_FILE_PERMISSIONS;
         if ( strcmp (srcFileName, stdinmark)
+          && strcmp (dstFileName, stdoutmark)
           && UTIL_stat(srcFileName, &statbuf)
           && UTIL_isRegularFileStat(&statbuf) ) {
             dstFilePermissions = statbuf.st_mode;
@@ -2634,6 +2635,7 @@ static int FIO_decompressDstFile(FIO_ctx_t* const fCtx,
     if ((ress.dstFile == NULL) && (prefs->testMode==0)) {
         int dstFilePermissions = DEFAULT_FILE_PERMISSIONS;
         if ( strcmp(srcFileName, stdinmark)   /* special case : don't transfer permissions from stdin */
+          && strcmp(dstFileName, stdoutmark)
           && UTIL_stat(srcFileName, &statbuf)
           && UTIL_isRegularFileStat(&statbuf) ) {
             dstFilePermissions = statbuf.st_mode;