Pipex

A 42 project where we have to imitate shell pipelines and input/output file redirections.

Final score

How to compile

$ git clone https://github.com/alissonmarcs/pipex.git
$ cd pipex
$ make bonus

Compiling with make bonus you will be able to use any number of commands and here_doc.

How to use

Quotes are mandatory when command receive arguments.

$ ./pipex_bonus Makefile "tr A-Z a-z" nl outfile

• Makefile will be input for tr.
• tr A-Z a-z translate all uppercase chars to lower case.
• nl enumerate lines.
• outfile destination file.

$ ./pipex_bonus Makefile "ps aux" nl outfile

• Makefile will be input for ps, but ps doesn't receive input, so it will not be used.
• ps aux list current running processes.
• nl enumerate lines.
• outfile destination file.

$ ./pipex_bonus .gitignore "tr a-z A-Z" nl outfile

• .gitignore will be input for tr.
• tr translate all lowercase chars to uppercase.
• nl enumerate lines.
• outfile destination file.

$ ./pipex_bonus Makefile nl tac "head -25" outfile

• Makefile will be input file for nl.
• nl enumerate lines.
• tac reverse lines.
• "head -25" gets first 25 lines of it's sdtin.
• outfile destination file.

$ ./pipex_bonus Makefile "tr A-Z a-z" nl tac cat "tail -25" outfile

• Makefile will be input file for tr.
• "tr A-Z a-z" translate all uppercase chars to lowercase.
• nl enumerate lines.
• tac reverse lines.
• cat change any data, simply get it's stdin and writes to stdout.
• "tail -25" get last 25 lines from it's stdin.

$ ./pipex_bonus Makefile "ls -la ../../" "tr a-z A-Z" "nl" outfile

• Makefile will be input file for ls, but ls doesn't receive input, so it will not be used.
• "ls -la ../../" long listing of grandfather folder.
• tr a-z A-Z translate all lowercase chars to uppercase.
• nl enumerate lines.
• outfile destination file.

$ ./pipex_bonus here_doc LIMITER "tr a-z A-Z" nl outfile

• when here_doc, user must type the input for first command.
• LIMITER must be typed when user finished to type input data.
• "tr a-z A-Z" translate all lowercase chars to uppercase.
• nl enumerate lines.
• outfile destination file. When here_doc, the output file is open in append mode.

$ ./pipex_bonus here_doc stop nl tac outfile

• here_doc stop enable here_doc and delimiter will be "stop".
• nl enumerate input lines.
• tac reverse input lines.
• outfile destination file, open in append mode.