/usr/lib/xen-4.6/bin/pygrub is in xen-utils-4.6 4.6.0-1ubuntu4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
# pygrub - simple python-based bootloader for Xen
#
# Copyright 2005-2006 Red Hat, Inc.
# Jeremy Katz <katzj@redhat.com>
#
# This software may be freely redistributed under the terms of the GNU
# general public license.
#
# 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 os, sys, string, struct, tempfile, re, traceback, stat, errno
import copy
import logging
import platform
import curses, _curses, curses.wrapper, curses.textpad, curses.ascii
import getopt
sys.path.insert(1, sys.path[0] + '/../lib/python')
import fsimage
import grub.GrubConf
import grub.LiloConf
import grub.ExtLinuxConf
PYGRUB_VER = 0.6
FS_READ_MAX = 1024 * 1024
SECTOR_SIZE = 512
def read_size_roundup(fd, size):
if platform.system() != 'FreeBSD':
return size
st = os.fstat(fd)
if (not stat.S_ISCHR(st.st_mode)):
return size
# Round up to sector size if it's a raw character device
return (((size)+((SECTOR_SIZE)-1))&(~((SECTOR_SIZE)-1)))
def enable_cursor(ison):
if ison:
val = 2
else:
val = 0
try:
curses.curs_set(val)
except _curses.error:
pass
DISK_TYPE_RAW, DISK_TYPE_HYBRIDISO, DISK_TYPE_DOS = range(3)
def identify_disk_image(file):
"""Detect DOS partition table or HybridISO format."""
fd = os.open(file, os.O_RDONLY)
buf = os.read(fd, read_size_roundup(fd, 0x8006))
os.close(fd)
if len(buf) >= 512 and \
struct.unpack("H", buf[0x1fe: 0x200]) == (0xaa55,):
# HybridISO contains a DOS partition table for booting from USB devices, but really is an ISO image
if len(buf) >= 0x8006 and buf[0x8001:0x8006] == 'CD001':
return DISK_TYPE_HYBRIDISO
return DISK_TYPE_DOS
return DISK_TYPE_RAW
DK_LABEL_LOC=1
DKL_MAGIC=0xdabe
V_ROOT=0x2
def get_solaris_slice(file, offset):
"""Find the root slice in a Solaris VTOC."""
fd = os.open(file, os.O_RDONLY)
os.lseek(fd, offset + (DK_LABEL_LOC * SECTOR_SIZE), 0)
buf = os.read(fd, 512)
os.close(fd)
if struct.unpack("<H", buf[508:510])[0] != DKL_MAGIC:
raise RuntimeError, "Invalid disklabel magic"
nslices = struct.unpack("<H", buf[30:32])[0]
for i in range(nslices):
sliceoff = 72 + 12 * i
slicetag = struct.unpack("<H", buf[sliceoff:sliceoff+2])[0]
slicesect = struct.unpack("<L", buf[sliceoff+4:sliceoff+8])[0]
if slicetag == V_ROOT:
return slicesect * SECTOR_SIZE
raise RuntimeError, "No root slice found"
def get_fs_offset_gpt(file):
fd = os.open(file, os.O_RDONLY)
os.lseek(fd, SECTOR_SIZE, 0)
buf = os.read(fd, 512)
partcount = struct.unpack("<L", buf[80:84])[0]
partsize = struct.unpack("<L", buf[84:88])[0]
i = partcount
offsets = []
while i>0:
buf = os.read(fd, read_size_roundup(fd, partsize))
offsets.append(struct.unpack("<Q", buf[32:40])[0] * SECTOR_SIZE)
i -= 1
os.close(fd)
return offsets
FDISK_PART_SOLARIS=0xbf
FDISK_PART_SOLARIS_OLD=0x82
FDISK_PART_GPT=0xee
def get_partition_offsets(file):
image_type = identify_disk_image(file)
if image_type == DISK_TYPE_RAW:
# No MBR: assume whole disk filesystem, which is like a
# single partition starting at 0
return [0]
elif image_type == DISK_TYPE_HYBRIDISO:
# A HybridISO contains an ISO filesystem at 0 in addition
# to the DOS partition table
part_offs = [0]
elif image_type == DISK_TYPE_DOS:
part_offs = []
else:
