1This patch changes the receiving side to have the receiving code use a thread
2instead of a forked process.  This extra thread does read from the socket, but
3it sends any stdout/stderr messages to the generator (main thread) to output.
4
5** This is very new code. **  Yes, it passes the "make test" testsuite, but
6there may still be some problems, especially in some of the untested features.
7(For one thing, I haven't yet added code to properly handle any keep-alive
8messages that arrive on the receiving side during the --delete-after phase!)
9
10This code just uses pthread.h directly, so configure changes will probably be
11needed to make this compatible with more systems.  I have also tested that
12this code works fine using the GNU pth library without any code changes if
13you configured it with --enable-syscall-soft --enable-pthread (you may need
14to twiddle the Makefile options if you didn't install the library, though).
15
16NOTE: we still need to duplicate the partial_fname static in util.c!
17
18If you try this out, please send some email to wayned@samba.org or the rsync
19mailing list with your results, build changes, bug reports, etc.  Thanks!
20
21To use this patch, run these commands for a successful build:
22
23    patch -p1 <patches/threaded-receiver.diff
24    ./configure
25    make
26
27--- old/Makefile.in
28+++ new/Makefile.in
29@@ -7,7 +7,7 @@ exec_prefix=@exec_prefix@
30 bindir=@bindir@
31 mandir=@mandir@
32 
33-LIBS=@LIBS@
34+LIBS=@LIBS@ -lpthread
35 CC=@CC@
36 CFLAGS=@CFLAGS@
37 CPPFLAGS=@CPPFLAGS@
38--- old/cleanup.c
39+++ new/cleanup.c
40@@ -31,10 +31,6 @@ extern int log_got_error;
41 extern char *partial_dir;
42 extern char *logfile_name;
43 
44-#ifdef HAVE_SIGACTION
45-static struct sigaction sigact;
46-#endif
47-
48 /**
49  * Close all open sockets and files, allowing a (somewhat) graceful
50  * shutdown() of socket connections.  This eliminates the abortive
51@@ -98,9 +94,6 @@ NORETURN void _exit_cleanup(int code, co
52 	static int exit_code = 0;
53 	static int unmodified_code = 0;
54 
55-	SIGACTION(SIGUSR1, SIG_IGN);
56-	SIGACTION(SIGUSR2, SIG_IGN);
57-
58 	if (exit_code) /* Preserve first error code when recursing. */
59 		code = exit_code;
60 
61@@ -157,8 +150,6 @@ NORETURN void _exit_cleanup(int code, co
62 
63 		if (cleanup_fname)
64 			do_unlink(cleanup_fname);
65-		if (code)
66-			kill_all(SIGUSR1);
67 		if (cleanup_pid && cleanup_pid == getpid()) {
68 			char *pidf = lp_pid_file();
69 			if (pidf && *pidf)
70--- old/errcode.h
71+++ new/errcode.h
72@@ -37,7 +37,6 @@
73 #define RERR_CRASHED    15      /* sibling crashed */
74 #define RERR_TERMINATED 16      /* sibling terminated abnormally */
75 
76-#define RERR_SIGNAL1    19      /* status returned when sent SIGUSR1 */
77 #define RERR_SIGNAL     20      /* status returned when sent SIGINT, SIGTERM, SIGHUP */
78 #define RERR_WAITCHILD  21      /* some error returned by waitpid() */
79 #define RERR_MALLOC     22      /* error allocating core memory buffers */
80--- old/generator.c
81+++ new/generator.c
82@@ -66,7 +66,6 @@ extern OFF_T min_size;
83 extern int io_error;
84 extern int allowed_lull;
85 extern int sock_f_out;
86-extern int ignore_timeout;
87 extern int protocol_version;
88 extern int fuzzy_basis;
89 extern int always_checksum;
90@@ -95,6 +94,11 @@ extern struct filter_list_struct server_
91 
92 static int deletion_count = 0; /* used to implement --max-delete */
93 
94+/* These vars are local copies so that the receiver can use the originals. */
95+static int GEN_append_mode;
96+static int GEN_make_backups;
97+static int GEN_csum_length;
98+
99 /* For calling delete_file() */
100 #define DEL_FORCE_RECURSE	(1<<1) /* recurse even w/o --force */
101 #define DEL_TERSE		(1<<3)
102@@ -445,8 +449,8 @@ static void sum_sizes_sqroot(struct sum_
103 	}
104 
105 	if (protocol_version < 27) {
106-		s2length = csum_length;
107-	} else if (csum_length == SUM_LENGTH) {
108+		s2length = GEN_csum_length;
109+	} else if (GEN_csum_length == SUM_LENGTH) {
110 		s2length = SUM_LENGTH;
111 	} else {
112 		int32 c;
113@@ -456,7 +460,7 @@ static void sum_sizes_sqroot(struct sum_
114 		for (c = blength; (c >>= 1) && b; b--) {}
115 		/* add a bit, subtract rollsum, round up. */
116 		s2length = (b + 1 - 32 + 7) / 8; /* --optimize in compiler-- */
117-		s2length = MAX(s2length, csum_length);
118+		s2length = MAX(s2length, GEN_csum_length);
119 		s2length = MIN(s2length, SUM_LENGTH);
120 	}
121 
122@@ -490,7 +494,7 @@ static void generate_and_send_sums(int f
123 	sum_sizes_sqroot(&sum, len);
124 	write_sum_head(f_out, &sum);
125 
126-	if (append_mode > 0 && f_copy < 0)
127+	if (GEN_append_mode > 0 && f_copy < 0)
128 		return;
129 
130 	if (len > 0)
131@@ -509,7 +513,7 @@ static void generate_and_send_sums(int f
132 
133 		if (f_copy >= 0) {
134 			full_write(f_copy, map, n1);
135-			if (append_mode > 0)
136+			if (GEN_append_mode > 0)
137 				continue;
138 		}
139 
140@@ -1208,7 +1212,7 @@ static void recv_generator(char *fname, 
141 		return;
142 	}
143 
144-	if (append_mode && st.st_size > file->length)
145+	if (GEN_append_mode && st.st_size > file->length)
146 		return;
147 
148 	if (fnamecmp_type <= FNAMECMP_BASIS_DIR_HIGH)
149@@ -1271,7 +1275,7 @@ static void recv_generator(char *fname, 
150 		goto notify_others;
151 	}
152 
153-	if (inplace && make_backups && fnamecmp_type == FNAMECMP_FNAME) {
154+	if (inplace && GEN_make_backups && fnamecmp_type == FNAMECMP_FNAME) {
155 		if (!(backupptr = get_backup_name(fname))) {
156 			close(fd);
157 			return;
158@@ -1362,9 +1366,12 @@ void generate_files(int f_out, struct fi
159 	int save_ignore_existing = ignore_existing;
160 	int save_ignore_non_existing = ignore_non_existing;
161 	int save_do_progress = do_progress;
