1c7ec96ed9
If this switch is provided, kernel-switcher tries to look for reverse dependencies of the currently running kernel (uname -r) during the selection of external package modules that require to be installed for the new kernel.
337 lines
11 KiB
Python
Executable File
337 lines
11 KiB
Python
Executable File
#!/usr/bin/python2
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import sys
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sys.path.insert(0, '/usr/lib/entropy/lib')
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sys.path.insert(0, '/usr/lib/entropy/server')
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sys.path.insert(0, '/usr/lib/entropy/client')
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sys.path.insert(0, '../lib')
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sys.path.insert(0, '../server')
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sys.path.insert(0, '../client')
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import os
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import subprocess
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import errno
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import codecs
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from entropy.const import etpUi, etpConst, const_convert_to_unicode, \
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const_convert_to_rawstring
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from entropy.output import teal, purple, darkgreen, blue, brown, print_info, \
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red, nocolor, print_warning, print_error
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from entropy.exceptions import DependenciesNotRemovable
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from entropy.i18n import _
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from entropy.client.interfaces import Client
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from entropy.cli import print_package_info
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import entropy.dep
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import entropy.tools
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# equo modules
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from text_ui import install_packages
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APP_NAME = os.path.basename(sys.argv[0])
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KERNEL_BINARY_VIRTUAL = const_convert_to_unicode("virtual/linux-binary")
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KERNELS_DIR = const_convert_to_rawstring("/etc/kernels")
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RELEASE_LEVEL = const_convert_to_rawstring("RELEASE_LEVEL")
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def _get_kernels(etp_client):
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matches, x_rc = etp_client.atom_match(KERNEL_BINARY_VIRTUAL,
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multi_match = True, multi_repo = True)
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return matches, x_rc
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def _remove_tag_from_slot(slot):
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if not hasattr(entropy.dep, "remove_tag_from_slot"):
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# backward compatibility
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return slot[::-1].split(",", 1)[-1][::-1]
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return entropy.dep.remove_tag_from_slot(slot)
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def _get_target_tag(etp_client, kernel_match):
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try:
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matches = etp_client.get_reverse_queue([kernel_match],
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recursive = False)
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except DependenciesNotRemovable:
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# wtf should not happen
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raise
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tags = set()
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for pkg_id, pkg_repo in matches:
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tag = etp_client.open_repository(pkg_repo).retrieveTag(pkg_id)
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if tag:
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tags.add(tag)
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if tags:
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tags = sorted(tags, reverse = True)
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return tags.pop(0)
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def _setup_kernel_symlink(target_tag):
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eselect_exec = "/usr/bin/eselect"
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if os.access(eselect_exec, os.X_OK):
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subprocess.call((eselect_exec, "kernel", "set", target_tag))
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def _guess_kernel_name(kernel_atom):
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"""
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This method takes advantage of Entropy kernel package info files available
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at /etc/kernels/<pkg-name>-<pkg-ver>/ directory.
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This function tries to read uname -r from the RELEASE_LEVEL file.
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"""
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namever = entropy.dep.remove_cat(kernel_atom)
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kernel_meta_file = os.path.join(KERNELS_DIR, namever, RELEASE_LEVEL)
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if os.path.isfile(kernel_meta_file):
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try:
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with open(kernel_meta_file, "r") as km_f:
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kernel_name = km_f.readline().strip()
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if kernel_name:
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return kernel_name
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except (OSError, IOError):
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return None
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def _guess_kernel_package_file(release_level):
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"""
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This method takes advantage of Entropy kernel package info files available
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at /etc/kernels/<pkg-name>-<pkg-ver>/ directory looking for
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a RELEASE_LEVEL file whose content matches release_level (uname -r).
