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
|
'''All POSIX Type client support for Bcfg2'''
__revision__ = '$Revision$'
from stat import S_ISVTX, S_ISGID, S_ISUID, S_IXUSR, S_IWUSR, S_IRUSR, S_IXGRP
from stat import S_IWGRP, S_IRGRP, S_IXOTH, S_IWOTH, S_IROTH, ST_MODE, S_ISDIR
from stat import S_IFREG, ST_UID, ST_GID, S_ISREG, S_IFDIR, S_ISLNK
import binascii, difflib, grp, os, pwd, xml.sax.saxutils
import Bcfg2.Client.Tools
def calcPerms(initial, perms):
'''This compares ondisk permissions with specified ones'''
pdisp = [{1:S_ISVTX, 2:S_ISGID, 4:S_ISUID}, {1:S_IXUSR, 2:S_IWUSR, 4:S_IRUSR},
{1:S_IXGRP, 2:S_IWGRP, 4:S_IRGRP}, {1:S_IXOTH, 2:S_IWOTH, 4:S_IROTH}]
tempperms = initial
if len(perms) == 3:
perms = '0%s' % (perms)
pdigits = [int(perms[digit]) for digit in range(4)]
for index in range(4):
for (num, perm) in pdisp[index].iteritems():
if pdigits[index] & num:
tempperms |= perm
return tempperms
class POSIX(Bcfg2.Client.Tools.Tool):
'''POSIX File support code'''
__name__ = 'POSIX'
__handles__ = [('ConfigFile', None), ('Directory', None), ('Permissions', None), \
('SymLink', None)]
__req__ = {'ConfigFile': ['name', 'owner', 'group', 'perms'],
'Directory': ['name', 'owner', 'group', 'perms'],
'Permissions': ['name', 'owner', 'group', 'perms'],
'SymLink': ['name', 'to']}
def canInstall(self, entry):
'''Check if entry is complete for installation'''
if Bcfg2.Client.Tools.Tool.canInstall(self, entry):
if (entry.tag, entry.text, entry.get('empty', 'false')) == \
('ConfigFile', None, 'false'):
return False
return True
else:
return False
def VerifySymLink(self, entry, _):
'''Verify SymLink Entry'''
try:
sloc = os.readlink(entry.get('name'))
if sloc == entry.get('to'):
return True
self.logger.debug("Symlink %s points to %s, should be %s" % \
(entry.get('name'), sloc, entry.get('to')))
entry.set('current_to', sloc)
return False
except OSError:
entry.set('current_exists', 'false')
return False
def InstallSymLink(self, entry):
'''Install SymLink Entry'''
self.logger.info("Installing Symlink %s" % (entry.get('name')))
try:
fmode = os.lstat(entry.get('name'))[ST_MODE]
if S_ISREG(fmode) or S_ISLNK(fmode):
self.logger.debug("Non-directory entry already exists at %s" % \
(entry.get('name')))
os.unlink(entry.get('name'))
elif S_ISDIR(fmode):
self.logger.debug("Directory entry already exists at %s" % (entry.get('name')))
self.cmd.run("mv %s/ %s.bak" % (entry.get('name'), entry.get('name')))
else:
os.unlink(entry.get('name'))
except OSError:
self.logger.info("Symlink %s cleanup failed" % (entry.get('name')))
try:
os.symlink(entry.get('to'), entry.get('name'))
return True
except OSError:
return False
def VerifyDirectory(self, entry, _):
'''Verify Directory Entry'''
while len(entry.get('perms', '')) < 4:
entry.set('perms', '0' + entry.get('perms', ''))
try:
ondisk = os.stat(entry.get('name'))
except OSError:
entry.set('current_exists', 'false')
self.logger.debug("%s %s does not exist" %
(entry.tag, entry.get('name')))
return False
try:
owner = pwd.getpwuid(ondisk[ST_UID])[0]
group = grp.getgrgid(ondisk[ST_GID])[0]
except (OSError, KeyError):
self.logger.error('User resolution failing')
owner = 'root'
group = 'root'
perms = oct(os.stat(entry.get('name'))[ST_MODE])[-4:]
if ((owner == entry.get('owner')) and
(group == entry.get('group')) and
(perms == entry.get('perms'))):
return True
else:
if owner != entry.get('owner'):
entry.set('current_owner', owner)
self.logger.debug("%s %s ownership wrong" % (entry.tag, entry.get('name')))
if group != entry.get('group'):
entry.set('current_group', group)
self.logger.debug("%s %s group wrong" % (entry.tag, entry.get('name')))
if perms != entry.get('perms'):
entry.set('current_perms', perms)
self.logger.debug("%s %s permissions wrong: are %s should be %s" %
(entry.tag, entry.get('name'), perms, entry.get('perms')))
