signals: check write(2) return values

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/src/global/signal_handler.cc b/src/global/signal_handler.cc
index b44cdd9d825ac0a639a199a950e1974ced35ae2f..2ce2f06c1c7dd118ab2b032b1c881dfecece7ea9 100644 (file)
--- a/src/global/signal_handler.cc
+++ b/src/global/signal_handler.cc
@@ -167,7 +167,8 @@ struct SignalHandler : public Thread {
   }
 
   void signal_thread() {
-    write(pipefd[1], "\0", 1);
+    int r = write(pipefd[1], "\0", 1);
+    assert(r == 1);
   }
 
   void shutdown() {
@@ -229,7 +230,8 @@ struct SignalHandler : public Thread {
     // have the signal handler defined without the handlers entry also
     // being filled in.
     assert(handlers[signum]);
-    write(handlers[signum]->pipefd[1], " ", 1);
+    int r = write(handlers[signum]->pipefd[1], " ", 1);
+    assert(r == 1);
   }
 
   void register_handler(int signum, signal_handler_t handler, bool oneshot);