- switched on multiplexing for all connections, not just daemon

connections (this fixes the stderr/stdout problem). Upped
  protocol version for backward compat
- use multiplexing on error fd
- upped minimal protocol version
- got rid of some ugly code in the write buffering

clientserver.c

@@ -101,7 +101,7 @@ int start_socket_client(char *host, char *path, int argc, char *argv[])
 	}
 	io_printf(fd,"\n");
 
-	if (remote_version >= 22 || (remote_version > 17 && !am_sender))
+	if (remote_version == 22 || (remote_version > 17 && !am_sender))
 		io_start_multiplex_in(fd);
 
 	return client_run(fd, fd, -1, argc, argv);
@@ -316,7 +316,7 @@ static int rsync_module(int fd, int i)
 	argp = argv + optind;
 	optind = 0;
 
-	if (remote_version >= 22 || (remote_version > 17 && am_sender))
+	if (remote_version == 22 || (remote_version > 17 && am_sender))
 		io_start_multiplex_out(fd);
 
 	if (read_only) {

io.c

@@ -40,6 +40,8 @@ extern struct stats stats;
 static int buffer_f_in = -1;
 static int io_error_fd = -1;
 
+static void read_loop(int fd, char *buf, int len);
+
 void setup_readbuffer(int f_in)
 {
 	buffer_f_in = f_in;
@@ -71,17 +73,29 @@ void io_set_error_fd(int fd)
 	io_error_fd = fd;
 }
 
-/* read some data from the error fd and write it to FERROR */
+/* read some data from the error fd and write it to the write log code */
 static void read_error_fd(void)
 {
 	char buf[200];
 	int n;
 	int fd = io_error_fd;
+	int tag, len;
+
 	io_error_fd = -1;
 
-	n = read(fd, buf, sizeof(buf)-1);
-	if (n > 0) {
-		rwrite(FERROR, buf, n);
+	read_loop(fd, buf, 4);
+	tag = IVAL(buf, 0);
+
+	len = tag & 0xFFFFFF;
+	tag = tag >> 24;
+	tag -= MPLEX_BASE;
+
+	while (len) {
+		n = len;
+		if (n > (sizeof(buf)-1)) n = sizeof(buf)-1;
+		read_loop(fd, buf, n);
+		rwrite((enum logcode)tag, buf, n);
+		len -= n;
 	}
 
 	io_error_fd = fd;
@@ -181,7 +195,6 @@ static void read_loop(int fd, char *buf, int len)
 static int read_unbuffered(int fd, char *buf, int len)
 {
 	static int remaining;
-	char ibuf[4];
 	int tag, ret=0;
 	char line[1024];
 
@@ -197,8 +210,8 @@ static int read_unbuffered(int fd, char *buf, int len)
 			continue;
 		}
 
-		read_loop(fd, ibuf, 4);
-		tag = IVAL(ibuf, 0);
+		read_loop(fd, line, 4);
+		tag = IVAL(line, 0);
 
 		remaining = tag & 0xFFFFFF;
 		tag = tag >> 24;
@@ -221,7 +234,7 @@ static int read_unbuffered(int fd, char *buf, int len)
 		read_loop(fd, line, remaining);
 		line[remaining] = 0;
 
-		rprintf(tag,"%s", line);
+		rprintf((enum logcode)tag,"%s", line);
 		remaining = 0;
 	}
 
@@ -382,22 +395,41 @@ void io_start_buffering(int fd)
 {
 	if (io_buffer) return;
 	multiplex_out_fd = fd;
-	io_buffer = (char *)malloc(IO_BUFFER_SIZE+4);
+	io_buffer = (char *)malloc(IO_BUFFER_SIZE);
 	if (!io_buffer) out_of_memory("writefd");
 	io_buffer_count = 0;
-
-	/* leave room for the multiplex header in case it's needed */
-	io_buffer += 4;
 }
 
