我正在尝试将tcl缓冲区导出到bash变量

Question

我正在尝试将tcl缓冲区导出到bash变量，但我无法使其正常工作。

我希望下面的例子能使我清楚我要完成的工作。

我一定要一个tcl嵌入脚本

======================================
#!/bin/bash
var=bash_to_tcl

expect -c "

puts lindex $argv 0

expect "xx"
send "123\n"

set $var $expect_out(buffer) <<<< setting the variable to export to bash>>>>>>

}
exit 0

<<< >> =====================================

echo $var "tcl_to_bash"    (THIS IS WHERE I AM HAVING ISSUES) <<<<<<<<<<<<<<<<<<<
=====================================

我一直在寻找示例的线索，但找不到任何线索。 我得到了尊重，但无法将输出导出回bash

Answer 1

子进程（期望）不能更改父进程（bash）的环境。 通常，信息通过stdio通道在进程之间传递：

#!/bin/bash

# this is how bash captures the output of the expect program
var=$(expect -c '
    spawn ...
    expect "xx"
    send "123\n"
    # here is expect sending the info back to the parent
    puts $expect_out(buffer)  
')
do something with "$var"