Overview

This page provides information on Universal Command (UCMD) Manager specific to the z/OS operating system.

UCMD Manager executes commands on any computer running the UCMD Server component.

You indicate to the UCMD Manager what command(s) to execute and how the standard input and output and error data should be processed. The UCMD Manager connects to the UCMD Server and processes your request.

The z/OS Batch Manager provides a batch job interface to remote computers running the UCMD Server component. The UCMD Manager executes remote commands as they would be if you entered them directly on the remote command line. Standard input and output and error files are supplied using JCL DD statements.

UCMD Manager registers with a locally running Universal Broker. Consequentially, a Universal Broker must be running in order for a UCMD Manager to execute.

Usage

UCMD Manager for z/OS executes as a batch job. It consists of:

• Batch JCL
• Configuration options

This section describes the JCL, configuration and configuration options, and command line syntax of UCMD Manager for z/OS.

JCL Procedure

The following figure illustrates the UCMD Manager for z/OS JCL procedure (UCMDPRC, located in the SUNVSAMP library) that is provided with the Universal Agent for z/OS installation to simplify the execution JCL and future maintenance.

//UCMDPRC  PROC UPARM=,               -- UCMD options
//             STDOUT='SYSOUT=*',     -- stdout of remote command
//             STDERR='SYSOUT=*',     -- stderr of remote command
//             STDIN='DUMMY',         -- stdin of remote command
//             UCMDPRE=#SHLQ.UNV
//*
//PS1      EXEC PGM=UCMD,PARM='ENVAR(TZ=EST5EDT)/&UPARM'
//STEPLIB  DD  DISP=SHR,DSN=&UCMDPRE..SUNVLOAD
//*
//UNVNLS   DD  DISP=SHR,DSN=&UCMDPRE..SUNVNLS
//UNVTRACE DD  SYSOUT=*
//*
//UNVOUT   DD  &STDOUT                         -- Remote stdout
//UNVERR   DD  &STDERR                         -- Remote stderr
//UNVIN    DD  &STDIN                          -- Remote stdin
//\*
//SYSPRINT DD  SYSOUT=*
//SYSOUT   DD  SYSOUT=*
//CEEDUMP  DD  SYSOUT=*

The procedure provides the parameters STDIN, STDOUT, and STDERR to specify the stdin, stdout, and stderr files, respectively, of the remote command.

The UPARM parameter is used to specify EXEC PARM keyword values for the UCMD program. The PARM values to the left of the slash ( / ) character are IBM Language Environment parameters.

For information regarding the Time Zone (TZ) environment variable, see z/OS Installation - Time Zone Environment Variable.

The UCMDPRE parameter specifies the data set name prefix of Universal Agent installation data sets.

DD Statements Used in JCL Procedure

The following table describes the DD statements used in the UCMD Manager for z/OS JCL procedure, above.

* The C runtime library determines the default DCB attributes. See the IBM manual OS/390 C/C++ Programming Guide for details on default DCB attributes for stream I/O.

DD Statement Categories

UCMD Manager DD statements are organized into the following categories:

UNVIN Concatenation Requirements

Sequential data sets can be concatenated on the UNVIN ddname. When the UNVIN ddname is open, it is treated as a single data set with the following attributes:

1. The RECFM of the first data set in the concatenation.
2. The LRECL of the first data set in the concatenation.
3. The BLKSIZE of the largest block size in the concatenation.

IBM does not support concatenating data sets with differing RECFM values or LRECL values larger then the first data set in the concatenation. Unpredictable results, including ABENDs, may occur when these rules are not followed.

IBM documents concatenation rules in the IBM C/C++ Programming Guide.

JCL

The following figure illustrates the UCMD Manager for z/OS JCL using the UCMDPRC JCL procedure, above.

//jobname  JOB CLASS=A,MSGCLASS=X
//STEP1    EXEC UCMDPRC,
//         STDOUT='DISP=SHR,DSN=my.local.file'
//SYSIN    DD  *
 -cmd 'ucopy file' -host dallas -userid joe -pwd akkSdiq
\*

Job step STEP1 executes the procedure UCMDPRC with the STDOUT parameter set to a value that allocates a local file.

The command options are specified on the SYSIN DD.

Configuration

Configuration consists of:

• Setting default options and preferences for all executions of UCMD Manager.
• Setting options and preferences for a single execution of UCMD Manager.

These configuration options are read from the following sources:

1. PARM keyword (command line)
2. SYSIN ddname (command line)
3. Command file ddname
4. Configuration file

The order of precedence is the same as the list above; PARM keyword options being the highest and configuration file being the lowest. That is, options specified via a PARM keyword override options specified via a SYSIN ddname, and so on.

For detailed information on these methods of configuration, see Configuration Management.

Configuration File

The configuration file provides the simplest method of specifying default configuration options whose values you do not want changed with each command invocation. These values are used if the options are not read from one or more other sources.

