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POSIX file system

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A POSIX file system is a container file in BS2000 with the structure of a UNIX file system (UFS). Like in UNIX systems, it can consist of several file systems. It is hierarchically structured and consists of directories and files (POSIX files).

The root directory, which is marked by a slash (/), is at the top of the hierarchy and the directory structure branches from this point downwards. It is possible to branch from one directory to another directory or to a file, but it is no longer possible to branch from a file.There are no restrictions on either the number of directory levels or on the number of directories and files on a level. For this reason, a POSIX file system can be efficiently structured and organized.

Directories are also referred to as nodes of a POSIX file system. In these nodes, names of files or further directories are located. The user can assign the names for the directories and files, taking due account of the prevailing conventions.

Figure 7: Hierarchical structure of a POSIX file system