LocalazyLocalazy

Control Language

Control Language, or CL, is a programming language used on IBM mainframe operating systems. It is designed for system administration and enables the user to control the system, create and run programs, and manage files. CL is a command-driven language, meaning that commands are issued to the operating system to perform specific tasks. These commands can be issued interactively, or they can be stored in a CL program, which is a series of CL commands that can be executed as a unit. CL programs are executed by the operating system's CL interpreter, which is a program that reads and executes CL commands. The CL interpreter is a part of the operating system's kernel. The first thing you need to do to start using CL is to create a CL program. This is done by creating a text file that contains the CL commands you want to execute. The file must have a ".cl" extension. Once you have created your CL program, you can execute it by issuing the following command to the CL interpreter: /path/to/cl/interpreter /path/to/cl/program The "/path/to/cl/interpreter" is the path to the CL interpreter on your system. The "/path/to/cl/program" is the path to the CL program you want to execute. You can also execute CL programs interactively by starting the CL interpreter and then typing the CL commands you want to execute. To do this, issue the following command to the operating system: /path/to/cl/interpreter The "/path/to/cl/interpreter" is the path to the CL interpreter on your system. Once the CL interpreter is started, you will see a ">" prompt. At this prompt, you can type CL commands and they will be executed immediately. To exit the CL interpreter, type the "exit" command. Now that you know how to create and execute CL programs, let's take a look at some of the most commonly used CL commands. The "WRKOBJ" command is used to list the objects in a library. For example, to list the objects in the "MYLIB" library, you would issue the following command: WRKOBJ MYLIB The "CRTLIB" command is used to create a library. For example, to create the "MYLIB" library, you would issue the following command: CRTLIB MYLIB The "DLTLIB" command is used to delete a library. For example, to delete the "MYLIB" library, you would issue the following command: DLTLIB MYLIB The "ADDLIBLE" command is used to add a library to the list of libraries that the operating system searches when it is looking for an object. For example, to add the "MYLIB" library to the list of libraries that the operating system searches, you would issue the following command: ADDLIBLE MYLIB The "WRKLIB" command is used to list the libraries that are currently in the list of libraries that the operating system searches. For example, to list the libraries in the list of libraries that the operating system searches, you would issue the following command: WRKLIB The "RMVLIBLE" command is used to remove a library from the list of libraries that the operating system searches. For example, to remove the "MYLIB" library from the list of libraries that the operating system searches, you would issue the following command: RMVLIBLE MYLIB The "CRTPGM" command is used to create a program. For example, to create the "MYPGM" program, you would issue the following command: CRTPGM MYPGM The "DLTPGM" command is used to delete a program. For example, to delete the "MYPGM" program, you would issue the following command: DLTPGM MYPGM The "STRPGM" command is used to start a program. For example, to start the "MYPGM" program, you would issue the following command: STRPGM MYPGM The "ENDPGM" command is used to end a program. For example, to end the "MYPGM" program, you would issue the following command: ENDPGM MYPGM The "DSPOBJD" command is used to display the details of an object. For example, to display the details of the "MYLIB" library, you would issue the following command: DSPOBJD MYLIB The "DSPLIB" command is used to display the contents of a library. For example, to display the contents of the "MYLIB" library, you would issue the following command: DSPLIB MYLIB The "DSPFD" command is used to display the details of a file. For example, to display the details of the "MYFILE" file, you would issue the following command: DSPFD MYFILE The "CPYF" command is used to copy a file. For example, to copy the "MYFILE" file to the "MYFILE2" file, you would issue the following command: CPYF MYFILE MYFILE2 The "DLTF" command is used to delete a file. For example, to delete the "MYFILE" file, you would issue the following command: DLTF MYFILE