bash-custom-action/bash-4.2-history.dif

--- shell.c
+++ shell.c	2011-03-08 17:25:55.160426342 +0000
@@ -261,6 +261,11 @@ static const struct {
   { (char *)0x0, Int, (int *)0x0, (char **)0x0 }
 };
 
+#if defined (HAVE_POSIX_SIGSETJMP)
+volatile procenv_t terminating_now;
+volatile sig_atomic_t jump_with_sig;
+#endif /* HAVE_POSIX_SIGSETJMP */
+
 /* These are extern so execute_simple_command can set them, and then
    longjmp back to main to execute a shell script, instead of calling
    main () again and resulting in indefinite, possibly fatal, stack
@@ -379,6 +384,39 @@ main (argc, argv, env)
   if (code)
     exit (2);
 
+#if defined (HAVE_POSIX_SIGSETJMP)
+  /* Catch signals here */
+  if (sigsetjmp (terminating_now, 1))
+    {
+      int sig = jump_with_sig;
+
+      /* I don't believe this condition ever tests true. */
+      if (sig == SIGINT && signal_is_trapped (SIGINT))
+	run_interrupt_trap ();
+
+# if defined (HISTORY)
+      if (interactive_shell && sig != SIGABRT)
+	maybe_save_shell_history ();
+# endif /* HISTORY */
+
+# if defined (JOB_CONTROL)
+      if (sig == SIGHUP && (interactive || (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB))))
+	hangup_all_jobs ();
+      end_job_control ();
+# endif /* JOB_CONTROL */
+
+# if defined (PROCESS_SUBSTITUTION)
+      unlink_fifo_list ();
+# endif /* PROCESS_SUBSTITUTION */
+
+      run_exit_trap ();
+      set_signal_handler (sig, SIG_DFL);
+      kill (getpid (), sig);
+      _exit(0);
+    }
+  jump_with_sig = 0;
+#endif /* HAVE_POSIX_SIGSETJMP */
+
   xtrace_init ();
 
 #if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS)
--- sig.c
+++ sig.c	2011-03-08 17:26:31.627928783 +0000
@@ -503,7 +503,7 @@ termsig_sighandler (sig)
   /* XXX - should this also trigger when interrupt_immediately is set? */
   if (terminate_immediately)
     {
-#if defined (HISTORY)
+#if defined (HISTORY) && ! defined (HAVE_POSIX_SIGSETJMP)
       /* XXX - will inhibit history file being written */
       history_lines_this_session = 0;
 #endif
@@ -514,6 +514,11 @@ termsig_sighandler (sig)
   SIGRETURN (0);
 }
 
+#if defined (HAVE_POSIX_SIGSETJMP)
+extern volatile procenv_t terminating_now;
+extern volatile sig_atomic_t jump_with_sig;
+#endif /* HAVE_POSIX_SIGSETJMP */
+
 void
 termsig_handler (sig)
      int sig;
@@ -528,32 +533,39 @@ termsig_handler (sig)
   handling_termsig = 1;
   terminating_signal = 0;	/* keep macro from re-testing true. */
 
+#if ! defined (HAVE_POSIX_SIGSETJMP)
   /* I don't believe this condition ever tests true. */
   if (sig == SIGINT && signal_is_trapped (SIGINT))
     run_interrupt_trap ();
 
-#if defined (HISTORY)
+# if defined (HISTORY)
   if (interactive_shell && sig != SIGABRT)
     maybe_save_shell_history ();
-#endif /* HISTORY */
+# endif /* HISTORY */
 
-#if defined (JOB_CONTROL)
+# if defined (JOB_CONTROL)
   if (sig == SIGHUP && (interactive || (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB))))
     hangup_all_jobs ();
   end_job_control ();
-#endif /* JOB_CONTROL */
+# endif /* JOB_CONTROL */
 
-#if defined (PROCESS_SUBSTITUTION)
+# if defined (PROCESS_SUBSTITUTION)
   unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
+# endif /* PROCESS_SUBSTITUTION */
+#endif /* ! HAVE_POSIX_SIGSETJMP */
 
   /* Reset execution context */
   loop_level = continuing = breaking = funcnest = 0;
   executing_list = comsub_ignore_return = return_catch_flag = 0;
 
+#if defined (HAVE_POSIX_SIGSETJMP)
+  jump_with_sig = sig;
+  siglongjmp(terminating_now, 1);
+#else /* ! HAVE_POSIX_SIGSETJMP */
   run_exit_trap ();
   set_signal_handler (sig, SIG_DFL);
   kill (getpid (), sig);
+#endif /* ! HAVE_POSIX_SIGSETJMP */
 }
 
 /* What we really do when SIGINT occurs. */