From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sun, 6 Dec 2015 01:45:00 +0000 (+0000)
Subject: In signal handler, crash if write() fails in an unexpected way
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=innduct.git;a=commitdiff_plain;h=61c8ce5bb3f245c365ca7381497b43fd40a987b4

In signal handler, crash if write() fails in an unexpected way
---

diff --git a/statemc.c b/statemc.c
index cb5139d..b068722 100644
--- a/statemc.c
+++ b/statemc.c
@@ -546,7 +546,8 @@ static void sigarrived_handler(int signum) {
   default:
     abort();
   }
-  write(signal_self_pipe[1],&x,1);
+  int r = write(signal_self_pipe[1],&x,1);
+  if (!(r==1 || isewouldblock(errno))) abort();
   errno = esave;
 }