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Why /tmp/1 has nothing after I echo something to it in expect?

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# 1  
Old 11-20-2013
Why /tmp/1 has nothing after I echo something to it in expect?
Code:
lyang001@lyang001-OptiPlex-9010:~/updates/$ cat zz.sh 
#!/usr/bin/expect
set flag 8888
puts "xxx $flag"
send "echo $flag > /tmp/1\r"

Code:
lyang001@lyang001-OptiPlex-9010:~/updates/$ ./zz.sh 
xxx 8888
lyang001@lyang001-OptiPlex-9010:~/updates/$ cat /tmp/1 
lyang001@lyang001-OptiPlex-9010:~/updates/$ 

get nothing

# 2  
Old 11-20-2013
Not sure if I'm seeing the entire scope of what you're trying to accomplish, but it works if you use the exec function instead of send:

Code:
exec echo $flag > /tmp/1

cat /tmp/1
8888

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