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#
# image.py: Support methods for CD/DVD and ISO image installations.
#
# Copyright (C) 2007 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 <http://www.gnu.org/licenses/>.
#
import isys, iutil
import os, os.path, stat, string, sys
from constants import *
import gettext
_ = lambda x: gettext.ldgettext("anaconda", x)
import logging
log = logging.getLogger("anaconda")
_arch = iutil.getArch()
def findFirstIsoImage(path, messageWindow):
flush = os.stat(path)
files = os.listdir(path)
arch = _arch
for file in files:
what = path + '/' + file
log.debug("Checking %s" % (what))
if not isys.isIsoImage(what):
continue
try:
log.debug("mounting %s on /mnt/cdimage", what)
isys.mount(what, "/mnt/cdimage", fstype = "iso9660", readOnly = True)
if os.access("/mnt/cdimage/.discinfo", os.R_OK):
log.debug("Reading .discinfo")
f = open("/mnt/cdimage/.discinfo")
try:
f.readline() # skip timestamp
f.readline() # skip release description
discArch = string.strip(f.readline()) # read architecture
except:
discArch = None
f.close()
log.debug("discArch = %s" % discArch)
if discArch != arch:
isys.umount("/mnt/cdimage", removeDir=False)
continue
# If there's no repodata, there's no point in trying to
# install from it.
if not os.access("/mnt/cdimage/repodata", os.R_OK):
log.warning("%s doesn't have repodata, skipping" %(what,))
isys.umount("/mnt/cdimage", removeDir=False)
continue
# warn user if images appears to be wrong size
if os.stat(what)[stat.ST_SIZE] % 2048:
rc = messageWindow(_("Warning"),
_("The ISO image %s has a size which is not "
"a multiple of 2048 bytes. This may mean "
"it was corrupted on transfer to this computer."
"\n\n"
"It is recommended that you exit and abort your "
"installation, but you can choose to continue if "
"you think this is in error.") % (file,),
type="custom", custom_icon="warning",
custom_buttons= [_("_Exit installer"),
_("_Continue")])
if rc == 0:
sys.exit(0)
log.info("Found disc at %s" % file)
isys.umount("/mnt/cdimage", removeDir=False)
return file
except SystemError:
pass
return None
def getMediaId(path):
if os.access("%s/.discinfo" % path, os.R_OK):
f = open("%s/.discinfo" % path)
newStamp = f.readline().strip()
f.close()
return newStamp
else:
return None
# This mounts the directory containing the iso images, and places the
# mount point in /mnt/isodir.
def mountDirectory(methodstr, messageWindow):
if methodstr.startswith("hd:"):
method = methodstr[3:]
options = ''
if method.count(":") == 1:
(device, path) = method.split(":")
fstype = "auto"
else:
(device, fstype, path) = method.split(":")
if not device.startswith("/dev/") and not device.startswith("UUID=") \
and not device.startswith("LABEL="):
device = "/dev/%s" % device
elif methodstr.startswith("nfsiso:"):
(options, host, path) = iutil.parseNfsUrl(methodstr)
device = "%s:%s" % (host, path)
fstype = "nfs"
else:
return
# No need to mount it again.
if os.path.ismount("/mnt/isodir"):
return
while True:
try:
isys.mount(device, "/mnt/isodir", fstype=fstype, options=options)
break
except SystemError, msg:
log.error("couldn't mount ISO source directory: %s" % msg)
ans = messageWindow(_("Couldn't Mount ISO Source"),
_("An error occurred mounting the source "
"device %s. This may happen if your ISO "
"images are located on an advanced storage "
"device like LVM or RAID, or if there was a "
"problem mounting a partition. Click exit "
"to abort the installation.")
% (device,), type="custom", custom_icon="error",
custom_buttons=[_("_Exit"), _("_Retry")])
if ans == 0:
sys.exit(0)
else:
continue
def mountImage(isodir, tree, messageWindow):
if os.path.ismount(tree):
raise SystemError, "trying to mount already-mounted iso image!"
image = findFirstIsoImage(isodir, messageWindow)
while True:
try:
isoImage = "%s/%s" % (isodir, image)
isys.mount(isoImage, tree, fstype = 'iso9660', readOnly = True)
break
except:
ans = messageWindow(_("Missing ISO 9660 Image"),
_("The installer has tried to mount the "
"installation image, but cannot find it on "
"the hard drive.\n\n"
"Please copy this image to the "
"drive and click Retry. Click Exit "
"to abort the installation."),
type="custom",
custom_icon="warning",
custom_buttons=[_("_Exit"), _("_Retry")])
if ans == 0:
sys.exit(0)
elif ans == 1:
image = findFirstIsoImage(isodir, messageWindow)
# Find an attached CD/DVD drive with media in it that contains packages,
# and return that device name.
def scanForMedia(tree, storage):
for dev in storage.devicetree.devices:
if dev.type != "cdrom":
continue
storage.devicetree.updateDeviceFormat(dev)
try:
dev.format.mount(mountpoint=tree)
except:
continue
if not verifyMedia(tree):
dev.format.unmount()
continue
return dev.name
return None
def umountImage(tree):
isys.umount(tree, removeDir=False)
def unmountCD(dev, messageWindow):
if not dev:
return
while True:
try:
dev.format.unmount()
break
except Exception, e:
log.error("exception in _unmountCD: %s" %(e,))
messageWindow(_("Error"),
_("An error occurred unmounting the disc. "
"Please make sure you're not accessing "
"%s from the shell on tty2 "
"and then click OK to retry.")
% (dev.path,))
def verifyMedia(tree, timestamp=None):
if os.access("%s/.discinfo" % tree, os.R_OK):
f = open("%s/.discinfo" % tree)
newStamp = f.readline().strip()
try:
descr = f.readline().strip()
except:
descr = None
try:
arch = f.readline().strip()
except:
arch = None
f.close()
if timestamp is not None:
if newStamp == timestamp and arch == _arch:
return True
else:
if arch == _arch:
return True
return False
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