#
# rescue.py - anaconda rescue mode setup
#
# Copyright (C) 2001, 2002, 2003, 2004 Red Hat, Inc. All rights reserved.
#
# 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 2 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 .
#
# Author(s): Mike Fulbright
# Jeremy Katz
#
import upgrade
from snack import *
from constants import *
from constants_text import *
from text import WaitWindow, OkCancelWindow, ProgressWindow, PassphraseEntryWindow, stepToClasses
from flags import flags
import sys
import os
import isys
from storage import mountExistingSystem
from installinterfacebase import InstallInterfaceBase
import iutil
import shutil
import time
import network
import subprocess
import gettext
_ = lambda x: gettext.ldgettext("anaconda", x)
import logging
log = logging.getLogger("anaconda")
class RescueInterface(InstallInterfaceBase):
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 detailedMessageWindow(self, title, text, longText=None, type="ok",
default=None, custom_icon=None,
custom_buttons=[]):
return self.messageWindow(title, text, type, default, custom_icon,
custom_buttons)
def messageWindow(self, title, text, type = "ok", default = None,
custom_icon=None, custom_buttons=[]):
if type == "ok":
ButtonChoiceWindow(self.screen, title, text,
buttons=[TEXT_OK_BUTTON])
elif type == "yesno":
if default and default == "no":
btnlist = [TEXT_NO_BUTTON, TEXT_YES_BUTTON]
else:
btnlist = [TEXT_YES_BUTTON, TEXT_NO_BUTTON]
rc = ButtonChoiceWindow(self.screen, title, text,
buttons=btnlist)
if rc == "yes":
return 1
else:
return 0
elif type == "custom":
tmpbut = []
for but in custom_buttons:
tmpbut.append(string.replace(but,"_",""))
rc = ButtonChoiceWindow(self.screen, title, text, width=60,
buttons=tmpbut)
idx = 0
for b in tmpbut:
if string.lower(b) == rc:
return idx
idx = idx + 1
return 0
else:
return OkCancelWindow(self.screen, title, text)
def enableNetwork(self, anaconda):
if len(anaconda.network.netdevices) == 0:
return False
from netconfig_text import NetworkConfiguratorText
w = NetworkConfiguratorText(self.screen, anaconda)
ret = w.run()
return ret != INSTALL_BACK
def passphraseEntryWindow(self, device):
w = PassphraseEntryWindow(self.screen, device)
(passphrase, isglobal) = w.run()
w.pop()
return (passphrase, isglobal)
def resetInitializeDiskQuestion(self):
self._initLabelAnswers = {}
def resetReinitInconsistentLVMQuestion(self):
self._inconsistentLVMAnswers = {}
def shutdown (self):
pass
def suspend(self):
pass
def resume(self):
pass
def __init__(self, screen):
InstallInterfaceBase.__init__(self)
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, storage):
try:
f = open(instPath + "/etc/mtab", "w+")
except IOError, e:
log.info("failed to open /etc/mtab for write: %s" % e)
return
try:
f.write(storage.mtab)
finally:
f.close()
def makeFStab(instPath = ""):
if os.access("/proc/mounts", os.R_OK):
f = open("/proc/mounts", "r")
buf = f.read()
f.close()
else:
buf = ""
try:
f = open(instPath + "/etc/fstab", "a")
if buf:
f.write(buf)
f.close()
except IOError, e:
log.info("failed to write /etc/fstab: %s" % e)
# 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()
#
# Write out something useful for networking and start interfaces
#
def startNetworking(network, intf):
# do lo first
try:
os.system("/usr/sbin/ifconfig lo 127.0.0.1")
except:
log.error("Error trying to start lo in rescue.py::startNetworking()")
# start up dhcp interfaces first
if not network.bringUp():
log.error("Error bringing up network interfaces")
def runShell(screen = None, msg=""):
if screen:
screen.suspend()
print
if msg:
print (msg)
print(_("When finished please exit from the shell and your "
"system will reboot."))
print
proc = None
if os.path.exists("/usr/bin/firstaidkit-qs"):
proc = subprocess.Popen(["/usr/bin/firstaidkit-qs"])
proc.wait()
if proc is None or proc.returncode!=0:
if os.path.exists("/bin/bash"):
iutil.execConsole()
else:
print(_("Unable to find /bin/sh to execute! Not starting shell"))
time.sleep(5)
if screen:
screen.finish()
def runRescue(anaconda):
for file in [ "services", "protocols", "group", "joe", "man.config",
"nsswitch.conf", "selinux", "mke2fs.conf" ]:
try:
os.symlink('/mnt/runtime/etc/' + file, '/etc/' + file)
except:
pass
# see if they would like networking enabled
if not network.hasActiveNetDev():
screen = SnackScreen()
while True:
rc = ButtonChoiceWindow(screen, _("Setup Networking"),
_("Do you want to start the network interfaces on "
"this system?"), [_("Yes"), _("No")])
if rc != string.lower(_("No")):
anaconda.intf = RescueInterface(screen)
if not anaconda.intf.enableNetwork(anaconda):
anaconda.intf.messageWindow(_("No Network Available"),
_("Unable to activate a networking device. Networking "
"will not be available in rescue mode."))
