pipex

The pipex project is part of the 42 school curriculum, challenging students to implement a simplified version of the shell command-line construct < file1 cmd1 | cmd2 > file2. This project aims to improve understanding of file descriptors, processes, and the concept of pipes in Unix-like operating systems.

Overview

The pipex program is designed to take two commands as arguments and execute them in a way that mimics the behavior of the shell command < file1 cmd1 | cmd2 > file2. Key features include:

• Piping: Connects the standard output of the first command to the standard input of the second command using pipes.
• Redirection: Redirects the standard input or output to specified files as indicated in the command line.
• Multiple processes: Spawns and manages multiple child processes to execute the given commands in sequence.
• Here documents: Supports the use of here documents as input for the first command.

Usage

1. Clone the project:

git clone https://github.com/seungwonme/pipex.git

2. Navigate to the project directory:

cd pipex

3. Compile the executable:

make

4. Run the program with the desired command-line arguments:

./pipex infile cmd1 cmd2 ... cmdn outfile
# It will execute the following command:
< infile cmd1 | cmd2 | ... | cmdn > outfile

./pipex here_doc <limiter> cmd1 cmd2 ... cmdn outfile
# It will execute the following command:
<< <limiter> cmd1 | cmd2 | ... | cmdn > outfile

Example:

./pipex infile "ls -l" "cat -e" "grep pipex" outfile

• To clean up object files:

make clean

• To delete all build files:

make fclean

• To clean and rebuild the executable:

make re