Don't send MSG_ERROR_EXIT messages at the end of the transfer.

Added some debug output for MSG_ERROR_EXIT messages.

cleanup.c

@@ -34,6 +34,8 @@ extern int output_needs_newline;
 extern char *partial_dir;
 extern char *logfile_name;
 
+BOOL shutting_down = False;
+
 #ifdef HAVE_SIGACTION
 static struct sigaction sigact;
 #endif
@@ -132,8 +134,8 @@ NORETURN void _exit_cleanup(int code, const char *file, int line)
 
 		if (DEBUG_GTE(EXIT, 2)) {
 			rprintf(FINFO,
-				"_exit_cleanup(code=%d, file=%s, line=%d): entered\n",
-				code, file, line);
+				"[%s] _exit_cleanup(code=%d, file=%s, line=%d): entered\n",
+				who_am_i(), code, file, line);
 		}
 
 		/* FALLTHROUGH */
@@ -205,18 +207,23 @@ NORETURN void _exit_cleanup(int code, const char *file, int line)
 
 		if (DEBUG_GTE(EXIT, 1)) {
 			rprintf(FINFO,
-				"_exit_cleanup(code=%d, file=%s, line=%d): "
+				"[%s] _exit_cleanup(code=%d, file=%s, line=%d): "
 				"about to call exit(%d)\n",
-				unmodified_code, file, line, code);
+				who_am_i(), unmodified_code, file, line, code);
 		}
 
 		/* FALLTHROUGH */
 #include "case_N.h"
 
 		if (exit_code && exit_code != RERR_SOCKETIO && exit_code != RERR_STREAMIO && exit_code != RERR_SIGNAL1
-		 && (protocol_version >= 31 || (!am_sender && !am_generator))) {
-			if (line > 0)
+		 && !shutting_down && (protocol_version >= 31 || (!am_sender && !am_generator))) {
+			if (line > 0) {
+				if (DEBUG_GTE(EXIT, 3)) {
+					rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT with exit_code %d\n",
+						who_am_i(), exit_code);
+				}
 				send_msg_int(MSG_ERROR_EXIT, exit_code);
+			}
 			noop_io_until_death();
 		}
 

io.c

@@ -1489,8 +1489,14 @@ static void read_a_msg(void)
 		}
 		break;
 	case MSG_ERROR_EXIT:
+		if (DEBUG_GTE(EXIT, 3))
+			rprintf(FINFO, "[%s] got MSG_ERROR_EXIT with %d bytes\n", who_am_i(), msg_bytes);
 		if (msg_bytes == 0) {
 			if (!am_sender && !am_generator) {
+				if (DEBUG_GTE(EXIT, 3)) {
+					rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT (len 0)\n",
+						who_am_i());
+				}
 				send_msg(MSG_ERROR_EXIT, "", 0, 0);
 				io_flush(FULL_FLUSH);
 			}
@@ -1499,10 +1505,19 @@ static void read_a_msg(void)
 			data = perform_io(4, PIO_INPUT_AND_CONSUME);
 			val = IVAL(data, 0);
 			if (protocol_version >= 31) {
-				if (am_generator)
+				if (am_generator) {
+					if (DEBUG_GTE(EXIT, 3)) {
+						rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT with exit_code %d\n",
+							who_am_i(), val);
+					}
 					send_msg_int(MSG_ERROR_EXIT, val);
-				else
+				} else {
+					if (DEBUG_GTE(EXIT, 3)) {
+						rprintf(FINFO, "[%s] sending MSG_ERROR_EXIT (len 0)\n",
+							who_am_i());
+					}
 					send_msg(MSG_ERROR_EXIT, "", 0, 0);
+				}
 			}
 		} else
 			goto invalid_msg;

main.c

@@ -73,6 +73,7 @@ extern int send_msgs_to_gen;
 extern pid_t cleanup_child_pid;
 extern size_t bwlimit_writemax;
 extern unsigned int module_dirlen;
+extern BOOL shutting_down;
 extern struct stats stats;
 extern char *stdout_format;
 extern char *logfile_format;
@@ -726,6 +727,8 @@ static void read_final_goodbye(int f_in, int f_out)
 	uchar fnamecmp_type;
 	char xname[MAXPATHLEN];
 
+	shutting_down = True;
+
 	if (protocol_version < 29)
 		i = read_int(f_in);
 	else {
@@ -921,6 +924,7 @@ static int do_recv(int f_in, int f_out, char *local_name)
 
 	handle_stats(-1);
 	io_flush(FULL_FLUSH);
+	shutting_down = True;
 	if (protocol_version >= 24) {
 		/* send a final goodbye message */
 		write_ndx(f_out, NDX_DONE);

options.c

@@ -271,7 +271,7 @@ static struct output_struct debug_words[COUNT_DEBUG+1] = {
 	DEBUG_WORD(DEL, W_REC, "Debug delete actions (levels 1-3)"),
 	DEBUG_WORD(DELTASUM, W_SND|W_REC, "Debug delta-transfer checksumming (levels 1-4)"),
 	DEBUG_WORD(DUP, W_REC, "Debug weeding of duplicate names"),
-	DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-2)"),
+	DEBUG_WORD(EXIT, W_CLI|W_SRV, "Debug exit events (levels 1-3)"),
 	DEBUG_WORD(FILTER, W_SND|W_REC, "Debug filter actions (levels 1-2)"),
 	DEBUG_WORD(FLIST, W_SND|W_REC, "Debug file-list operations (levels 1-4)"),
 	DEBUG_WORD(FUZZY, W_REC, "Debug fuzzy scoring (levels 1-2)"),