raise ValueError('Unhandled image type returnd by identify_disk_image(): %d' % (image_type,))
fd = os.open(file, os.O_RDONLY)
buf = os.read(fd, 512)
os.close(fd)
for poff in (446, 462, 478, 494): # partition offsets
# MBR contains a 16 byte descriptor per partition
partbuf = buf[poff:poff+16]
offset = struct.unpack("<L", partbuf[8:12])[0] * SECTOR_SIZE
type = struct.unpack("<B", partbuf[4:5])[0]
# offset == 0 implies this partition is not enabled
if offset == 0:
continue
if type == FDISK_PART_SOLARIS or type == FDISK_PART_SOLARIS_OLD:
try:
offset += get_solaris_slice(file, offset)
except RuntimeError:
continue # no solaris magic at that offset, ignore partition
if type == FDISK_PART_GPT:
for offset in get_fs_offset_gpt(file):
part_offs.append(offset)
break
# Active partition has 0x80 as the first byte.
# If active, prepend to front of list, otherwise append to back.
if struct.unpack("<c", buf[poff:poff+1]) == ('\x80',):
part_offs.insert(0, offset)
else:
part_offs.append(offset)
return part_offs
class GrubLineEditor(curses.textpad.Textbox):
def __init__(self, screen, startx, starty, line = ""):
screen.addstr(startx, starty, "> ")
screen.noutrefresh()
win = curses.newwin(1, 74, startx, starty + 2)
curses.textpad.Textbox.__init__(self, win)
self.line = list(line)
self.pos = len(line)
self.cancelled = False
self.show_text()
def show_text(self):
"""Show the text. One of our advantages over standard textboxes
is that we can handle lines longer than the window."""
self.win.erase()
p = self.pos
off = 0
while p > 70:
p -= 55
off += 55
l = self.line[off:off+70]
self.win.addstr(0, 0, string.join(l, ("")))
if self.pos > 70:
self.win.addch(0, 0, curses.ACS_LARROW)
self.win.move(0, p)
def do_command(self, ch):
# we handle escape as well as moving the line around, so have
# to override some of the default handling
self.lastcmd = ch
if ch == 27: # esc
self.cancelled = True
return 0
elif curses.ascii.isprint(ch):
self.line.insert(self.pos, chr(ch))
self.pos += 1
elif ch == curses.ascii.SOH: # ^a
self.pos = 0
elif ch in (curses.ascii.STX,curses.KEY_LEFT):
if self.pos > 0:
self.pos -= 1
elif ch in (curses.ascii.BS,curses.KEY_BACKSPACE):
if self.pos > 0:
self.pos -= 1
if self.pos < len(self.line):
self.line.pop(self.pos)
elif ch == curses.ascii.EOT: # ^d
if self.pos < len(self.line):
self.line.pop(self.pos)
elif ch == curses.ascii.ENQ: # ^e
self.pos = len(self.line)
elif ch in (curses.ascii.ACK, curses.KEY_RIGHT):
if self.pos < len(self.line):
self.pos +=1
elif ch == curses.ascii.VT: # ^k
self.line = self.line[:self.pos]
else:
return curses.textpad.Textbox.do_command(self, ch)
self.show_text()
return 1
def edit(self):
curses.doupdate()
r = curses.textpad.Textbox.edit(self)
if self.cancelled:
return None
return string.join(self.line, "")
class Grub:
ENTRY_WIN_LINES = 8
def __init__(self, file, fs = None):
self.screen = None
self.entry_win = None
self.text_win = None
if file:
self.read_config(file, fs)
def draw_main_windows(self):
if self.screen is None: #only init stuff once
self.screen = curses.initscr()
self.screen.timeout(1000)
if hasattr(curses, 'use_default_colors'):
try:
curses.use_default_colors()
except:
pass # Not important if we can't use colour
enable_cursor(False)
self.entry_win = curses.newwin(Grub.ENTRY_WIN_LINES + 2, 74, 2, 1)
