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samples for easy read and write files

Chapter 3 - Working with Files.


simple_write.c  -  A simple program that uses write.

simple_read.c  -  A simple program that uses read and write.

copy_system.c  - A program that uses low-level system calls to copy one file to another.

copy_block.c  -  An improved version of system.c that copies blocks of data between the files.

copy_stdio.c  -  A program uses library calls to further improve the speed of the above programs by buffering
the file input and output.

printdir.c  -  A program that prints out the contents of the home directory.

printdir2.c  -  An improved version of printdir.c that takes the directory as an argument.

mmap.c  - A program that maps a file into memory as an array and then alters its contents.