[Fedora-xen] Problem starting Xen guest From SSH - Fedora5

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Hi all,
 
When i start xen guest from console all is OK but
i have this error if i try to start from SSH:
 
[root@fedora bin]# /usr/sbin/xm create -c virtual7
Using config file "/etc/xen/virtual7".
 
Traceback (most recent call last):
  File "/usr/bin/pygrub", line 258, in ?
    curses.wrapper(run_main)
  File "/usr/lib/python2.4/curses/wrapper.py", line 44, in wrapper
    return func(stdscr, *args, **kwds)
  File "/usr/bin/pygrub", line 214, in run_main
    sel = main(cf)
  File "/usr/bin/pygrub", line 162, in main
    (stdscr, win) = draw_window()
  File "/usr/bin/pygrub", line 33, in draw_window
    curses.use_default_colors()
_curses.error: use_default_colors() returned ERR
Error: Boot loader didn't return any data!
 
 
Any Ideas ?
Thanks
 
This is my envirorment:
 
OS: Fedora core 5
XEN version:
Name        : xen                          Relocations: (not relocatable)
Version     : 3.0.2                             Vendor: Red Hat, Inc.
Release     : 0.FC5.1                       Build Date: gio 04 mag 2006 17:27:42 CEST
Install Date: ven 12 mag 2006 18:45:01 CEST      Build Host: hs20-bc1-5.build.redhat.com
Group       : Development/Libraries         Source RPM: xen-3.0.2-0.FC5.1.src.rpm
Size        : 3903916                          License: GPL
Signature   : DSA/SHA1, gio 04 mag 2006 19:03:45 CEST, Key ID da84cbd430c9ecf8
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL         : http://www.cl.cam.ac.uk/Research/SRG/netos/xen/index.html
 
Kernel version:
kernel-xen0-2.6.16-1.2096_FC5.i686.rpm
 
Kernel guest version: 2.6.15-1.2054_FC5xenU
 
---------------------------------------------------------------------------------
 
[root@fedora bin]# cat /usr/bin/pygrub
#!/usr/bin/python
#
# pygrub - simple python-based bootloader for Xen
#
# Copyright 2005 Red Hat, Inc.
# Jeremy Katz <katzj@xxxxxxxxxx>
#
# 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
 
import os, sys, string, struct, tempfile
import logging
 
import curses, _curses, curses.wrapper
import getopt
 
sys.path = [ '/usr/lib/python' ] + sys.path
 
import grub.GrubConf
import grub.fsys
 
PYGRUB_VER = 0.3
 

def draw_window():
    stdscr = curses.initscr()
    if hasattr(curses, 'use_default_colors'):
        curses.use_default_colors()
    try:
        curses.curs_set(0)
    except _curses.error:
        pass
 
    stdscr.addstr(1, 4, "pyGRUB  version %s" %(PYGRUB_VER,))
 
    win = curses.newwin(10, 74, 2, 1)
    win.box()
    win.refresh()
 
    stdscr.addstr(12, 5, "Use the U and D keys to select which entry is highlighted.")
    stdscr.addstr(13, 5, "Press enter to boot the selected OS. 'e' to edit the")
    stdscr.addstr(14, 5, "commands before booting, 'a' to modify the kernel arguments ")
    stdscr.addstr(15, 5, "before booting, or 'c' for a command line.")
    stdscr.addch(12, 13, curses.ACS_UARROW)
    stdscr.addch(12, 19, curses.ACS_DARROW)
    (y, x) = stdscr.getmaxyx()
    stdscr.move(y - 1, x - 1)
 
    stdscr.refresh()
    return (stdscr, win)
 
def fill_entries(win, cfg, selected):
    y = 0
 
    for i in cfg.images:
        if (0, y) > win.getmaxyx():
            break
        if y == selected:
            attr = curses.A_REVERSE
        else:
            attr = 0
        win.addstr(y + 1, 2, i.title.ljust(70), attr)
        y += 1
    win.refresh()
 
def select(win, line):
    win.attron(curses.A_REVERSE)
    win.redrawln(line + 1, 1)
    win.refresh()
 
def is_disk_image(file):
    fd = os.open(file, os.O_RDONLY)
    buf = os.read(fd, 512)
    os.close(fd)
 
    if len(buf) >= 512 and struct.unpack("H", buf[0x1fe: 0x200]) == (0xaa55,):
        return True
    return False
 
SECTOR_SIZE=512
def get_active_offset(file):
    """Find the offset for the start of the first active partition in the
    disk image file."""
    fd = os.open(file, os.O_RDONLY)
    buf = os.read(fd, 512)
    for poff in (446, 462, 478, 494): # partition offsets
        # active partition has 0x80 as the first byte
        if struct.unpack("<c", buf[poff:poff+1]) == ('\x80',):
            return struct.unpack("<L", buf[poff+8:poff+12])[0] * SECTOR_SIZE
    return -1
 
def get_config(fn, isconfig = False):
    if not os.access(fn, os.R_OK):
        raise RuntimeError, "Unable to access %s" %(fn,)
 
    cf = grub.GrubConf.GrubConfigFile()
 
    if isconfig:
        # set the config file and parse it
        cf.filename = fn
        cf.parse()
        return cf
 
    offset = 0
    if is_disk_image(fn):
        offset = get_active_offset(fn)
        if offset == -1:
            raise RuntimeError, "Unable to find active partition on disk"
 
