simple shell is a UNIX command interpreter that replicates core functionalities of the sh shell. This project was developed as part of the third month curriculum at Holberton School, San Francisco.
Clone this repository to your local system and compile using gcc -Wall -Werror -Wextra -pedantic *.c.
- Once in the shell, use exactly like
sh. A list of covered features is provided below. The shell can run in either interactive or non-interactive mode. - Function returns with the specified exit status.
The shell handles command line input, including arguements, without the use of most standard library functions such as printf, strtok, or getline. In addition to running executables in the PATH, the following features are currently implemented.
| Builtin Commands | Functionality |
|---|---|
exit [status] |
Exit shell with specified exit status |
env |
Print list of current environment variables |
setenv |
Set an environment variable |
unsetenv |
Unset an environment variable |
cd |
Change directories |
history |
Prints command history |
help |
Displays help for builtin commands |
alias |
Alias a command as another or print aliases |
| Other Features | Functionality |
|---|---|
Ctrl-D |
End of file - exit shell |
Ctrl-C |
Does not exit shell - (Differs from sh) |
; |
Command separator, allows command chaining |
# |
Comment indicator |
< |
Redirect input |
> |
Redirect output |
<< |
Append input (heredoc) |
>> |
Append output |
- This shell takes input the same as a standard unix shell. After running the executable
hsh, enter desired input and press return. ls -lexit 98cd -
- 0.0.1 - First release - 17 Apr 2019
- 0.0.2 - Second release - 03 Mar 2020
All files were created and compiled on Ubuntu 14.04.4 LTS using GCC 4.8.4 with the following flags: -Wall -Werror -Wextra -pedantic
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