break
startNetworking(anaconda.network, anaconda.intf)
break
else:
break
anaconda.intf = None
screen.finish()
# Early shell access with no disk access attempts
if not anaconda.rescue_mount:
# the %post should be responsible for mounting all needed file systems
# NOTE: 1st script must be bash or simple python as nothing else might be available in the rescue image
if anaconda.ksdata:
from kickstart import runPostScripts
runPostScripts(anaconda)
else:
runShell()
sys.exit(0)
screen = SnackScreen()
anaconda.intf = RescueInterface(screen)
if anaconda.ksdata:
if anaconda.ksdata.rescue and anaconda.ksdata.rescue.romount:
readOnly = 1
else:
readOnly = 0
else:
# 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") % (anaconda.rootPath,),
[_("Continue"), _("Read-Only"), _("Skip")] )
if rc == string.lower(_("Skip")):
runShell(screen)
sys.exit(0)
elif rc == string.lower(_("Read-Only")):
readOnly = 1
else:
readOnly = 0
import storage
storage.storageInitialize(anaconda)
disks = upgrade.findExistingRoots(anaconda, upgradeany=True)
if not disks:
root = None
elif (len(disks) == 1) or anaconda.ksdata:
root = disks[0]
else:
height = min (len (disks), 12)
if height == 12:
scroll = 1
else:
scroll = 0
devList = []
for (device, relstr) in disks:
if getattr(device.format, "label", None):
devList.append("%s (%s) - %s" % (device.name, device.format.label, relstr))
else:
devList.append("%s - %s" % (device.name, relstr))
(button, choice) = \
ListboxChoiceWindow(screen, _("System to Rescue"),
_("Which device holds the root partition "
"of your installation?"), devList,
[ _("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:
rc = mountExistingSystem(anaconda, root,
allowDirty = 1, warnDirty = 1,
readOnly = readOnly)
if rc == -1:
if anaconda.ksdata:
log.error("System had dirty file systems which you chose not to mount")
else:
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:
if anaconda.ksdata:
log.info("System has been mounted under: %s" % anaconda.rootPath)
else:
ButtonChoiceWindow(screen, _("Rescue"),
_("Your system has been mounted under %(rootPath)s.\n\n"
"Press to get a shell. If you would like to "
"make your system the root environment, run the command:\n\n"
"\tchroot %(rootPath)s\n\nThe system will reboot "
"automatically when you exit from the shell.") %
{'rootPath': anaconda.rootPath},
[_("OK")] )
rootmounted = 1
# now turn on swap
if not readOnly:
try:
anaconda.storage.turnOnSwap()
except:
log.error("Error enabling swap")
# and /selinux too
if flags.selinux and os.path.isdir("%s/selinux" %(anaconda.rootPath,)):
try:
isys.mount("/selinux", "%s/selinux" %(anaconda.rootPath,),
"selinuxfs")
except Exception, e:
log.error("error mounting selinuxfs: %s" %(e,))
fd = open("%s/.autorelabel" % anaconda.rootPath, "w+")
fd.close()
# set a library path to use mounted fs
libdirs = os.environ["LD_LIBRARY_PATH"].split(":")
mounted = map(lambda dir: "/mnt/sysimage%s" % dir, libdirs)
os.environ["LD_LIBRARY_PATH"] = ":".join(libdirs + mounted)
# 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]
log.error(str(exc)+": "+str(val))
if exc in (IndexError, ValueError, SyntaxError):
raise exc, val, sys.exc_info()[2]
if anaconda.ksdata:
log.error("An error occurred trying to mount some or all of your system")
else:
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 to get a shell. The system will reboot "
"automatically when you exit from the shell.") % (anaconda.rootPath,),
[_("OK")] )
else:
if anaconda.ksdata:
log.info("No Linux partitions found")
screen.finish()
print(_("You don't have any Linux partitions. Rebooting.\n"))
sys.exit(0)
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)
msgStr = ""
if rootmounted and not readOnly:
makeMtab(anaconda.rootPath, anaconda.storage)
try:
makeResolvConf(anaconda.rootPath)
except Exception, e:
log.error("error making a resolv.conf: %s" %(e,))
msgStr = _("Your system is mounted under the %s directory.") % (anaconda.rootPath,)
#create /etc/fstab in ramdisk, so it is easier to work with RO mounted filesystems
makeFStab()
# run %post if we've mounted everything
if anaconda.ksdata:
from kickstart import runPostScripts
runPostScripts(anaconda)
else:
runShell(screen, msgStr)
sys.exit(0)