162-	int save_make_backups = make_backups;
163+	int save_make_backups = GEN_make_backups = make_backups;
164 	int dir_tweaking = !(list_only || local_name || dry_run);
165 
166+	GEN_append_mode = append_mode;
167+	GEN_csum_length = csum_length;
168+
169 	if (protocol_version >= 29) {
170 		itemizing = 1;
171 		maybe_ATTRS_REPORT = stdout_format_has_i ? 0 : ATTRS_REPORT;
172@@ -1392,7 +1399,7 @@ void generate_files(int f_out, struct fi
173 		do_delete_pass(flist);
174 	do_progress = 0;
175 
176-	if (append_mode || whole_file < 0)
177+	if (GEN_append_mode || whole_file < 0)
178 		whole_file = 0;
179 	if (verbose >= 2) {
180 		rprintf(FINFO, "delta-transmission %s\n",
181@@ -1401,12 +1408,6 @@ void generate_files(int f_out, struct fi
182 			: "enabled");
183 	}
184 
185-	/* Since we often fill up the outgoing socket and then just sit around
186-	 * waiting for the other 2 processes to do their thing, we don't want
187-	 * to exit on a timeout.  If the data stops flowing, the receiver will
188-	 * notice that and let us know via the redo pipe (or its closing). */
189-	ignore_timeout = 1;
190-
191 	for (i = 0; i < flist->count; i++) {
192 		struct file_struct *file = flist->files[i];
193 
194@@ -1450,23 +1451,34 @@ void generate_files(int f_out, struct fi
195 		delete_in_dir(NULL, NULL, NULL, NULL);
196 
197 	phase++;
198-	csum_length = SUM_LENGTH;
199+	GEN_csum_length = SUM_LENGTH; /* csum_length is set by the receiver */
200 	max_size = min_size = ignore_existing = ignore_non_existing = 0;
201 	update_only = always_checksum = size_only = 0;
202 	ignore_times = 1;
203-	if (append_mode)  /* resend w/o append mode */
204-		append_mode = -1; /* ... but only longer files */
205-	make_backups = 0; /* avoid a duplicate backup for inplace processing */
206+	if (GEN_append_mode)  /* resend w/o append mode */
207+		GEN_append_mode = -1; /* ... but only longer files */
208+	GEN_make_backups = 0; /* avoid a duplicate backup for inplace processing */
209 
210 	if (verbose > 2)
211 		rprintf(FINFO,"generate_files phase=%d\n",phase);
212 
213 	write_int(f_out, -1);
214+	io_flush(NORMAL_FLUSH);
215 
216 	/* files can cycle through the system more than once
217 	 * to catch initial checksum errors */
218-	while ((i = get_redo_num(itemizing, code)) != -1) {
219-		struct file_struct *file = flist->files[i];
220+	while (1) {
221+		struct file_struct *file;
222+		if (preserve_hard_links)
223+			check_for_finished_hlinks(itemizing, code);
224+		if ((i = get_redo_num()) < 0) {
225+			if (i == -2)
226+				break;
227+			io_flush(NORMAL_FLUSH);
228+			msleep(20);
229+			continue;
230+		}
231+		file = flist->files[i];
232 		if (local_name)
233 			strlcpy(fbuf, local_name, sizeof fbuf);
234 		else
235@@ -1478,27 +1490,43 @@ void generate_files(int f_out, struct fi
236 	phase++;
237 	ignore_non_existing = save_ignore_non_existing;
238 	ignore_existing = save_ignore_existing;
239-	make_backups = save_make_backups;
240+	GEN_make_backups = save_make_backups;
241 
242 	if (verbose > 2)
243 		rprintf(FINFO,"generate_files phase=%d\n",phase);
244 
245 	write_int(f_out, -1);
246+	io_flush(NORMAL_FLUSH);
247+
248 	/* Reduce round-trip lag-time for a useless delay-updates phase. */
249-	if (protocol_version >= 29 && !delay_updates)
250+	if (protocol_version >= 29 && !delay_updates) {
251 		write_int(f_out, -1);
252+		io_flush(NORMAL_FLUSH);
253+	}
254 
255-	/* Read MSG_DONE for the redo phase (and any prior messages). */
256-	get_redo_num(itemizing, code);
257+	/* Read end marker for the redo phase (and any prior messages). */
258+	while (1) {
259+		if (preserve_hard_links)
260+			check_for_finished_hlinks(itemizing, code);
261+		if (get_redo_num() == -2)
262+			break;
263+		io_flush(NORMAL_FLUSH);
264+		msleep(20);
265+	}
266 
267 	if (protocol_version >= 29) {
268 		phase++;
269 		if (verbose > 2)
270 			rprintf(FINFO, "generate_files phase=%d\n", phase);
271-		if (delay_updates)
272+		if (delay_updates) {
273 			write_int(f_out, -1);
274-		/* Read MSG_DONE for delay-updates phase & prior messages. */
275-		get_redo_num(itemizing, code);
276+			io_flush(NORMAL_FLUSH);
277+		}
278+		/* Read end marker for delay-updates phase & prior messages. */
279+		while (get_redo_num() != -2) {
280+			io_flush(NORMAL_FLUSH);
281+			msleep(20);
282+		}
283 	}
284 
285 	do_progress = save_do_progress;
286--- old/io.c
287+++ new/io.c
288@@ -40,20 +40,17 @@ extern int allowed_lull;
289 extern int am_server;
290 extern int am_daemon;
291 extern int am_sender;
292-extern int am_generator;
293 extern int eol_nulls;
294 extern int read_batch;
295 extern int csum_length;
296 extern int checksum_seed;
297 extern int protocol_version;
298-extern int remove_source_files;
299 extern int preserve_hard_links;
300 extern char *filesfrom_host;
301 extern struct stats stats;
302 extern struct file_list *the_file_list;
303 
304 const char phase_unknown[] = "unknown";
305-int ignore_timeout = 0;
306 int batch_fd = -1;
307 int batch_gen_fd = -1;
308 
309@@ -61,7 +58,6 @@ int batch_gen_fd = -1;
310 int kluge_around_eof = 0;
311 
312 int msg_fd_in = -1;
313-int msg_fd_out = -1;
314 int sock_f_in = -1;
315 int sock_f_out = -1;
316 
317@@ -88,27 +84,31 @@ static OFF_T active_bytecnt = 0;
318 static void read_loop(int fd, char *buf, size_t len);
319 
320 struct flist_ndx_item {
321-	struct flist_ndx_item *next;
322+	volatile struct flist_ndx_item *next;
323 	int ndx;
324 };
325 
326 struct flist_ndx_list {
327-	struct flist_ndx_item *head, *tail;
328+	volatile struct flist_ndx_item *head, *tail;
329+	pthread_mutex_t mutex;
330 };
331 
332-static struct flist_ndx_list redo_list, hlink_list;
333+static struct flist_ndx_list redo_list = { NULL, NULL, PTHREAD_MUTEX_INITIALIZER };
