No need for a loop around the recv() now that we don't have to worry

about EINTR.  CID 180697

src/exec_pty.c

@@ -828,7 +828,6 @@ backchannel_cb(int fd, int what, void *v)
      * Read command status from the monitor.
      * Note that the backchannel is a *blocking* socket.
      */
-    for (;;) {
     nread = recv(fd, &cstat, sizeof(cstat), MSG_WAITALL);
     switch (nread) {
     case -1:
@@ -909,7 +908,6 @@ backchannel_cb(int fd, int what, void *v)
     }
     debug_return;
 }
-}
 
 /*
  * Handle changes to the monitors's status (SIGCHLD).