+/* write an message to a multiplexed stream. If this fails then rsync
+   exits */
+static void mplex_write(int fd, enum logcode code, char *buf, int len)
+{
+	char buffer[4096];
+	int n = len;
+
+	SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len);
+
+	if (n > (sizeof(buf)-4)) {
+		n = sizeof(buf)-4;
+	}
+
+	memcpy(&buffer[4], buf, n);
+	writefd_unbuffered(fd, buffer, n+4);
+
+	len -= n;
+	buf += n;
+
+	writefd_unbuffered(fd, buf, len);
+}
+
+
 void io_flush(void)
 {
 	int fd = multiplex_out_fd;
 	if (!io_buffer_count || no_flush) return;
 
 	if (io_multiplexing_out) {
-		SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count);
-		writefd_unbuffered(fd, io_buffer-4, io_buffer_count+4);
+		mplex_write(fd, 0, io_buffer, io_buffer_count);
 	} else {
 		writefd_unbuffered(fd, io_buffer, io_buffer_count);
 	}
@@ -408,7 +440,7 @@ void io_end_buffering(int fd)
 {
 	io_flush();
 	if (!io_multiplexing_out) {
-		free(io_buffer-4);
+		free(io_buffer);
 		io_buffer = NULL;
 	}
 }
@@ -539,26 +571,21 @@ void io_start_multiplex_in(int fd)
 }
 
 /* write an message to the multiplexed error stream */
-int io_multiplex_write(int f, char *buf, int len)
+int io_multiplex_write(enum logcode code, char *buf, int len)
 {
 	if (!io_multiplexing_out) return 0;
 
 	io_flush();
-
-	SIVAL(io_buffer-4, 0, ((MPLEX_BASE + f)<<24) + len);
-	memcpy(io_buffer, buf, len);
-
 	stats.total_written += (len+4);
-
-	writefd_unbuffered(multiplex_out_fd, io_buffer-4, len+4);
+	mplex_write(multiplex_out_fd, code, buf, len);
 	return 1;
 }
 
 /* write a message to the special error fd */
-int io_error_write(int f, char *buf, int len)
+int io_error_write(int f, enum logcode code, char *buf, int len)
 {
 	if (f == -1) return 0;
-	writefd_unbuffered(f, buf, len);
+	mplex_write(f, code, buf, len);
 	return 1;
 }
 

log.c

@@ -87,37 +87,37 @@ void set_error_fd(int fd)
 
 /* this is the underlying (unformatted) rsync debugging function. Call
    it with FINFO, FERROR or FLOG */
-void rwrite(int fd, char *buf, int len)
+void rwrite(enum logcode code, char *buf, int len)
 {
 	FILE *f=NULL;
 	extern int am_daemon;
 	extern int quiet;
 	/* recursion can happen with certain fatal conditions */
 
-	if (quiet != 0 && fd == FINFO) return;
+	if (quiet != 0 && code == FINFO) return;
 
 	if (len < 0) exit_cleanup(RERR_MESSAGEIO);
 
 	buf[len] = 0;
 
-	if (fd == FLOG) {
+	if (code == FLOG) {
 		if (am_daemon) logit(LOG_INFO, buf);
 		return;
 	}
 
+	if (io_error_write(log_error_fd, code, buf, strlen(buf))) return;
+
 	if (am_daemon) {
 		static int depth;
 		int priority = LOG_INFO;
-		if (fd == FERROR) priority = LOG_WARNING;
+		if (code == FERROR) priority = LOG_WARNING;
 
 		if (depth) return;
 
 		depth++;
 
 		log_open();
-
-		if (!io_error_write(log_error_fd, buf, strlen(buf)) &&
-		    !io_multiplex_write(fd, buf, strlen(buf))) {
+		if (!io_multiplex_write(code, buf, strlen(buf))) {
 			logit(priority, buf);
 		}
 
