ABCs of z/OS System Programming

✍ Scribed by Paul Rogers, Alvaro Salla

• Publisher: IBM Corporation
• Year: 2011
• Tongue: English
• Leaves: 854
• Category: Library

✦ Table of Contents

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Contents
Notices
Trademarks
Preface
The team who wrote this book
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Chapter 1. Products and components
1.1 z/OS UNIX System Services
1.2 z/OS UNIX System Services and z/OS
1.3 z/OS and z/OS UNIX
1.4 Product and component support for z/OS UNIX
1.5 Security Server RACF
1.6 Data Facility System-Managed Storage (DFSMS)
1.7 Transmission Control Protocol/Internet Protocol (TCP/IP)
1.8 System Modification Program Extended (SMP/E)
1.9 System Management Facility (SMF)
1.10 Resource Measurement Facility (RMF)
1.11 Virtual Lookaside Facility (VLF)
1.12 Time Sharing Option/Extended (TSO/E)
1.13 Workload Manager (WLM)
1.14 Tivoli Storage Manager (TSM)
Chapter 2. z/OS UNIX overview
2.1 z/OS UNIX and UNIX applications
2.2 z/OS UNIX terminology overview
2.3 HFS and zFS file system PFSes
2.4 Using z/OS UNIX
2.5 z/OS UNIX System Services
2.6 Physical file systems
2.7 z/OS UNIX file sharing in a sysplex
2.8 z/OS UNIX file systems
2.9 File system data sets
2.10 Root file system
2.11 File and directory permission bits
2.12 MVS data sets versus file system files
2.13 zFS or HFS data sets
2.14 z/OS UNIX components
2.15 z/OS UNIX programs (processes)
2.16 Create a process
2.17 z/OS UNIX processes
2.18 z/OS UNIX interactive interfaces
2.19 ISPF Option 6
2.20 ISHELL command (ish)
2.21 User’s files and directories
2.22 OMVS shell session
2.23 OMVS command shell session
2.24 ls -al command - list files in the root
2.25 ISPF edit mode for a z/OS UNIX file
2.26 ISPF edit mode for a z/OS UNIX file
2.27 Specifying the z/OS UNIX path name
2.28 ISPF ENQs on z/OS UNIX files
2.29 Support for editing ASCII data
2.30 Handling line feed characters
2.31 Direct login to shell
2.32 Telnet access to z/OS UNIX
Chapter 3. z/OS UNIX System Services preinstallation requirements
3.1 Customization of the root
3.2 Installing z/OS using ServerPac
3.3 Installing z/OS using CBPDO
3.4 ServerPac and CBPDO
3.5 z/OS UNIX System Services installation
3.6 z/OS UNIX security
3.7 RACF definitions
3.8 RACF OMVS segments
3.9 OMVS segment fields
3.10 UNIX security
3.11 z/OS UNIX superuser
3.12 RACF commands and user IDs
3.13 RACF commands to define groups
3.14 RACF commands to define users
3.15 LU and LG command examples
3.16 Define a terminal group name
3.17 TSO/E support
3.18 User access to TSO/E commands
Chapter 4. z/OS UNIX System Services installation
4.1 z/OS UNIX PARMLIB - PROCLIB members
4.2 IEASYSxx PARMLIB member
4.3 z/OS UNIX minimum mode
4.4 Minimum mode: TFS
4.5 z/OS UNIX full-function mode
4.6 z/OS HFS root
4.7 zFS with z/OS V1R7
4.8 HFS or zFS data sets
4.9 Set data set type
4.10 Choosing zFS
4.11 ServerPac changes if using zFS
4.12 UNIX utilities: TSO/E commands
4.13 UNIX commands to move and copy data
4.14 The pax and tar utilities
4.15 ServerPac z/OS UNIX installation
4.16 Non-volatile root file system
4.17 Installation of other products
4.18 z/OS UNIX System Services installation
Chapter 5. z/OS UNIX shell and utilities
5.1 The z/OS UNIX shell
5.2 Input, output, errors with UNIX shell
5.3 Accessing the z/OS UNIX shell
5.4 Controlling session resources
