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User Commands zlogin(1)
NAME
zlogin - enter a zone
SYNOPSIS
zlogin [-CE] [-e c] [-l username] zonename
zlogin [-ES] [-e c] [-l username] zonename utility [argu-
ment...]
DESCRIPTION
The zlogin utility is used by the administrator to enter an
operating system zone. Only a superuser operating in the
global system zone can use this utility.
zlogin operates in one of three modes:
Interactive Mode
If no utility argument is given and the stdin file
descriptor for the zlogin process is a tty device, zlo-
gin operates in interactive mode. In this mode, zlogin
creates a new pseudo terminal for use within the login
session. Programs requiring a tty device, for example,
vi(1), work properly in this mode. In this mode, zlogin
invokes login(1) to provide a suitable login session.
Non-Interactive Mode
If a utility is specified, zlogin operates in non-
interactive mode. This mode can be useful for script
authors since stdin, stdout, and stderr are preserved
and the exit status of utility is returned upon termina-
tion. In this mode, zlogin invokes su(1M) in order to
set up the user's environment and to provide a login
environment.
Console Mode
If the -C option is specified, the user is connected to
the zone console device and zlogin operates in console
mode. The zone console is available once the zone is in
the installed state. Connections to the console are
persistent across reboot of the zone.
OPTIONS
SunOS 5.10 Last change: 14 May 2004 1
User Commands zlogin(1)
The following options are supported:
-C Connects to the zone console.
-e c Specifies a different escape character, c,
for the key sequence used to access extended
functions and to disconnect from the login.
The default escape character is the tilde
(~).
-E Disables the ability to access extended
functions or to disconnect from the login by
using the escape sequence character.
-l username Specifies a different username for the zone
login. If you do not use this option, the
zone username used is "root". This option is
invalid if the -C option is specified.
-S "Safe" login mode. zlogin does minimal pro-
cessing and does not invoke login(1) or
su(1M). The -S option can not be used if a
username is specified through the -l option,
and cannot be used with console logins. This
mode should only be used to recover a dam-
aged zone when other forms of login have
become impossible.
Escape Sequences
Lines that you type that start with the tilde character (~)
are "escape sequences". The escape character can be changed
using the -e option.
~. Disconnects from the zone. This is not the same as
a logout, because the local host breaks the connec-
tion with no warning to the zone's end.
SECURITY
Once a process has been placed in a zone other than the glo-
bal zone, the process cannot change zone again, nor can any
SunOS 5.10 Last change: 14 May 2004 2
User Commands zlogin(1)
of its children.
OPERANDS
The following operands are supported:
zonename The name of the zone to be entered.
utility The utility to be run in the specified zone.
argument... Arguments passed to the utility.
EXIT STATUS
In interactive and non-interactive modes, the zlogin utility
exits when the command or shell in the non-global zone
exits. In non-interactive mode, the exit status of the
remote program is returned as the exit status of zlogin. In
interactive mode and console login mode, the exit status is
not returned. zlogin returns a 0 exit status as long as no
connection-related error occurred.
In all modes, in the event that a connection to the zone
cannot be established, the connection fails unexpectedly, or
the user is lacking sufficient privilege to perform the
requested operation, zlogin exits with status 1.
To summarize, the following exit values are returned:
0 Successful entry.
1 Permission denied, or failure to enter the zone.
Any Return code from utility, or from su(1M) if operat-
ing in non-interactive mode.
ATTRIBUTES
See attributes(5) for descriptions of the following attri-
butes:
SunOS 5.10 Last change: 14 May 2004 3
User Commands zlogin(1)
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWzoneu |
|_____________________________|_____________________________|
| Interface Stability | Evolving |
|_____________________________|_____________________________|
SEE ALSO
login(1), vi(1), su(1M), zoneadm(1M), zonecfg(1M), attri-
butes(5), zones(5)
NOTES
zlogin fails if its open files or any portion of its address
space corresponds to an NFS file. This includes the execut-
able itself or the shared libraries.
SunOS 5.10 Last change: 14 May 2004 4
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Wed Sep 12 11:25:43 GMT 2007
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