[英]expect command is not passing env variable in ubuntu focal
I'm using expect
(v5.45.4-2build1) to automate generation of client certs using easy-rsa in ubuntu focal.我正在使用
expect
(v5.45.4-2build1) 在 ubuntu 焦点中使用 easy-rsa 自动生成客户端证书。 As per easy-rsa, to customize cert validity we need to pass EASYRSA_CERT_EXPIRE
variable.根据 easy-rsa,要自定义证书有效性,我们需要传递
EASYRSA_CERT_EXPIRE
变量。 But for some reason, my expect script is not able to fetch this variable.但由于某种原因,我的期望脚本无法获取此变量。 Here's the code for script.exp:
这是 script.exp 的代码:
#!/usr/bin/expect -f
set timeout -1
#exp_internal 1
set MY_PASSPHRASE [lindex $argv 0];
set USERNAME [lindex $argv 1];
set ttl [lindex $argv 2];
send "export EASYRSA_CERT_EXPIRE=$ttl\r"
spawn /bin/bash
set MSG "Executing script.exp for $USERNAME and $ttl";
send "echo 'INFO $MSG'>> /var/log/app/my_app.log\r"
send "cd /etc/openvpn/easy-rsa\r"
send "export EASYRSA_CERT_EXPIRE=$ttl\r"
send "./easyrsa gen-req $USERNAME\r"
expect "*Enter PEM pass phrase:"
send -- "$MY_PASSPHRASE\r"
expect "*Verifying - Enter PEM pass phrase:"
send -- "$MY_PASSPHRASE\r"
expect "*Common Name *$USERNAME*"
send -- "\r"
expect "*Keypair and certificate request completed*"
send -- "\r"
exit 0
Strangely, this works fine if i run the script via expect script.exp
.奇怪的是,如果我通过
expect script.exp
运行脚本,这可以正常工作。 But I want to use this in my perl script and it is not working from the perl script.但我想在我的 perl 脚本中使用它,它在 perl 脚本中不起作用。
This is how I'm calling my expect script:这就是我调用期望脚本的方式:
my $cmd_out_csr = system("expect script.exp $my_passphrase $username $ttl");
Just running, expect script.exp $my_passphrase $username $ttl
from cmd works fine.刚刚运行,
expect script.exp $my_passphrase $username $ttl
工作正常。 Any help is appreciated.任何帮助表示赞赏。 Thanks.
谢谢。
use the perl system
command with a list of arguments:使用带有 arguments 列表的 perl
system
命令:
system('expect', 'script.exp', $my_passphrase, $username, $ttl);
when creating the variable in the remote shell, send quotes around the value:在远程 shell 中创建变量时,在值周围发送引号:
send "export EASYRSA_CERT_EXPIRE=\"$ttl\"\r"
These two things will protect the value of $ttl
if it contains whitespace.如果
$ttl
包含空格,这两件事将保护它的值。
Another thought: expect (via Tcl) can cd
and set environment variables.另一个想法:expect(通过 Tcl)可以
cd
和设置环境变量。 Instead of spawning a bash shell, spawn easyrsa directly:不要产生 bash shell,而是直接产生easyrsa:
#!/usr/bin/expect -f
set timeout -1
#exp_internal 1
lassign $argv MY_PASSPHRASE USERNAME ttl
set f [open /var/log/app/my_app.log a]
puts $f "INFO Executing [info script] for $USERNAME and $ttl"
close $f
cd /etc/openvpn/easy-rsa
set env(EASYRSA_CERT_EXPIRE) $ttl
spawn ./easyrsa gen-req $USERNAME
expect "*Enter PEM pass phrase:"
send -- "$MY_PASSPHRASE\r"
expect "*Verifying - Enter PEM pass phrase:"
send -- "$MY_PASSPHRASE\r"
expect "*Common Name *$USERNAME*"
send -- "\r"
expect "*Keypair and certificate request completed*"
send -- "\r"
expect eof
puts "Done."
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