5.5 Dynamic /dev
5.6 Invoking the shell via TSO/E
5.7 Invoking the shell via rlogin or telnet
5.8 rlogin and telnet access
5.9 Customizing z/OS UNIX initialization
5.10 Initializing z/OS UNIX
5.11 Environment variables
5.12 Environment variables
5.13 The /etc/init.options file
5.14 The etc/rc file
5.15 The /etc/inittab file with z/OS V1R8
5.16 The _BPXK_INITTAB_RESPAWN variable
5.17 Rules for coding /etc/inittab
5.18 Customizing the OMVS command
5.19 Shell environment variables
5.20 Customizing your shell environment
5.21 Global variables in /etc/profile
5.22 User-defined settings
5.23 Setting the time zone
5.24 Customizing the C89/CC compilers
5.25 Code page tables
5.26 Specifying a code page
5.27 Internationalization variables (locales)
5.28 Setting the region size
5.29 Setting up printers for shell users
5.30 Installing books for OHELP
5.31 Using the man command
5.32 Enabling various tools
5.33 SVP for z/OS UNIX and tools
5.34 Setup Verification Program (SVP)
Chapter 6. Security customization
6.1 RACF OMVS segments
6.2 z/OS UNIX UIDs and GIDs
6.3 z/OS UNIX users and groups
6.4 BPXROOT user ID
6.5 Superuser with appropriate authority
6.6 Commands for superusers
6.7 z/OS UNIX security and RACF profiles
6.8 z/OS UNIX security: BPX.SUPERUSER
6.9 z/OS UNIX superuser granularity
6.10 Resource names: UNIXPRIV
6.11 z/OS UNIX UNIXPRIV class profiles
6.12 Assigning UIDs
6.13 Shared UID prevention
6.14 Automatic UID and GID assignment
6.15 Automatic assignment requirements
6.16 Automatic assignment examples
6.17 Automatic assignment with RRSF
6.18 z/OS UNIX security: File security packet
6.19 Octal values for permission bits
6.20 Data set security versus file security
6.21 z/OS UNIX user’s security environment
6.22 Access checking flows
6.23 File authorization checking flow
6.24 POSIX standard and UNIX ACLs
6.25 Limitations of current permission bits
6.26 FSPs and ACLs
6.27 Access control list table
6.28 File authorization check summary
6.29 Profiles in UNIXPRIV class
6.30 Profiles in UNIXPRIV class (2)
6.31 RACF RESTRICTED attribute
6.32 z/OS UNIX file access checking
6.33 RESTRICTED user profile
6.34 Restricted user access checking
6.35 Access checking with ACLs (1)
6.36 Access checking with ACLs (2)
6.37 Create ACLs
6.38 ACL types
6.39 OMVS shell commands for ACLs
6.40 Create ACLs for a specific directory
6.41 Create an access ACL
6.42 Display the access ACL
6.43 Create a directory default ACL
6.44 Create a file default ACL
6.45 Creating all ACL types
6.46 Using the ISHELL panel
6.47 Create an access ACL using ISHELL
6.48 File attributes panel for /u/harry
6.49 File attributes panel showing ACLs
6.50 Select option to create an access ACL
6.51 Create an access ACL
6.52 Add an access ACL
6.53 Access ACL after creation
6.54 ACL inheritance: New directory/new file
6.55 Multilevel security with z/OS V1R5
6.56 Multilevel security (MLS)
6.57 MLS support for z/OS UNIX
6.58 Mandatory access control (MAC)
6.59 Discretionary access control (DAC)
6.60 SECLABELs and MAC
6.61 Special SECLABELs and definitions
6.62 SYSMULTI SECLABEL
6.63 z/OS UNIX and SECLABELs
6.64 Understanding UMASK
6.65 Displaying the UMASK
6.66 Default permissions and UMASK
6.67 Example of creating a new file
6.68 Can user JOE access the file
6.69 Can user ANN copy the file
6.70 Setting file permissions
