我正在尝试自动化交互式 ssh 调用(见注 1),如下所示:
SSHBINARY = '/usr/bin/ssh'
ASKPASS = '/home/mz0/checkHost/askpass.py'
def sshcmd(host,port,user,password,cmd):
env0 = {'SSH_ASKPASS': ASKPASS, 'DISPLAY':':9999'}
ssh = subprocess.Popen([SSHBINARY,"-T","-p %d" % port,
"-oStrictHostKeyChecking=no", "-oUserKnownHostsFile=/dev/null",
"%s@%s" % (user,host), cmd],
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
env=env0,
preexec_fn=os.setsid
)
error = ssh.stderr.readlines()
result = ssh.stdout.readlines()
return error,result
host = 'localhost'
port = 22
user = 'try1'
password = '1try' # unused, hardcoded in ASKPASS
cmd = 'ls'
result1, error1 = sshcmd(host,port,user,password,cmd)
if result1 : print "OUT: %s" % result1
if error1 : print "ERR: %s" % error1
自从我得到这个后,我正在做一些愚蠢的事情:
OUT: ["Warning: Permanently added 'localhost' (RSA) to the list of known hosts.\r\n"]
ERR: ['['Desktop\n', ..., 'Videos\n']']
显然 stdout 和 stderr 被交换了(注 2)。你能指出我的错误吗?
注意 1:我很清楚无密码 ssh、忽略主机密钥等的危险,以及对自动化交互式 ssh 的厌恶请求。
注意 2:在 shell 中运行相同的命令确认 stdout 和 stderr 在我的代码中被交换
ssh -o 'UserKnownHostsFile /dev/null' -o 'StrictHostKeyChecking no' \
try1@localhost ls > ssh-out 2> ssh-error