Add SIGHUP and SIGTERM handlers in NaCl.

src/trusted/service_runtime/linux/nacl_signal.c

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <errno.h>
 #include <signal.h>
 #include <stddef.h>
 #include <string.h>
@@ skipping 25 matching lines @@
  * The signals listed here should either be handled by NaCl (or otherwise
  * trusted code).
  */
 static int s_Signals[] = {
 #if NACL_ARCH(NACL_BUILD_ARCH) != NACL_mips
   /* This signal does not exist on MIPS. */
   SIGSTKFLT,
 #endif
   SIGSYS, /* Used to support a seccomp-bpf sandbox. */
   NACL_THREAD_SUSPEND_SIGNAL,
-  SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGBUS, SIGFPE, SIGSEGV,
+  SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGTRAP, SIGBUS, SIGFPE, SIGSEGV, SIGTERM,

[Mark Seaborn, 2015/06/04 19:44:05]

Nit: your commit message says you're adding SIGINT but it's there already.

   /* Handle SIGABRT in case someone sends it asynchronously using kill(). */
   SIGABRT
 };
 
 static struct sigaction s_OldActions[NACL_ARRAY_SIZE_UNSAFE(s_Signals)];
 
 static NaClSignalHandler g_handler_func;
 
 void NaClSignalHandlerSet(NaClSignalHandler func) {
   g_handler_func = func;
@@ skipping 390 matching lines @@
   unsigned int a;
 
   /* Remove all handlers */
   for (a = 0; a < NACL_ARRAY_SIZE(s_Signals); a++) {
     if (sigaction(s_Signals[a], &s_OldActions[a], NULL) != 0) {
       NaClLog(LOG_FATAL, "Failed to unregister handler for %d.\n\tERR:%s\n",
                           s_Signals[a], strerror(errno));
     }
   }
 }