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"""
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if not os.path.isdir(KERNELS_DIR):
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return None
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subs = []
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for curdir, _subs, files in os.walk(KERNELS_DIR):
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subs.extend(_subs)
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for sub in subs:
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sub_path = os.path.join(KERNELS_DIR, sub)
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try:
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dir_list = os.listdir(sub_path)
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except OSError as err:
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if err.errno != errno.ENOENT:
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raise
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continue
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if RELEASE_LEVEL not in dir_list:
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continue
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level_path = os.path.join(
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sub_path, RELEASE_LEVEL)
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with codecs.open(
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level_path, "r", etpConst['conf_raw_encoding']) as rel_f:
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rel_line = rel_f.readline().strip()
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if release_level == rel_line:
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return const_convert_to_unicode(level_path)
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# removing and installing proprietary drivers might reset the selected
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# OpenGL implementation
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def _get_opengl_impl():
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eselect_exec = "/usr/bin/eselect"
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sts = 1
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out = "xorg-x11"
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if os.access(eselect_exec, os.X_OK) and not etpUi['pretend']:
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sts, xout = entropy.tools.getstatusoutput("%s opengl show" % (
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eselect_exec,))
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if sts == 0:
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out = xout
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return out
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def _set_opengl_impl(opengl):
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eselect_exec = "/usr/bin/eselect"
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if os.access(eselect_exec, os.X_OK):
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args = (eselect_exec, "opengl", "set", opengl)
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subprocess.call(args)
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def _show_kernel_warnings(kernel_atom):
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print_info("%s %s" % (purple(kernel_atom), teal(_("has been installed."))))
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print_warning("%s: %s" % (red(_("Attention")),
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brown(_("some external drivers cannot work across multiple kernels."))))
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print_warning(darkgreen(_("Please reboot your computer now !")))
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def _switch_kernel(args):
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if not args:
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print_error(brown(_("No kernel packages given")))
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return 1
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from_running = "--from-running" in args
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if from_running:
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args.remove("--from-running")
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if len(args) > 1:
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print_error(brown(_("More than one kernel package given")))
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return 1
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kernel_package = args.pop(0)
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etp_client = None
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acquired = False
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try:
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etp_client = Client()
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acquired = entropy.tools.acquire_entropy_locks(etp_client)
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if not acquired:
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print_error(brown(_("Another Entropy is currently running.")))
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return 1
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pkg_id, pkg_repo = etp_client.atom_match(kernel_package)
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if pkg_id == -1:
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print_error("%s: %s" % (brown(_("Package does not exist")),
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teal(kernel_package),))
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return 1
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kernel_matches, rc = _get_kernels(etp_client)
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kernel_match = (pkg_id, pkg_repo)
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if kernel_match not in kernel_matches:
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print_error("%s: %s" % (brown(_("Not a kernel")),
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teal(kernel_package),))
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return 1
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kernel_atom = etp_client.open_repository(pkg_repo).retrieveAtom(pkg_id)
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# this can be None !
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target_tag = _get_target_tag(etp_client, kernel_match)
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inst_repo = etp_client.installed_repository()
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# try to look for the currently running kernel first if
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# --from-running is specified (use uname -r)
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latest_kernel = -1
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k_rc = 1
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if from_running:
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try:
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uname_r = os.uname()[2]
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except OSError:
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uname_r = None
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except IndexError:
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uname_r = None
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pkg_file = None
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if uname_r is not None:
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pkg_file = _guess_kernel_package_file(uname_r)
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if pkg_file is not None:
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_pkg_ids = list(inst_repo.searchBelongs(pkg_file))
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# if more than one, get the latest
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_pkg_ids.sort(reverse=True)
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if _pkg_ids:
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latest_kernel = _pkg_ids[0]
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if latest_kernel == -1:
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print_error(
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brown(_("Cannot find your currently running kernel.")))
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print_error(
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brown(_("Try without --from-running.")))
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return 1
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if latest_kernel == -1:
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latest_kernel, k_rc = inst_repo.atomMatch(
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KERNEL_BINARY_VIRTUAL)
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installed_revdeps = []
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if (latest_kernel != -1) and target_tag:
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installed_revdeps = etp_client.get_removal_queue(
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[latest_kernel], recursive = False)
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# only pull in packages that are installed at this time.
