robustness

r1402 | dcl | 2007-01-17 09:43:33 +1100 (Wed, 17 Jan 2007) | 2 lines
2007-01-17 09:43:33 +11:00
parent 724ed1c2cb
commit c4f4ea358d
1 changed files with 3 additions and 0 deletions
--- a/site_ansto/hardsup/nhq200util.c
+++ b/site_ansto/hardsup/nhq200util.c
@@ -271,6 +271,9 @@ int NHQ200_Setup(pNHQ200 self, int iControl) /* Operations common to both Open a
  char pCommand[20];
  char pReply[132];

+  if (!self || !self->controller || !self->controller->pSock)
+    return NHQ200__BADCOM;
+
  /* MJL enable RS232 debugging mode. */
  setRS232Debug(self->controller,1);
  printf("***RS232 debug mode enabled for NHQ200***\n");fflush(stdout);