Pipex

Usage

Pipex is a program that handles pipes and redirections in Unix / Linux systems.

For the mandatory part :

 make
 ./pipex infile cmd_1 cmd_2 outfile

For the bonus part :

 make
 ./pipex infile cmd_1 ... cmd_n outfile

The program supports heredocument too, here is the syntax that should be given to the program :

 ./pipex here_doc DELIMITER cmd_1 ... cmd_n outfile

In the mandatoy part, I've created one pipe (pipe(2)) to communicate between the two child processes. Then, i forked (fork(2)) twice in the parent process, and i wait for the child processes before returning zero upon successful completion.

Making a command write its output in the pipe, instead of STDOUT_FILENO, is done by using the dup2(2) function.

Visualisation On How To Handle A Single Pipe :

Bonus

For the bonus part, we have to handle multiple pipes, and « and » when the first parameter is "here_doc".

This command:

 ./pipex file1 cmd1 cmd2 cmd3 ... cmdn file2

Should behave like :

 < file1 cmd1 | cmd2 | cmd3 ... | cmdn > file2

And this :

 ./pipex here_doc LIMITER cmd cmd1 file

Should behave like

$> cmd << LIMITER | cmd1 >> file

Visualisation On How To Handle Multiple Pipes :

This project is licensed under the MIT license