334+static struct flist_ndx_list hlink_list = { NULL, NULL, PTHREAD_MUTEX_INITIALIZER };
335 
336 struct msg_list_item {
337-	struct msg_list_item *next;
338+	volatile struct msg_list_item *next;
339 	int len;
340+	enum msgcode code;
341 	char buf[1];
342 };
343 
344 struct msg_list {
345-	struct msg_list_item *head, *tail;
346+	volatile struct msg_list_item *head, *tail;
347+	pthread_mutex_t mutex;
348 };
349 
350-static struct msg_list msg2genr, msg2sndr;
351+static struct msg_list msg_list = { NULL, NULL, PTHREAD_MUTEX_INITIALIZER };
352 
353 static void flist_ndx_push(struct flist_ndx_list *lp, int ndx)
354 {
355@@ -118,27 +118,31 @@ static void flist_ndx_push(struct flist_
356 		out_of_memory("flist_ndx_push");
357 	item->next = NULL;
358 	item->ndx = ndx;
359+	pthread_mutex_lock(&redo_list.mutex);
360 	if (lp->tail)
361 		lp->tail->next = item;
362 	else
363 		lp->head = item;
364 	lp->tail = item;
365+	pthread_mutex_unlock(&redo_list.mutex);
366 }
367 
368 static int flist_ndx_pop(struct flist_ndx_list *lp)
369 {
370-	struct flist_ndx_item *next;
371+	struct flist_ndx_item *head, *next;
372 	int ndx;
373 
374 	if (!lp->head)
375 		return -1;
376 
377-	ndx = lp->head->ndx;
378-	next = lp->head->next;
379-	free(lp->head);
380-	lp->head = next;
381-	if (!next)
382+	pthread_mutex_lock(&hlink_list.mutex);
383+	head = (struct flist_ndx_item *)lp->head;
384+	next = (struct flist_ndx_item *)head->next;
385+	ndx = head->ndx;
386+	if (!(lp->head = next))
387 		lp->tail = NULL;
388+	pthread_mutex_unlock(&hlink_list.mutex);
389+	free(head);
390 
391 	return ndx;
392 }
393@@ -147,7 +151,7 @@ static void check_timeout(void)
394 {
395 	time_t t;
396 
397-	if (!io_timeout || ignore_timeout)
398+	if (!io_timeout)
399 		return;
400 
401 	if (!last_io_in) {
402@@ -188,44 +192,38 @@ void set_io_timeout(int secs)
403 
404 /* Setup the fd used to receive MSG_* messages.  Only needed during the
405  * early stages of being a local sender (up through the sending of the
406- * file list) or when we're the generator (to fetch the messages from
407- * the receiver). */
408+ * file list). */
409 void set_msg_fd_in(int fd)
410 {
411 	msg_fd_in = fd;
412 }
413 
414-/* Setup the fd used to send our MSG_* messages.  Only needed when
415- * we're the receiver (to send our messages to the generator). */
416-void set_msg_fd_out(int fd)
417-{
418-	msg_fd_out = fd;
419-	set_nonblocking(msg_fd_out);
420-}
421-
422 /* Add a message to the pending MSG_* list. */
423-static void msg_list_add(struct msg_list *lst, int code, char *buf, int len)
424+static void msg_list_add(int code, char *buf, int len)
425 {
426 	struct msg_list_item *m;
427-	int sz = len + 4 + sizeof m[0] - 1;
428+	int sz = len + sizeof m[0] - 1;
429 
430+	assert(am_receiver());
431 	if (!(m = (struct msg_list_item *)new_array(char, sz)))
432 		out_of_memory("msg_list_add");
433 	m->next = NULL;
434-	m->len = len + 4;
435-	SIVAL(m->buf, 0, ((code+MPLEX_BASE)<<24) | len);
436-	memcpy(m->buf + 4, buf, len);
437-	if (lst->tail)
438-		lst->tail->next = m;
439+	m->len = len;
440+	m->code = code;
441+	memcpy(m->buf, buf, len);
442+
443+	pthread_mutex_lock(&msg_list.mutex);
444+	if (msg_list.tail)
445+		msg_list.tail->next = m;
446 	else
447-		lst->head = m;
448-	lst->tail = m;
449+		msg_list.head = m;
450+	msg_list.tail = m;
451+	pthread_mutex_unlock(&msg_list.mutex);
452 }
453 
454-/* Read a message from the MSG_* fd and handle it.  This is called either
455+/* Read a message from the MSG_* fd and handle it.  This is only called
456  * during the early stages of being a local sender (up through the sending
457- * of the file list) or when we're the generator (to fetch the messages
458- * from the receiver). */
459+ * of the file list). */
460 static void read_msg_fd(void)
461 {
462 	char buf[2048];
463@@ -244,51 +242,6 @@ static void read_msg_fd(void)
464 	tag = (tag >> 24) - MPLEX_BASE;
465 
466 	switch (tag) {
467-	case MSG_DONE:
468-		if (len != 0 || !am_generator) {
469-			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
470-			exit_cleanup(RERR_STREAMIO);
471-		}
472-		flist_ndx_push(&redo_list, -1);
473-		break;
474-	case MSG_REDO:
475-		if (len != 4 || !am_generator) {
476-			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
477-			exit_cleanup(RERR_STREAMIO);
478-		}
479-		read_loop(fd, buf, 4);
480-		if (remove_source_files)
481-			decrement_active_files(IVAL(buf,0));
482-		flist_ndx_push(&redo_list, IVAL(buf,0));
483-		break;
484-	case MSG_DELETED:
485-		if (len >= (int)sizeof buf || !am_generator) {
486-			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
487-			exit_cleanup(RERR_STREAMIO);
488-		}
489-		read_loop(fd, buf, len);
490-		send_msg(MSG_DELETED, buf, len);
491-		break;
492-	case MSG_SUCCESS:
493-		if (len != 4 || !am_generator) {
494-			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
495-			exit_cleanup(RERR_STREAMIO);
496-		}
497-		read_loop(fd, buf, len);
498-		if (remove_source_files) {
499-			decrement_active_files(IVAL(buf,0));
500-			send_msg(MSG_SUCCESS, buf, len);
501-		}
502-		if (preserve_hard_links)
503-			flist_ndx_push(&hlink_list, IVAL(buf,0));
504-		break;
505-	case MSG_SOCKERR:
506-		if (!am_generator) {
507-			rprintf(FERROR, "invalid message %d:%d\n", tag, len);
508-			exit_cleanup(RERR_STREAMIO);
509-		}
510-		close_multiplexing_out();
511-		/* FALL THROUGH */
512 	case MSG_INFO:
513 	case MSG_ERROR:
514 	case MSG_LOG:
515@@ -332,75 +285,80 @@ void decrement_active_files(int ndx)
516 	active_bytecnt -= the_file_list->files[ndx]->length;
517 }
518 
519-/* Try to push messages off the list onto the wire.  If we leave with more
520+/* Try to pop messages off the list onto the wire.  If we leave with more
521  * to do, return 0.  On error, return -1.  If everything flushed, return 1.
