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#
# rescue.py - anaconda rescue mode setup
#
# Mike Fulbright <msf@redhat.com>
#
# Copyright 2001 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
from translate import _
import sys
import os
from log import log
import isys
import fsset
class RescueInterface:
def waitWindow(self, title, text):
return WaitWindow(self.screen, title, text)
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):
isys.chroot(instPath)
f = open("/etc/mtab", "w+")
f.write(theFsset.mtab())
f.close()
sys.exit(0)
def runRescue(instPath, mountroot, id):
for file in [ "services", "protocols", "group" ]:
os.symlink('/mnt/runtime/etc/' + file, '/etc/' + file)
if (not mountroot):
print
print _("When finished please exit from the shell and your "
"system will reboot.")
print
os.execv("/bin/sh", [ "-/bin/sh" ])
# lets create some devices
for drive in isys.hardDriveDict().keys():
isys.makeDevInode(drive, "/dev/" + drive)
for i in range(16):
if drive [:3] == "rd/" or drive [:4] == "ida/" or drive [:6] == "cciss/":
dev = drive + 'p' + str (i + 1)
else:
dev = drive + str (i + 1)
isys.makeDevInode(dev, "/dev/" + dev)
# 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 Red Hat "
"Linux installation and mount it under the directory "
"/mnt/sysimage. 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 filesystems "
"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"),
[_("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) 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()
rc = upgrade.mountRootPartition(intf, root, fs, instPath,
allowDirty = 1, warnDirty = 1,
readOnly = readOnly)
if rc == -1:
ButtonChoiceWindow(screen, _("Rescue"),
_("Your system had dirty filesystems 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 /mnt/sysimage.\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 /mnt/sysimage\n\nThe system will reboot "
"automatically when you exit from the shell."),
[_("OK")] )
rootmounted = 1
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 occured trying to mount some or all of your "
"system. Some of it may be mounted under /mnt/sysimage.\n\n"
"Press <return> to get a shell. The system will reboot "
"automatically when you exit from the shell."),
[_("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("/mnt/sysimage", fs)
print _("Your system is mounted under the /mnt/sysimage directory.")
print
print _("When finished please exit from the shell and your "
"system will reboot.")
print
os.execv("/bin/sh", [ "-/bin/sh" ])
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