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_send.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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

diff --git a/src/libstddjb/fd_send.c b/src/libstddjb/fd_send.c
index 6b6cd02..8727afa 100644
--- a/src/libstddjb/fd_send.c
+++ b/src/libstddjb/fd_send.c
@@ -2,12 +2,15 @@
 
 #include <sys/socket.h>
 #include <errno.h>
+
 #include <skalibs/allreadwrite.h>
 
 ssize_t fd_send (int fd, char const *buf, size_t len, unsigned int flags)
 {
+  int e = errno ;
   ssize_t r ;
   do r = send(fd, buf, len, flags) ;
-  while ((r == -1) && (errno == EINTR)) ;
+  while (r == -1 && errno == EINTR) ;
+  if (r >= 0) errno = e ;
   return r ;
 }
-- 
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