pexpect - 通过ssh运行script.sh

Question

我在编程上通过ssh运行本地脚本时遇到了问题。
我不确定这是否是本地主机上的shell变量替换问题。

手动运行时，

ssh [email protected] 'bash -s' < /u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin/cpu.sh 

我得到预期的输出，

CPU pctUser pctNice pctSystem pctIowait pctIdle
全部11.21 0.00 1.50 0.31 86.98
0 0.00 0.00 0.00 0.00 100.00
1 3.00 0.00 1.00 0.00 96.00 ....

，但我得到

bash下运行下面的代码时没有这样的文件或目录

：/u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin/cpu.sh ，

splunk_bin_dir = '/u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin' 
hostname = 'server1' 
username = 'monit' 
password = 'monit#_' 


command = "/usr/bin/ssh %(username)[email protected]%(hostname)s 'bash -s' < %(splunk_bin_dir)s/cpu.sh" % locals() 
print command 

ssh_new_conn = 'Are you sure you want to continue connecting' 

p = pexpect.spawn(command, timeout=360) 
# Handles the 3 possible connection outcomes: 
# a) Ssh to the remote host for the first time, triggering 'Are you sure you want to continue connecting' 
# b) ask you for password 
# c) No password is needed at all, because you already have the key. 
i = p.expect([ssh_new_conn,'[pP]assword:',pexpect.EOF]) 
print ' Initial pexpect command output: ', i 
if i == 0: 
    # send 'yes' 
    p.sendline('yes') 
    i = p.expect(['[pP]assword:',pexpect.EOF]) 
    print 'sent yes. pexpect command output', i 
    if i == 0: 
     # send the password 
     p.sendline(password) 
     p.expect(pexpect.EOF) 
elif i == 1: 
    # send the password 
    p.sendline(password) 
    p.expect(pexpect.EOF) 
elif i == 2: 
    print "pexpect faced key or connection timeout" 
    pass 

print p.before 

这些印刷输出，

的/ usr/bin中/ SSH monit的@ server1的 'bash的-s' < /u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin/cpu.sh
初始Pexpect的命令输出：1
bash中：/ U02/Splunk的/ Splunk的在/ etc /应用/ Splunk_TA_nix /斌/ cpu.sh：没有这样的文件或目录

Pexpect的颠簸到[PP] assword线，所以我猜密码正确传递，

Answer 1

这里从Pexpect的手动注：

请记住，Pexpect不会解释shell元字符，例如 重定向，管道或通配符（>，|或*）。这是一个常见的错误。 如果你想运行一个命令，并通过另一个命令管道，然后 你还必须启动一个shell。

这是工作线

command = """/bin/bash -c "/usr/bin/ssh %(username)[email protected]%(hostname)s 'bash -s' < %(splunk_bin_dir)s/cpu.sh" """ % locals()