expect接受键盘输入的脚本问题

vcuteym

脚本如下：

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

问题：

因为command执行后，需要从键盘接收多个参数，每个参数输入后都要敲回车，所以不能用管道（至少我不会）。

然后我用expect，当屏幕显示“number1” 时，需要键盘输入一个数值。如果键盘输入的数值是正数，比如“20”，脚本正常运行，没问题。但是如果这个数值是复数，比如send "-20\r"，这个是时候就会提示错误，错误提示内容如下：

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

求解答呀！

jason680

回复 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

回复 2# jason680


    真是高手中的高手呀！