self.text_win = curses.newwin(10, 70, 12, 5)
curses.def_prog_mode()
curses.reset_prog_mode()
self.screen.erase()
# create basic grub screen with a box of entries and a textbox
self.screen.addstr(1, 4, "pyGRUB version %s" %(PYGRUB_VER,))
self.entry_win.box()
self.screen.noutrefresh()
def fill_entry_list(self):
self.entry_win.erase()
self.entry_win.box()
maxy = self.entry_win.getmaxyx()[0]-3 # maxy - 2 for the frame + index
if self.selected_image > self.start_image + maxy:
self.start_image = self.selected_image
if self.selected_image < self.start_image:
self.start_image = self.selected_image
for y in range(self.start_image, len(self.cf.images)):
i = self.cf.images[y]
if y > self.start_image + maxy:
break
if y == self.selected_image:
self.entry_win.attron(curses.A_REVERSE)
self.entry_win.addstr(y + 1 - self.start_image, 2, i.title.expandtabs().ljust(70))
if y == self.selected_image:
self.entry_win.attroff(curses.A_REVERSE)
self.entry_win.noutrefresh()
def edit_entry(self, origimg):
def draw():
self.draw_main_windows()
self.text_win.addstr(0, 0, "Use the U and D keys to select which entry is highlighted.")
self.text_win.addstr(1, 0, "Press 'b' to boot, 'e' to edit the selected command in the")
self.text_win.addstr(2, 0, "boot sequence, 'c' for a command-line, 'o' to open a new line")
self.text_win.addstr(3, 0, "after ('O' for before) the selected line, 'd' to remove the")
self.text_win.addstr(4, 0, "selected line, or escape to go back to the main menu.")
self.text_win.addch(0, 8, curses.ACS_UARROW)
self.text_win.addch(0, 14, curses.ACS_DARROW)
(y, x) = self.text_win.getmaxyx()
self.text_win.move(y - 1, x - 1)
self.text_win.noutrefresh()
curline = 0
pos = 0
img = copy.deepcopy(origimg)
while 1:
draw()
self.entry_win.erase()
rs = 0
re = len(img.lines)
idp = 1
if re > Grub.ENTRY_WIN_LINES:
rs = curline - pos
re = rs + Grub.ENTRY_WIN_LINES
for idx in range(rs, re):
# current line should be highlighted
if idx == curline:
self.entry_win.attron(curses.A_REVERSE)
# trim the line
l = img.lines[idx].expandtabs().ljust(70)
if len(l) > 70:
l = l[:69] + ">"
self.entry_win.addstr(idp, 2, l)
if idx == curline:
self.entry_win.attroff(curses.A_REVERSE)
idp += 1
self.entry_win.box()
self.entry_win.noutrefresh()
curses.doupdate()
c = self.screen.getch()
if c in (ord('q'), 27): # 27 == esc
break
elif c == curses.KEY_UP:
curline -= 1
if pos > 0:
pos -= 1
elif c == curses.KEY_DOWN:
curline += 1
if pos < Grub.ENTRY_WIN_LINES - 1:
pos += 1
elif c == ord('b'):
self.isdone = True
break
elif c == ord('e'):
l = self.edit_line(img.lines[curline])
if l is not None:
img.set_from_line(l, replace = curline)
elif c == ord('d'):
img.lines.pop(curline)
elif c == ord('o'):
img.lines.insert(curline+1, "")
curline += 1
elif c == ord('O'):
img.lines.insert(curline, "")
elif c == ord('c'):
self.command_line_mode()
if self.isdone:
return
# bound at the top and bottom
if curline < 0:
curline = 0
elif curline >= len(img.lines):
curline = len(img.lines) - 1
if self.isdone:
origimg.reset(img.lines)
def edit_line(self, line):
self.screen.erase()
self.screen.addstr(1, 2, "[ Minimal BASH-like line editing is supported. ")
self.screen.addstr(2, 2, " ESC at any time cancels. ENTER at any time accepts your changes. ]")
