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
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
|
#
# rescue.py - anaconda rescue mode setup
#
# Mike Fulbright <msf@redhat.com>
# Jeremy Katz <katzj@redhat.com>
#
# Copyright 2001-2004 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# library public license.
#
# You should have received a copy of the GNU Library Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import upgrade
from snack import *
from constants_text import *
from text import WaitWindow, OkCancelWindow, ProgressWindow, stepToClasses
import sys
import os
import isys
import iutil
import fsset
import shutil
from rhpl.translate import _
import logging
log = logging.getLogger("anaconda")
class RescueInterface:
def waitWindow(self, title, text):
return WaitWindow(self.screen, title, text)
def progressWindow(self, title, text, total):
return ProgressWindow(self.screen, title, text, total)
def messageWindow(self, title, text, type = "ok"):
if type == "ok":
ButtonChoiceWindow(self.screen, _(title), _(text),
buttons = [ _("OK") ])
elif type == "yesno":
btnlist = [TEXT_YES_BUTTON, TEXT_NO_BUTTON]
rc = ButtonChoiceWindow(self.screen, _(title), _(text),
buttons=btnlist)
if rc == "yes":
return 1
else:
return 0
else:
return OkCancelWindow(self.screen, _(title), _(text))
def __init__(self, screen):
self.screen = screen
# XXX grub-install is stupid and uses df output to figure out
# things when installing grub. make /etc/mtab be at least
# moderately useful.
def makeMtab(instPath, theFsset):
child = os.fork()
if (not child):
os.chroot(instPath)
f = open("/etc/mtab", "w+")
f.write(theFsset.mtab())
f.close()
os._exit(0)
# make sure they have a resolv.conf in the chroot
def makeResolvConf(instPath):
if not os.access("/etc/resolv.conf", os.R_OK):
return
if os.access("%s/etc/resolv.conf" %(instPath,), os.R_OK):
f = open("%s/etc/resolv.conf" %(instPath,), "r")
buf = f.read()
f.close()
else:
buf = ""
# already have a nameserver line, don't worry about it
if buf.find("nameserver") != -1:
return
f = open("/etc/resolv.conf", "r")
buf = f.read()
f.close()
# no nameserver, we can't do much about it
if buf.find("nameserver") == -1:
return
shutil.copyfile("%s/etc/resolv.conf" %(instPath,),
"%s/etc/resolv.conf.bak" %(instPath,))
f = open("%s/etc/resolv.conf" %(instPath,), "w+")
f.write(buf)
f.close()
# XXX
# probably belongs somewhere else
#
def methodUsesNetworking(methodstr):
for m in ['http://', 'ftp://', 'nfs:/', 'nfsiso:/']:
if methodstr.startswith(m):
return 1
return 0
# XXX
# hack to write out something useful for networking and start interfaces
#
def startNetworking(network, intf):
# do lo first
try:
os.system("/usr/bin/ifconfig lo 127.0.0.1")
except:
log.error("Error trying to start lo in rescue.py::startNetworking()")
# start up dhcp interfaces first
dhcpGotNS = 0
devs = network.netdevices.keys()
devs.sort()
for devname in devs:
dev = network.netdevices[devname]
waitwin = intf.waitWindow(_("Starting Interface"),
_("Attempting to start %s") % (dev.get('device'),))
log.info("Attempting to start %s", dev.get('device'))
if dev.get('bootproto') == "dhcp":
try:
ns = isys.pumpNetDevice(dev.get('device'))
if ns:
if not dhcpGotNS:
dhcpGotNS = 1
f = open("/etc/resolv.conf", "w")
f.write("nameserver %s\n" % ns)
f.close()
except:
log.error("Error trying to start %s in rescue.py::startNetworking()", dev.get('device'))
