diff -ur v10/sock_ut.py v11/sock_ut.py
--- v10/sock_ut.py	2021-07-19 00:10:50.000000000 +0900
+++ v11/sock_ut.py	2021-07-25 11:38:44.000000000 +0900
@@ -280,13 +280,15 @@
 
 	return empty.new( locals() )
 
-def srv_loop_cmd( host, port, name, cmd ):
+def srv_loop_cmd( host, port, name, cmd, mode ):
 
 	def th_func( sc ):
 		proc = fio_ut.proc_new( cmd )
 
 		def cb( b ):
 			fio_ut.p_b( proc.fo, b )
+			if mode == 'all':
+				fio_ut.close( proc.fo )
 			return fio_ut.g_b_all( proc.fi )
 
 		srv_func = srv_func_new( cb, use_b=True, use_all=True )
@@ -348,15 +350,51 @@
 		'srv [ host=localhost ][ port=13579 ] upper',
 		'srv [ host=localhost ][ port=13579 ] eval',
 		'srv [ host=localhost ][ port=13579 ] srv_name cmd arg ...',
+		'srv -a [ host=localhost ][ port=13579 ] srv_name cmd arg ... ( all mode )',
 		'cli [ host=localhost ][ port=13579 ] upper word word word ...',
 		'cli [ host=localhost ][ port=13579 ] eval word word word ...',
 		'cli [ host=localhost ][ port=13579 ] srv_name',
+		'cli -a [ host=localhost ][ port=13579 ] srv_name ( all mode )',
 		'srvs [ host=localhost ][ port=13579 ]',
 		'kill_base [ host=localhost ][ port=13579 ]',
 		'kill [ host=localhost ][ port=13579 ] srv_name ( srv_name is upper, eval or ... )'
 	]
 	dbg.help_exit( '\n'.join( lst ) )
 
+def run_cli( sc, mode ):
+	( fi, fo ) = fio_ut.set_fs_sys_stdio()
+
+	def cnv_out( b ):
+		if not fio_ut.p_b( sc, b ):
+			return False
+
+		b = fio_ut.g_b_all( sc )
+		if not b:
+			return False
+
+		if not fio_ut.p_b( fo, b ):
+			return False
+
+		return True
+
+	if mode == 'all':
+		buf = b''
+		while True:
+			b = fio_ut.g_b_all( fi )
+			if not b:
+				break
+			buf += b
+		cnv_out( buf )
+		return
+
+	# mode == 'line'
+	while True:
+		b = fio_ut.g_b_line( fi )
+		if not b:
+			break
+		if not cnv_out( b ):
+			break
+
 def run():
 	if len( sys.argv ) < 2:
 		help()
@@ -374,6 +412,12 @@
 				return argv.pop( i )[ len( k ) : ]
 		return dv
 
+	def pop_mode():
+		if argv[ 0 ] == '-a':
+			pop()
+			return 'all'
+		return 'line'
+
 	host = popk( 'host=', 'localhost' )
 	port = int( popk( 'port=', '13579' ) )
 
@@ -386,6 +430,7 @@
 	if cmd == 'base':
 		base_srv( port )
 	elif cmd == 'srv':
+		mode = pop_mode()
 		name = pop()
 		if name in names:
 			cb = names.get( name )
@@ -393,8 +438,9 @@
 			srv_loop( port, name, srv_func.func, host )
 		else:
 			cmd = ' '.join( argv )
-			srv_loop_cmd( host, port, name, cmd )
+			srv_loop_cmd( host, port, name, cmd, mode )
 	elif cmd == 'cli':
+		mode = pop_mode()
 		lst = get_srvs( host, port )
 		name = pop()
 		if name not in lst:
@@ -414,21 +460,7 @@
 					break
 				dbg.out( '{} --> {}'.format( w, r ) )
 		else:
-			( fi, fo ) = fio_ut.set_fs_sys_stdio()
-			while True:
-				b = fio_ut.g_b_line( fi )
-				if not b:
-					break
-
-				if not fio_ut.p_b( sc, b ):
-					break
-
-				b = fio_ut.g_b_all( sc )
-				if not b:
-					break
-
-				if not fio_ut.p_b( fo, b ):
-					break
+			run_cli( sc, mode )
 		close( sc )
 
 	elif cmd == 'srvs':