522- * This is only active in the receiver. */
523-static int msg2genr_flush(int flush_it_all)
524+ * This is only called by the generator. */
525+static void msg_list_flush(void)
526 {
527-	static int written = 0;
528-	struct timeval tv;
529-	fd_set fds;
530+	assert(am_generator());
531 
532-	if (msg_fd_out < 0)
533-		return -1;
534+	if (defer_forwarding_messages)
535+		return;
536 
537-	while (msg2genr.head) {
538-		struct msg_list_item *m = msg2genr.head;
539-		int n = write(msg_fd_out, m->buf + written, m->len - written);
540-		if (n < 0) {
541-			if (errno == EINTR)
542-				continue;
543-			if (errno != EWOULDBLOCK && errno != EAGAIN)
544-				return -1;
545-			if (!flush_it_all)
546-				return 0;
547-			FD_ZERO(&fds);
548-			FD_SET(msg_fd_out, &fds);
549-			tv.tv_sec = select_timeout;
550-			tv.tv_usec = 0;
551-			if (!select(msg_fd_out+1, NULL, &fds, NULL, &tv))
552-				check_timeout();
553-		} else if ((written += n) == m->len) {
554-			msg2genr.head = m->next;
555-			if (!msg2genr.head)
556-				msg2genr.tail = NULL;
557-			free(m);
558-			written = 0;
559+	no_flush++;
560+	defer_forwarding_messages = 1;
561+	while (msg_list.head) {
562+		struct msg_list_item *m = (struct msg_list_item *)msg_list.head;
563+		pthread_mutex_lock(&msg_list.mutex);
564+		if (!(msg_list.head = m->next))
565+			msg_list.tail = NULL;
566+		pthread_mutex_unlock(&msg_list.mutex);
567+		switch (m->code) {
568+		case MSG_SOCKERR:
569+			close_multiplexing_out();
570+			/* FALL THROUGH */
571+		case MSG_INFO:
572+		case MSG_ERROR:
573+		case MSG_LOG:
574+			rwrite(m->code, m->buf, m->len);
575+			break;
576+		default:
577+			io_multiplex_write(m->code, m->buf, m->len);
578+			break;
579 		}
580+		free(m);
581 	}
582-	return 1;
583+	defer_forwarding_messages = 0;
584+	no_flush--;
585 }
586 
587 int send_msg(enum msgcode code, char *buf, int len)
588 {
589-	if (msg_fd_out < 0) {
590+	if (!am_receiver()) {
591 		if (!defer_forwarding_messages)
592 			return io_multiplex_write(code, buf, len);
593 		if (!io_multiplexing_out)
594 			return 0;
595-		msg_list_add(&msg2sndr, code, buf, len);
596-		return 1;
597 	}
598-	msg_list_add(&msg2genr, code, buf, len);
599-	msg2genr_flush(NORMAL_FLUSH);
600+	msg_list_add(code, buf, len);
601 	return 1;
602 }
603 
604-int get_redo_num(int itemizing, enum logcode code)
605+/* This is only used by the receiver. */
606+void push_redo_num(int ndx)
607 {
608-	while (1) {
609-		if (hlink_list.head)
610-			check_for_finished_hlinks(itemizing, code);
611-		if (redo_list.head)
612-			break;
613-		read_msg_fd();
614-	}
615+	assert(am_receiver());
616+	flist_ndx_push(&redo_list, ndx);
617+}
618 
619+/* This is only used by the generator. */
620+int get_redo_num(void)
621+{
622+	assert(am_generator());
623 	return flist_ndx_pop(&redo_list);
624 }
625 
626+/* This is only used by the receiver. */
627+void push_hlink_num(int ndx)
628+{
629+	assert(am_receiver());
630+	flist_ndx_push(&hlink_list, ndx);
631+}
632+
633+/* This is only used by the generator. */
634 int get_hlink_num(void)
635 {
636+	assert(am_generator());
637 	return flist_ndx_pop(&hlink_list);
638 }
639 
640@@ -480,11 +438,6 @@ static int read_timeout(int fd, char *bu
641 		FD_ZERO(&r_fds);
642 		FD_ZERO(&w_fds);
643 		FD_SET(fd, &r_fds);
644-		if (msg2genr.head) {
645-			FD_SET(msg_fd_out, &w_fds);
646-			if (msg_fd_out > maxfd)
647-				maxfd = msg_fd_out;
648-		}
649 		if (io_filesfrom_f_out >= 0) {
650 			int new_fd;
651 			if (io_filesfrom_buflen == 0) {
652@@ -517,9 +470,6 @@ static int read_timeout(int fd, char *bu
653 			continue;
654 		}
655 
656-		if (msg2genr.head && FD_ISSET(msg_fd_out, &w_fds))
657-			msg2genr_flush(NORMAL_FLUSH);
658-
659 		if (io_filesfrom_f_out >= 0) {
660 			if (io_filesfrom_buflen) {
661 				if (FD_ISSET(io_filesfrom_f_out, &w_fds)) {
662@@ -847,6 +797,8 @@ static void readfd(int fd, char *buffer,
663 	}
664 
665 	if (fd == write_batch_monitor_in) {
666+		if (am_generator())
667+		    rprintf(FINFO, "writing %d bytes to batch file from generator\n", total);
668 		if ((size_t)write(batch_fd, buffer, total) != total)
669 			exit_cleanup(RERR_FILEIO);
670 	}
671@@ -1115,7 +1067,6 @@ static void writefd_unbuffered(int fd,ch
672 			 * to grab any messages they sent before they died. */
673 			while (fd == sock_f_out && io_multiplexing_in) {
674 				set_io_timeout(30);
675-				ignore_timeout = 0;
676 				readfd_unbuffered(sock_f_in, io_filesfrom_buf,
677 						  sizeof io_filesfrom_buf);
678 			}
679@@ -1126,7 +1077,7 @@ static void writefd_unbuffered(int fd,ch
680 		defer_forwarding_messages = 1;
681 
682 		if (fd == sock_f_out) {
683-			if (io_timeout || am_generator)
684+			if (io_timeout || am_generator())
685 				last_io_out = time(NULL);
686 			sleep_for_bwlimit(cnt);
687 		}
688@@ -1136,23 +1087,6 @@ static void writefd_unbuffered(int fd,ch
689 	no_flush--;
690 }
691 
692-static void msg2sndr_flush(void)
693-{
694-	if (defer_forwarding_messages)
695-		return;
696-
697-	while (msg2sndr.head && io_multiplexing_out) {
698-		struct msg_list_item *m = msg2sndr.head;
699-		if (!(msg2sndr.head = m->next))
700-			msg2sndr.tail = NULL;
701-		stats.total_written += m->len;
702-		defer_forwarding_messages = 1;
703-		writefd_unbuffered(sock_f_out, m->buf, m->len);
704-		defer_forwarding_messages = 0;
705-		free(m);
706-	}
707-}
708-
709 /**
710  * Write an message to a multiplexed stream. If this fails then rsync
711  * exits.
