# # 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 . # import isys, iutil import os, os.path, stat, sys from constants import * from errors import * import gettext _ = lambda x: gettext.ldgettext("anaconda", x) import logging log = logging.getLogger("anaconda") _arch = iutil.getArch() def findFirstIsoImage(path): """ Find the first iso image in path This also supports specifying a specific .iso image Returns the basename of the image """ try: flush = os.stat(path) except OSError: return None arch = _arch if os.path.isfile(path) and path.endswith(".iso"): files = [os.path.basename(path)] path = os.path.dirname(path) else: files = os.listdir(path) for fn in files: what = path + '/' + fn log.debug("Checking %s" % (what)) if not isys.isIsoImage(what): continue log.debug("mounting %s on /mnt/install/cdimage", what) try: isys.mount(what, "/mnt/install/cdimage", fstype="iso9660", readOnly=True) except SystemError: continue if not os.access("/mnt/install/cdimage/.discinfo", os.R_OK): isys.umount("/mnt/install/cdimage", removeDir=False) continue log.debug("Reading .discinfo") f = open("/mnt/install/cdimage/.discinfo") f.readline() # skip timestamp f.readline() # skip release description discArch = f.readline().strip() # read architecture f.close() log.debug("discArch = %s" % discArch) if discArch != arch: log.warning("findFirstIsoImage: architectures mismatch: %s, %s" % (discArch, arch)) isys.umount("/mnt/install/cdimage", removeDir=False) continue # If there's no repodata, there's no point in trying to # install from it. if not os.access("/mnt/install/cdimage/repodata", os.R_OK): log.warning("%s doesn't have repodata, skipping" %(what,)) isys.umount("/mnt/install/cdimage", removeDir=False) continue # warn user if images appears to be wrong size if os.stat(what)[stat.ST_SIZE] % 2048: log.warning("%s appears to be corrupted" % what) exn = InvalidImageSizeError("size is not a multiple of 2048 bytes") if errorHandler.cb(exn) == ERROR_RAISE: raise exn log.info("Found disc at %s" % fn) isys.umount("/mnt/install/cdimage", removeDir=False) return fn 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 on ISO_DIR. def mountImageDirectory(method, storage): # No need to mount it again. if os.path.ismount(ISO_DIR): return if method.method == "harddrive": if method.biospart: log.warning("biospart support is not implemented") devspec = method.biospart else: devspec = method.partition # FIXME: teach DeviceTree.resolveDevice about biospart device = storage.devicetree.resolveDevice(devspec) while True: try: device.setup() device.format.setup(mountpoint=ISO_DIR) except StorageError as e: log.error("couldn't mount ISO source directory: %s" % e) exn = MediaMountError(str(e)) if errorHandler.cb(exn) == ERROR_RAISE: raise exn elif methodstr.startswith("nfsiso:"): # XXX what if we mount it on ISO_DIR and then create a symlink # if there are no isos instead of the remount? # mount the specified directory path = method.dir if method.dir.endswith(".iso"): path = os.path.dirname(method.dir) url = "%s:%s" % (method.server, path) while True: try: isys.mount(url, ISO_DIR, options=method.options) except SystemError as e: log.error("couldn't mount ISO source directory: %s" % e) exn = MediaMountError(str(e)) if errorHandler.cb(exn) == ERROR_RAISE: raise exn def mountImage(isodir, tree): while True: if os.path.isfile(isodir): image = isodir else: image = findFirstIsoImage(isodir) if image is None: exn = MissingImageError() if errorHandler.cb(exn) == ERROR_RAISE: raise exn else: continue image = os.path.normpath("%s/%s" % (isodir, image)) try: isys.mount(image, tree, fstype = 'iso9660', readOnly = True) except SystemError: exn = MissingImageError() if errorHandler.cb(exn) == ERROR_RAISE: raise exn else: continue else: break # Return the first Device instance containing valid optical install media # for this product. def opticalInstallMedia(devicetree, mountpoint=INSTALL_TREE): retval = None for dev in devicetree.getDevicesByType("cdrom"): devicetree.updateDeviceFormat(dev) try: dev.format.mount(mountpoint=mountpoint) except Exception: continue if not verifyMedia(mountpoint): dev.format.unmount() continue dev.format.unmount() retval = dev break return retval # Return a list of Device instances that may have HDISO install media # somewhere. Candidate devices are simply any that we can mount. def potentialHdisoSources(devicetree): return filter(lambda d: d.format.exists and d.format.mountable, devicetree.getDevicesByType("partition")) def umountImage(tree): if os.path.ismount(tree): isys.umount(tree, removeDir=False) def unmountCD(dev): if not dev: return while True: try: dev.format.unmount() except Exception as e: log.error("exception in _unmountCD: %s" %(e,)) exn = MediaUnmountError() errorHandler.cb(exn, dev) else: break def verifyMedia(tree, timestamp=None): if os.access("%s/.discinfo" % tree, os.R_OK): f = open("%s/.discinfo" % tree) newStamp = f.readline().strip() descr = f.readline().strip() arch = f.readline().strip() f.close() if timestamp is not None: if newStamp == timestamp and arch == _arch: return True else: if arch == _arch: return True return False