6.71 Setting file permissions
6.72 List file and directory information
6.73 Introducing daemons
6.74 z/OS UNIX daemons
6.75 UNIX-level security for daemons
6.76 z/OS UNIX security: BPX.DAEMON
6.77 RACF program control
6.78 z/OS UNIX-level security for daemons
6.79 Start options for daemons
6.80 Define daemon security
6.81 Auditing options for z/OS UNIX
6.82 File-based auditing
6.83 Audit z/OS UNIX events
6.84 Chaudit command
6.85 List audit information for files
6.86 Auditing reports
6.87 Maintain z/OS UNIX-level security
6.88 Setting up z/OS UNIX (1)
6.89 Setting up z/OS UNIX (2)
6.90 Setting up z/OS UNIX (3)
6.91 Setting up z/OS UNIX (4)
6.92 Setting up z/OS UNIX (5)
6.93 RACF definitions for zFS
6.94 UNIXPRIV class with z/OS V1R3 and zFS
6.95 List current user IDs with the ISHELL
6.96 The BPXBATCH utility
6.97 The BPXBATCH job
6.98 BPXBATCH and shell commands
Chapter 7. zFS file systems
7.1 zSeries File System (zFS)
7.2 zFS compatibility mode aggregate
7.3 BPXPRMxx definitions for zFS
7.4 zFS colony address space
7.5 HFS data sets and zFS data sets
7.6 zFS utilities and commands
7.7 zfsadm command
7.8 Allocate Linear VSAM data set
7.9 Create the aggregate from ISHELL
7.10 Format VSAM space - create aggregate
7.11 Format the aggregate
7.12 Ioeagfmt successful messages
7.13 Grow an aggregate
7.14 Dynamic aggregate extension
7.15 The -grow option
7.16 -grow option for formatting
7.17 Mounting the file system
7.18 ISHELL support for zFS
7.19 Panel of attached zFS aggregates
7.20 Display aggregate attributes
7.21 Display attached aggregates
7.22 List file systems
7.23 zFS aggregate space commands
7.24 Command for aggregate display
7.25 zFS threshold monitoring space usage
7.26 Dynamic configuration parameters
7.27 zfsadm configquery command options
7.28 zfsadm config command options
7.29 Defining IOEFSPRM options
7.30 Logical PARMLIB support
7.31 Specifying PARMLIB members
7.32 Add a volume to a zFS aggregate
7.33 zFS migration considerations
7.34 HFS/zFS as generic file system type
7.35 Migration considerations
7.36 Migration tool
7.37 Migration checks file system type
7.38 Migration tool enhancements with APAR OA18196
7.39 REXX exec - BPXWH2Z
7.40 BPXWH2Z panels
7.41 Space allocations - HFS versus zFS
7.42 Using the migration tool
7.43 BPXWH2Z panels
7.44 Using SMS if required
7.45 Migrate in the foreground
7.46 Migration steps
7.47 Migration steps
7.48 Migration steps continued
7.49 Alter allocation parameters panel
7.50 APAR OA18196 - Exact data set match
7.51 Migrating a list of data sets
7.52 Data set list displayed
7.53 Health Checker USS_HFS_DETECTED
7.54 Health Checker USS_HFS_DETECTED
7.55 Check with RUN_ON_MOUNT=YES
7.56 Special characters in zFS aggregates
7.57 BPXMTEXT shell command
Chapter 8. File sharing in a sysplex
8.1 Shared file systems in a sysplex
8.2 Sysplex environment setup
8.3 File systems in a shared sysplex
8.4 Multiple systems: Different versions
8.5 Update BPXPRMxx for sysplex
8.6 OMVS couple data set
8.7 OMVS couple data set commands
8.8 D XCF,COUPLE,TYPE=BPXMCDS
8.9 Change to the SETXCF command
8.10 New message for command failure
8.11 File sharing in a sysplex
8.12 Mounting shared sysplex file systems
8.13 Accessing shared sysplex file systems
8.14 Shared file system AUTOMOVE takeover
8.15 Moving file systems in a sysplex
8.16 Requests to LFS to PFS to files
