A couple of caveats I discovered so far:
- make sure you specify correctly the text you expect back; even an extra space can be costly, and make your script wait forever; you can add '.*' to the beginning or to the end of the text you're expecting to make sure you're catching unexpected characters
- if you want to print the output from the other side of the connection, use child.before (where child is the process spawned by pexpect)
def show_virtual(child, virtual):
child.sendline ('show server virtual %s' % virtual)
def show_real(child, real):
child.sendline ('show server real %s' % real)
virtuals = ['www.mysite.com']
reals = ['web01', 'web02']
child = pexpect.spawn ('ssh myadmin@myloadbalancer')
child.expect ('.* password:')
for virtual in virtuals:
for real in reals:
i used pexpect to get remote machine mac address from the ifconfig command, it was working fine from the terminal i.e the command prompt but when i used that function through cgi it was giving me a Pexpect Exception which is as follows.
(256, \'Traceback (most recent call last):\\n File "/usr/local/https/suid/dossh.py", line 77, in module\\n main()\\n File "/usr/local/https/suid/dossh.py", line 51, in main\\n pssh.login(host,user,passwd)\\n File "/usr/lib/python2.5/site-packages/pxssh.py", line 54, in login\\n spawn.__init__(self, cmd, timeout=login_timeout)\\n File "/usr/lib/python2.5/site-packages/pexpect.py", line 375, in __init__\\n self.__spawn()\\n File "/usr/lib/python2.5/site-packages/pexpect.py", line 446, in __spawn\\n raise ExceptionPexpect(\\\'Error! pty.fork() failed: \\\' + str(e))\\npexpect.ExceptionPexpect: Error! pty.fork() failed: out of pty devices\')')
can u tell me what is the problem.........
do reply to me at this email id if possible......
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