通过使用Expect来配置mgre的奇怪错误:无效命令名"0“

Question

我使用一个shell脚本将expect脚本嵌入到远程服务器上，以配置dmvpn(ipsec+mgre+nhrp)，我还使用temlate作为每个协议的配置。我的文件结构如下：

• dmvpn.sh
• ipsec_sec.cli ( ipsec.secrets)
• ipsec_cnf.cli模板文件)( ipsec.conf)
• mgre.cli模板文件(mgre模板文件)
• nrhp.cli(nhrp模板文件)

dmvpn.sh:我使用以下代码导入模板文件

source ./dmvpn/ipsec_sec.cli
source ./dmvpn/ipsec_cnf.cli
source ./dmvpn/mgre.cli
source ./dmvpn/nhrp.cli

以及用于绘制模板的下列代码：

sec_cmd=`eval $sec`
cnf_cmd=`eval $cnf`
mgre_cmd=`eval $mgre`
nhrp_cmd=`eval $nh`

mgre.cli：

mgre='
if [ "$remote_ip" == "0.0.0.0" ]; then
   echo "ip tunnel add $if_name mode gre local $local_ip key $key ttl $ttl";
else
   echo "ip tunnel add $if_name mode gre local $local_ip remote $remote_ip key $key ttl $ttl";
fi;
echo "ip addr add $ip_mask dev $if_name";
echo "ip link set dev $if_name up";
echo "uci set network.$if_name=interface";
echo "uci set network.$if_name.ifname=$if_name";
echo "uci set network.$if_name.proto=static";
echo "uci set network.$if_name.ipaddr=$wip";
echo "uci set network.$if_name.netmask=$msk";
echo "uci commit network";
echo "/etc/init.d/network restart";
'

在dmvpn.sh中期望脚本：

   expect "#"
   send "cat > /etc/ipsec.secrets << EOF
$sec_cmd
EOF\r"
   expect "#"
   send "sed -i \\"/conn ${ipsec_name}/,/ type/d\\" /etc/ipsec.conf \r"
   expect "#"
   send "cat >> /etc/ipsec.conf << EOF
$cnf_cmd
EOF\r"
   expect "#"
   send "ipsec reload\r"
   expect "#"
   send "$mgre_cmd\r"
   expect "#"
   send "$nhrp_cmd\r"

每个模板文件都是以相同的方式设计的，但是在执行$mgre_cmd时，我收到了以下错误：

root@OpenWrt:~# invalid command name "0"
    while executing
"0"
    invoked from within
"send "ip tunnel add gre1 mode gre local 10.25.110.1 key 123 ttl 255
ip addr add 2.2.12.1/24 dev gre1
ip link set dev gre1 up
uci set network.gre1=inte..."

$nhrp_cmd，$sec_cmd，$cnf_cmd没有发生这样的错误，我不知道为什么。nhrp.cli如下：

nhrp='
echo "vtysh \r
conf \r
int $if_name \r
ip nhrp network-id $network_id";
if [ "$nhs_wan_ip" == "0.0.0.0" ]; then
   echo "ip nhrp nhs dynamic nbma $nhs_ip";
else
   echo "ip nhrp nhs $nhs_wan_ip nbma $nhs_ip";
fi;
if $shortcut; then
   echo "ip nhrp shortcut";
fi;
if $redirect; then
   echo "ip nhrp redirect";
fi;
echo "tunnel source $tunnel_source \r
end \r
write \r
exit ";
'

完整的expect脚本如下：

/usr/bin/expect<<-EOF
log_file dmvpn/${host}_add_dmvpn.log
    spawn ssh -p $port $user@$host
    expect {
    -re "Are you sure you want to continue connecting (yes/no)?" {
        send "yes\r"
        }
    "*password:" {
        send "${loginpass}\r"
        }
    -re "Permission denied, please try again." {
        exit
        }
   }

   expect "#"
   send "cat > /etc/ipsec.secrets << EOF
$sec_cmd
EOF\r"
   expect "#"
   send "sed -i \\"/conn ${ipsec_name}/,/ type/d\\" /etc/ipsec.conf \r"
   expect "#"
   send "cat >> /etc/ipsec.conf << EOF
$cnf_cmd
EOF\r"
   expect "#"
   send "ipsec reload\r"
   expect "#"
   send "$mgre_cmd\r"
   expect "#"
   send "$nhrp_cmd\r"
   expect "#"
   send "exit\r"
expect eof
EOF

echo $mgre_cmd的结果

ip tunnel add gre1 mode gre local 10.25.110.1 key 123 ttl 255 ip addr add 2.2.12.1/24 dev gre1 ip link set dev gre1 up uci set network.gre1=interface uci set network.gre1.ifname=gre1 uci set network.gre1.proto=static uci set network.gre1.ipaddr=2.2.12.1 uci set network.gre1.netmask=255.255.255.0 uci commit network /etc/init.d/network restart

