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期望命令包含多个命令

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期望命令包含多个命令

由于我的远程服务器 [authorized_keys...] 有问题，我在本地计算机上编写了一个脚本，该脚本使用expect命令 ssh 进入服务器，然后执行cd，然后git pull

但我无法让这件事发挥作用：

#!/usr/bin/expect
spawn ssh USER@IP_ADDRESS   
expect {
    "USER@IP_ADDRESS's password:"  {
        send "PASSWORD\r"
    }
    "[USER@server ~]$" {
        send "cd public_html"
    }
}   
interact

我需要转义一些字符吗？即使我尝试它仍然忽略该cd命令。

答案1

[对于 TCL 来说是特殊的，因此需要适当的处理，通过"\[quotes]"或用大括号替换引号{[quotes]}。一个更完整的例子看起来像

#!/usr/bin/env expect

set prompt {\[USER@HOST[[:blank:]]+[^\]]+\]\$ }
spawn ssh USER@HOST

expect_before {
    # TODO possibly with logging, or via `log_file` (see expect(1))
    timeout { exit 1 }
    eof { exit 1 }
}

# connect
expect {
    # if get a prompt then public key auth probably logged us in
    # so drop out of this block
    -re $prompt {}
    -ex "password:" {
        send -- "Hunter2\r"
        expect -re $prompt
    }
    # TODO handle other cases like fingerprint mismatch here...
}

# assuming the above got us to a prompt...
send -- "cd FIXMESOMEDIR\r"

expect {
    # TWEAK error message may vary depending on shell (try
    # both a not-exist dir and a chmod 000 dir)
    -ex " cd: " { exit 1 }
    -re $prompt {}
}

# assuming the above got us to a prompt and that the cd was
# properly checked for errors...
send -- "echo git pull FIXMEREMOVEDEBUGECHO\r"

expect -re $prompt
interact

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