#
# rescue.py - anaconda rescue mode setup
#
# Mike Fulbright <msf@redhat.com>
#
# Copyright 2001-2003 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 kudzu
import upgrade
from snack import *
from constants_text import *
from text import WaitWindow, OkCancelWindow, ProgressWindow
import sys
import os
import isys
import iutil
import fsset
from rhpl.log import log
from rhpl.translate import _
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()
sys.exit(0)
# 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):
# do lo first
try:
os.system("/usr/bin/ifconfig lo 127.0.0.1")
except:
log("Error trying to start lo in rescue.py::startNetworking()")
# start up dhcp interfaces first
dhcpGotNS = 0
for devname in network.netdevices:
dev = network.netdevices[devname]
log("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 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 trying to start %s in rescue.py::startNetworking()", dev.get('device'))
# 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" ]:
os.symlink('/mnt/runtime/etc/' + file, '/etc/' + file)
# see if they would like networking enabled
if not methodUsesNetworking(id.methodstr):
import network_text
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)
window = network_text.NetworkWindow()
rc = apply(window, (screen, id.network, intf, 1))
if rc == INSTALL_OK:
startNetworking(id.network)
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()
# 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"),
#CJS TJD getting the red out
# _("The rescue environment will now attempt to find your Red Hat "
_("The rescue environment will now attempt to find your Fermi "
"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)
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 enabling swap")
# set a library path to use mounted fs
os.environ["LD_LIBRARY_PATH"] = "/lib:/usr/lib:/usr/X11R6/lib:/usr/kerberos/lib:/mnt/usr/lib:/mnt/sysimage/lib:/mnt/sysimage/usr/lib:/mnt/sysimage/usr/kerberos/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)
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)