From 562f38ab348b0b10f9844e9724ac6591a7d513b2 Mon Sep 17 00:00:00 2001
From: Oskari Alaranta <oskari.alaranta@bananymous.com>
Date: Mon, 31 Aug 2026 06:24:03 +0300
Subject: [PATCH] ProcessUNIX: Fix possible race condition

---
 Source/kwsys/ProcessUNIX.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/kwsys/ProcessUNIX.c b/Source/kwsys/ProcessUNIX.c
index 8c22b4e43a..3f1e0fa2a2 100644
--- a/Source/kwsys/ProcessUNIX.c
+++ b/Source/kwsys/ProcessUNIX.c
@@ -1839,7 +1839,8 @@ static int kwsysProcessCreate(kwsysProcess* cp, int prIndex,
   /* Make sure the child is in the process group before we proceed.  This
      avoids race conditions with calls to the kill function that we make for
      signalling process groups.  */
-  while ((readRes = read(pgidPipe[0], &tmp, 1)) > 0) {
+  while ((readRes = read(pgidPipe[0], &tmp, 1)) > 0 ||
+         (readRes < 0 && errno == EINTR)) {
   }
   if (readRes < 0) {
     sigprocmask(SIG_SETMASK, &old_mask, 0);
-- 
2.55.0