elif dev.get('ipaddr') and dev.get('netmask') and network.gateway is not None:
try:
isys.configNetDevice(dev.get('device'),
dev.get('ipaddr'),
dev.get('netmask'),
network.gateway)
except:
log.error("Error trying to start %s in rescue.py::startNetworking()", dev.get('device'))
waitwin.pop()
# write out resolv.conf if dhcp didnt get us one
if not dhcpGotNS:
f = open("/etc/resolv.conf", "w")
if network.domains != ['localdomain'] and network.domains:
f.write("search %s\n" % (string.joinfields(network.domains, ' '),))
for ns in network.nameservers():
if ns:
f.write("nameserver %s\n" % (ns,))
f.close()
def runRescue(instPath, mountroot, id):
for file in [ "services", "protocols", "group", "joe", "man.config",
"nsswitch.conf", "selinux" ]:
try:
os.symlink('/mnt/runtime/etc/' + file, '/etc/' + file)
except:
pass
# see if they would like networking enabled
if not methodUsesNetworking(id.methodstr):
screen = SnackScreen()
while 1:
rc = ButtonChoiceWindow(screen, _("Setup Networking"),
_("Do you want to start the network interfaces on "
"this system?"), [_("Yes"), _("No")])
if rc != string.lower(_("No")):
intf = RescueInterface(screen)
# need to call sequence of screens, have to look in text.py
#
# this code is based on main loop in text.py, and if it
# or the network step in dispatch.py change significantly
# then this will certainly break
#
pyfile = "network_text"
classNames = ("NetworkDeviceWindow", "NetworkGlobalWindow")
lastrc = INSTALL_OK
step = 0
dir = 1
while 1:
s = "from %s import %s; nextWindow = %s" % \
(pyfile, classNames[step], classNames[step])
exec s
win = nextWindow()
if classNames[step] == "NetworkDeviceWindow":
args = (id.network, dir, intf, None, 0)
else:
args = (id.network, dir, intf, None)
rc = apply(win, (screen, ) + args)
if rc == INSTALL_NOOP:
rc = lastrc
if rc == INSTALL_BACK:
step = step - 1
dir = - 1
elif rc == INSTALL_OK:
step = step + 1
dir = 1
lastrc = rc
if step == -1:
ButtonChoiceWindow(screen, _("Cancelled"),
_("I can't go to the previous step "
"from here. You will have to try "
"again."),
buttons=[_("OK")])
dir = 1
step = 0
elif step >= len(classNames):
break
startNetworking(id.network, intf)
break
else:
break
screen.finish()
if (not mountroot):
print
print _("When finished please exit from the shell and your "
"system will reboot.")
print
os.system("/bin/sh")
sys.exit(0)
# lets create some devices
iutil.makeDriveDeviceNodes()
iutil.makeCharDeviceNodes()
# need loopback devices too
for lpminor in range(8):
dev = "loop%s" % (lpminor,)
isys.makeDevInode(dev, "/dev/" + dev)
screen = SnackScreen()
intf = RescueInterface(screen)
# prompt to see if we should try and find root filesystem and mount
# everything in /etc/fstab on that root
rc = ButtonChoiceWindow(screen, _("Rescue"),
_("The rescue environment will now attempt to find your "
"Linux installation and mount it under the directory "
"%s. You can then make any changes required to your "
"system. If you want to proceed with this step choose "
"'Continue'. You can also choose to mount your file systems "
"read-only instead of read-write by choosing 'Read-Only'."
"\n\n"
"If for some reason this process fails you can choose 'Skip' "
"and this step will be skipped and you will go directly to a "
"command shell.\n\n") % (instPath,),
[_("Continue"), _("Read-Only"), _("Skip")] )
if rc == string.lower(_("Skip")):
screen.finish()
print
print _("When finished please exit from the shell and your "
"system will reboot.")
