Definition

Using C’s Standard Library

These functions are part of glibc on Linux, they are implemented using Linux system calls.

C’s stdio defines the notion of a stream

• A way of reading or writing a sequence of characters to and from a device.
• Can be either text or binary, linux does not distinguish
• Is buffered by default, libc reads ahead of your program
• Three streams provided by default: stdin, stdour, stderr
  • you can open additional streams to read and write to files
• C streams are manipulated with a FILE* pointer, which is defined in stdio.h

cp-example.c

Using POSIX