712@@ -1178,14 +1112,15 @@ static void mplex_write(enum msgcode cod
713 		defer_forwarding_messages = 1;
714 		writefd_unbuffered(sock_f_out, buf, len);
715 		defer_forwarding_messages = 0;
716-		msg2sndr_flush();
717+		if (am_generator())
718+			msg_list_flush();
719 	}
720 }
721 
722-void io_flush(int flush_it_all)
723+void io_flush(UNUSED(int flush_it_all))
724 {
725-	msg2genr_flush(flush_it_all);
726-	msg2sndr_flush();
727+	if (am_generator())
728+		msg_list_flush();
729 
730 	if (!iobuf_out_cnt || no_flush)
731 		return;
732@@ -1199,11 +1134,6 @@ void io_flush(int flush_it_all)
733 
734 static void writefd(int fd,char *buf,size_t len)
735 {
736-	if (fd == msg_fd_out) {
737-		rprintf(FERROR, "Internal error: wrong write used in receiver.\n");
738-		exit_cleanup(RERR_PROTOCOL);
739-	}
740-
741 	if (fd == sock_f_out)
742 		stats.total_written += len;
743 
744@@ -1409,9 +1339,3 @@ void start_write_batch(int fd)
745 	else
746 		write_batch_monitor_in = fd;
747 }
748-
749-void stop_write_batch(void)
750-{
751-	write_batch_monitor_out = -1;
752-	write_batch_monitor_in = -1;
753-}
754--- old/log.c
755+++ new/log.c
756@@ -33,7 +33,6 @@ extern int am_sender;
757 extern int local_server;
758 extern int quiet;
759 extern int module_id;
760-extern int msg_fd_out;
761 extern int allow_8bit_chars;
762 extern int protocol_version;
763 extern int preserve_times;
764@@ -75,7 +74,6 @@ struct {
765 	{ RERR_IPC        , "error in IPC code" },
766 	{ RERR_CRASHED    , "sibling process crashed" },
767 	{ RERR_TERMINATED , "sibling process terminated abnormally" },
768-	{ RERR_SIGNAL1    , "received SIGUSR1" },
769 	{ RERR_SIGNAL     , "received SIGINT, SIGTERM, or SIGHUP" },
770 	{ RERR_WAITCHILD  , "waitpid() failed" },
771 	{ RERR_MALLOC     , "error allocating core memory buffers" },
772@@ -241,8 +239,8 @@ void rwrite(enum logcode code, char *buf
773 	if (len < 0)
774 		exit_cleanup(RERR_MESSAGEIO);
775 
776-	if (am_server && msg_fd_out >= 0) {
777-		/* Pass the message to our sibling. */
778+	if (am_receiver()) {
779+		/* Pass the message to the generator thread. */
780 		send_msg((enum msgcode)code, buf, len);
781 		return;
782 	}
783--- old/main.c
784+++ new/main.c
785@@ -32,7 +32,6 @@ extern int list_only;
786 extern int am_root;
787 extern int am_server;
788 extern int am_sender;
789-extern int am_generator;
790 extern int am_daemon;
791 extern int blocking_io;
792 extern int remove_source_files;
793@@ -96,9 +95,20 @@ struct pid_status {
794 
795 static time_t starttime, endtime;
796 static int64 total_read, total_written;
797+static pthread_t receiver_tid;
798 
799 static void show_malloc_stats(void);
800 
801+int am_generator()
802+{
803+	return receiver_tid != 0 && pthread_self() != receiver_tid;
804+}
805+
806+int am_receiver()
807+{
808+	return receiver_tid != 0 && pthread_self() == receiver_tid;
809+}
810+
811 /* Works like waitpid(), but if we already harvested the child pid in our
812  * remember_children(), we succeed instead of returning an error. */
813 pid_t wait_process(pid_t pid, int *status_ptr, int flags)
814@@ -175,7 +185,7 @@ static void handle_stats(int f)
815 		show_flist_stats();
816 	}
817 
818-	if (am_generator)
819+	if (am_generator())
820 		return;
821 
822 	if (am_daemon) {
823@@ -683,12 +693,30 @@ static void do_server_sender(int f_in, i
824 	exit_cleanup(0);
825 }
826 
827+struct thread_args {
828+    struct file_list *flist;
829+    char *local_name;
830+    int f_in;
831+};
832+
833+static void *start_receiver_thread(void *arg)
834+{
835+	static int exit_code;
836+	struct thread_args *ta = (struct thread_args *)arg;
837+
838+	recv_files(ta->f_in, ta->flist, ta->local_name);
839+	handle_stats(ta->f_in);
840+
841+	push_redo_num(-2);
842+
843+	exit_code = log_got_error ? RERR_PARTIAL : 0;
844+	return &exit_code;
845+}
846 
847 static int do_recv(int f_in,int f_out,struct file_list *flist,char *local_name)
848 {
849-	int pid;
850-	int exit_code = 0;
851-	int error_pipe[2];
852+	void *value_ptr;
853+	struct thread_args args;
854 
855 	/* The receiving side mustn't obey this, or an existing symlink that
856 	 * points to an identical file won't be replaced by the referent. */
857@@ -697,70 +725,16 @@ static int do_recv(int f_in,int f_out,st
858 	if (preserve_hard_links)
859 		init_hard_links();
860 
861-	if (fd_pair(error_pipe) < 0) {
862-		rsyserr(FERROR, errno, "pipe failed in do_recv");
863-		exit_cleanup(RERR_IPC);
864-	}
865-
866-	io_flush(NORMAL_FLUSH);
867-
868-	if ((pid = do_fork()) == -1) {
869-		rsyserr(FERROR, errno, "fork failed in do_recv");
870+	args.f_in = f_in;
871+	args.flist = flist;
872+	args.local_name = local_name;
873+	if (pthread_create(&receiver_tid, NULL, start_receiver_thread, &args) < 0) {
874+		rsyserr(FERROR, errno, "pthread_create failed in do_recv");
