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我有一个疑问。我想将命令的结果存储在字符串变量中。谁能告诉我代码中的错误是什么？它不工作。我用过expect_out(buffer)，但它不起作用。

#!/usr/bin/expect
package require Expect
set Argu1 [lindex $argv 0]
set Argu2 [lindex $argv 1]

if {$argc == 2} {

    if {[regexp {^(\d|[1-9]\d|1\d\d|2[0-4]\d|[2][5][0-5])\.(\d|[1-9]\d|1\d\d|2[
        0-4]\d|[2][5][0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|[2][5][0-5])\.(\d|[1-9]
        \d|1\d\d|2[0-4]\d|[2][5][0-5])$} $Argu1 match ]} {
        puts "VALID IP-ADDRESS"
        set timeout $Argu2-1
        spawn ping $Argu1
        expect "Expect"
        set string $expect_out(buffer)
        puts $string
        puts "SUCCESS"
        exit 
    } else { 
        puts "INVALID IP-ADDRESS"
    } 
} else { 
    puts "YOU HAVE TO GIVE TWO ARGUMENTS\n FIRST ARGUMENT SHOULD BE 
    IP-ADDRESS \n SECOND ARGUMENT SHOULD BE THE NUMBER OF PACKETS
    YOU WANT TO SEND"
}
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1 回答 1

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我不愿意回答你的问题，因为你还没有回答我对另一个问题的回答。但是，鉴于没有其他人回应，我会尽力帮助您。

我认为您不需要在这里使用$expect_out(buffer)。假设 ping 返回“0% loss”或“0% packet loss”表示 ping 成功，您可以尝试以下操作（未经测试）。显然，您可以将“0%”更改为您想要表示成功的任何内容。

#!/usr/bin/expect
package require Expect
set Argu1 [lindex $argv 0]
set Argu2 [lindex $argv 1]

if {$argc == 2} {

    if {[regexp {^(\d|[1-9]\d|1\d\d|2[0-4]\d|[2][5][0-5])\.(\d|[1-9]\d|1\d\d|2[
        0-4]\d|[2][5][0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|[2][5][0-5])\.(\d|[1-9]
        \d|1\d\d|2[0-4]\d|[2][5][0-5])$} $Argu1 match ]} {
        puts "VALID IP-ADDRESS"
        set timeout $Argu2-1
        spawn ping $Argu1
        expect {
          "0%" {puts "The IP address was successfully pinged"}
          "default" {puts "Could not ping this IP address"}
        }
        exit 
    } else { 
        puts "INVALID IP-ADDRESS"
    } 
} else { 
    puts "YOU HAVE TO GIVE TWO ARGUMENTS\n FIRST ARGUMENT SHOULD BE 
    IP-ADDRESS \n SECOND ARGUMENT SHOULD BE THE NUMBER OF PACKETS
    YOU WANT TO SEND"
}

我建议“0%”的原因如下。如果您从 Windows 机器上成功执行 ping，您将看到如下内容（注意“0% 丢失”）：

C:\Documents and Settings\Brian>ping 192.168.1.1

Pinging 192.168.1.1 with 32 bytes of data:

Reply from 192.168.1.1: bytes=32 time=1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64
Reply from 192.168.1.1: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.1.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum = 1ms, Average = 0ms

在 Unix 机器上，它可能看起来像这样（注意“0% 丢包”）：

[brian@rex 4]$ ping -c 1 192.168.1.87
PING 192.168.1.87 (192.168.1.87) 56(84) bytes of data.
64 bytes from 192.168.1.87: icmp_seq=0 ttl=64 time=42.1 ms

--- 192.168.1.87 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 42.153/42.153/42.153/0.000 ms, pipe 2

您可以选择许多 ping 成功的指标，我选择了数据包丢失率为 0%（成功的明确指标）这一事实。该expect命令搜索 ping 的结果，如果找到“0%”，则输出“IP 地址已成功 ping”。

于 2012-05-23T11:44:16.627 回答