8.17 Systems accessing file systems
8.18 zFS sharing mode terminology
8.19 Defining zFS as sysplex-unaware
8.20 zFS File systems with APAR OA29712
8.21 Defining zFS as sysplex-aware
8.22 APAR OA29619
8.23 New zFS configuration options (OA29619)
8.24 Admin levels in a mixed sysplex
8.25 Defing zFS as syplex-aware
8.26 Using the sysplex=filesys parameter
8.27 Using the sysplex=filesys parameter
8.28 The sysplex_filesys_sharemode parameter
8.29 sysplex_filesys_sharemode considerations
8.30 sysplex_filesys_sharemode considerations
8.31 zFS mixed environment
8.32 zFS cache management
8.33 zFS sysplex-aware on a file system basis
8.34 Automatic movement of file systems
Chapter 9. Managing file systems
9.1 Hierarchical file system (HFS)
9.2 File linking
9.3 Hard links
9.4 Symbolic links
9.5 External links
9.6 File system structure
9.7 Temporary directory space
9.8 Temporary file system (TFS)
9.9 Colony address space
9.10 Mounting file systems
9.11 Mount and unmount
9.12 Managing user file systems
9.13 User file systems: Direct mount
9.14 Mounting file systems
9.15 Option 3: Mount
9.16 Automount facility
9.17 Automount setup
9.18 Generic match on lowercase names
9.19 Automount facility overview
9.20 Activating automount
9.21 SETOMVS RESET=xx implementation
9.22 Issue the SETOMVS command
9.23 Updating an existing automount policy
9.24 Example of new options
9.25 One auto.master for a sysplex
9.26 HFS to zFS automount
9.27 HFS to zFS automount
9.28 Automount migration considerations
9.29 How to mount zFS file systems
9.30 Using direct mount commands
9.31 Mounting zFS file systems
9.32 MOUNT commands
9.33 zFS file system clone
9.34 Backup file system - zFS clone
9.35 zFS clone mounted
9.36 Using the clone
9.37 Mounting File Systems - (HFS - zFS)
9.38 MOUNT command options
9.39 UNMOUNT option
9.40 UNMOUNT option support
9.41 UNMOUNT option support
9.42 Mount file system panel
9.43 Set AUTOMOVE options
9.44 AUTOMOVE system list (syslist)
9.45 AUTOMOVE parameters for mounts
9.46 AUTOMOVE wildcard support
9.47 AUTOMOVE wildcard examples
9.48 Stopping zFS
9.49 Restarting the PFS
9.50 Mounting file systems with SET OMVS
9.51 Messages from shutdown of a ZFS single system
9.52 Messages for the restart of ZFS
9.53 Shutdown and recovery scenarios
9.54 zFS commands in a sysplex
9.55 zfsadm command changes for sysplex
9.56 zfsadm command changes
9.57 Configuration options
9.58 Command forwarding support
9.59 Indirect volsers with zFS data sets
9.60 Using indirect volume serials with cloned zFS data sets
9.61 Define a VSAM LDS and format
9.62 Delete the data set and IDCAMS DEFINE
9.63 Centralized BRLM support
9.64 Distributed BRLM
9.65 Define BRLM option in CDS
9.66 BRLM problems in a sysplex
9.67 z/OS V1R8 BRLM recovery of locks
9.68 File system access
9.69 File access
9.70 List file and directory information
9.71 File security packet - extattr bits
9.72 Extended attributes
9.73 APF-authorized attribute
9.74 Activate program control
9.75 Shared address space attribute
9.76 Shared library attribute
9.77 File format attribute
9.78 Extended attribute command example
9.79 Sticky bit
9.80 Set the UID/GID bit
Chapter 10. Overview of TCP/IP
10.1 Introduction to TCP/IP
10.2 TCP/IP terminology
10.3 IPv4 addressing
10.4 IPv6 addresses
10.5 User login to the z/OS UNIX shell
10.6 Resolver address space
