debug_fuzzer vs '!' and ^Z

My sysconf allows shell escape, and the fuzzer seems fond of that.
Suppress '!' and also '^Z', although I didn't notice it execute the
latter.  Without this hack, the sequence '!', sub-shell exit, '&'
causes nethack to be killed via SIGTTOU while fiddling with terminal
settings for introff().

diff --git a/src/cmd.c b/src/cmd.c
index d59e9b87a675b9425ec1b3eb90d51f2989809b15..a7f37ae2568af29e465a36295f5e1b51c6a304a0 100644 (file)
--- a/src/cmd.c
+++ b/src/cmd.c
@@ -1,4 +1,4 @@
-/* NetHack 3.6 cmd.c   $NHDT-Date: 1542673290 2018/11/20 00:21:30 $  $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.302 $ */
+/* NetHack 3.6 cmd.c   $NHDT-Date: 1543711385 2018/12/02 00:43:05 $  $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.309 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /*-Copyright (c) Robert Patrick Rankin, 2013. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -5501,6 +5501,12 @@ parse()
     alt_esc = FALSE; /* readchar() reset */
 #endif
 
+    if (iflags.debug_fuzzer /* if fuzzing, override '!' and ^Z */
+        && (Cmd.commands[foo & 0x0ff]
+            && (Cmd.commands[foo & 0x0ff]->ef_funct == dosuspend_core
+                || Cmd.commands[foo & 0x0ff]->ef_funct == dosh)))
+        foo = Cmd.spkeys[NHKF_ESC];
+
     if (foo == Cmd.spkeys[NHKF_ESC]) { /* esc cancels count (TH) */
         clear_nhwindow(WIN_MESSAGE);
         multi = last_multi = 0;