Add third_party/pexpect

third_party/pexpect/examples/passmass.py

Index: third_party/pexpect/examples/passmass.py
diff --git a/third_party/pexpect/examples/passmass.py b/third_party/pexpect/examples/passmass.py
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+++ b/third_party/pexpect/examples/passmass.py
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+#!/usr/bin/env python
+
+'''Change passwords on the named machines. passmass host1 host2 host3 . . .
+Note that login shell prompt on remote machine must end in # or $.
+
+PEXPECT LICENSE
+
+    This license is approved by the OSI and FSF as GPL-compatible.
+        http://opensource.org/licenses/isc-license.txt
+
+    Copyright (c) 2012, Noah Spurrier <noah@noah.org>
+    PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
+    PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
+    COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+'''
+
+from __future__ import print_function
+
+from __future__ import absolute_import
+
+import pexpect
+import sys, getpass
+
+
+try:
+    raw_input
+except NameError:
+    raw_input = input
+
+
+USAGE = '''passmass host1 host2 host3 . . .'''
+COMMAND_PROMPT = '[$#] '
+TERMINAL_PROMPT = r'Terminal type\?'
+TERMINAL_TYPE = 'vt100'
+SSH_NEWKEY = r'Are you sure you want to continue connecting \(yes/no\)\?'
+
+def login(host, user, password):
+
+    child = pexpect.spawn('ssh -l %s %s'%(user, host))
+    fout = file ("LOG.TXT","wb")
+    child.setlog (fout)
+
+    i = child.expect([pexpect.TIMEOUT, SSH_NEWKEY, '[Pp]assword: '])
+    if i == 0: # Timeout
+        print('ERROR!')
+        print('SSH could not login. Here is what SSH said:')
+        print(child.before, child.after)
+        sys.exit (1)
+    if i == 1: # SSH does not have the public key. Just accept it.
+        child.sendline ('yes')
+        child.expect ('[Pp]assword: ')
+    child.sendline(password)
+    # Now we are either at the command prompt or
+    # the login process is asking for our terminal type.
+    i = child.expect (['Permission denied', TERMINAL_PROMPT, COMMAND_PROMPT])
+    if i == 0:
+        print('Permission denied on host:', host)
+        sys.exit (1)
+    if i == 1:
+        child.sendline (TERMINAL_TYPE)
+        child.expect (COMMAND_PROMPT)
+    return child
+
+# (current) UNIX password:
+def change_password(child, user, oldpassword, newpassword):
+
+    child.sendline('passwd')
+    i = child.expect(['[Oo]ld [Pp]assword', '.current.*password', '[Nn]ew [Pp]assword'])
+    # Root does not require old password, so it gets to bypass the next step.
+    if i == 0 or i == 1:
+        child.sendline(oldpassword)
+        child.expect('[Nn]ew [Pp]assword')
+    child.sendline(newpassword)
+    i = child.expect(['[Nn]ew [Pp]assword', '[Rr]etype', '[Rr]e-enter'])
+    if i == 0:
+        print('Host did not like new password. Here is what it said...')
+        print(child.before)
+        child.send (chr(3)) # Ctrl-C
+        child.sendline('') # This should tell remote passwd command to quit.
+        return
+    child.sendline(newpassword)
+
+def main():
+
+    if len(sys.argv) <= 1:
+        print(USAGE)
+        return 1
+
+    user = raw_input('Username: ')
+    password = getpass.getpass('Current Password: ')
+    newpassword = getpass.getpass('New Password: ')
+    newpasswordconfirm = getpass.getpass('Confirm New Password: ')
+    if newpassword != newpasswordconfirm:
+        print('New Passwords do not match.')
+        return 1
+
+    for host in sys.argv[1:]:
+        child = login(host, user, password)
+        if child == None:
+            print('Could not login to host:', host)
+            continue
+        print('Changing password on host:', host)
+        change_password(child, user, password, newpassword)
+        child.expect(COMMAND_PROMPT)
+        child.sendline('exit')
+
+if __name__ == '__main__':
+    main()