print
os.execv("/bin/sh", [ "-/bin/sh" ])
elif rc == string.lower(_("Read-Only")):
readOnly = 1
else:
readOnly = 0
disks = upgrade.findExistingRoots(intf, id, instPath, upgradeany = 1)
if not disks:
root = None
elif len(disks) == 1:
root = disks[0]
else:
height = min (len (disks), 12)
if height == 12:
scroll = 1
else:
scroll = 0
partList = []
for (drive, fs, relstr) in disks:
partList.append(drive)
(button, choice) = \
ListboxChoiceWindow(screen, _("System to Rescue"),
_("What partition holds the root partition "
"of your installation?"), partList,
[ _("OK"), _("Exit") ], width = 30,
scroll = scroll, height = height,
help = "multipleroot")
if button == string.lower (_("Exit")):
root = None
else:
root = disks[choice]
rootmounted = 0
if root:
try:
fs = fsset.FileSystemSet()
# only pass first two parts of tuple for root, since third
# element is a comment we dont want
rc = upgrade.mountRootPartition(intf, root[:2],
fs, instPath,
allowDirty = 1, warnDirty = 1,
readOnly = readOnly)
if rc == -1:
ButtonChoiceWindow(screen, _("Rescue"),
_("Your system had dirty file systems which you chose not "
"to mount. Press return to get a shell from which "
"you can fsck and mount your partitions. The system "
"will reboot automatically when you exit from the "
"shell."), [_("OK")], width = 50)
rootmounted = 0
else:
ButtonChoiceWindow(screen, _("Rescue"),
_("Your system has been mounted under %s.\n\n"
"Press <return> to get a shell. If you would like to "
"make your system the root environment, run the command:\n\n"
"\tchroot %s\n\nThe system will reboot "
"automatically when you exit from the shell.") %
(instPath,instPath),
[_("OK")] )
rootmounted = 1
# now turn on swap
if not readOnly:
try:
fs.turnOnSwap("/")
except:
log.error("Error enabling swap")
# now that dev is udev, bind mount the installer dev there
isys.mount("/dev", "/mnt/sysimage/dev", bindMount = 1)
# set a library path to use mounted fs
os.environ["LD_LIBRARY_PATH"] = "/lib:/usr/lib:/usr/X11R6/lib:/lib:/mnt/usr/lib:/mnt/sysimage/lib:/mnt/sysimage/usr/lib:/mnt/sysimage/usr/X11R6/lib"
# get man pages to work
os.environ["MANPATH"] = "/mnt/sysimage/usr/share/man:/mnt/sysimage/usr/local/share/man"
# find groff data dir
try:
glst = os.listdir("/mnt/sysimage/usr/share/groff")
# find a directory which is a numeral, its where
# data files are
gversion = None
for gdir in glst:
try:
isone = 1
for idx in range(0, len(gdir)):
if string.find(string.digits + '.', gdir[idx]) == -1:
isone = 0
break
if isone:
gversion = gdir
break
except:
gversion = None
continue
except:
gversion = None
if gversion is not None:
gpath = "/mnt/sysimage/usr/share/groff/"+gversion
os.environ["GROFF_FONT_PATH"] = gpath + '/font'
os.environ["GROFF_TMAC_PATH"] = "%s:/mnt/sysimage/usr/share/groff/site-tmac" % (gpath + '/tmac',)
# do we have bash?
try:
if os.access("/usr/bin/bash", os.R_OK):
os.symlink ("/usr/bin/bash", "/bin/bash")
except:
pass
except:
# This looks horrible, but all it does is catch every exception,
# and reraise those in the tuple check. This lets programming
# errors raise exceptions, while any runtime error will
# still result in a shell.
(exc, val) = sys.exc_info()[0:2]
if exc in (IndexError, ValueError, SyntaxError):
raise exc, val, sys.exc_info()[2]
ButtonChoiceWindow(screen, _("Rescue"),
_("An error occurred trying to mount some or all of your "
"system. Some of it may be mounted under %s.\n\n"
"Press <return> to get a shell. The system will reboot "
"automatically when you exit from the shell.") % (instPath,),
[_("OK")] )
else:
ButtonChoiceWindow(screen, _("Rescue Mode"),
_("You don't have any Linux partitions. Press "
"return to get a shell. The system will reboot "
"automatically when you exit from the shell."),
[ _("OK") ], width = 50)
screen.finish()
print
if rootmounted and not readOnly:
makeMtab(instPath, fs)
try:
makeResolvConf(instPath)
except Exception, e:
log.error("error making a resolv.conf: %s" %(e,))
print _("Your system is mounted under the %s directory.") % (instPath,)
print
print _("When finished please exit from the shell and your "
"system will reboot.")
print
os.system("/bin/sh")
sys.exit(0)
|