    # open the image and read the grub config
    fs = None
    for fstype in grub.fsys.fstypes.values():
        if fstype.sniff_magic(fn, offset):
            fs = fstype.open_fs(fn, offset)
            break
 
    if fs is not None:
        grubfile = None
        for f in ("/boot/grub/menu.lst", "/boot/grub/grub.conf",
                  "/grub/menu.lst", "/grub/grub.conf"):
            if fs.file_exist(f):
                grubfile = f
                break
        if grubfile is None:
            raise RuntimeError, "we couldn't find /boot/grub{menu.lst,grub.conf} " + \
                                "in the image provided. halt!"
        f = fs.open_file(grubfile)
        buf = f.read()
        f.close()
        fs.close()
        # then parse the grub config
        cf.parse(buf)
    else:
        raise RuntimeError, "Unable to read filesystem"
   
    return cf
 
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 main(cf = None):
    mytime = 0
    timeout = int(cf.timeout)
 
    (stdscr, win) = draw_window()
    stdscr.timeout(1000)
    selected = cf.default
   
    while (timeout == -1 or mytime < int(timeout)):
        if timeout != -1 and mytime != -1:
            stdscr.addstr(20, 5, "Will boot selected entry in %2d seconds"
                          %(int(timeout) - mytime))
        else:
            stdscr.addstr(20, 5, " " * 80)
           
        fill_entries(win, cf, selected)
        c = stdscr.getch()
        if mytime != -1:
            mytime += 1
#        if c == ord('q'):
#            selected = -1
#            break
        if c == ord('c'):
            # FIXME: needs to go to command line mode
            continue
        elif c == ord('a'):
            # FIXME: needs to go to append mode
            continue
        elif c == ord('e'):
            # FIXME: needs to go to edit mode
            continue
        elif c in (curses.KEY_ENTER, ord('\n'), ord('\r')):
            break
        elif c == curses.KEY_UP:
            mytime = -1
            selected -= 1
        elif c == curses.KEY_DOWN:
            mytime = -1
            selected += 1
        else:
            pass
 
        # bound at the top and bottom
        if selected < 0:
            selected = 0
        elif selected >= len(cf.images):
            selected = len(cf.images) - 1
 
    if selected >= 0:
        return selected
 
if __name__ == "__main__":
    sel = None
   
    def run_main(scr, *args):
        global sel
        sel = main(cf)
 
    def usage():
        print >> sys.stderr, "Usage: %s [-q|--quiet] [--output=] [--entry=] <image>" %(sys.argv[0],)
 
    try:
        opts, args = getopt.gnu_getopt(sys.argv[1:], 'qh::',
                                   ["quiet", "help", "output=", "entry=",
                                    "isconfig"])
    except getopt.GetoptError:
        usage()
        sys.exit(1)
 
    if len(args) < 1:
        usage()
        sys.exit(1)
    file = args[0]
       
    output = None
    entry = None
    interactive = True
    isconfig = False
    for o, a in opts:
        if o in ("-q", "--quiet"):
            interactive = False
        elif o in ("-h", "--help"):
            usage()
            sys.exit()
        elif o in ("--output",):
            output = a
        elif o in ("--entry",):
            entry = a
            # specifying the entry to boot implies non-interactive
            interactive = False
        elif o in ("--isconfig",):
            isconfig = True
 
    if output is None or output == "-":
        fd = sys.stdout.fileno()
    else:
        fd = os.open(output, os.O_WRONLY)
 
    cf = get_config(file, isconfig)
    if interactive:
        curses.wrapper(run_main)
    else:
        sel = cf.default
 
    # set the entry to boot as requested
    if entry is not None:
        idx = get_entry_idx(cf, entry)
        if idx is not None and idx > 0 and idx < len(cf.images):
            sel = idx
 
    img = cf.images[sel]
    print "Going to boot %s" %(img.title)
    print "  kernel: %s" %(img.kernel[1],)
    if img.initrd:
        print "  initrd: %s" %(img.initrd[1],)
 
    offset = 0
    if is_disk_image(file):
        offset = get_active_offset(file)
        if offset == -1:
            raise RuntimeError, "Unable to find active partition on disk"
 
    # read the kernel and initrd onto the hostfs
    fs = None
    for fstype in grub.fsys.fstypes.values():
        if fstype.sniff_magic(file, offset):
            fs = fstype.open_fs(file, offset)
            break
 
    if fs is None:
        raise RuntimeError, "Unable to open filesystem"
 
    kernel = fs.open_file(img.kernel[1],).read()
    (tfd, fn) = tempfile.mkstemp(prefix="vmlinuz.", dir="/var/lib/xen")
    os.write(tfd, kernel)
    os.close(tfd)
    sxp = "linux (kernel %s)" %(fn,)
 
    if img.initrd:
        initrd = fs.open_file(img.initrd[1],).read()
        (tfd, fn) = tempfile.mkstemp(prefix="initrd.", dir="/var/lib/xen")
        os.write(tfd, initrd)
        os.close(tfd)
        sxp += "(ramdisk %s)" %(fn,)
    else:
        initrd = None
    sxp += "(args '%s')" %(img.args,)
 
    sys.stdout.flush()
    os.write(fd, sxp)
---------------------------------------------------------------------------------
 
 

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