From 43dde3b628331bf43cacc93e85c676ffa9a76e2f Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 18 Jul 2022 12:57:53 +0000
Subject:  Fix allread errno management

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/skaembutils/s6-head.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/skaembutils/s6-head.c b/src/skaembutils/s6-head.c
index 427d220..217880b 100644
--- a/src/skaembutils/s6-head.c
+++ b/src/skaembutils/s6-head.c
@@ -3,6 +3,7 @@
 #include <sys/types.h>
 #include <sys/uio.h>
 #include <errno.h>
+
 #include <skalibs/allreadwrite.h>
 #include <skalibs/sgetopt.h>
 #include <skalibs/bytestr.h>
@@ -60,8 +61,10 @@ static int safedolines (int fd, size_t lines)
   char tmp[lines] ;
   while (lines)
   {
-    size_t r = allread(fd, tmp, lines) ;
-    if ((r < lines) && (errno != EPIPE)) return 0 ;
+    size_t r ;
+    errno = 0 ;
+    r = allread(fd, tmp, lines) ;
+    if (r < lines && errno) return 0 ;
     lines -= byte_count(tmp, r, '\n') ;
     if (buffer_put(buffer_1, tmp, r) < (ssize_t)r) return 0 ;
   }
-- 
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