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def _installed_pkgs_translator(inst_pkg_id):
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if inst_pkg_id == latest_kernel:
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# will be added later
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return None
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key, slot = inst_repo.retrieveKeySlot(inst_pkg_id)
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target_slot = _remove_tag_from_slot(slot) + "," + target_tag
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pkg_id, pkg_repo = etp_client.atom_match(key,
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match_slot = target_slot)
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if pkg_id == -1:
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return None
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return pkg_id, pkg_repo
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matches = map(_installed_pkgs_translator, installed_revdeps)
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matches = [x for x in matches if x is not None]
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matches.append(kernel_match)
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opengl = _get_opengl_impl()
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rc, other = install_packages(
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etp_client,
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atomsdata = matches,
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check_critical_updates = False
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)
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if (rc == 0) and (not etpUi['pretend']):
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_set_opengl_impl(opengl)
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if target_tag:
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# if target_tag is None, we are unable to set the symlink
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_setup_kernel_symlink(target_tag)
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else:
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# try to guess, sigh, for now
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guessed_kernel_name = _guess_kernel_name(kernel_atom)
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if guessed_kernel_name:
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_setup_kernel_symlink(guessed_kernel_name)
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_show_kernel_warnings(kernel_atom)
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return rc
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finally:
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if acquired and (etp_client is not None):
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entropy.tools.release_entropy_locks(etp_client)
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if etp_client is not None:
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etp_client.shutdown()
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def _list_kernels(args):
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etp_client = None
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acquired = False
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try:
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etp_client = Client()
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acquired = entropy.tools.acquire_entropy_locks(etp_client)
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if not acquired:
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print_error(brown(_("Another Entropy is currently running.")))
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return 1
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matches, rc = _get_kernels(etp_client)
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if (rc != 0) or (not matches):
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print_warning(_("No kernel packages found"))
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return 1
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key_sorter = lambda x: \
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etp_client.open_repository(x[1]).retrieveAtom(x[0])
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for pkg_id, pkg_repo in sorted(matches, key = key_sorter):
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repo = etp_client.open_repository(pkg_repo)
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print_package_info(pkg_id, etp_client, repo,
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show_repo_if_quiet = True, extended = etpUi['verbose'],
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quiet = etpUi['quiet'])
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return 0
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finally:
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if acquired and (etp_client is not None):
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entropy.tools.release_entropy_locks(etp_client)
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if etp_client is not None:
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etp_client.shutdown()
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def _print_help(args):
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print_info("%s - %s" % (blue(APP_NAME),
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teal(_("Sabayon Linux Kernel Switcher")),))
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print_info(" %s:\t%s %s" % (purple(_("switch kernel")),
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brown(APP_NAME), darkgreen("switch <kernel package> [--from-running]")))
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print_info(" %s:\t%s %s" % (purple(_("list kernels")), brown(APP_NAME),
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darkgreen("list"),))
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print_info(" %s:\t\t%s %s" % (purple(_("this help")), brown(APP_NAME),
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darkgreen("help")))
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if not args:
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return 1
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return 0
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args_map = {
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'switch': _switch_kernel,
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'list': _list_kernels,
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'help': _print_help,
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'__fallback__': _print_help,
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}
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argv = sys.argv[1:]
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argv = []
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for arg in sys.argv[1:]:
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if arg == "--nocolor":
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nocolor()
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elif arg in ("--quiet", "-q"):
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etpUi['quiet'] = True
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elif arg in ("--verbose", "-v"):
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etpUi['verbose'] = True
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elif arg in ("--pretend", "-p"):
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etpUi['pretend'] = True
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elif arg in ("--ask", "-a"):
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etpUi['ask'] = True
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else:
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argv.append(arg)
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if not argv:
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argv.append("help")
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cmd, args = argv[0], argv[1:]
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func = args_map.get(cmd, args_map.get("__fallback__"))
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try:
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rc = func(args)
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except KeyboardInterrupt:
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raise SystemExit(1)
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raise SystemExit(rc)
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