From e99182dab3093f1645f9e4ff216aa752d7443fb1 Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Thu, 1 Jan 2026 13:47:45 +0000
Subject:  Save/restore errno in all safe wrappers

---
 src/libstddjb/fd_sync.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/libstddjb/fd_sync.c')

diff --git a/src/libstddjb/fd_sync.c b/src/libstddjb/fd_sync.c
index 4506523..45247fe 100644
--- a/src/libstddjb/fd_sync.c
+++ b/src/libstddjb/fd_sync.c
@@ -7,8 +7,10 @@
 
 int fd_sync (int fd)
 {
+  int e = errno ;
   int r ;
   do r = fsync(fd) ;
   while (r == -1 && errno == EINTR) ;
+  if (r >= 0) errno = e ;
   return r ;
 }
-- 
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