@@ -125,11 +125,11 @@ void rwrite(int fd, char *buf, int len)
 		return;
 	}
 
-	if (fd == FERROR) {
+	if (code == FERROR) {
 		f = stderr;
 	} 
 
-	if (fd == FINFO) {
+	if (code == FINFO) {
 		extern int am_server;
 		if (am_server) 
 			f = stderr;
@@ -146,7 +146,7 @@ void rwrite(int fd, char *buf, int len)
 		
 
 /* this is the rsync debugging function. Call it with FINFO, FERROR or FLOG */
- void rprintf(int fd, const char *format, ...)
+ void rprintf(enum logcode code, const char *format, ...)
 {
 	va_list ap;  
 	char buf[1024];
@@ -158,10 +158,10 @@ void rwrite(int fd, char *buf, int len)
 
 	if (len > sizeof(buf)-1) exit_cleanup(RERR_MESSAGEIO);
 
-	rwrite(fd, buf, len);
+	rwrite(code, buf, len);
 }
 
-void rflush(int fd)
+void rflush(enum logcode code)
 {
 	FILE *f = NULL;
 	extern int am_daemon;
@@ -170,15 +170,15 @@ void rflush(int fd)
 		return;
 	}
 
-	if (fd == FLOG) {
+	if (code == FLOG) {
 		return;
 	} 
 
-	if (fd == FERROR) {
+	if (code == FERROR) {
 		f = stderr;
 	} 
 
-	if (fd == FINFO) {
+	if (code == FINFO) {
 		extern int am_server;
 		if (am_server) 
 			f = stderr;

main.c

@@ -391,6 +391,10 @@ void start_server(int f_in, int f_out, int argc, char *argv[])
 {
 	extern int cvs_exclude;
 	extern int am_sender;
+	extern int remote_version;
+
+	if (remote_version >= 23)
+		io_start_multiplex_out(f_out);
 
 	setup_protocol(f_out, f_in);
 
@@ -412,6 +416,10 @@ int client_run(int f_in, int f_out, int pid, int argc, char *argv[])
 	char *local_name = NULL;
 	extern int am_sender;
 	extern int list_only;
+	extern int remote_version;
+
+	if (remote_version >= 23)
+		io_start_multiplex_in(f_in);
 
 	setup_protocol(f_out,f_in);
 	

rsync.h

@@ -47,8 +47,8 @@
 #define SAME_TIME (1<<7)
 
 /* update this if you make incompatible changes */
-#define PROTOCOL_VERSION 22
-#define MIN_PROTOCOL_VERSION 11
+#define PROTOCOL_VERSION 23
+#define MIN_PROTOCOL_VERSION 15
 #define MAX_PROTOCOL_VERSION 30
 
 #define RSYNC_PORT 873
@@ -62,9 +62,8 @@
 #define MAX_ARGS 1000
 
 #define MPLEX_BASE 7
-#define FERROR 1
-#define FINFO 2
-#define FLOG 3
+
+enum logcode {FERROR=1, FINFO=2, FLOG=3};
 
 #include "errcode.h"
 
@@ -477,7 +476,7 @@ extern int errno;
 #define NS(s) ((s)?(s):"<NULL>")
 
 /* use magic gcc attributes to catch format errors */
- void rprintf(int , const char *, ...)
+ void rprintf(enum logcode , const char *, ...)
 #ifdef __GNUC__
      __attribute__ ((format (printf, 2, 3)))
 #endif

test.sh

@@ -160,7 +160,7 @@ fi
 rm -rf ${TO}
 mkdir -p ${FROM}2/dir/subdir
 cp -a ${FROM}/dir/subdir/subsubdir ${FROM}2/dir/subdir
-cp ${FROM}/dir/* ${FROM}2/dir 2>/dev/null
+cp -a ${FROM}/dir/* ${FROM}2/dir 2>/dev/null
 runtest "excludes" 'checkit "rsync -vv -Hlrt --delete --include /dir/ --include /dir/\* --include /dir/\*/subsubdir  --include /dir/\*/subsubdir/\*\* --exclude \*\* ${FROM}/dir ${TO}" ${FROM}2/ ${TO}'
 rm -r ${FROM}2