1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
|
#!/usr/bin/python -u
# vim: set fileencoding=utf-8 :
#
# (C) 2010 Guido Guenther <agx@sigxcpu.org>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import glob
import os
import logging
import re
import subprocess
import sys
from optparse import OptionParser
import lsb_release
class PkgError(Exception):
pass
class Process(object):
"""A process, needs /proc mounted"""
def __init__(self, pid):
self.pid = pid
self.mapped = []
try:
# Linux only so far
self.exe = os.readlink('/proc/%d/exe' % self.pid)
self.cmdline = open('/proc/%d/cmdline' % self.pid).read()
except OSError:
self.exe = None
self.cmdline = None
def _read_maps(self):
for line in file('/proc/%d/maps' % self.pid):
try:
so = line.split()[5].strip()
self.mapped.append(so)
except IndexError:
pass
def maps(self, path):
"""check if process maps the object at path"""
if not self.mapped:
self._read_maps()
if path in self.mapped:
return True
else:
return False
def __repr__(self):
return "<Process object pid:%d>" % self.pid
class Distro(object):
@classmethod
def pkg(klass, path):
raise NotImplementedError
@classmethod
def pkg_by_file(klass, path):
raise NotImplementedError
class Pkg(object):
services = None
shared_objects = None
def __init__(self):
raise NotImplementedError
class DebianDistro(Distro):
"Debian (dpkg) based distribution"""
@classmethod
def pkg(klass, name):
return DebianPkg(name)
@classmethod
def pkg_by_file(klass, path):
find_file = subprocess.Popen(["dpkg-query -S %s 2>/dev/null" % path],
stdout=subprocess.PIPE, shell=True)
output = find_file.communicate()[0]
if find_file.returncode:
return None
pkg = output.split(':')[0]
return DebianPkg(pkg)
@classmethod
def restart_service(klass, name):
subprocess.call('invoke-rc.d %s restart' % name, shell = True)
class DebianPkg(Pkg):
def __init__(self, name):
self.name = name
self._services = None
self._shared_objects = None
def _get_shared_objects(self):
if self._shared_objects != None:
return self._shared_objects
self._shared_objects = []
regex = re.compile(r'(?P<so>/.*\.so(\.[^/])*$)')
list_contents = subprocess.Popen(["dpkg-query -L %s 2>/dev/null" % self.name],
stdout=subprocess.PIPE, shell=True)
output = list_contents.communicate()[0]
if list_contents.returncode:
raise PkgError
for line in output.split('\n'):
m = regex.match(line)
if m:
self._shared_objects.append(m.group('so'))
return self._shared_objects
def _get_services(self):
if self._services != None:
return self._services
self._services = []
# Only supports sysvinit so far:
script_re = re.compile('/etc/init.d/[a-zA-Z0-9]')
list_contents = subprocess.Popen(["dpkg-query -L %s 2>/dev/null" % self.name],
stdout=subprocess.PIPE, shell=True)
output = list_contents.communicate()[0]
if list_contents.returncode:
raise PkgError
for line in output.split('\n'):
if script_re.match(line):
self._services.append(os.path.basename(line.strip()))
return self._services
def __repr__(self):
return "<Debian Pkg object name:'%s'>" % self.name
services = property(_get_services, None)
shared_objects = property(_get_shared_objects, None)
def check_maps(procs, shared_objects):
restart_procs = {}
for proc in procs:
for so in shared_objects:
if proc.maps(so):
if restart_procs.has_key(proc.exe):
restart_procs[proc.exe] += [ proc ]
else:
restart_procs[proc.exe] = [ proc ]
continue
return restart_procs
def get_all_pids():
processes = []
paths = glob.glob('/proc/[0-9]*')
for path in paths:
p = Process(int(path.rsplit('/')[-1]))
processes.append(p)
return processes
def detect_distro():
distro_id = lsb_release.get_distro_information()['ID']
if distro_id == 'Debian':
logging.debug("Detected Debian distribution")
return DebianDistro
else:
return None
def main(argv):
shared_objects = []
parser = OptionParser(usage='%prog [options] pkg1 [pkg2 pkg3 pkg4]')
parser.add_option("--debug", action="store_true", dest="debug", default=False,
help="enable debug output")
parser.add_option("--restart", action="store_true", dest="restart", default=False,
help="Restart services")
(options, args) = parser.parse_args(argv[1:])
if options.debug:
level = logging.DEBUG
else:
level = logging.WARNING
logging.basicConfig(level=level,
format='%(levelname)s: %(message)s')
distro = detect_distro()
if not distro:
logging.error("Unsupported Distribution")
return 1
if not args:
parser.print_help()
return 1
else:
pkgs = [ distro.pkg(arg) for arg in args ]
# Find shared objects of updated packages
for pkg in pkgs:
try:
shared_objects += pkg.shared_objects
except PkgError:
logging.error("Cannot parse contents of %s" % pkg.name)
return 1
logging.debug("Found shared objects:")
map(lambda x: logging.debug(" %s", x), shared_objects)
# Find processes that map them
restart_procs = check_maps(get_all_pids(), shared_objects)
logging.debug("Processes that map them:")
map(lambda (x, y): logging.debug(" Exe: %s Pids: %s", x, y), restart_procs.items())
# Find packages that contain the binaries of these processes
pkgs = {}
for proc in restart_procs:
pkg = distro.pkg_by_file(proc)
if not pkg:
logging.warning("No package found for '%s' - restart manually" % proc)
else:
if pkgs.has_key(pkg.name):
pkgs[pkg.name].procs.append(proc)
else:
pkg.procs = [ proc ]
pkgs[pkg.name] = pkg
logging.debug("Packages and binaries:")
map(lambda x: logging.debug(" Pkg: %s, binaries: %s" % (x.name, x.procs)),
pkgs.values())
all_services = set()
for pkg in pkgs.values():
services = set(pkg.services)
if not services:
logging.warning("No service script found in '%s' for '%s' - restart manually"
% (pkg.name, pkg.procs))
else:
all_services = all_services.union(services)
if options.restart:
for service in all_services:
logging.info("Restarting %s" % service)
distro.restart_service(service)
else:
print "Services that possibly need to be restarted:"
for s in all_services:
print s
return 0
if __name__ == '__main__':
sys.exit(main(sys.argv))
# vim:et:ts=4:sw=4:et:sts=4:ai:set list listchars=tab\:»·,trail\:·:
|