Attachment 4207 Details for Bug 25981

grub.cfg → menu.lst

univention-grub-generate-menu-lst2 (text/plain), 4.52 KB, created by Philipp Hahn on 2012-02-21 19:56 CET

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Creator: Philipp Hahn

Created: 2012-02-21 19:56 CET

Size: 4.52 KB

patch

obsolete

>#!/usr/bin/python2.6
># -*- coding: utf-8 -*-
>#
># Univention Grub menu.lst generator
>#
># Copyright 2012 Univention GmbH
>#
># http://www.univention.de/
>#
># All rights reserved.
>#
># The source code of this program is made available
># under the terms of the GNU Affero General Public License version 3
># (GNU AGPL V3) as published by the Free Software Foundation.
>#
># Binary versions of this program provided by Univention to you as
># well as other copyrighted, protected or trademarked materials like
># Logos, graphics, fonts, specific documentations and configurations,
># cryptographic keys etc. are subject to a license agreement between
># you and Univention and not subject to the GNU AGPL V3.
>#
># In the case you use this program under the terms of the GNU AGPL V3,
># the program is provided 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 Affero General Public License for more details.
>#
># You should have received a copy of the GNU Affero General Public
># License with the Debian GNU/Linux or Univention distribution in file
># /usr/share/common-licenses/AGPL-3; if not, see
># <http://www.gnu.org/licenses/>.
>
>import os
>import sys
>import re
>import optparse
>from shutil import copyfile
>import univention.config_registry as ucr
>
>configRegistry = ucr.ConfigRegistry()
>configRegistry.load()
>
>parser = optparse.OptionParser()
>parser.add_option("-f", "--force", action="store_true",
>		dest="force", default=False, help="Force writing menu.lst")
>parser.add_option("-n", "--dry-run", action="store_true",
>		dest="dry", default=False, help="Print to stdout instead of menu.lst")
>parser.add_option("-c", "--commandline", "--append", action="store",
>		dest="args", default='nosplash', help="Additional kernel command line arguments")
>parser.add_option("-r", "--root", action="store",
>		dest="root", default=None, help="Overwrite grub root device")
>options, args = parser.parse_args()
>
>if configRegistry.is_false('grub/generate-menu-lst', False):
>	print >>sys.stderr, "Disables via grub/generate-menu-lst"
>	if options.force:
>		print >>sys.stderr, "Forced!"
>	else:
>		sys.exit(0)
>
>os.chdir("/boot")
>if os.path.exists("grub/menu.lst"):
>	f = open("grub/menu.lst", "r")
>	for line in f:
>		if "auto-generated through univention-grub-generate-menu-lst" in line:
>			break
>	else:
>		print >>sys.stderr, "menu.lst already exists. This typically happens if you have updated from UCS 2.4"
>		print >>sys.stderr, "and haven't converted from chain loading"
>		if options.force:
>			print >>sys.stderr, "Forced!"
>		else:
>			sys.exit(0)
>
>try:
>	grub2 = open("grub/grub.cfg", "r")
>except OSError, e:
>	print >>sys.stderr, "Failed to open grub.cfg: %s" % (e,)
>	sys.exit(1)
>
>print >>sys.stderr, "Generating legacy menu.lst from grub.cfg"
>
>if os.path.exists("grub/menu.lst"):
>	if options.dry:
>		print >>sys.stderr, "Skip moving!"
>	else:
>		copyfile("grub/menu.lst", "grub/menu.lst.bak")
>
>if options.dry:
>	out = sys.stdout
>else:
>	out = open("grub/menu.lst", "w")
>print >>out, "# This Grub configuration is auto-generated through univention-grub-generate-menu-lst."
>print >>out, "# It is used when booting UCS 3.0 as a Xen DomU with an older version of PyGrub."
>print >>out, ""
>print >>out, "default 0"
>print >>out, "timeout %s" % configRegistry.get("grub/timeout", "5")
>print >>out, ""
>
>name = kernel = initrd = None
>root = options.root
>kernels = []
>
>RE_MENUENTRY = re.compile(r"^menuentry '([^']*)' .*")
>RE_ROOT = re.compile(r"^\s+set\s+root='\((hd[0-9]+|/dev/\w+d[a-z]),msdos([0-9]+)\)'")
>RE_LINUX = re.compile(r"^\s+linux\s+(.+)")
>RE_INITRD = re.compile(r"^\s+initrd\s+(.+)")
>RE_CLOSE = re.compile(r"^}")
>
>for line in grub2:
>	m = RE_MENUENTRY.match(line)
>	if m:
>		(name,) = m.groups()
>		continue
>
>	m = RE_ROOT.match(line)
>	if m and not options.root:
>		device, part = m.groups()
>		if device.startswith('hd'):
>			root = "(%s,%d)" % (device, int(part) - 1)
>		elif device.startswith('/dev/'):
>			root = "(hd%d,%d)" % (ord(device[-1]) - ord('a'), int(part) - 1)
>		else:
>			print >>sys.stderr, "Unhandled root=%s" % (line,)
>		continue
>
>	m = RE_LINUX.match(line)
>	if m:
>		(kernel,) = m.groups()
>		continue
>
>	m = RE_INITRD.match(line)
>	if m:
>		(initrd,) = m.groups()
>		continue
>
>	m = RE_CLOSE.match(line)
>	if m:
>		if name and root and kernel:
>			print >>out, "title  %s" % (name,)
>			print >>out, "root   %s" % (root,)
>			print >>out, "kernel %s %s" % (kernel, options.args)
>			if initrd:
>				print >>out, "initrd %s" % (initrd,)
>			print >>out, ""
>		name = root = kernel = initrd = None
>		root = options.root
>		continue
>
>grub2.close()
>out.close()

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Attachments on bug 25981: 4206 | 4207