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
|
# Copyright:
# Moshe Zadka (c) 2002
# Canonical Ltd. (c) 2005 (DebconfCommunicator)
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY AUTHORS AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
import sys, os
import errno
import re
try:
import subprocess
using_subprocess = True
except ImportError:
import popen2
using_subprocess = False
import fcntl
class DebconfError(Exception):
pass
LOW, MEDIUM, HIGH, CRITICAL = 'low', 'medium', 'high', 'critical'
class Debconf:
def __init__(self, title=None, read=None, write=None):
for command in ('capb set reset title input beginblock endblock go get'
' register unregister subst fset fget previous_module'
' visible purge metaget exist version settitle'
' info progress data').split():
self.setCommand(command)
self.read = read or sys.stdin
self.write = write or sys.stdout
sys.stdout = sys.stderr
self.setUp(title)
def setUp(self, title):
self.version = self.version(2)
if self.version[:2] != '2.':
raise DebconfError(256, "wrong version: %s" % self.version)
self.capabilities = self.capb().split()
if title:
self.title(title)
def setCommand(self, command):
setattr(self, command,
lambda *args, **kw: self.command(command, *args, **kw))
def command(self, command, *params):
command = command.upper()
self.write.write("%s %s\n" % (command, ' '.join(map(str, params))))
self.write.flush()
while True:
try:
resp = self.read.readline().rstrip('\n')
break
except IOError, e:
if e.errno == errno.EINTR:
continue
else:
raise
if ' ' in resp:
status, data = resp.split(' ', 1)
else:
status, data = resp, ''
status = int(status)
if status == 0:
return data
elif status == 1: # unescaped data
unescaped = ''
for chunk in re.split(r'(\\.)', data):
if chunk.startswith('\\') and len(chunk) == 2:
if chunk[1] == 'n':
unescaped += '\n'
else:
unescaped += chunk[1]
else:
unescaped += chunk
return unescaped
else:
raise DebconfError(status, data)
def stop(self):
self.write.write('STOP\n')
self.write.flush()
def forceInput(self, priority, question):
try:
self.input(priority, question)
return 1
except DebconfError, e:
if e.args[0] != 30:
raise
return 0
def getBoolean(self, question):
result = self.get(question)
return result == 'true'
def getString(self, question):
return self.get(question)
class DebconfCommunicator(Debconf, object):
def __init__(self, owner, title=None, cloexec=False):
args = ['debconf-communicate', '-fnoninteractive', owner]
if using_subprocess:
self.dccomm = subprocess.Popen(args, stdin=subprocess.PIPE, stdout=subprocess.PIPE, close_fds=True)
read = self.dccomm.stdout
write = self.dccomm.stdin
else:
self.dccomm = popen2.Popen3(args)
read = self.dccomm.fromchild
write = self.dccomm.tochild
super(DebconfCommunicator, self).__init__(title=title,
read=read,
write=write)
if cloexec:
fcntl.fcntl(self.read.fileno(), fcntl.F_SETFD, fcntl.FD_CLOEXEC)
fcntl.fcntl(self.write.fileno(), fcntl.F_SETFD, fcntl.FD_CLOEXEC)
def shutdown(self):
if self.dccomm is not None:
if using_subprocess:
self.dccomm.stdin.close()
self.dccomm.stdout.close()
else:
self.dccomm.tochild.close()
self.dccomm.fromchild.close()
self.dccomm.wait()
self.dccomm = None
# Don't rely on this; call .shutdown() explicitly.
def __del__(self):
try:
self.shutdown()
except AttributeError:
pass
if ('DEBCONF_USE_CDEBCONF' in os.environ and
os.environ['DEBCONF_USE_CDEBCONF'] != ''):
_frontEndProgram = '/usr/lib/cdebconf/debconf'
else:
_frontEndProgram = '/usr/share/debconf/frontend'
def runFrontEnd():
if 'DEBIAN_HAS_FRONTEND' not in os.environ:
os.environ['PERL_DL_NONLAZY']='1'
os.execv(_frontEndProgram, [_frontEndProgram, sys.executable]+sys.argv)
if __name__ == '__main__':
runFrontEnd()
db = Debconf()
db.forceInput(CRITICAL, 'bsdmainutils/calendar_lib_is_not_empty')
db.go()
less = db.getBoolean('less/add_mime_handler')
aptlc = db.getString('apt-listchanges/email-address')
db.stop()
print db.version
print db.capabilities
print less
print aptlc
|