Alx Africa Software Engineering simple-shell project
0x16. C - Simple Shell
Description
This Simple Shell project is a collaboration between Qayyum Yussuf and Uche okwara precious Who are Software Engineers studing as students of ALX school. This project consists of developing and making our own UNIX command interpreter (Shell).
This Simple_shell program can be compiled and launched from the command line, where its main function is to execute commands read from the standard input.
Shell Compilation
$ gcc -Wall -Werror -Wextra -pedantic *.c -o hsh
Shell execute
./hsh
Commands on shell process
cd - Change directory
env - List the current enviroment variables
exit - exit the shell
pwd - Print the absolute pathname
Files
Description of the files used:
Files Description
_calloc.c Function that allocates memory
_cd.c Function that changes to the directory of the process
_ex.c Function that finds if input is esit, therefore terminates process
_fork.c Function that creates process and executes
_getline.c Function that reads what the user writes
_signal.c Function that handles the SIGINT signal
_writerr.c Function that gets each error
checkbin.c Function that checks if commands exits in the PATH
gridfree.c Function that free an array of arrays
parser.c Function that creates an array of pointers depending on the delimit characters used
sshell.c Main function that starts the shell
shell. h Header file with all the functions prototypes
Examples
Some of the examples of this shell working process:
cd:
^_^ pwd
/home/vagrant/simple_shell
^_^ cd
^_^ pwd
/home/vagrant
^_^
cd error:
^_^ cd hola
./hsh: 1: cd: can't cd to hola
^_^
exit:
^_^ exit 123
vagrant@vagrant-ubuntu-trusty-64:~/simple_shell$ echo $?
123
exit error:
^_^cisfun$ exit hola
./hsh: 2: exit: Illegal number: hola
^_^
Authors
OKWARA UCHE STANLEY
ABDUL-QAYYUM YUSSUF