10.7 TCPDATA search order
10.8 Create configuration files used by TCP/IP
10.9 Customize the TCP/IP profile data set
10.10 Customize TCPDATA
10.11 z/OS IP search order
10.12 z/OS IP search order (2)
10.13 Customize the TCP/IP procedure
10.14 Customizing PARMLIB members for TCP/IP
10.15 PARMLIB members to customize for TCP/IP
10.16 RACF customization for TCP/IP
10.17 Customizing TCP/IP
10.18 TCP/IP shell commands
Chapter 11. TCP/IP applications
11.1 Overview of z/OS UNIX data access
11.2 Sockets
11.3 z/OS Communications Server
11.4 z/OS UNIX sockets support
11.5 Customizing sockets
11.6 Logging in to the z/OS UNIX shell
11.7 Using inetd - master of daemons
11.8 Customize inetd
11.9 Customize inetd (2)
11.10 Login to a Unix system
11.11 rlogin to z/OS UNIX services
11.12 Activating z/OS UNIX rlogin daemon
11.13 Comparing shell login methods
11.14 Define TCP/IP daemons
11.15 The syslogd daemon
11.16 The FTPD daemon
11.17 z/OS IP search order for FTP
11.18 z/OS IP search order for /etc/services
11.19 Start the TCP/IP daemons
11.20 Message integration support
11.21 Message routing to z/OS
11.22 syslogd command options
11.23 syslogd defined instances
11.24 syslogd configuration file
11.25 Start procedure for syslogd
11.26 syslogd availability considerations
Chapter 12. z/OS UNIX PARMLIB members
12.1 BPXPRMxx PARMLIB member
12.2 BPXPRMFS PARMLIB member
12.3 BPXPRMxx control keywords
12.4 BPXPRMxx PARMLIB member
12.5 Controlling the number of processes
12.6 Resource limits for processes
12.7 MAXFILEPROC statement
12.8 Setting file descriptors
12.9 Setting file descriptor for a single user
12.10 Display BPXPRMxx limits
12.11 Memory mapped files
12.12 Controlling thread resources
12.13 Creating a process using fork()
12.14 Values for forked child process
12.15 Starting a program with exec()
12.16 Values passed for exec() program
12.17 z/OS UNIX processes get STEPLIBs
12.18 Locating programs for z/OS UNIX processes
12.19 Shared pages for the fork() function
12.20 Spawn function
12.21 Interprocess communication functions
12.22 Address Space Memory Map z/OS V1R5
12.23 Control IPC resources
12.24 Kernel support for IBM 5.0 JVM
12.25 Interprocess communication signals
12.26 Pipes
12.27 Other BPXPRMxx keywords
12.28 More BPXPRMxx parameters
12.29 FILESYSTYPE statement
12.30 FILESYSTYPE and NETWORK
12.31 ROOT and MOUNT statements
12.32 Examples of MKDIR in BPXPRMxx
12.33 Allocating SWA above the line
12.34 z/OS UNIX Web site
Chapter 13. Maintenance
13.1 Example of SMP/E SMPMCS
13.2 Active root file system
13.3 Inactive root file system (clone)
13.4 /SERVICE directory
13.5 Sample SMP/E DDDEFs
13.6 Prepare for SMP/E
13.7 SMP/E APPLY process
13.8 Supporting multiple service levels
13.9 Supporting multiple service levels (2)
13.10 ISHELL display of root
13.11 The chroot command
13.12 Testing a root file system
13.13 Testing the updated root
13.14 Dynamic service activation
13.15 Dynamic service activation commands
13.16 Using the new service
13.17 Deactivate service
13.18 Display service
Chapter 14. z/OS UNIX operations
14.1 Commands to monitor z/OS UNIX
14.2 Display summary of z/OS UNIX
14.3 Display z/OS UNIX options
14.4 Display BPXPRMxx limits
14.5 Display address space information
14.6 Display process information
14.7 Display the kernel address space
14.8 z/OS V1R7 command options
14.9 Mount error messages displayed