return False
def InstallDirectory(self, entry):
'''Install Directory Entry'''
self.logger.info("Installing Directory %s" % (entry.get('name')))
try:
fmode = os.lstat(entry.get('name'))
if not S_ISDIR(fmode[ST_MODE]):
self.logger.debug("Found a non-directory entry at %s" % (entry.get('name')))
try:
os.unlink(entry.get('name'))
except OSError:
self.logger.info("Failed to unlink %s" % (entry.get('name')))
return False
else:
self.logger.debug("Found a pre-existing directory at %s" % (entry.get('name')))
exists = True
except OSError:
# stat failed
exists = False
if not exists:
parent = "/".join(entry.get('name').split('/')[:-1])
if parent:
try:
os.lstat(parent)
except:
self.logger.debug('Creating parent path for directory %s' % (entry.get('name')))
for idx in xrange(len(parent.split('/')[:-1])):
current = '/'+'/'.join(parent.split('/')[1:2+idx])
try:
sloc = os.lstat(current)
try:
if not S_ISDIR(sloc[ST_MODE]):
os.unlink(current)
os.mkdir(current)
except OSError:
return False
except OSError:
try:
os.mkdir(current)
except OSError:
return False
try:
os.mkdir(entry.get('name'))
except OSError:
self.logger.error('Failed to create directory %s' % (entry.get('name')))
return False
try:
os.chown(entry.get('name'),
pwd.getpwnam(entry.get('owner'))[2], grp.getgrnam(entry.get('group'))[2])
os.chmod(entry.get('name'), calcPerms(S_IFDIR, entry.get('perms')))
return True
except (OSError, KeyError):
self.logger.error('Permission fixup failed for %s' % (entry.get('name')))
return False
def VerifyConfigFile(self, entry, _):
'''Install ConfigFile Entry'''
# configfile verify is permissions check + content check
permissionStatus = self.VerifyDirectory(entry, _)
if entry.get('encoding', 'ascii') == 'base64':
tempdata = binascii.a2b_base64(entry.text)
elif entry.get('empty', 'false') == 'true':
tempdata = ''
else:
if entry.text == None:
self.logger.error("Cannot verify incomplete ConfigFile %s" % (entry.get('name')))
return False
tempdata = entry.text
try:
content = open(entry.get('name')).read()
except IOError:
# file does not exist
return False
contentStatus = content == tempdata
if not contentStatus:
diff = '\n'.join([x for x in difflib.unified_diff(content.split('\n'), tempdata.split('\n'))])
try:
entry.set("current_diff", xml.sax.saxutils.quoteattr(diff))
except:
pass
return contentStatus and permissionStatus
def InstallConfigFile(self, entry):
'''Install ConfigFile Entry'''
self.logger.info("Installing ConfigFile %s" % (entry.get('name')))
parent = "/".join(entry.get('name').split('/')[:-1])
if parent:
try:
os.lstat(parent)
except:
self.logger.debug('Creating parent path for config file %s' % (entry.get('name')))
for idx in xrange(len(parent.split('/')[:-1])):
current = '/'+'/'.join(parent.split('/')[1:2+idx])
try:
sloc = os.lstat(current)
try:
if not S_ISDIR(sloc[ST_MODE]):
os.unlink(current)
os.mkdir(current)
except OSError:
return False
except OSError:
try:
os.mkdir(current)
except OSError:
return False
# If we get here, then the parent directory should exist
try:
newfile = open("%s.new"%(entry.get('name')), 'w')
if entry.get('encoding', 'ascii') == 'base64':
filedata = binascii.a2b_base64(entry.text)
elif entry.get('empty', 'false') == 'true':
filedata = ''
else:
filedata = entry.text
newfile.write(filedata)
newfile.close()
try:
os.chown(newfile.name, pwd.getpwnam(entry.get('owner'))[2],
grp.getgrnam(entry.get('group'))[2])
except KeyError:
os.chown(newfile.name, 0, 0)
os.chmod(newfile.name, calcPerms(S_IFREG, entry.get('perms')))
if entry.get("paranoid", False) and self.setup.get("paranoid", False):
self.cmd.run("cp %s /var/cache/bcfg2/%s" % (entry.get('name')))
os.rename(newfile.name, entry.get('name'))
return True
except (OSError, IOError), err:
if err.errno == 13:
self.logger.info("Failed to open %s for writing" % (entry.get('name')))
else:
print err
return False
|
