imsg_read() may return EAGAIN, handle it in mproc_dispatch()

diff --git a/usr.sbin/smtpd/mproc.c b/usr.sbin/smtpd/mproc.c
index 119c7c8..563baf3 100644 (file)
--- a/usr.sbin/smtpd/mproc.c
+++ b/usr.sbin/smtpd/mproc.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: mproc.c,v 1.14 2015/10/14 21:18:19 gilles Exp $       */
+/*     $OpenBSD: mproc.c,v 1.15 2015/10/14 21:27:29 gilles Exp $       */
 
 /*
  * Copyright (c) 2012 Eric Faurot <eric@faurot.net>
@@ -160,6 +160,8 @@ mproc_dispatch(int fd, short event, void *arg)
                if (n == -1) {
                        log_warn("warn: %s -> %s: imsg_read",
                            proc_name(smtpd_process),  p->name);
+                       if (errno == EAGAIN)
+                               return;
                        fatal("exiting");
                }
                if (n == 0) {