14.10 Mount failure messages
14.11 Stopping BPXAS address spaces
14.12 LFS soft shutdown
14.13 z/OS V1R8 file system shutdown
14.14 Options with the D OMVS,F command
14.15 Options with the D OMVS,F command
14.16 New command examples
14.17 New command examples
14.18 New command examples
14.19 z/OS UNIX shutdown
14.20 Recommended shutdown procedures
14.21 Application registration
14.22 Display application registration
14.23 F OMVS,SHUTDOWN
14.24 Blocking processes completion
14.25 Shutdown processing completion
14.26 Shutdown for permanent processes
14.27 Shutdown processing final cleanup
14.28 F OMVS,RESTART
14.29 Alternate sysplex root
14.30 Defining an alternate root and mount
14.31 BPXPRMxx parmlib member - ALTROOT
14.32 Display information about processes
14.33 Stop a process
14.34 Superkill function
14.35 Superkill example
14.36 Changing OMVS parameter values
14.37 Manage interprocess communication
14.38 System problems
14.39 z/OS UNIX abends and messages
14.40 USS errors and codes
14.41 CTIBPX00 and CTCBPXxx
14.42 Tracing z/OS UNIX events
14.43 Debugging a z/OS UNIX problem
14.44 IPCS OMVSDATA reports
Chapter 15. z/OS UNIX shell and programming tools
15.1 Language Environment run-time library
15.2 Using pre-LE run-time libraries
15.3 Overview of c89/cc/c++
15.4 Customization of /etc/profile for c89/cc/c++
15.5 Compile, link-edit, and run
15.6 Customization of Java for z/OS
15.7 Java virtual machine
15.8 Management of software and the make utility
15.9 The dbx debugger
15.10 The dbx debugger
15.11 Introduction to shells
15.12 REXX, CLISTs, and shell scripts
15.13 Shell script syntax
15.14 BPXBATCH enhancements
15.15 BPXBATCH implementation
15.16 BPXBATCH summary
15.17 TSO/E ALLOCATE command for STDPARM
15.18 STDERR and STDOUT as MVS data sets
15.19 BPXBATCH sample job
15.20 Child process created for MVS data sets
15.21 BPXBATCH utility
Chapter 16. Performance, debugging, recovery, and tuning
16.1 z/OS UNIX performance overview
16.2 WLM in goal mode
16.3 Defining service classes
16.4 Workload Manager service classes
16.5 Subsystem type panel
16.6 WLM work qualifiers
16.7 OMVS work qualifiers
16.8 Defining classification rules
16.9 Classification rules
16.10 Classification rules for STC
16.11 Virtual lookaside facility (VLF)
16.12 VLF for z/OS UNIX
16.13 COFVLFxx updates for z/OS UNIX
16.14 AIM Stage 3
16.15 Further tuning tips
16.16 zFS performance tuning
16.17 zFS cache
16.18 zFS cache locations
16.19 Metadata backing cache
16.20 Performance APIs
16.21 Performance monitoring APIs
16.22 zfsadm query command
16.23 The IOEZADM utility from TSO for commands
16.24 Directory cache
16.25 Directory caching display tool
16.26 File system monitoring tool (FSMON)
16.27 The zfsadm query -iobyaggr command
16.28 SMF recording
16.29 SMF 92 subtype 14 enhancement
16.30 RMF reporting
16.31 RMF Monitor III support for zFS
16.32 zFS access to file systems
16.33 RMF Overview Report Selection Menu
16.34 zFS Summary Report
16.35 zFS Summary I/O details by type
16.36 User and vnode cache detail
16.37 DFSMSdss dump and restore for zFS file systems
16.38 UNQUIESCE command
16.39 zFS recovery support
16.40 zFS aggregate corruption
16.41 Debugging data sets
16.42 zFS hang detection
16.43 zFS hang detection
16.44 z/OS UNIX Internet information
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