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File Access

In: Computers and Technology

Submitted By bane
Words 654
Pages 3
File Access

Computers have become an important tool for the companies. They are used as time clocks, keep track of inventory, to communicate with customers and to do research. In some cases, the computer is used to assign tasks and inform employees of upcoming events. Though computers are good tool and resource, there is the potential an employee may misuse or access files they have no clearance to access. For this reason there is a need to restrict access.
If a company has 5000 employees who have access to the computer system and there is a need to restrict 10 users from accessing a specific file, there is a need to establish protocols to prevent access. How this is done differs in each operating system. In Unix there are ways to set parameters for the 4990 users to access a single file. These are set within the types of files. They are called regular, directory, special, named pipes, links and symbolic links.
Unix operating systems operate these files and routes them into a uniformed system that operates in the background supporting files and giving disk space as needed for files. This is done by using inode (Index node) which controls information the system needed for a specific file. Multiple files can be connected to one inode, but if active the inode will only be associated with one file and a file will be controlled by one inode.
A file’s attributes, permissions, and control information are stored within the inode. In the FreeBSD inode for example has a structure that includes the type and access mode, file owner and group-access identifiers, block points and physical blocks of the file. These are used in file allocation, directories and volume structure. This scheme is part of the Unix file access control The file access control is how a user is allowed to have access to a specific file. In this instance 4990 out of 5000 are to have...

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