* select.cc (fhandler_tty_slave::ready_for_read): Return 0 on EBADF.

	* syscalls.cc (_read): If ready_for_read() failed, save errno from
	being overwritten by signal handler call.

1 files changed, 1 insertions, 0 deletions

diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc
index 3b2104d7f..fc069ca73 100644
--- a/winsup/cygwin/syscalls.cc
+++ b/winsup/cygwin/syscalls.cc
@@ -314,6 +314,7 @@ _read (int fd, void *ptr, size_t len)
 	debug_printf ("non-interruptible read\n");
       else if (!cfd->ready_for_read (fd, wait))
 	{
+	  set_sig_errno (get_errno ());
 	  res = -1;
 	  goto out;
 	}