Simple Shell - is a Alx school group project. The task is to write a simple UNIX command interpreter.
- Allowed editors:
vi
,vim
,emacs
- All your files will be compiled on Ubuntu 20.04 LTS using
gcc
, using the options-Wall -Werror -Wextra -pedantic -std=gnu89
- All your files should end with a new line
- A
README.md
file, at the root of the folder of the project is mandatory - Your code should use the
Betty
style. It will be checked using betty-style.pl and betty-doc.pl - Your shell should not have any memory leaks
- No more than 5 functions per file
- All your header files should be include guarded
- Use system calls only when you need to (why?)
- Write a
README
with the description of your project - You should have an
AUTHORS
file at the root of your repository, listing all individuals having contributed content to the repository. Format, see Docker
- 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
$
access
(man 2 access)chdir
(man 2 chdir)close
(man 2 close)closedir
(man 3 closedir)execve
(man 2 execve)exit
(man 3 exit)_exit
(man 2 _exit)fflush
(man 3 fflush)fork
(man 2 fork)free
(man 3 free)getcwd
(man 3 getcwd)getline
(man 3 getline)getpid
(man 2 getpid)isatty
(man 3 isatty)kill
(man 2 kill)malloc
(man 3 malloc)open
(man 2 open)opendir
(man 3 opendir)perror
(man 3 perror)read
(man 2 read)readdir
(man 3 readdir)signal
(man 2 signal)stat
(__xstat) (man 2 stat)lstat
(__lxstat) (man 2 lstat)fstat
(__fxstat) (man 2 fstat)strtok
(man 3 strtok)wait
(man 2 wait)waitpid
(man 2 waitpid)wait3
(man 2 wait3)wait4
(man 2 wait4)write
(man 2 write)
Your shell will be compiled this way:
gcc -Wall -Werror -Wextra -pedantic -std=gnu89 *.c -o hsh
Your shell should work like this in interactive mode:
$ ./hsh
($) /bin/ls
hsh main.c shell.c
($)
($) exit
$
But also 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
$