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Which data structure is used to maintain file identification in Linux/Unix based system and what are its contents?

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Which data structure is used to maintain file identification in Linux/Unix based system and what are its contents?
posted Feb 27, 2016 by Mohammed Hussain

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1 Answer

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The data structure that is used to maintain the In-Core Inode Information is "Inode Table". This table (logical representation) has the following information abt the file:-
- type of the file
- permissions on the link
- Owner Id
- Group Id
- File Size
- Arrayy of 13 pointers to a file or another entry in the inode table.
Besides these, the UNIX system maintains 2 other data structures namely -
User File Descriptor Table - A per Process table maintains information of open files by single process
PK - PID , FileDescriptor
2. File Table - A Global Table that maintains the information of all the open files.
PK - FileDescriptor

answer Mar 1, 2016 by Manikandan J
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