875 		exit_cleanup(RERR_IPC);
876 	}
877 
878-	if (pid == 0) {
879-		close(error_pipe[0]);
880-		if (f_in != f_out)
881-			close(f_out);
882-
883-		/* we can't let two processes write to the socket at one time */
884-		close_multiplexing_out();
885-
886-		/* set place to send errors */
887-		set_msg_fd_out(error_pipe[1]);
888-
889-		recv_files(f_in, flist, local_name);
890-		io_flush(FULL_FLUSH);
891-		handle_stats(f_in);
892-
893-		send_msg(MSG_DONE, "", 0);
894-		io_flush(FULL_FLUSH);
895-
896-		/* Handle any keep-alive packets from the post-processing work
897-		 * that the generator does. */
898-		if (protocol_version >= 29) {
899-			kluge_around_eof = -1;
900-
901-			/* This should only get stopped via a USR2 signal. */
902-			while (read_int(f_in) == flist->count
903-			    && read_shortint(f_in) == ITEM_IS_NEW) {}
904-
905-			rprintf(FERROR, "Invalid packet at end of run [%s]\n",
906-				who_am_i());
907-			exit_cleanup(RERR_PROTOCOL);
908-		}
909-
910-		/* Finally, we go to sleep until our parent kills us with a
911-		 * USR2 signal.  We sleep for a short time, as on some OSes
912-		 * a signal won't interrupt a sleep! */
913-		while (1)
914-			msleep(20);
915-	}
916-
917-	am_generator = 1;
918-	close_multiplexing_in();
919-	if (write_batch && !am_server)
920-		stop_write_batch();
921-
922-	close(error_pipe[1]);
923-	if (f_in != f_out)
924-		close(f_in);
925-
926 	io_start_buffering_out();
927 
928-	set_msg_fd_in(error_pipe[0]);
929-
930 	generate_files(f_out, flist, local_name);
931 
932 	handle_stats(-1);
933@@ -771,10 +745,13 @@ static int do_recv(int f_in,int f_out,st
934 	}
935 	io_flush(FULL_FLUSH);
936 
937-	set_msg_fd_in(-1);
938-	kill(pid, SIGUSR2);
939-	wait_process_with_flush(pid, &exit_code);
940-	return exit_code;
941+	pthread_join(receiver_tid, &value_ptr);
942+	if (!am_server)
943+		output_summary();
944+
945+	close_all();
946+
947+	return *(int*)value_ptr;
948 }
949 
950 
951@@ -1176,22 +1153,6 @@ static int start_client(int argc, char *
952 	return ret;
953 }
954 
955-
956-static RETSIGTYPE sigusr1_handler(UNUSED(int val))
957-{
958-	exit_cleanup(RERR_SIGNAL1);
959-}
960-
961-static RETSIGTYPE sigusr2_handler(UNUSED(int val))
962-{
963-	if (!am_server)
964-		output_summary();
965-	close_all();
966-	if (log_got_error)
967-		_exit(RERR_PARTIAL);
968-	_exit(0);
969-}
970-
971 RETSIGTYPE remember_children(UNUSED(int val))
972 {
973 #ifdef WNOHANG
974@@ -1283,8 +1244,6 @@ int main(int argc,char *argv[])
975 # endif
976 	sigact.sa_flags = SA_NOCLDSTOP;
977 #endif
978-	SIGACTMASK(SIGUSR1, sigusr1_handler);
979-	SIGACTMASK(SIGUSR2, sigusr2_handler);
980 	SIGACTMASK(SIGCHLD, remember_children);
981 #ifdef MAINTAINER_MODE
982 	SIGACTMASK(SIGSEGV, rsync_panic_handler);
983--- old/match.c
984+++ new/match.c
985@@ -23,7 +23,7 @@
986 #include "rsync.h"
987 
988 extern int verbose;
989-extern int do_progress;
990+extern int recv_progress;
991 extern int checksum_seed;
992 extern int append_mode;
993 
994@@ -113,7 +113,7 @@ static void matched(int f, struct sum_st
995 	else
996 		last_match = offset;
997 
998-	if (buf && do_progress)
999+	if (buf && recv_progress)
1000 		show_progress(last_match, buf->file_size);
1001 }
1002 
1003@@ -317,7 +317,7 @@ void match_sums(int f, struct sum_struct
1004 	if (append_mode) {
1005 		OFF_T j = 0;
1006 		for (j = CHUNK_SIZE; j < s->flength; j += CHUNK_SIZE) {
1007-			if (buf && do_progress)
1008+			if (buf && recv_progress)
1009 				show_progress(last_match, buf->file_size);
1010 			sum_update(map_ptr(buf, last_match, CHUNK_SIZE),
1011 				   CHUNK_SIZE);
1012@@ -325,7 +325,7 @@ void match_sums(int f, struct sum_struct
1013 		}
1014 		if (last_match < s->flength) {
1015 			int32 len = s->flength - last_match;
1016-			if (buf && do_progress)
1017+			if (buf && recv_progress)
1018 				show_progress(last_match, buf->file_size);
1019 			sum_update(map_ptr(buf, last_match, len), len);
1020 			last_match = s->flength;
1021--- old/options.c
1022+++ new/options.c
1023@@ -74,7 +74,6 @@ int def_compress_level = Z_DEFAULT_COMPR
1024 int am_root = 0;
1025 int am_server = 0;
1026 int am_sender = 0;
1027-int am_generator = 0;
1028 int am_starting_up = 1;
1029 int relative_paths = -1;
1030 int implied_dirs = 1;
1031@@ -95,6 +94,7 @@ int am_daemon = 0;
1032 int daemon_over_rsh = 0;
1033 int do_stats = 0;
1034 int do_progress = 0;
1035+int recv_progress = 0;
1036 int keep_partial = 0;
1037 int safe_symlinks = 0;
1038 int copy_unsafe_links = 0;
1039@@ -1306,6 +1306,7 @@ int parse_arguments(int *argc, const cha
1040 
1041 	if (do_progress && !verbose && !log_before_transfer && !am_server)
1042 		verbose = 1;
1043+	recv_progress = do_progress;
1044 
1045 	if (dry_run)
1046 		do_xfers = 0;
1047--- old/pipe.c
1048+++ new/pipe.c
