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NAME

ludesc - display or set boot environment description
 

SYNOPSIS

/usr/sbin/ludesc {-A BE_description} | {-f {filename | -}} 
    [-l error_log] [-o outfile] [-X]

/usr/sbin/ludesc -n BE_name [-f filename | -] 
    [-l error_log] [-o outfile] [-X]

/usr/sbin/ludesc -n BE_name [-l error_log] [-o outfile] 
    [-X] BE_description

DESCRIPTION

The ludesc command is part of a suite of commands that make up the Live Upgrade feature of the Solaris operating environment. See live_upgrade(5) for a description of the Live Upgrade feature.

The ludesc command allows you to manipulate boot environment (BE) descriptions. A BE description is an optional attribute of a BE. It can be text or binary data. For example, it might be a string such as "S9 beta test BE" or it might be a file that contains 8-bit multi-byte characters. The ludesc command in general and the options to manipulate binary-format descriptions in particular are suitable for use in programs.

You create a BE description using ludesc or lucreate(1M). Only ludesc allows you to change a BE description or add a description following BE creation.

While a BE description is associated with a BE name, it is not interchangeable with that name. No Live Upgrade command allows you to specify a BE description instead of a BE name when performing an operation on a BE.

A shell might restrict what you enter for a BE description (in both ludesc and lucreate(1M)). In entering a description, use the following guidelines:

o Always enclose a description in single quotes ('), unless the description includes a single quote.

o If your description includes a single quote, enclose the description in double quotes ("). You then must use an escape sequence (usually a backslash [\]) to enter a character that is special to the shell. See sh(1) for a list of special characters and a description of the escape sequence mechanism.

Descriptions that include many special characters might be more conveniently inserted in a file (-f option) than entered on a command line (-A option).

When ludesc outputs a BE description, it does so exactly as the description was entered. Because of this feature, a description that is a text string does not have a concluding newline, which means the system prompt immediately follows the last character of the description.

The ludesc command requires root privileges.  

OPTIONS

The ludesc command has the following options:

-A BE_description

Displays the BE name associated with BE_description.

-f {filename | -}

Specify the BE description contained in filename or read from stdin. When used without -n, displays the BE name associated with the specified BE description. Used with -n, changes the description for the specified BE to the description specified with -f.

-l error_log

Error and status messages are sent to error_log, in addition to where they are sent in your current environment.

-n BE_name

With no other arguments, displays the BE description for the specified BE. With the -f option or the BE_description operand, changes the description for the specified BE to that specified with -f or BE_description.

-o outfile

All command output is sent to outfile, in addition to where it is sent in your current environment.

-X

Enable XML output. Characteristics of XML are defined in DTD, in /usr/share/lib/xml/dtd/lu_cli.dtd.<num>, where <num> is the version number of the DTD file.

OPERANDS

BE_description

Used only with the -n option. BE_description replaces the current BE description for the specified BE.

EXAMPLES

The following are examples of the use of ludesc.

Example 1 Basic Use

The first command, below, assigns a description to a BE. The second command returns the name of the BE associated with the specified description. The last command returns the description associated with a specified BE.

# ludesc -n first_disk 'Test disk'
Setting description for boot environment <first_disk>.
Propagating the change of BE description to all BEs.

# ludesc -A 'Test disk'
first_disk
#

# ludesc -n first_disk
Test disk#

As seen above and noted in the DESCRIPTION, ludesc does not append a newline to the display of BE description that is a text string.

Example 2 Using Binary Files

The following commands are analogs of the preceding examples, substituting a binary file-here, a file containing a description in Russian, using the Cyrillic alphabet---for a text string. In the third command, note the use of a file to capture output. Sending output of a binary file to the console can produce erratic results.

# ludesc -n first_disk -f arrayBE.ru
Setting description for boot environment <first_disk>.
Propagating the change of BE description to all BEs.

# ludesc -f arrayBE.ru
first_disk

# ludesc -n first_disk > /tmp/arrayBE.out

EXIT STATUS

The following exit values are returned:

0

Successful completion.

>0

An error occurred.

FILES

/etc/lutab

list of BEs on the system

/usr/share/lib/xml/dtd/lu_cli.dtd.<num>

Live Upgrade DTD (see -X option)

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE Availability SUNWluu

SEE ALSO

luactivate(1M), lucancel(1M), lucompare(1M), lucreate(1M), ludelete(1M), lufslist(1M), lumake(1M), lumount(1M), lurename(1M), lustatus(1M), luupgrade(1M), lutab(4), attributes(5), live_upgrade(5)

Index

NAME

SYNOPSIS

DESCRIPTION

OPTIONS

OPERANDS

EXAMPLES

EXIT STATUS

FILES

ATTRIBUTES

SEE ALSO

Партнёры:

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