expect接受鍵盤輸入的腳本問題

vcuteym

腳本如下：

#!/usr/bin/expect
spawn command
expect "number1"
send "-20\r"
expect "number2"
send "20\r"
expect "number3"
send "20\r"
interact

問題：

因?yàn)閏ommand執(zhí)行后，需要從鍵盤接收多個參數(shù)，每個參數(shù)輸入后都要敲回車，所以不能用管道（至少我不會）。

然后我用expect，當(dāng)屏幕顯示“number1” 時，需要鍵盤輸入一個數(shù)值。如果鍵盤輸入的數(shù)值是正數(shù)，比如“20”，腳本正常運(yùn)行，沒問題。但是如果這個數(shù)值是復(fù)數(shù)，比如send "-20\r"，這個是時候就會提示錯誤，錯誤提示內(nèi)容如下：

": must be -i, -h, -s, -null, -0, -raw, -break, or --
    while executing
"send "-20\r""

求解答呀！

jason680

回復(fù) 1# vcuteym

send "-20\r"

change to

send -- "-20\r"
   

http://www.tcl.tk/man/expect5.31/expect.1.html
...
send [-flags] string
Sends string to the current process.For example, the command
    send "hello world\r"
...
The -- flag forces the next argument to be interpreted as a string rather than a flag. Any string can be preceded by "--" whether or not it actually lookslike a flag.  This provides a reliable mechanism to specify variable stringswithout being tripped up by those that accidentally look like flags.(All strings starting with "-" are reserved for future options.)

vcuteym

回復(fù) 2# jason680


    真是高手中的高手呀！