Avoid aborting in 'waitpid' on MS-Windows

* src/w32proc.c (waitpid): Don't allow quitting if called with
WNOHANG in OPTIONS.  (Bug#28268)

1 files changed, 5 insertions, 1 deletions

diff --git a/src/w32proc.c b/src/w32proc.c
index 76af55f9985..ffd5f0d0a1a 100644
--- a/src/w32proc.c
+++ b/src/w32proc.c
@@ -1449,7 +1449,11 @@ waitpid (pid_t pid, int *status, int options)
 
   do
     {
-      maybe_quit ();
+      /* When child_status_changed calls us with WNOHANG in OPTIONS,
+         we are supposed to be non-interruptible, so don't allow
+         quitting in that case.  */
+      if (!dont_wait)
+        maybe_quit ();
       active = WaitForMultipleObjects (nh, wait_hnd, FALSE, timeout_ms);
     } while (active == WAIT_TIMEOUT && !dont_wait);