self.screen.noutrefresh()
t = GrubLineEditor(self.screen, 5, 2, line)
enable_cursor(True)
ret = t.edit()
if ret:
return ret
return None
def command_line_mode(self):
self.screen.erase()
self.screen.addstr(1, 2, "[ Minimal BASH-like line editing is supported. ESC at any time ")
self.screen.addstr(2, 2, " exits. Typing 'boot' will boot with your entered commands. ] ")
self.screen.noutrefresh()
y = 5
lines = []
while 1:
t = GrubLineEditor(self.screen, y, 2)
enable_cursor(True)
ret = t.edit()
if ret:
if ret in ("quit", "return"):
break
elif ret != "boot":
y += 1
lines.append(ret)
continue
# if we got boot, then we want to boot the entered image
img = self.cf.new_image("entered", lines)
self.cf.add_image(img)
self.selected_image = len(self.cf.images) - 1
self.isdone = True
break
# else, we cancelled and should just go back
break
def read_config(self, fn, fs = None):
"""Read the given file to parse the config. If fs = None, then
we're being given a raw config file rather than a disk image."""
if not os.access(fn, os.R_OK):
raise RuntimeError, "Unable to access %s" %(fn,)
cfg_list = map(lambda x: (x,grub.GrubConf.Grub2ConfigFile),
["/boot/grub/grub.cfg", "/grub/grub.cfg",
"/boot/grub2/grub.cfg", "/grub2/grub.cfg"]) + \
map(lambda x: (x,grub.ExtLinuxConf.ExtLinuxConfigFile),
["/boot/isolinux/isolinux.cfg",
"/boot/extlinux/extlinux.conf",
"/boot/extlinux.conf",
"/extlinux/extlinux.conf",
"/extlinux.conf"]) + \
map(lambda x: (x,grub.GrubConf.GrubConfigFile),
["/boot/grub/menu.lst", "/boot/grub/grub.conf",
"/grub/menu.lst", "/grub/grub.conf"])
if not fs:
# set the config file and parse it
for f,parser in cfg_list:
self.cf = parser()
self.cf.filename = fn
self.cf.parse()
return
for f,parser in cfg_list:
if fs.file_exists(f):
print >>sys.stderr, "Using %s to parse %s" % (parser,f)
self.cf = parser()
self.cf.filename = f
break
if self.__dict__.get('cf', None) is None:
raise RuntimeError, "couldn't find bootloader config file in the image provided."
f = fs.open_file(self.cf.filename)
# limit read size to avoid pathological cases
buf = f.read(FS_READ_MAX)
del f
self.cf.parse(buf)
def image_index(self):
if isinstance(self.cf.default, int):
sel = self.cf.default
elif self.cf.default.isdigit():
sel = int(self.cf.default)
else:
# We don't fully support submenus. Look for the leaf value in
# "submenu0>submenu1>...>menuentry" and hope that it's unique.
title = self.cf.default
while 1:
try:
title = re.search('(\S)>(\S.+$)',title).group(2)
except AttributeError:
break
# Map string to index in images array
sel = 0
for i in range(len(self.cf.images)):
if self.cf.images[i].title == title:
sel = i
break
# If the selected (default) image doesn't exist we select the first entry
if sel > len(self.cf.images):
logging.warning("Default image not found")
sel = 0
return sel
def run(self):
timeout = int(self.cf.timeout)
self.selected_image = self.image_index()
self.isdone = False
while not self.isdone:
self.run_main(timeout)
timeout = -1
return self.selected_image
def run_main(self, timeout = -1):
def draw():
# set up the screen
self.draw_main_windows()
if not self.cf.hasPassword() or self.cf.hasPasswordAccess():
self.text_win.addstr(0, 0, "Use the U and D keys to select which entry is highlighted.")