1049@@ -59,7 +59,7 @@ pid_t piped_child(char **command, int *f
1050 		exit_cleanup(RERR_IPC);
1051 	}
1052 
1053-	pid = do_fork();
1054+	pid = fork();
1055 	if (pid == -1) {
1056 		rsyserr(FERROR, errno, "fork");
1057 		exit_cleanup(RERR_IPC);
1058@@ -123,7 +123,7 @@ pid_t local_child(int argc, char **argv,
1059 		exit_cleanup(RERR_IPC);
1060 	}
1061 
1062-	pid = do_fork();
1063+	pid = fork();
1064 	if (pid == -1) {
1065 		rsyserr(FERROR, errno, "fork");
1066 		exit_cleanup(RERR_IPC);
1067--- old/receiver.c
1068+++ new/receiver.c
1069@@ -25,7 +25,7 @@
1070 extern int verbose;
1071 extern int do_xfers;
1072 extern int am_server;
1073-extern int do_progress;
1074+extern int recv_progress;
1075 extern int log_before_transfer;
1076 extern int stdout_format_has_i;
1077 extern int logfile_format_has_i;
1078@@ -157,7 +157,7 @@ static int receive_data(int f_in, char *
1079 		if (sum.remainder)
1080 			sum.flength -= sum.blength - sum.remainder;
1081 		for (j = CHUNK_SIZE; j < sum.flength; j += CHUNK_SIZE) {
1082-			if (do_progress)
1083+			if (recv_progress)
1084 				show_progress(offset, total_size);
1085 			sum_update(map_ptr(mapbuf, offset, CHUNK_SIZE),
1086 				   CHUNK_SIZE);
1087@@ -165,7 +165,7 @@ static int receive_data(int f_in, char *
1088 		}
1089 		if (offset < sum.flength) {
1090 			int32 len = sum.flength - offset;
1091-			if (do_progress)
1092+			if (recv_progress)
1093 				show_progress(offset, total_size);
1094 			sum_update(map_ptr(mapbuf, offset, len), len);
1095 			offset = sum.flength;
1096@@ -178,7 +178,7 @@ static int receive_data(int f_in, char *
1097 	}
1098 
1099 	while ((i = recv_token(f_in, &data)) != 0) {
1100-		if (do_progress)
1101+		if (recv_progress)
1102 			show_progress(offset, total_size);
1103 
1104 		if (i > 0) {
1105@@ -248,7 +248,7 @@ static int receive_data(int f_in, char *
1106 		ftruncate(fd, offset);
1107 #endif
1108 
1109-	if (do_progress)
1110+	if (recv_progress)
1111 		end_progress(total_size);
1112 
1113 	if (fd != -1 && offset > 0 && sparse_end(fd) != 0) {
1114@@ -299,12 +299,12 @@ static void handle_delayed_updates(struc
1115 					"rename failed for %s (from %s)",
1116 					full_fname(fname), partialptr);
1117 			} else {
1118-				if (remove_source_files
1119-				    || (preserve_hard_links
1120-				     && file->link_u.links)) {
1121+				if (remove_source_files) {
1122 					SIVAL(numbuf, 0, i);
1123 					send_msg(MSG_SUCCESS,numbuf,4);
1124 				}
1125+				if (preserve_hard_links && file->link_u.links)
1126+					push_hlink_num(i);
1127 				handle_partial_dir(partialptr, PDIR_DELETE);
1128 			}
1129 		}
1130@@ -355,11 +355,6 @@ int recv_files(int f_in, struct file_lis
1131 	if (verbose > 2)
1132 		rprintf(FINFO,"recv_files(%d) starting\n",flist->count);
1133 
1134-	if (flist->hlink_pool) {
1135-		pool_destroy(flist->hlink_pool);
1136-		flist->hlink_pool = NULL;
1137-	}
1138-
1139 	if (delay_updates)
1140 		delayed_bits = bitbag_create(flist->count);
1141 
1142@@ -382,7 +377,7 @@ int recv_files(int f_in, struct file_lis
1143 				rprintf(FINFO, "recv_files phase=%d\n", phase);
1144 			if (phase == 2 && delay_updates)
1145 				handle_delayed_updates(flist, local_name);
1146-			send_msg(MSG_DONE, "", 0);
1147+			push_redo_num(-2);
1148 			if (keep_partial && !partial_dir)
1149 				make_backups = 0; /* prevents double backup */
1150 			if (append_mode) {
1151@@ -607,7 +602,7 @@ int recv_files(int f_in, struct file_lis
1152 		/* log the transfer */
1153 		if (log_before_transfer)
1154 			log_item(FCLIENT, file, &initial_stats, iflags, NULL);
1155-		else if (!am_server && verbose && do_progress)
1156+		else if (!am_server && verbose && recv_progress)
1157 			rprintf(FINFO, "%s\n", fname);
1158 
1159 		/* recv file data */
1160@@ -654,11 +649,13 @@ int recv_files(int f_in, struct file_lis
1161 		cleanup_disable();
1162 
1163 		if (recv_ok > 0) {
1164-			if (remove_source_files
1165-			    || (preserve_hard_links && file->link_u.links)) {
1166+			if (remove_source_files) {
1167+				decrement_active_files(i);
1168 				SIVAL(numbuf, 0, i);
1169 				send_msg(MSG_SUCCESS, numbuf, 4);
1170 			}
1171+			if (preserve_hard_links && file->link_u.links)
1172+				push_hlink_num(i);
1173 		} else if (!recv_ok) {
1174 			int msgtype = phase || read_batch ? FERROR : FINFO;
1175 			if (msgtype == FERROR || verbose) {
1176@@ -681,8 +678,8 @@ int recv_files(int f_in, struct file_lis
1177 					errstr, fname, keptstr, redostr);
1178 			}
1179 			if (!phase) {
1180-				SIVAL(numbuf, 0, i);
1181-				send_msg(MSG_REDO, numbuf, 4);
1182+				decrement_active_files(i);
1183+				push_redo_num(i);
1184 			}
1185 		}
1186 	}
1187--- old/rsync.c
1188+++ new/rsync.c
1189@@ -39,7 +39,6 @@ extern int omit_dir_times;
1190 extern int am_root;
1191 extern int am_server;
1192 extern int am_sender;
1193-extern int am_generator;
