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11 Input/Output Overview
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Most programs need to do either input (reading data) or output (writing
data), or most frequently both, in order to do anything useful. The GNU
C Library provides such a large selection of input and output functions
that the hardest part is often deciding which function is most
appropriate!
This chapter introduces concepts and terminology relating to input
and output. Other chapters relating to the GNU I/O facilities are:
* I/O on Streams, which covers the high-level functions that
operate on streams, including formatted input and output.
* Low-Level I/O, which covers the basic I/O and control
functions on file descriptors.
* File System Interface, which covers functions for operating
on directories and for manipulating file attributes such as access
modes and ownership.
* Pipes and FIFOs, which includes information on the basic
interprocess communication facilities.
* Sockets, which covers a more complicated interprocess
communication facility with support for networking.
* Low-Level Terminal Interface, which covers functions for
changing how input and output to terminals or other serial devices
are processed.
Menu
* I/O Concepts Some basic information and terminology.
* File Names How to refer to a file.
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