Exam_rank_04 (@42Paris)

About

Third exam of the new 42 cursus. You will have to recode a small shell (cd, execve and pipes).

You can test your own microshell with the tests inside some_tests file and compare your results with bash.

It's really important to protect your syscalls with the fatal function (especially syscalls implicating file descriptors like dup, pipe... They will test your microshell with wrong fds).

Check also if you're not leaking file descriptors with lsof -c microshell (put an infinite loop at the end of your main when testing this). You should have only stdin, stdout and stderr open (respectively 1u, 2u and 3u).

Tests /bin/cat "|" /bin/ls and /bin/cat /dev/urandom "|" /usr/bin/head -c 10 should work like in bash. Look SIGPIPE signal for more information.

• Here is the subject

This project was code for MACOS

Building and running the project

1. Download/Clone this repo

    git clone https://github.com/lucaslefrancq/42_exam_rank_04.git
   

2. cd into the root directory then run make.

    cd 42_exam_rank_04
    make
   

Sources

• Some examples for lsof