期望腳本變量賦值

Question

#!/usr/bin/expect 
set NUM [exec some command to ssh to a remote machine and return a number] 
puts $NUM 
while { $NUM != "0" } { 
     set NUM [exec some command to ssh to a remote machine and return a number] 
     sleep 5 
} 

以上是我的代碼。它運行在期望腳本中。我想將變量NUM分配給某個ssh到遠程機器的命令並返回一個數字（當我輸入終端時，該命令將返回一個數字）。 我得到了錯誤：

100 
while executing 
"exec some command to ssh to a remote machine and return a number "qstat | wc -l"" 
invoked from within 
"set JOBS [exec some command to ssh to a remote machine and return a number "qstat | wc -l"]" 

的事情是，我已經拿到了號碼，但我沒有這個數字賦給變量NUM

誰能幫我調試這一塊？謝謝

Answer 1

Yon不能這樣做，因爲它是一個期望腳本，最好的方法是將期望腳本包裝在bash腳本中。請參閱Run expect command inside while loop in shell script