Some options only can be specified in the configuration file; they have no corresponding command line equivalent. Other options cannot be specified in the configuration file; they must be specified via one or more other sources for a single execution of UCMD Manager.

The configuration file is provided to the UCMD Manager by the local Universal Broker with which it registers. The UCMD Manager configuration file is located in the UCMCFG00 member of the PDSE allocated to the UNVCONF ddname in the Universal Broker started task.

Configuration Options

This section describes the configuration options used to execute UCMD Manager for z/OS.

Configuration Options Categories

The following table categorizes the configuration options into logical areas of application. Each Category name is a link to a table of options in that category. Each Option Name in those tables is a link to detailed information about that option.

Certificate Category Options

Command Category Options

Events Category Options

Local Category Options

Messages Category Options

Miscellaneous Category Options

Network Category Options

Options Category Options

Remote Category Options

Standard File Category Options

User Category Options

Command Line Syntax

The following figure illustrates the command line syntax — using the command line, long form of the configuration options — of UCMD Manager for z/OS.

ucmd
{ -cmd command [-cmd_type {cmdref|shell|stc} ] | -script ddname
  [-options options] [-script_type type] [-script_line_ignore_mask mask] }
[-host hostlist
[-connect_retry_count number]
[-connect_retry_interval seconds]
[-connect_timeout seconds]
[-dns_expand {yes|no} ]
[-host_selection {sequential|random} ]
[-mft_safe_mode {yes|no} ]
[-file ddname | -encryptedfile ddname [-key key] ]  *
[-port port]
[-system_id ID]
[-userid user [-pwd pwd] ]
[-hostname_retry_count count]
[-outboundip host]
[-server options]
[-uencrypted_codepage codepage]
[-elevate_user_token {yes|no} ]
[-assign_process_to_job option]
[-managerft {yes|no} ]
[-cmdid id]
[-login {yes|no} ]
[-lang language ]
[-level {trace|audit|info|warn|error}[,{time|notime} ]
[-msg_suppression_list list ]
[-tracefilelines lines]
[-trace_table size,{error|always|never} ]
[-ssl_implementation {openssl|system} ]
[-ca_certs ddname [-verify_host_name {yes|no|hostname} ] 
   [-verify_serial_number number] ]
[-cert ddname -private_key ddname [-private_key_pwd password] ]
[-days number]
[-crl ddname]
[-saf_key_ring name [-saf_key_ring_label label] ]
[-ctl_ssl_cipher_list cipherlist]
[-data_ssl_cipher_list cipherlist]
[-default_cipher cipher]
[-forcecomplete {yes|no} ]
[-job_retention seconds]
[-delay seconds]
[-min_ssl_protocol option]
[-networkft {yes|no} ]
[-retry_count number]
[-retry_interval seconds]
[-restart {yes|no|auto} [-managerft {yes|no} [-cmdid id] ] ]
[-server_stop_conditions codes]
[-codepage codepage]
[-compress {yes|no}[,{zlib|hasp} ] ]
[-encrypt {yes|no} ]
[-authenticate {yes|no} ]
[-stdin | -stdout | -stderr]
   [-codepage codepage]
   [-compress {yes|no}[,{zlib|hasp} ] ]
   [-encrypt {yes|no} ]
   [-authenticate {yes|no} ]
   [-localfile ddname]
   [-mode {text|binary}[,{ucs|direct} ] [-trailingspaces {yes|no} ] ]
   [-remotecodepage codepage]
[-exit_code_map map]
[-comment text]

ucmd
{ -help | -version }

* The command file (-file or -encryptedfile) can contain some or all required and/or optional configuration options, including -cmd (or -script) and -host. If a command file is specified on the command line, and it contains the required -cmd (or -script) and -host options, those options do not have to be specified additionally on the command line.

Shutdown Procedure

When the UCMD Manager and UCMD Server are configured to use the network fault tolerant protocol, the z/OS Manager must be shut down properly in order for the UCMD Server and user command to shut down as well. If not properly shut down, the UCMD Server will wait for a period of time for the UCMD Manager to reestablish network connections.

If the UCMD Manager and UCMD Server are not configured to use the network fault tolerant protocol, the z/OS Manager can be shut down with any available method.

Fault Tolerant Shutdown

The z/OS Manager is a z/OS UNIX System Services (USS) application. A shutdown sequence is initiated by sending a USS termination signal to the job. The UCMD Manager detects the signal and promptly sends a terminate message to the UCMD Server. Upon receiving the terminate message, the UCMD Server starts its shutdown sequence.

A termination signal is sent to a z/OS Manager, as shown in the following steps:

D OMVS,U=userid

D OMVS,A=ALL

F BPXOINIT,TERM=pid

Non-Fault Tolerant Shutdown

Since the UCMD Server shutdown sequence is started as soon as a network connection is prematurely closed, the z/OS Manager shutdown can be initiated with any available z/OS job termination method.

The most common and safest method is the CANCEL console command:

C jobname

(jobname is the name of the z/OS Manager batch job to terminate.)