当我使用/usr/bin/expect -d <<-EOF时，我得到了以下内容：(只执行$mgre_cmd)

spawn ssh -p 22 root@10.25.110.1
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {15176}
Gate keeper glob pattern for 'Are you sure you want to continue connecting (yes/no)?' is 'Are you sure you want to continue connecting *'. Activating booster.
Gate keeper glob pattern for 'Permission denied, please try again.' is 'Permission denied, please try again?'. Activating booster.

expect: does "" (spawn_id exp7) match regular expression "Are you sure you want to continue connecting (yes/no)?"? Gate "Are you sure you want to continue connecting *"? gate=no
"*password:"? no
"Permission denied, please try again."? Gate "Permission denied, please try again?"? gate=no
root@10.25.110.1's password: 
expect: does "root@10.25.110.1's password: " (spawn_id exp7) match regular expression "Are you sure you want to continue connecting (yes/no)?"? Gate "Are you sure you want to continue connecting *"? gate=no
"*password:"? yes
expect: set expect_out(0,string) "root@10.25.110.1's password:"
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) "root@10.25.110.1's password:"
send: sending "zzs\r" to { exp7 }

expect: does " " (spawn_id exp7) match glob pattern "#"? no


expect: does " \r\n" (spawn_id exp7) match glob pattern "#"? no
  _______                     ________        __
 |       |.-----.-----.-----.|  |  |  |.----.|  |_
 |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
 |_______||   __|_____|__|__||________||__|  |____|
          |__| W I R E L E S S   F R E E D O M
 -----------------------------------------------------
 uCPE 1.0.0, r11063-85e04e9f46
 -----------------------------------------------------

expect: does " \r\n  _______                     ________        __\r\n |       |.-----.-----.-----.|  |  |  |.----.|  |_\r\n |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|\r\n |_______||   __|_____|__|__||________||__|  |____|\r\n          |__| W I R E L E S S   F R E E D O M\r\n -----------------------------------------------------\r\n uCPE 1.0.0, r11063-85e04e9f46\r\n -----------------------------------------------------\r\n" (spawn_id exp7) match glob pattern "#"? no
]0;root@OpenWrt: ~root@OpenWrt:~# 
expect: does " \r\n  _______                     ________        __\r\n |       |.-----.-----.-----.|  |  |  |.----.|  |_\r\n |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|\r\n |_______||   __|_____|__|__||________||__|  |____|\r\n          |__| W I R E L E S S   F R E E D O M\r\n -----------------------------------------------------\r\n uCPE 1.0.0, r11063-85e04e9f46\r\n -----------------------------------------------------\r\n\u001b]0;root@OpenWrt: ~\u0007root@OpenWrt:~# " (spawn_id exp7) match glob pattern "#"? yes
expect: set expect_out(0,string) "#"
expect: set expect_out(spawn_id) "exp7"
expect: set expect_out(buffer) " \r\n  _______                     ________        __\r\n |       |.-----.-----.-----.|  |  |  |.----.|  |_\r\n |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|\r\n |_______||   __|_____|__|__||________||__|  |____|\r\n          |__| W I R E L E S S   F R E E D O M\r\n -----------------------------------------------------\r\n uCPE 1.0.0, r11063-85e04e9f46\r\n -----------------------------------------------------\r\n\u001b]0;root@OpenWrt: ~\u0007root@OpenWrt:~#"
invalid command name "0"
    while executing
"0"
    invoked from within
"send "ip tunnel add gre1 mode gre local 10.25.110.1 key 123 ttl 255\r
ip addr add 2.2.12.1/24 dev gre1 \r ip link set dev gre1 up \r uci set network.g..."

Answer 1

终于，我做到了！尽管我仍然不知道mgre.cli和其他clis之间有什么区别。我将这个命令send "$mgre_cmd \r"改为send -- {$mgre_cmd}和send -- \r，我注意到在执行shell脚本中的expect命令或tcl命令时，我们有时需要使用转义字符来修复这些命令。我们可以使用send -- {}来翻译整个命令的含义。