在脚本中需要sudo时使用期望输入密码 [英] use expect to enter password when need sudo in script
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问题描述
我正在使用Ubuntu 14.04并安装了Expect.我正在尝试编写一个脚本,以在出现提示时输入密码.
更新的代码:
I am using Ubuntu 14.04 and installed expect. I am trying to write a script to enter password when it prompted.
UPDATED Code:
#!/usr/bin/expect -d
set timeout 20
set pw odroid
spawn sudo apt-get update
expect {\[sudo]\ password for odroid: }
send "$pw\r"
close
有什么建议吗?
更新错误:
expect: does "" (spawn_id exp4) match glob pattern "\[sudo]\ password for odroid: "? no
[sudo] password for odroid:
expect: does "[sudo] password for odroid: " (spawn_id exp4) match glob pattern "\[sudo]\ password for odroid: "? yes
expect: set expect_out(0,string) "[sudo] password for odroid: "
expect: set expect_out(spawn_id) "exp4"
expect: set expect_out(buffer) "[sudo] password for odroid: "
send: sending "odroid\r" to { exp4 }
推荐答案
引号过多.选择以下选项之一:
You have too many quotes. Choose one of:
expect {\[sudo\] password for odroid: }
expect "\\\[sudo\\\] password for odroid: "
显然,第一种选择更好.
Clearly the first option is better.
许多转义是必要的,因为1)方括号在glob模式中是特殊的,并且2)方括号在双引号中是特殊的Tcl语法(命令替换),但在花括号中没有.
Lots of escaping is necessary because 1) square brackets are special in a glob pattern, and 2) square brackets are special Tcl syntax (command substitution) in double quotes but not in curly braces.
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