diff -ur v20/site_ut.py v21/site_ut.py
--- v20/site_ut.py	2020-04-26 00:30:19.000000000 +0900
+++ v21/site_ut.py	2020-04-29 15:51:28.000000000 +0900
@@ -146,7 +146,7 @@
 
 	cmd = 'wget -q {}/{}'.format( url, path )
 	if dir_:
-		cmd = '( cd {} ; {} )'.format( dir_ )
+		cmd = '( cd {} ; {} )'.format( dir_, cmd )
 	if call( cmd, 'err' ) != 'err':
 		return True
 
@@ -165,29 +165,64 @@
 	if s:
 		dbg.out( s, '' )
 
+def do_cmd(site, cmds):
+	st = site.get() # default
+
+	cmd = arg.get_name_args( cmds )
+
+
+	def put_(path):
+		put( st.url, path, st.lmt_size )
+
+	def get_(path):
+		dbg.out('url={} path={} curr={}'.format( st.url, path, os.getcwd() ) )
+		if not get( st.url, path ):
+			sys.exit( 1 )
+
+	def exists(path):
+		s = '{}/{}'.format( st.url, path )
+		r = exists_url( s )
+		h = 'found' if r else 'not found'
+		dbg.out( h + ' ' + s )
+		if not r:
+			sys.exit( 1 )
+
+	def cat_(path):
+		cat( st.url, path )
+
+	fs = empty.new( put=put_, get=get_, exists=exists, cat=cat_ )
+
+
+	bak = os.getcwd()
+	C = cmd.opts.get( 'C' )
+	if C:
+		os.chdir( C )
+
+	if hasattr( fs, cmd.name ):
+		func = getattr( fs, cmd.name )
+		func( *cmd.args )
+
+	if C:
+		os.chdir( bak )
+
 if __name__ == "__main__":
 	site = new( 'ftp_ut.yaml' )
-	cmds = ( 'put', 'get', 'exists', 'cat' )
+
+	cmd_new = arg.cmd_new
+	s = '"-C dir" is load yaml and ( cd dir ; ... )'
+	cmds = [
+		cmd_new( 'put', [ 'path' ], opts={ 'C': '' }, comment=s ),
+		cmd_new( 'get', [ 'path' ], opts={ 'C': '' }, comment=s ),
+		cmd_new( 'exists', [ 'path' ], opts={ 'C': '' }, comment=s ),
+		cmd_new( 'cat', [ 'path' ], opts={ 'C': '' }, comment=s ),
+	]
+
+	names = list( map( lambda cmd: cmd.name, cmds ) )
+
 	a = arg.new()
 	k = a.pop()
-	if k in cmds:
-		st = site.get() # default
-		path = a.pop()
-		if path:
-			if k == 'put':
-				put( st.url, path, st.lmt_size )
-			elif k == 'get':
-				if not get( st.url, path ):
-					sys.exit( 1 )
-			elif k == 'exists':
-				s = '{}/{}'.format( st.url, path )
-				r = exists_url( s )
-				h = 'found' if r else 'not found'
-				dbg.out( h + ' ' + s )
-				if not r:
-					sys.exit( 1 )
-			elif k == 'cat':
-				cat( st.url, path )
+	if k in names:
+		do_cmd( site, cmds )
 	else:
 		st = site.get( k )
 		if st: