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497 lines
17 KiB
497 lines
17 KiB
#
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# rescue.py - anaconda rescue mode setup
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#
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# Copyright (C) 2001, 2002, 2003, 2004 Red Hat, Inc. All rights reserved.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Author(s): Mike Fulbright <msf@redhat.com>
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# Jeremy Katz <katzj@redhat.com>
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#
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import upgrade
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from snack import *
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from constants import *
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from constants_text import *
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from text import WaitWindow, OkCancelWindow, ProgressWindow, PassphraseEntryWindow, stepToClasses
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from flags import flags
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import sys
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import os
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import isys
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from storage import mountExistingSystem
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from installinterfacebase import InstallInterfaceBase
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import iutil
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import shutil
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import time
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import network
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import subprocess
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import gettext
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_ = lambda x: gettext.ldgettext("anaconda", x)
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import logging
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log = logging.getLogger("anaconda")
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class RescueInterface(InstallInterfaceBase):
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def waitWindow(self, title, text):
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return WaitWindow(self.screen, title, text)
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def progressWindow(self, title, text, total):
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return ProgressWindow(self.screen, title, text, total)
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def detailedMessageWindow(self, title, text, longText=None, type="ok",
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default=None, custom_icon=None,
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custom_buttons=[]):
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return self.messageWindow(title, text, type, default, custom_icon,
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custom_buttons)
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def messageWindow(self, title, text, type = "ok", default = None,
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custom_icon=None, custom_buttons=[]):
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if type == "ok":
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ButtonChoiceWindow(self.screen, title, text,
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buttons=[TEXT_OK_BUTTON])
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elif type == "yesno":
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if default and default == "no":
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btnlist = [TEXT_NO_BUTTON, TEXT_YES_BUTTON]
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else:
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btnlist = [TEXT_YES_BUTTON, TEXT_NO_BUTTON]
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rc = ButtonChoiceWindow(self.screen, title, text,
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buttons=btnlist)
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if rc == "yes":
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return 1
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else:
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return 0
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elif type == "custom":
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tmpbut = []
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for but in custom_buttons:
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tmpbut.append(string.replace(but,"_",""))
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rc = ButtonChoiceWindow(self.screen, title, text, width=60,
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buttons=tmpbut)
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idx = 0
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for b in tmpbut:
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if string.lower(b) == rc:
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return idx
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idx = idx + 1
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return 0
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else:
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return OkCancelWindow(self.screen, title, text)
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def enableNetwork(self, anaconda):
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if len(anaconda.network.netdevices) == 0:
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return False
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from netconfig_text import NetworkConfiguratorText
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w = NetworkConfiguratorText(self.screen, anaconda)
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ret = w.run()
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return ret != INSTALL_BACK
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def passphraseEntryWindow(self, device):
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w = PassphraseEntryWindow(self.screen, device)
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(passphrase, isglobal) = w.run()
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w.pop()
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return (passphrase, isglobal)
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def resetInitializeDiskQuestion(self):
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self._initLabelAnswers = {}
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def resetReinitInconsistentLVMQuestion(self):
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self._inconsistentLVMAnswers = {}
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def questionInitializeDisk(self, path, description, size, details=""):
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# Never initialize disks in rescue mode!
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return False
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def questionReinitInconsistentLVM(self, pv_names=None, lv_name=None, vg_name=None):
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# Never reinit VG's in rescue mode!
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return False
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def shutdown (self):
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pass
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def suspend(self):
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pass
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def resume(self):
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pass
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def __init__(self, screen):
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InstallInterfaceBase.__init__(self)
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self.screen = screen
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# XXX grub-install is stupid and uses df output to figure out
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# things when installing grub. make /etc/mtab be at least
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# moderately useful.
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def makeMtab(instPath, storage):
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try:
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f = open(instPath + "/etc/mtab", "w+")
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except IOError, e:
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log.info("failed to open /etc/mtab for write: %s" % e)
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return
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try:
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f.write(storage.mtab)
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finally:
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f.close()
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def makeFStab(instPath = ""):
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if os.access("/proc/mounts", os.R_OK):
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f = open("/proc/mounts", "r")
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buf = f.read()
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f.close()
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else:
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buf = ""
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try:
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f = open(instPath + "/etc/fstab", "a")
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if buf:
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f.write(buf)
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f.close()
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except IOError, e:
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log.info("failed to write /etc/fstab: %s" % e)
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# make sure they have a resolv.conf in the chroot
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def makeResolvConf(instPath):
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if not os.access("/etc/resolv.conf", os.R_OK):
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return
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if os.access("%s/etc/resolv.conf" %(instPath,), os.R_OK):
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f = open("%s/etc/resolv.conf" %(instPath,), "r")
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buf = f.read()
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f.close()
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else:
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buf = ""
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# already have a nameserver line, don't worry about it
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if buf.find("nameserver") != -1:
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return
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f = open("/etc/resolv.conf", "r")
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buf = f.read()
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f.close()
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# no nameserver, we can't do much about it
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if buf.find("nameserver") == -1:
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return
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shutil.copyfile("%s/etc/resolv.conf" %(instPath,),
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"%s/etc/resolv.conf.bak" %(instPath,))
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f = open("%s/etc/resolv.conf" %(instPath,), "w+")
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f.write(buf)
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f.close()
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#
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# Write out something useful for networking and start interfaces
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#
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def startNetworking(network, intf):
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# do lo first
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try:
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os.system("/usr/sbin/ifconfig lo 127.0.0.1")
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except:
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log.error("Error trying to start lo in rescue.py::startNetworking()")
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# start up dhcp interfaces first
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if not network.bringUp():
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log.error("Error bringing up network interfaces")
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def runShell(screen = None, msg=""):
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if screen:
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screen.suspend()
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print
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if msg:
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print (msg)
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print(_("When finished please exit from the shell and your "
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"system will reboot."))
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print
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proc = None
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if os.path.exists("/usr/bin/firstaidkit-qs"):
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proc = subprocess.Popen(["/usr/bin/firstaidkit-qs"])
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proc.wait()
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if proc is None or proc.returncode!=0:
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if os.path.exists("/bin/bash"):
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iutil.execConsole()
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else:
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print(_("Unable to find /bin/sh to execute! Not starting shell"))
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time.sleep(5)
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if screen:
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screen.finish()
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def runRescue(anaconda):
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for file in [ "services", "protocols", "group", "joe", "man.config",
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"nsswitch.conf", "selinux", "mke2fs.conf" ]:
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try:
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os.symlink('/mnt/runtime/etc/' + file, '/etc/' + file)
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except:
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pass
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# see if they would like networking enabled
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if not network.hasActiveNetDev():
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screen = SnackScreen()
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while True:
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rc = ButtonChoiceWindow(screen, _("Setup Networking"),
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_("Do you want to start the network interfaces on "
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"this system?"), [_("Yes"), _("No")])
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if rc != string.lower(_("No")):
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anaconda.intf = RescueInterface(screen)
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if not anaconda.intf.enableNetwork(anaconda):
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anaconda.intf.messageWindow(_("No Network Available"),
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_("Unable to activate a networking device. Networking "
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"will not be available in rescue mode."))
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break
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startNetworking(anaconda.network, anaconda.intf)
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break
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else:
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break
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anaconda.intf = None
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screen.finish()
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# Early shell access with no disk access attempts
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if not anaconda.rescue_mount:
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# the %post should be responsible for mounting all needed file systems
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# NOTE: 1st script must be bash or simple python as nothing else might be available in the rescue image
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if anaconda.ksdata:
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from kickstart import runPostScripts
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runPostScripts(anaconda)
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else:
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runShell()
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sys.exit(0)
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screen = SnackScreen()
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anaconda.intf = RescueInterface(screen)
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if anaconda.ksdata:
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if anaconda.ksdata.rescue and anaconda.ksdata.rescue.romount:
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readOnly = 1
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else:
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readOnly = 0
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else:
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# prompt to see if we should try and find root filesystem and mount
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# everything in /etc/fstab on that root
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rc = ButtonChoiceWindow(screen, _("Rescue"),
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_("The rescue environment will now attempt to find your "
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"Linux installation and mount it under the directory "
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"%s. You can then make any changes required to your "
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"system. If you want to proceed with this step choose "
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"'Continue'. You can also choose to mount your file systems "
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"read-only instead of read-write by choosing 'Read-Only'."
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"\n\n"
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"If for some reason this process fails you can choose 'Skip' "
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"and this step will be skipped and you will go directly to a "
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"command shell.\n\n") % (anaconda.rootPath,),
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[_("Continue"), _("Read-Only"), _("Skip")] )
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if rc == string.lower(_("Skip")):
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runShell(screen)
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sys.exit(0)
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elif rc == string.lower(_("Read-Only")):
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readOnly = 1
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else:
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readOnly = 0
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import storage
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storage.storageInitialize(anaconda)
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disks = upgrade.findExistingRoots(anaconda, upgradeany=True)
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if not disks:
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root = None
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elif (len(disks) == 1) or anaconda.ksdata:
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root = disks[0]
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else:
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height = min (len (disks), 12)
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if height == 12:
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scroll = 1
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else:
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scroll = 0
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devList = []
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for (device, relstr) in disks:
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if getattr(device.format, "label", None):
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devList.append("%s (%s) - %s" % (device.name, device.format.label, relstr))
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else:
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devList.append("%s - %s" % (device.name, relstr))
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(button, choice) = \
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ListboxChoiceWindow(screen, _("System to Rescue"),
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_("Which device holds the root partition "
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"of your installation?"), devList,
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[ _("OK"), _("Exit") ], width = 30,
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scroll = scroll, height = height,
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help = "multipleroot")
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if button == string.lower (_("Exit")):
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root = None
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else:
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root = disks[choice]
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rootmounted = 0
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if root:
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try:
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rc = mountExistingSystem(anaconda, root,
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allowDirty = 1, warnDirty = 1,
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readOnly = readOnly)
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if rc == -1:
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if anaconda.ksdata:
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log.error("System had dirty file systems which you chose not to mount")
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else:
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ButtonChoiceWindow(screen, _("Rescue"),
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_("Your system had dirty file systems which you chose not "
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"to mount. Press return to get a shell from which "
