Add imapquota post.

diff --git a/posts/imapquota.mdwn b/posts/imapquota.mdwn
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+[[imapquota.py]] is a [[Python]] script that checks the space
+remaining in an [IMAP][] mail account using [imaplib][].
+
+    $ imapquota -s imap.mail.drexel.edu xyz12@drexel.edu
+    Password:
+    Used 92693 of 102400 KB
+    90.5 percent
+
+[IMAP]: http://en.wikipedia.org/wiki/Internet_Message_Access_Protocol
+[imaplib]: http://docs.python.org/library/imaplib.html
+
+[[!tag tags/bash]]
+[[!tag tags/programming]]

diff --git a/posts/imapquota/imapquota.py b/posts/imapquota/imapquota.py
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+#!/usr/bin/python
+#
+# This script is released to the public domain.
+# Example usage:
+# $ imapquota.py -s imap.mail.drexel.edu xyz12@drexel.edu
+# Password:
+# Used 92693 of 102400 KB
+# 90.5 percent
+
+import getpass
+import imaplib
+import re
+
+
+def parse_server(server, ssl=False):
+    server_bits = server.split(':')
+    assert len(server_bits) in [1,2], 'invalid server: %s' % server_bits
+    server = server_bits[0]
+    if len(server_bits) == 2:
+        port = server_bits[1]
+    elif ssl == True:
+        port = 993
+    else:
+        port = 143
+    return (server, port)
+
+def get_quota(imap_connection):
+    status,value = imap_connection.getquotaroot('inbox')
+    #status,value = ('OK', [['inbox user/xyz12'], ['user/xyz12 (STORAGE 80000 102400)']])
+    quota = value[1][0]
+    regexp = re.compile(r'.*STORAGE ([0-9]*) ([0-9]*).*')
+    m = regexp.match(quota)
+    used,avail = [int(x) for x in m.groups()]
+    return (used, avail)
+
+
+if __name__ == '__main__':
+    import optparse
+    p = optparse.OptionParser('%prog SERVER[:port] account',
+        epilog='imapquota -s imap.mail.drexel.edu xyz12@drexel.edu')
+    p.add_option('-s', '--ssl', dest='ssl', default=False, action='store_true',
+                 help='Connect over an SSL encrypted socket and change default port to 993.')
+    options,args = p.parse_args()
+
+    server,account = args
+    server,port = parse_server(server, ssl=options.ssl)
+    password = getpass.getpass()
+
+    if options.ssl == True:
+        i = imaplib.IMAP4_SSL(server, port)
+    else:
+        i = imaplib.IMAP4(server, port)
+    i.login(account, password)
+    used,avail = get_quota(i)
+    i.logout()
+    print 'Used %d of %d KB' % (used, avail) 
+    print '%.1f percent' % (float(used)/avail*100.0)