shellter

Minimal Unix shell written in C++.

Dependencies:

• libboost-regex-dev;
• libfmt8-dev;
• libreadline-dev;
• c++20-compatible compiler (at least gcc version 10.1 or clang version 11.0.0).

Building:

Clone the repo, go in its root directory and run the makefile:

$ git clone https://github.com/niculaionut/shellter.git
$ cd shellter
$ make shellter

Features:

• multi-line commands;
• command history:

[user@host:~]% history
 1  ls -1
 2  echo 2
 3  history

• builtin commands;
• piping:

[user@host:~]% find /usr/include/ -type d | grep boost | wc -l
500

• logical operators:

[user@host:~]% ls | grep -q cpp$ && echo found || echo not found
found

• environment variables:

[user@host:~]% addenv $MYSTR hello
[user@host:~]% ls | grep $MYSTR
helloword.c

• stdin/stdout/stderr redirection:

[user@host:~]% find / -type f 2>no-perms.txt 1>/dev/null || head -n3 < no-perms.txt
find: ‘/.cache’: Permission denied
find: ‘/boot/efi’: Permission denied
find: ‘/run/exim4’: Permission denied