The purpose of this project is the discovery in detail UNIX mechanism - pipe.
The program pipex should repeat the behaviour of the next shell command
$> < file1 cmd1 | cmd2 > file2and looks like this:
$> ./pipex file1 cmd1 cmd2 file2All errors like: wrong commands, permission to files and etc, need be handle.
Program need handle multiple pipes
$> < file1 cmd1 | cmd2 | cmd3 | ... | cmdn > file2
$> ./pipex file1 cmd1 cmd2 cmd3 ... cmdn file2Support << and >>, when instead of file1 ishere_doc.
$> cmd1 << LIMITER | cmd2 >> file2
$> ./pipex here_doc LIMITER cmd1 cmd2 file2