1194 extern int am_starting_up;
1195 extern int allow_8bit_chars;
1196 extern int preserve_uid;
1197@@ -305,5 +304,5 @@ const char *who_am_i(void)
1198 {
1199 	if (am_starting_up)
1200 		return am_server ? "server" : "client";
1201-	return am_sender ? "sender" : am_generator ? "generator" : "receiver";
1202+	return am_sender ? "sender" : am_generator() ? "generator" : "receiver";
1203 }
1204--- old/rsync.h
1205+++ new/rsync.h
1206@@ -169,10 +169,8 @@ enum msgcode {
1207 	MSG_DATA=0,	/* raw data on the multiplexed stream */
1208 	MSG_ERROR=FERROR, MSG_INFO=FINFO, /* remote logging */
1209 	MSG_LOG=FLOG, MSG_SOCKERR=FSOCKERR, /* sibling logging */
1210-	MSG_REDO=9,	/* reprocess indicated flist index */
1211 	MSG_SUCCESS=100,/* successfully updated indicated flist index */
1212 	MSG_DELETED=101,/* successfully deleted a file on receiving side */
1213-	MSG_DONE=86	/* current phase is done */
1214 };
1215 
1216 #include "errcode.h"
1217@@ -329,6 +327,7 @@ enum msgcode {
1218 #endif
1219 
1220 #include <assert.h>
1221+#include <pthread.h>
1222 
1223 #include "lib/pool_alloc.h"
1224 
1225--- old/util.c
1226+++ new/util.c
1227@@ -415,49 +415,6 @@ int robust_rename(char *from, char *to, 
1228 	return -1;
1229 }
1230 
1231-static pid_t all_pids[10];
1232-static int num_pids;
1233-
1234-/** Fork and record the pid of the child. **/
1235-pid_t do_fork(void)
1236-{
1237-	pid_t newpid = fork();
1238-
1239-	if (newpid != 0  &&  newpid != -1) {
1240-		all_pids[num_pids++] = newpid;
1241-	}
1242-	return newpid;
1243-}
1244-
1245-/**
1246- * Kill all children.
1247- *
1248- * @todo It would be kind of nice to make sure that they are actually
1249- * all our children before we kill them, because their pids may have
1250- * been recycled by some other process.  Perhaps when we wait for a
1251- * child, we should remove it from this array.  Alternatively we could
1252- * perhaps use process groups, but I think that would not work on
1253- * ancient Unix versions that don't support them.
1254- **/
1255-void kill_all(int sig)
1256-{
1257-	int i;
1258-
1259-	for (i = 0; i < num_pids; i++) {
1260-		/* Let's just be a little careful where we
1261-		 * point that gun, hey?  See kill(2) for the
1262-		 * magic caused by negative values. */
1263-		pid_t p = all_pids[i];
1264-
1265-		if (p == getpid())
1266-			continue;
1267-		if (p <= 0)
1268-			continue;
1269-
1270-		kill(p, sig);
1271-	}
1272-}
1273-
1274 /** Turn a user name into a uid */
1275 int name_to_uid(char *name, uid_t *uid)
1276 {
1277--- old/proto.h
1278+++ new/proto.h
1279@@ -101,11 +101,12 @@ void hard_link_cluster(struct file_struc
1280 void io_set_sock_fds(int f_in, int f_out);
1281 void set_io_timeout(int secs);
1282 void set_msg_fd_in(int fd);
1283-void set_msg_fd_out(int fd);
1284 void increment_active_files(int ndx, int itemizing, enum logcode code);
1285 void decrement_active_files(int ndx);
1286 int send_msg(enum msgcode code, char *buf, int len);
1287-int get_redo_num(int itemizing, enum logcode code);
1288+void push_redo_num(int ndx);
1289+int get_redo_num(void);
1290+void push_hlink_num(int ndx);
1291 int get_hlink_num(void);
1292 void io_set_filesfrom_fds(int f_in, int f_out);
1293 int read_filesfrom_line(int fd, char *fname);
1294@@ -123,7 +124,7 @@ uchar read_byte(int f);
1295 int read_vstring(int f, char *buf, int bufsize);
1296 void read_sum_head(int f, struct sum_struct *sum);
1297 void write_sum_head(int f, struct sum_struct *sum);
1298-void io_flush(int flush_it_all);
1299+void io_flush(UNUSED(int flush_it_all));
1300 void write_shortint(int f, int x);
1301 void write_int(int f,int32 x);
1302 void write_longint(int f, int64 x);
1303@@ -139,7 +140,6 @@ int io_multiplex_write(enum msgcode code
1304 void close_multiplexing_in(void);
1305 void close_multiplexing_out(void);
1306 void start_write_batch(int fd);
1307-void stop_write_batch(void);
1308 char *lp_bind_address(void);
1309 char *lp_motd_file(void);
1310 char *lp_pid_file(void);
1311@@ -198,6 +198,8 @@ void maybe_log_item(struct file_struct *
1312 		    char *buf);
1313 void log_delete(char *fname, int mode);
1314 void log_exit(int code, const char *file, int line);
1315+int am_generator();
1316+int am_receiver();
1317 pid_t wait_process(pid_t pid, int *status_ptr, int flags);
1318 int child_main(int argc, char *argv[]);
1319 void start_server(int f_in, int f_out, int argc, char *argv[]);
1320@@ -286,8 +288,6 @@ int copy_file(const char *source, const 
1321 int robust_unlink(const char *fname);
1322 int robust_rename(char *from, char *to, char *partialptr,
1323 		  int mode);
1324-pid_t do_fork(void);
1325-void kill_all(int sig);
1326 int name_to_uid(char *name, uid_t *uid);
1327 int name_to_gid(char *name, gid_t *gid);
1328 int lock_range(int fd, int offset, int len);
1329