#
# 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
from add_drive_text import addDriveDialog
import iutil
import shutil
import time
import network
import subprocess
from pykickstart.constants import *
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, updpct=0.05, pulse=False):
return ProgressWindow(self.screen, title, text, total, updpct, pulse)
def detailedMessageWindow(self, title, text, longText=None, type="ok",
default=None, custom_icon=None,
custom_buttons=[], expanded=False):
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.id.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 questionInitializeDisk(self, path, description, size, details=""):
# Never initialize disks in rescue mode!
return False
def questionReinitInconsistentLVM(self, pv_names=None, lv_name=None, vg_name=None):
# Never reinit VG's in rescue mode!
return False
def questionInitializeDASD(self, c, devs):
# Special return value to let dasd.py know we're rescue mode
return 1
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, instClass):
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.id.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.isKickstart and anaconda.id.ksdata.scripts:
from kickstart import runPostScripts
runPostScripts(anaconda)
else:
runShell()
sys.exit(0)
screen = SnackScreen()
anaconda.intf = RescueInterface(screen)
if anaconda.isKickstart:
if anaconda.id.ksdata.rescue and anaconda.id.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
while True:
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'. "
"If you need to activate SAN devices choose 'Advanced'."
"\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"), _("Advanced")] )
if rc == string.lower(_("Skip")):
runShell(screen)
sys.exit(0)
elif rc == string.lower(_("Advanced")):
addDialog = addDriveDialog(anaconda)
addDialog.addDriveDialog(screen)
continue
elif rc == string.lower(_("Read-Only")):
readOnly = 1
else:
readOnly = 0
break
import storage
storage.storageInitialize(anaconda)
disks = upgrade.findExistingRoots(anaconda, upgradeany=True)
if not disks:
root = None
elif (len(disks) == 1) or anaconda.isKickstart:
root = disks[0]
else:
height = min (len (disks), 12)
if height == 12:
scroll = 1
else:
scroll = 0
devList = []
for (device, relstr, arch) 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.isKickstart:
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.isKickstart:
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.id.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.isKickstart:
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.isKickstart and \
anaconda.id.ksdata.reboot.action in [KS_REBOOT, KS_SHUTDOWN]:
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.id.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,)
ButtonChoiceWindow(screen, _("Rescue"), msgStr, [_("OK")] )
# we do not need ncurses anymore, shut them down
screen.finish()
#create /etc/fstab in ramdisk, so it is easier to work with RO mounted filesystems
makeFStab()
# run %post if we've mounted everything
if rootmounted and not readOnly and anaconda.isKickstart:
from kickstart import runPostScripts
runPostScripts(anaconda)
# start shell if reboot wasn't requested
if not anaconda.isKickstart or \
not anaconda.id.ksdata.reboot.action in [KS_REBOOT, KS_SHUTDOWN]:
runShell(screen, msgStr)
sys.exit(0)