当读取循环破坏Bash时，sshpass

Question

我正在尝试创建一个循环，用于存储列表中每个主机的ssh命令的输出。

守则：

#!/bin/bash

while read i; do
        ip=$(echo "$i" | awk -F "\"*,\"*" '{print $2}') #(file contains name,ip values)

        if echo "$i" | grep -q "ARISTA"; then
                results=$(sshpass -f/root/cred ssh user@$ip "show running-config")
                echo "$results"
        elif echo "$i" | grep -q "NEXUS"; then
                results=$(sshpass -f/root/cred ssh user@$ip "show running-config")
                echo "$results"
        elif echo "$i" | grep -q "ARUBA"; then
                results=$(sshpass -f/root/cred ssh user@$ip "show running-config")
                echo "$results"
        elif echo "$i" | grep -q "R1"; then
                results=$(sshpass -f/root/cred ssh user@$ip "show configuration | display set")
                echo "$results"
        elif echo "$i" | grep -q "HP"; then
                results=$(sshpass -f/root/cred ssh user@$ip "display current-configuration")
                echo "$results"
        else
                echo "$i not found"
        fi
done </root/hosts.txt

我得到的输出是列表中的第一个主机的结果-- only。我怀疑问题是sshpass，因为当我尝试一个不同的语句时，我得到了准确的结果，比如：

#!/bin/bash

while read i; do
        ip=$(echo "$i" | awk -F "\"*,\"*" '{print $2}') #(file contains name,ip values)

        if echo "$i" | grep -q "ARISTA"; then
                echo "$ip = Arista"
        elif echo "$i" | grep -q "NEXUS"; then
                echo "$ip = Nexus"
        elif echo "$i" | grep -q "ARUBA"; then
                echo "$ip = Aruba"
        elif echo "$i" | grep -q "R1"; then
                echo "$ip = R1"
        elif echo "$i" | grep -q "HP"; then
                echo "$ip = HP"
        else
                echo "$i not found"
        fi
done </root/hosts.txt

然而，在执行第一个sshpass命令之后，循环就中断了。

有什么想法吗？

Answer 1

好吧那么。

这就是解决办法：

#!/bin/bash

while read i; do
        ip=$(echo "$i" | awk -F "\"*,\"*" '{print $2}') #(file contains name,ip values)

        if echo "$i" | grep -q "ARISTA"; then
                results=$(sshpass -f/root/cred ssh -n user@$ip "show running-config")
                echo "$results"
        elif echo "$i" | grep -q "NEXUS"; then
                results=$(sshpass -f/root/cred ssh -n user@$ip "show running-config")
                echo "$results"
        elif echo "$i" | grep -q "ARUBA"; then
                results=$(sshpass -f/root/cred ssh -n user@$ip "show running-config")
                echo "$results"
        elif echo "$i" | grep -q "R1"; then
                results=$(sshpass -f/root/cred ssh -n user@$ip "show configuration | display set")
                echo "$results"
        elif echo "$i" | grep -q "HP"; then
                results=$(sshpass -f/root/cred ssh -n user@$ip "display current-configuration")
                echo "$results"
        else
                echo "$i not found"
        fi
done </root/hosts.txt

是Jetchisel建议的，ssh正在吃STDIN。因此，解决方案是在ssh命令中添加标志-n，该命令将输出传递给/dev/null.

。

非常感谢的伙计们，祝你们好运。