expect redirect outputs giberish - bash

Question

I have backup.sh
#!/bin/bash
expect backup.exp
and backup.exp
#!/usr/bin/expect -f
#exp_internal 1
#log_user 0
set timeout 29
puts "----------------- [exec date +%Y.%m.%d\ %H:%M:%S] ------ exp start -----"
spawn -noecho ssh andrej#10.11.22.17
expect {
timeout { send_user "\n--- failed to get expected string---\n"; exit 1 }
eof { send_user "\nSSH failure\n"; exit 1 }
" andrej $ "
}
send "sudo bash\r"
send "ls -lh\r"
send exit\r
send exit\r
interact
puts "----------------- [exec date +%Y.%m.%d\ %H:%M:%S] ------ exp ende ------"
when I run
bash backup.sh >> backup.templog 2>&1
I get
----------------- 2015.09.02 18:48:29 ------ exp start -----
Last login: Wed Sep 2 18:48:24 2015 from 10.11.22.16
^[]0;andrej#centos7c:~/andrej^G^[[?1034h^[[01;32mandrej#centos7c ^[[01;34m18:48 andrej $ ^[[00msudo bash
^[]0;root#centos7c:/home/andrej/andrej^G^[[?1034h^[[01;31mroot#centos7c ^[[01;34m18:48 andrej $ ^[[00mls -lh
total 16K
-rw-rw-r--. 1 andrej andrej 13K Jun 30 19:04 iptables.sh
drwxrwxr-x. 2 andrej andrej 6 Jun 17 22:46 ^[[0m^[[01;34mmount^[[0m
^[]0;root#centos7c:/home/andrej/andrej^G^[[01;31mroot#centos7c ^[[01;34m18:48 andrej $ ^[[00mexit
exit
^[]0;andrej#centos7c:~/andrej^G^[[01;32mandrej#centos7c ^[[01;34m18:48 andrej $ ^[[00mexit
logout
Connection to 10.11.22.17 closed.
----------------- 2015.09.02 18:48:39 ------ exp ende ------
but when I do
bash backup.sh
, I get nice output that I need :
----------------- 2015.09.02 18:52:09 ------ exp start -----
Last login: Wed Sep 2 18:48:39 2015 from 10.11.22.16
andrej#centos7c 18:52 andrej $ sudo bash
root#centos7c 18:52 andrej $ ls -lh
total 16K
-rw-rw-r--. 1 andrej andrej 13K Jun 30 19:04 iptables.sh
drwxrwxr-x. 2 andrej andrej 6 Jun 17 22:46 mount
root#centos7c 18:52 andrej $ exit
exit
andrej#centos7c 18:52 andrej $ exit
logout
Connection to 10.11.22.17 closed.
----------------- 2015.09.02 18:52:20 ------ exp ende ------
How can I get rid of extra giberish when outputing to the log file when executing the script? I am using centos 7.1 in both server and client.
If you have any sugesstion please help me out. Thank you very much.

Answer 1

rewriting a but to address a couple of issues:
expect has 2 built-in methods to get the current datetime: timestamp (expect-specific) and clock (from Tcl)
I turn off output (log_user 0)
when it's important, I change the prompt and use an anchored regular expression to match it
I only output the results of the ls -lh command, which I suspect is your goal.
#!/usr/bin/expect -f
#exp_internal 1
set timeout 29
proc separator {msg} {
puts [format "----------------- %s ------ %s -----" [timestamp -format "%Y.%m.%d %T"] $msg]
}
separator "exp start"
log_user 0
spawn -noecho ssh andrej#10.11.22.17
expect {
timeout { send_user "\n--- failed to get expected string---\n"; exit 1 }
eof { send_user "\nSSH failure\n"; exit 1 }
" $ "
}
send "sudo bash\r"
expect " $ "
send "PS1='$'\r"
expect -re {\$$}
send "ls -lh\r"
expect -re {(.+)\r\n\$$}
puts $expect_out(1,string)
send "exit\r"
expect " $ "
send "exit\r"
expect eof
separator "exp ende"