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"you can fsck and mount your partitions. The system "
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"will reboot automatically when you exit from the "
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"shell."), [_("OK")], width = 50)
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rootmounted = 0
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else:
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if anaconda.ksdata:
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log.info("System has been mounted under: %s" % anaconda.rootPath)
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else:
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ButtonChoiceWindow(screen, _("Rescue"),
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_("Your system has been mounted under %(rootPath)s.\n\n"
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"Press <return> to get a shell. If you would like to "
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"make your system the root environment, run the command:\n\n"
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"\tchroot %(rootPath)s\n\nThe system will reboot "
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"automatically when you exit from the shell.") %
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{'rootPath': anaconda.rootPath},
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[_("OK")] )
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rootmounted = 1
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# now turn on swap
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if not readOnly:
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try:
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anaconda.storage.turnOnSwap()
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except:
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log.error("Error enabling swap")
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# and /selinux too
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if flags.selinux and os.path.isdir("%s/selinux" %(anaconda.rootPath,)):
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try:
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isys.mount("/selinux", "%s/selinux" %(anaconda.rootPath,),
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"selinuxfs")
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except Exception, e:
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log.error("error mounting selinuxfs: %s" %(e,))
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# we have to catch the possible exception
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# because we support read-only mounting
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try:
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fd = open("%s/.autorelabel" % anaconda.rootPath, "w+")
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fd.close()
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except Exception, e:
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log.warning("cannot touch /.autorelabel")
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# set a library path to use mounted fs
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libdirs = os.environ["LD_LIBRARY_PATH"].split(":")
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mounted = map(lambda dir: "/mnt/sysimage%s" % dir, libdirs)
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os.environ["LD_LIBRARY_PATH"] = ":".join(libdirs + mounted)
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# find groff data dir
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try:
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glst = os.listdir("/mnt/sysimage/usr/share/groff")
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# find a directory which is a numeral, its where
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# data files are
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gversion = None
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for gdir in glst:
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try:
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isone = 1
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for idx in range(0, len(gdir)):
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if string.find(string.digits + '.', gdir[idx]) == -1:
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isone = 0
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break
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if isone:
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gversion = gdir
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break
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except:
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gversion = None
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continue
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except:
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gversion = None
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if gversion is not None:
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gpath = "/mnt/sysimage/usr/share/groff/"+gversion
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os.environ["GROFF_FONT_PATH"] = gpath + '/font'
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os.environ["GROFF_TMAC_PATH"] = "%s:/mnt/sysimage/usr/share/groff/site-tmac" % (gpath + '/tmac',)
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# do we have bash?
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try:
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if os.access("/usr/bin/bash", os.R_OK):
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os.symlink ("/usr/bin/bash", "/bin/bash")
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except:
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pass
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except:
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# This looks horrible, but all it does is catch every exception,
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# and reraise those in the tuple check. This lets programming
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# errors raise exceptions, while any runtime error will
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# still result in a shell
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(exc, val) = sys.exc_info()[0:2]
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log.error(str(exc)+": "+str(val))
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if exc in (IndexError, ValueError, SyntaxError):
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raise exc, val, sys.exc_info()[2]
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if anaconda.ksdata:
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log.error("An error occurred trying to mount some or all of your system")
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else:
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ButtonChoiceWindow(screen, _("Rescue"),
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_("An error occurred trying to mount some or all of your "
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"system. Some of it may be mounted under %s.\n\n"
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"Press <return> to get a shell. The system will reboot "
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"automatically when you exit from the shell.") % (anaconda.rootPath,),
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[_("OK")] )
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else:
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if anaconda.ksdata:
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log.info("No Linux partitions found")
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screen.finish()
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print(_("You don't have any Linux partitions. Rebooting.\n"))
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sys.exit(0)
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else:
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ButtonChoiceWindow(screen, _("Rescue Mode"),
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_("You don't have any Linux partitions. Press "
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"return to get a shell. The system will reboot "
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"automatically when you exit from the shell."),
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[ _("OK") ], width = 50)
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msgStr = ""
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if rootmounted and not readOnly:
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makeMtab(anaconda.rootPath, anaconda.storage)
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try:
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makeResolvConf(anaconda.rootPath)
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except Exception, e:
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log.error("error making a resolv.conf: %s" %(e,))
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msgStr = _("Your system is mounted under the %s directory.") % (anaconda.rootPath,)
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#create /etc/fstab in ramdisk, so it is easier to work with RO mounted filesystems
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makeFStab()
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# run %post if we've mounted everything
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if anaconda.ksdata:
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from kickstart import runPostScripts
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runPostScripts(anaconda)
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else:
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runShell(screen, msgStr)
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sys.exit(0)
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