Try passing "single init=/bin/bash" as "extras"
Just "single" should get you by, however not sure what OS your dom-u is,
above method should work on just about everything.
If this is just to change the root password, I'm attaching a handy perl
script to make the appropriate md5/digest hash so its easy to edit
the /etc/passwd (or shadow) on the dom-u without the hassle of chroot,
handy to automate re-setting a lost root password.
just run ./setroot.pl password , its designed to be used in a shell
script .. so echo -e `./setroot.pl password` "\n" may make for better
human readable output which one could cut and paste :)
It will return the appropriate md5 for the password you can replace
in /etc/password , /etc/shadow respectively.
Again, I ripped this right out of webmin to have something handy to use
via command line to provision dom-u's without help from humans and with
very little effort and to make a method available to allow dom-u root
users to re-set their password self-service.
Best,
-Tim
Begin setroot.pl (chmod +x to use)
-----------------------------------[snip]
#!/usr/bin/perl
# Functions for MD5 and SHA1 password encryption
# check_md5()
# Returns a perl module name if the needed perl module(s) for MD5
encryption
# are not installed, or undef if they are
sub check_md5
{
eval "use MD5";
if (!$@) {
eval "use Digest::MD5";
if ($@) {
return "Digest::MD5";
}
}
return undef;
}
# encrypt_md5(string, [salt])
# Returns a string encrypted in MD5 format
sub encrypt_md5
{
local $passwd = $_[0];
local $magic = '$1$';
local $salt = $_[1] || substr(time(), -8);
# Add the password, magic and salt
local $cls = "MD5";
eval "use MD5";
if ($@) {
$cls = "Digest::MD5";
eval "use Digest::MD5";
if ($@) {
&error("Missing MD5 or Digest::MD5 perl modules");
}
}
local $ctx = eval "new $cls";
$ctx->add($passwd);
$ctx->add($magic);
$ctx->add($salt);
# Add some more stuff from the hash of the password and salt
local $ctx1 = eval "new $cls";
$ctx1->add($passwd);
$ctx1->add($salt);
$ctx1->add($passwd);
local $final = $ctx1->digest();
for($pl=length($passwd); $pl>0; $pl-=16) {
$ctx->add($pl > 16 ? $final : substr($final, 0, $pl));
}
# This piece of code seems rather pointless, but it's in the C code that
# does MD5 in PAM so it has to go in!
local $j = 0;
local ($i, $l);
for($i=length($passwd); $i; $i >>= 1) {
if ($i & 1) {
$ctx->add("\0");
}
else {
$ctx->add(substr($passwd, $j, 1));
}
}
$final = $ctx->digest();
# This loop exists only to waste time
for($i=0; $i<1000; $i++) {
$ctx1 = eval "new $cls";
$ctx1->add($i & 1 ? $passwd : $final);
$ctx1->add($salt) if ($i % 3);
$ctx1->add($passwd) if ($i % 7);
$ctx1->add($i & 1 ? $final : $passwd);
$final = $ctx1->digest();
}
# Convert the 16-byte final string into a readable form
local $rv = $magic.$salt.'$';
local @final = map { ord($_) } split(//, $final);
$l = ($final[ 0]<<16) + ($final[ 6]<<8) + $final[12];
$rv .= &to64($l, 4);
$l = ($final[ 1]<<16) + ($final[ 7]<<8) + $final[13];
$rv .= &to64($l, 4);
$l = ($final[ 2]<<16) + ($final[ 8]<<8) + $final[14];
$rv .= &to64($l, 4);
$l = ($final[ 3]<<16) + ($final[ 9]<<8) + $final[15];
$rv .= &to64($l, 4);
$l = ($final[ 4]<<16) + ($final[10]<<8) + $final[ 5];
$rv .= &to64($l, 4);
$l = $final[11];
$rv .= &to64($l, 2);
return $rv;
}
@itoa64 = split(//,
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz");
sub to64
{
local ($v, $n) = @_;
local $r;
while(--$n >= 0) {
$r .= $itoa64[$v & 0x3f];
$v >>= 6;
}
return $r;
}
sub check_sha1
{
eval "use Digest::SHA1";
return $@ ? "Digest::SHA1" : undef;
}
# encrypt_sha1(password)
# Encrypts a password in SHA1 format
sub encrypt_sha1
{
local $pass = $_[0];
local $sh = eval "use Digest::SHA1 qw(sha1_base64);return sha1_base64(\
$pass);";
return "{SHA}$sh=";
}
1;
$pass=$ARGV[0];
$md5=encrypt_md5("$pass");
print $md5;
[/snip]------------------------------------------------------------
On Mon, 2006-09-25 at 01:16 -0400, Bhatia, Nikhil wrote:
> Hello Xen Users,
>
>
>
> I am trying to log into the guest domain in a single-user mode but am
> unable to do so by putting the value of the “extras” field in my
> configure script to 1. Is that the right way to get into the
> single-user mode? If not can anyone please let me know of the correct
> way?
>
>
>
> Thanks,
>
> Nikhil
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
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