self.text_win.addstr(1, 0, "Press enter to boot the selected OS, 'e' to edit the")
self.text_win.addstr(2, 0, "commands before booting, 'a' to modify the kernel arguments ")
self.text_win.addstr(3, 0, "before booting, or 'c' for a command line.")
else:
self.text_win.addstr(0, 0, "Use the U and D keys to select which entry is highlighted.")
self.text_win.addstr(1, 0, "Press enter to boot the selected OS or `p` to enter a")
self.text_win.addstr(2, 0, "password to unlock the next set of features.")
self.text_win.addch(0, 8, curses.ACS_UARROW)
self.text_win.addch(0, 14, curses.ACS_DARROW)
(y, x) = self.text_win.getmaxyx()
self.text_win.move(y - 1, x - 1)
self.text_win.noutrefresh()
# now loop until we hit the timeout or get a go from the user
mytime = 0
self.start_image = 0
while (timeout == -1 or mytime < int(timeout)):
draw()
if timeout != -1 and mytime != -1:
self.screen.addstr(20, 5, "Will boot selected entry in %2d seconds"
%(int(timeout) - mytime))
else:
self.screen.addstr(20, 5, " " * 80)
self.fill_entry_list()
curses.doupdate()
c = self.screen.getch()
if c == -1:
# Timed out waiting for a keypress
if mytime != -1:
mytime += 1
if mytime >= int(timeout):
self.isdone = True
break
else:
# received a keypress: stop the timer
mytime = -1
self.screen.timeout(-1)
# handle keypresses
if c == ord('c') and self.cf.hasPasswordAccess():
self.command_line_mode()
break
elif c == ord('a') and self.cf.hasPasswordAccess():
# find the kernel line, edit it and then boot
img = self.cf.images[self.selected_image]
for line in img.lines:
if line.startswith("kernel") or line.startswith("linux"):
l = self.edit_line(line)
if l is not None:
img.set_from_line(l, replace = True)
self.isdone = True
break
break
elif c == ord('e') and self.cf.hasPasswordAccess():
img = self.cf.images[self.selected_image]
self.edit_entry(img)
break
elif c == ord('p') and self.cf.hasPassword():
self.text_win.addstr(6, 1, "Password: ")
pwd = self.text_win.getstr(6, 8)
if not self.cf.checkPassword(pwd):
self.text_win.addstr(6, 1, "Password: ")
if self.cf.passExc is not None:
self.text_win.addstr(7, 0, "Exception: %s"
% self.cf.passExc)
else:
self.text_win.addstr(7, 0, "Failed!")
self.cf.setPasswordAccess( False )
else:
self.cf.setPasswordAccess( True )
break
elif c in (curses.KEY_ENTER, ord('\n'), ord('\r')):
self.isdone = True
break
elif c == curses.KEY_UP:
self.selected_image -= 1
elif c == curses.KEY_DOWN:
self.selected_image += 1
# elif c in (ord('q'), 27): # 27 == esc
# self.selected_image = -1
# self.isdone = True
# break
# bound at the top and bottom
if self.selected_image < 0:
self.selected_image = 0
elif self.selected_image >= len(self.cf.images):
self.selected_image = len(self.cf.images) - 1
def get_entry_idx(cf, entry):
# first, see if the given entry is numeric
try:
idx = string.atoi(entry)
return idx
except ValueError:
pass
# it's not, now check the labels for a match
for i in range(len(cf.images)):
if entry == cf.images[i].title:
return i
return None
def run_grub(file, entry, fs, cfg_args):
global g
global sel
def run_main(scr, *args):
global sel
global g
sel = g.run()
g = Grub(file, fs)
if list_entries:
for i in range(len(g.cf.images)):
img = g.cf.images[i]
print "title: %s" % img.title
print " root: %s" % img.root
print " kernel: %s" % img.kernel[1]
print " args: %s" % img.args
print " initrd: %s" % img.initrd[1]
if interactive and not list_entries:
curses.wrapper(run_main)
else:
sel = g.image_index()
# set the entry to boot as requested
if entry is not None:
idx = get_entry_idx(g.cf, entry)
if idx is not None and idx >= 0 and idx < len(g.cf.images):
sel = idx
if sel == -1:
print "No kernel image selected!"
