Basics of UMDT - User Maintained Data table

In February 1989, CICS announced enhancements for the CICS/MVS product and CICS/MVS 2.1. Most notable was the introduction of CICS Data Tables support, either as CICS Maintained Data Tables (CMDT) or User Maintained Data Tables (UMDT). ‘D

I/O redirection using dup() system call

What is a dup() system call. dup() system call in unix systems copies a file descriptor into the first free slot in the private file descriptor table and then returns the new file descriptor to the user. It works for all the file types. The

inode and file descriptor table Interaction

 Inode tables interact with user process specific file descriptor tables and global file tables in Unix File System to facilitate the file handling. In this article we would discuss about these table in detail and build an understandin

Inode - file structure on Unix

Internal representation of a file is called an Inode (contraction of term - index node) which contains all the required information and description of the file data and its layout on disk. This article deals in detail with the informati

Unix File System internals

In Unix based file systems all the entities on disk are treated as a File. The internal representation of a file is called an "inode" (contraction of term - index node) which contains all the required information and description of the fi

Static And Shared C Libraries

C Libraries What is a library: A library is simply a file that contains or rather groups together multiple compiled object code files to a single file that is to be incorporated later into a program. Functions which are

How to revert an atomic changelist using perforce (p4)

If you are working in a professional IT company then it is must that your company must be using some repository software for developement purpose.And most of these repository-softwares have started using softwares, which stores changes in f