2 ## vim:set et ts=2 sw=2 ai:
3 # Send email reminders to users having sizable homedirs.
5 # Copyright (c) 2013 Philipp Kern <pkern@debian.org>
6 # Copyright (c) 2013 Peter Palfrader <peter@palfrader.org>
7 # Copyright (c) 2013 Luca Filipozzi <lfilipoz@debian.org>
9 # Permission is hereby granted, free of charge, to any person obtaining a copy
10 # of this software and associated documentation files (the "Software"), to deal
11 # in the Software without restriction, including without limitation the rights
12 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 # copies of the Software, and to permit persons to whom the Software is
14 # furnished to do so, subject to the following conditions:
16 # The above copyright notice and this permission notice shall be included in
17 # all copies or substantial portions of the Software.
19 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 from __future__ import print_function
29 from collections import defaultdict
31 import email.mime.text
43 # avoid base64 encoding for utf-8
44 email.charset.add_charset('utf-8', email.charset.SHORTEST, email.charset.QP)
48 if DRYRUN: SENDMAIL_COMMAND = ['/bin/cat']
49 else: SENDMAIL_COMMAND = ['/usr/sbin/sendmail', '-t', '-oi']
51 if DRYRUN: RM_COMMAND = ['/bin/echo', 'Would remove']
52 else: RM_COMMAND = ['/bin/rm', '-rf']
56 {hostname}'s /home is, unfortunately, not infinite in size. If you have
57 anything in there that you no longer need, please clean it up."""
59 Can you please look at your $HOME on {hostname} and remove files which
60 you no longer need (such as old sources)."""
62 Thanks for your porting effort on {hostname}!
64 Please note that on most porterboxes /home is quite small, so please remove
65 files that you do not need anymore."""
69 { 'size': 10240, 'notifyafter': 5}, #, 'deleteafter': 40 },
70 { 'size': 1024, 'notifyafter': 10}, #, 'deleteafter': 50 },
71 { 'size': 100, 'notifyafter': 30}, #, 'deleteafter': 90 },
72 { 'size': 20, 'notifyafter': 90}, #, 'deleteafter': 150 },
73 { 'size': 5, 'deleteafter': 450 }
75 EXCLUDED_USERNAMES = ['lost+found']
76 MAIL_FROM = 'debian-admin (via Cron) <bulk@admin.debian.org>'
77 MAIL_TO = '{username}@{hostname}.debian.org'
78 MAIL_CC = 'debian-admin (bulk sink) <bulk@admin.debian.org>'
79 MAIL_REPLYTO = 'debian-admin <dsa@debian.org>'
80 MAIL_SUBJECT = 'Please clean up ~{username} on {hostname}.debian.org'
86 For your information, you last logged into {hostname} {days_ago} days
87 ago, and your home directory there is {homedir_size} MB in size.
89 If you currently do not use {hostname}, please keep ~{username} under
92 Please assist us in freeing up space by deleting schroots, also.
96 Debian System Administration Team via Cron
98 PS: replies not required.
101 class Error(Exception):
104 class SendmailError(Error):
107 class LastlogTimes(dict):
108 LASTLOG_STRUCT = '=L32s256s'
111 record_size = struct.calcsize(self.LASTLOG_STRUCT)
112 with open('/var/log/lastlog', 'r') as fp:
113 uid = -1 # there is one record per uid in lastlog
114 for record in iter(lambda: fp.read(record_size), ''):
115 uid += 1 # so keep incrementing uid for each record read
116 lastlog_time, _, _ = list(struct.unpack(self.LASTLOG_STRUCT, record))
118 self[pwd.getpwuid(uid).pw_name] = lastlog_time
120 # this is a normal condition.
121 #logging.error('could not resolve username from uid %d', uid)
124 class HomedirSizes(dict):
126 for direntry in glob.glob('/home/*'):
127 username = os.path.basename(direntry)
129 if username in EXCLUDED_USERNAMES:
133 pwinfo = pwd.getpwnam(username)
135 if os.path.isdir(direntry):
136 logging.warning('directory %s exists on %s but there is no %s user', direntry, platform.node(), username)
139 if pwinfo.pw_dir != direntry:
140 logging.warning('home directory for %s is not %s, but that exists. confused.', username, direntry)
143 command = ['/usr/bin/du', '-ms', pwinfo.pw_dir]
144 p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
145 (stdout, stderr) = p.communicate()
146 if p.returncode != 0: # ignore errors from du
147 logging.info('%s failed:', ' '.join(command))
151 self[username] = int(stdout.split('\t')[0])
153 logging.error('could not convert size output from %s: %s', ' '.join(command), stdout)
156 class HomedirReminder(object):
158 self.lastlog_times = LastlogTimes()
159 self.homedir_sizes = HomedirSizes()
161 def send_mail(self, **kwargs):
162 msg = email.mime.text.MIMEText(MAIL_MESSAGE.format(**kwargs), _charset='UTF-8')
163 msg['From'] = MAIL_FROM.format(**kwargs)
164 msg['To'] = MAIL_TO.format(**kwargs)
166 msg['Cc'] = MAIL_CC.format(**kwargs)
167 if MAIL_REPLYTO != "":
168 msg['Reply-To'] = MAIL_REPLYTO.format(**kwargs)
169 msg['Subject'] = MAIL_SUBJECT.format(**kwargs)
170 msg['Precedence'] = "bulk"
171 msg['Auto-Submitted'] = "auto-generated by mail-big-homedirs"
172 p = subprocess.Popen(SENDMAIL_COMMAND, stdin=subprocess.PIPE)
173 p.communicate(msg.as_string())
174 logging.debug(msg.as_string())
175 if p.returncode != 0:
178 def remove(self, username):
180 pwinfo = pwd.getpwnam(username)
184 command = RM_COMMAND + [pwinfo.pw_dir]
185 p = subprocess.check_call(command)
188 current_time = time.time()
189 explanation_template = EXPLANATIONS[random.randint(0,len(EXPLANATIONS)-1)]
191 for username, homedir_size in self.homedir_sizes.iteritems():
193 name = pwd.getpwnam(username).pw_gecos.decode('utf-8').split(',', 1)[0].split(',', 1)[0]
196 lastlog_time = self.lastlog_times[username]
197 days_ago = int( (current_time - lastlog_time) / 3600 / 24 )
202 if homedir_size > x['size'] and 'notifyafter' in x and days_ago >= x['notifyafter']: notify = True
203 if homedir_size > x['size'] and 'deleteafter' in x and days_ago >= x['deleteafter']: remove = True
206 self.remove(username=username)
208 explanation = explanation_template.format(hostname=platform.node())
209 self.send_mail(hostname=platform.node(), username=username, name=name, explanation=explanation, homedir_size=homedir_size, days_ago=days_ago)
211 if __name__ == '__main__':
212 logging.basicConfig()
213 # DEBUG for debugging, ERROR for production.
214 logging.getLogger().setLevel(logging.ERROR)
215 HomedirReminder().run()