Write a simple UNIX command interpreter.
This is collaborative project made by Valentina Zapata and Eduardo Zúñiga, students of Software Engineering at Holberton School. This repository contains the files for Holberton's simple_shell project. It consists of developing and making our own UNIX command interpreter (Shell).
It's a recreation of the sh shell a command line interpreter, this program has the exact same output as sh (/bin/sh) as well as the exact same error output.
There should be one project repository per group. If you clone/fork/whatever a project repository with the same name before the second deadline, you risk a 0% score.
- Unless specified otherwise, your program must have the exact same output as sh (/bin/sh) as well as the exact same error output.
- The only difference is when you print an error, the name of the program must be equivalent to your argv[0] (See below)
Example of error with sh:
$ echo "qwerty" | /bin/sh /bin/sh: 1: qwerty: not found $ echo "qwerty" | /bin/../bin/sh /bin/../bin/sh: 1: qwerty: not found $
Same error with your program hsh:
$ echo "qwerty" | ./hsh ./hsh: 1: qwerty: not found $ echo "qwerty" | ./././hsh ./././hsh: 1: qwerty: not found $
| File | Description |
|---|---|
| AUTHORS | Contains the authors of the project |
| _getenv.c | Contains the function that looks up the environment |
| _putchar.c | Contains the function that writes the character c to stdout |
| _strcat.c | Contains the function that concatenates two strings |
| _strcmp.c | Contains the function that compares two strings |
| _strcpy.c | Contains the function that copies two strings |
| _strlen.c | Contains the function calculates the length of a given string |
| _strncomp.c | Contains the function that compares the characters of two strings |
| execv.c | Function that executes shell commands |
| exit.c | Function to close the shell process |
| length.c | Function that check equals character |
| main.c | Main arguments functions |
| path.c | Function that find the path in the environment |
| shell.c | read line for the keyboard |
| shell.h | Header file with the prototypes |
| token_path.c | Function for split the path |
| tokenizador.c | Function that splits the string entered by the user |
| man_1_simple_shell | file containing the shell man |
$ git clone https://github.com/edwardzuniga/simple_shell.git
$ cd simple_shell/
gcc -Wall -Werror -Wextra -pedantic *.c -o hsh
Use in interactive mode:
$ ./hsh (
$) /bin/ls hsh main.c shell.c ($ ) ($) exit $
Use in non-interactive mode:
$ echo "/bin/ls" | ./hsh hsh main.c shell.c test_ls_2 $ $ cat test_ls_2 /bin/ls /bin/ls $ $ cat test_ls_2 | ./hsh hsh main.c shell.c test_ls_2 hsh main.c shell.c test_ls_2 $
For further information please refer to the man page - accessed in terminal with:
man -l man_1_simple_shell
In the following example we enter the simple shell with the compilation code, then we compile with ./hsh and see what I enter "Cisfun$", then we list the files "ls" and see the path "pwd" , then we exit and return to our default shell
Perhaps several, however it is a project carried out in the learning process of software development, do not hesitate to contact the authors if you have any questions, thank you very much