sys.exit(1)
try:
img = g.cf.images[sel]
except IndexError:
img = g.cf.images[0]
grubcfg = { "kernel": None, "ramdisk": None, "args": "" }
grubcfg["kernel"] = img.kernel[1]
if img.initrd:
grubcfg["ramdisk"] = img.initrd[1]
if img.args:
grubcfg["args"] += img.args
if cfg_args:
grubcfg["args"] += " " + cfg_args
return grubcfg
def sniff_netware(fs, cfg):
if not fs.file_exists("/nwserver/xnloader.sys"):
return cfg
if not cfg["kernel"]:
cfg["kernel"] = "/nwserver/xnloader.sys"
return cfg
def format_sxp(kernel, ramdisk, args):
s = "linux (kernel %s)" % kernel
if ramdisk:
s += "(ramdisk %s)" % ramdisk
if args:
s += "(args \"%s\")" % args
return s
def format_simple(kernel, ramdisk, args, sep):
s = ("kernel %s" % kernel) + sep
if ramdisk:
s += ("ramdisk %s" % ramdisk) + sep
if args:
s += ("args %s" % args) + sep
s += sep
return s
if __name__ == "__main__":
sel = None
def usage():
print >> sys.stderr, "Usage: %s [-q|--quiet] [-i|--interactive] [-l|--list-entries] [-n|--not-really] [--output=] [--kernel=] [--ramdisk=] [--args=] [--entry=] [--output-directory=] [--output-format=sxp|simple|simple0] [--offset=] <image>" %(sys.argv[0],)
def copy_from_image(fs, file_to_read, file_type, output_directory,
not_really):
if not_really:
if fs.file_exists(file_to_read):
return "<%s:%s>" % (file_type, file_to_read)
else:
sys.exit("The requested %s file does not exist" % file_type)
try:
datafile = fs.open_file(file_to_read)
except Exception, e:
print >>sys.stderr, e
sys.exit("Error opening %s in guest" % file_to_read)
(tfd, ret) = tempfile.mkstemp(prefix="boot_"+file_type+".",
dir=output_directory)
dataoff = 0
while True:
data = datafile.read(FS_READ_MAX, dataoff)
if len(data) == 0:
os.close(tfd)
del datafile
return ret
try:
os.write(tfd, data)
except Exception, e:
print >>sys.stderr, e
os.close(tfd)
os.unlink(ret)
del datafile
sys.exit("Error writing temporary copy of "+file_type)
dataoff += len(data)
try:
opts, args = getopt.gnu_getopt(sys.argv[1:], 'qilnh::',
["quiet", "interactive", "list-entries", "not-really", "help",
"output=", "output-format=", "output-directory=", "offset=",
"entry=", "kernel=",
"ramdisk=", "args=", "isconfig", "debug"])
except getopt.GetoptError:
usage()
sys.exit(1)
if len(args) < 1:
usage()
sys.exit(1)
file = args[0]
fs = None
output = None
entry = None
interactive = True
list_entries = False
isconfig = False
part_offs = None
debug = False
not_really = False
output_format = "sxp"
output_directory = "/var/run/xen/pygrub"
# what was passed in
incfg = { "kernel": None, "ramdisk": None, "args": "" }
# what grub or sniffing chose
chosencfg = { "kernel": None, "ramdisk": None, "args": None }
# what to boot
bootcfg = { "kernel": None, "ramdisk": None, "args": None }
for o, a in opts:
if o in ("-q", "--quiet"):
interactive = False
elif o in ("-i", "--interactive"):
interactive = True
elif o in ("-l", "--list-entries"):
list_entries = True
elif o in ("-n", "--not-really"):
not_really = True
elif o in ("-h", "--help"):
usage()
sys.exit()
elif o in ("--output",):
output = a
elif o in ("--kernel",):
incfg["kernel"] = a
elif o in ("--ramdisk",):
incfg["ramdisk"] = a
elif o in ("--args",):
