This is an implementation of a simple bash shell for linux operating systems interaction. It has limited power giving that it can only run simple commands for file management and system navigation.
To start the shell you need to compile the files given in the repository and run the executable. You will see a $ prompt when shell is waiting for a command from the user
gcc -Wall -Werror -Wextra -pedantic *.cThe shell works when commands are input from user. The shell commands take the following syntax:
command name {arguments}Arguments for each command can be reviewed using man command name
Some of the commands that can be execute on the terminal are the following:
- ls - List current directory contents.
- man - Print manual for a command.
- pwd - Print working directory.
- cd - Change directory.
- mkdir - Create a directory.
- echo - Prints text to the terminal window.
- touch - Creates a file.
- mv - Move or rename a file.
- less - View the contents of a text file.
- cat - Read a file, create a file, and concatenates files.
These are the functions that comes with the shell program and are not part of the kernel services.
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exit - exits the shell.
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env - Prints the current environment.
To exit the shell, built-in function exit can be used. End of files commands like ctrl-c and ctrl-d are also allowed.
- simple_shell.c - Main program which supports the prompt and general executions.
- shell.h - Header file of the shell. Contains functions prototypes, definitions and requiered libraries.
- Tokenizer.c - Function to tokenize the standar input lines.
- env_copy.c - Function that makes a copy of the PATH enviromental variable.
- paths.c - Function that searchs for commands in PATH enviromental variable.
- execution.c - Function to create new processes for execution.
- helpers.c - Utility functions to treat strings.
- free_dp.c - Function that frees a double pointer containing elements created with malloc.
Use under your own risk!
- Manuela Espinosa
- Mateo Villada
- Karol Díaz