Mac "expect" function cannot work properly with ftp "!" command

Question

Lastly I have written a Expect-TCL script on Linux to automatically download log files from my company network device I have ever made used of ftp command “!” to go back to linux local to create directory with appropriate name for storing downloaded files.
However, I found that when I use the same Expect-TCL script on my Mac, I found that the Expect script will stuck at ftp “!” command without proceeding onward. Here below is the command output with my sample experiment.
BMBP:_Practise boyce$ expect sample-ftp.exp
spawn ftp 127.0.0.1 21
Connected to 127.0.0.1.
220-Welcome to Boyce BMP FTP
220 CrushFTP Server Ready!
Name (127.0.0.1:boyce): boyce
331 Username OK. Need password.
Password:
230 Password OK. Connected.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> binary
200 Command ok : Binary type selected.
ftp> verbose
Verbose mode off.
ftp> !
bash-3.2$
quit
exit
^CBMBP:_Practise boyce$
Here below is my sample script to test ftp “!” command:
BMBP:_Practise boyce$ cat sample-ftp.exp
#! /usr/bin/expect
Default Settings
set site "127.0.0.1"
set port "21"
set dirListFile "dir_list.txt"
set sdUserName "boyce"
set sdUserPwd "boyce"
Launch a FTP session to SD
set timeout 60
log_user 0
spawn ftp $site $port
expect "Name" {send "$sdUserName\r"}
expect "Password:" {send "$sdUserPwd\r"}
expect "ftp>" {send "binary\r"}
expect "ftp>" {send "verbose\r"}
expect "ftp>" {send "!\r"}
expect "(.*)" {send "ls\r"}
exit
Have you ever tried “!” command from expect script? Should it be classified as a bug on Mac Expect and do you know is there any patch available to fix such problem?

Answer 1

Try posting this in the Unix Forums.