incfg["args"] = a
elif o in ("--offset",):
try:
part_offs = [ int(a) ]
except ValueError:
print "offset value must be an integer"
usage()
sys.exit(1)
elif o in ("--entry",):
entry = a
# specifying the entry to boot implies non-interactive
interactive = False
elif o in ("--isconfig",):
isconfig = True
elif o in ("--debug",):
debug = True
elif o in ("--output-format",):
if a not in ["sxp", "simple", "simple0"]:
print "unknown output format %s" % a
usage()
sys.exit(1)
output_format = a
elif o in ("--output-directory",):
if not os.path.isdir(a):
print "%s is not an existing directory" % a
sys.exit(1)
output_directory = a
if debug:
logging.basicConfig(level=logging.DEBUG)
try:
os.makedirs(output_directory, 0700)
except OSError,e:
if (e.errno == errno.EEXIST) and os.path.isdir(output_directory):
pass
else:
raise
if output is None or output == "-":
fd = sys.stdout.fileno()
else:
fd = os.open(output, os.O_WRONLY)
# debug
if isconfig:
chosencfg = run_grub(file, entry, fs, incfg["args"])
print " kernel: %s" % chosencfg["kernel"]
if chosencfg["ramdisk"]:
print " initrd: %s" % chosencfg["ramdisk"]
print " args: %s" % chosencfg["args"]
sys.exit(0)
# if boot filesystem is set then pass to fsimage.open
bootfsargs = '"%s"' % incfg["args"]
bootfsgroup = re.findall('zfs-bootfs=(.*?)[\s\,\"]', bootfsargs)
if bootfsgroup:
bootfsoptions = bootfsgroup[0]
else:
bootfsoptions = ""
# get list of offsets into file which start partitions
if part_offs is None:
part_offs = get_partition_offsets(file)
for offset in part_offs:
try:
fs = fsimage.open(file, offset, bootfsoptions)
chosencfg = sniff_netware(fs, incfg)
if not chosencfg["kernel"]:
chosencfg = run_grub(file, entry, fs, incfg["args"])
# Break as soon as we've found the kernel so that we continue
# to use this fsimage object
if chosencfg["kernel"]:
break
fs = None
except:
# IOErrors raised by fsimage.open
# RuntimeErrors raised by run_grub if no menu.lst present
if debug:
traceback.print_exc()
fs = None
continue
if list_entries:
sys.exit(0)
# Did looping through partitions find us a kernel?
if fs is None:
raise RuntimeError, "Unable to find partition containing kernel"
bootcfg["kernel"] = copy_from_image(fs, chosencfg["kernel"], "kernel",
output_directory, not_really)
if chosencfg["ramdisk"]:
try:
bootcfg["ramdisk"] = copy_from_image(fs, chosencfg["ramdisk"],
"ramdisk", output_directory,
not_really)
except:
if not not_really:
os.unlink(bootcfg["kernel"])
raise
else:
initrd = None
args = None
if chosencfg["args"]:
zfsinfo = fsimage.getbootstring(fs)
if zfsinfo is not None:
e = re.compile("zfs-bootfs=[\w\-\.\:@/]+" )
(chosencfg["args"],count) = e.subn(zfsinfo, chosencfg["args"])
if count == 0:
chosencfg["args"] += " -B %s" % zfsinfo
args = chosencfg["args"]
if output_format == "sxp":
ostring = format_sxp(bootcfg["kernel"], bootcfg["ramdisk"], args)
elif output_format == "simple":
ostring = format_simple(bootcfg["kernel"], bootcfg["ramdisk"], args, "\n")
elif output_format == "simple0":
ostring = format_simple(bootcfg["kernel"], bootcfg["ramdisk"], args, "\0")
sys.stdout.flush()
os.write(fd, ostring)
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