42-shellWeDance

• Bash Shell 만들기 프로젝트

🚴‍♀️실행

> make
> ./minishell

• Now, you can use our ShellWeDance

⌨️ 사용할 수 있는 Command

export

>> export ABC="DEF"
>> echo $ABC
DEF

unset

• unset something after export

>> unset ABC // you have to export ABC before unset
>> echo $ABC
// you will see blank

env

>> env
// you can see all enviroment values

cd

>> mkdir something_new
>> cd something_new
>> vi test.c
// write c program and save
>> gcc test.c
>> ls
a.out   test.c
>> ./a.out
I love my minishell
>> cd ..
>> rm -rf something_new

>> cd // move to home directory

>> cd - // back to last location

pwd

>> pwd
/Users/username/42-shellWeDance

echo

>> echo ""''""''"hello"
hello
>> echo "''''"hello
hello
>> echo "hello'
ERROR: INVALID QUOTE PAIR

exit

>> ./minishell
>> ./minishell
>> exit
>> exit
// still in our shell

Builtin Commands

• Find built in command

>> whereis ls
/bin/ls
>> cd /bin
>> ls -1F // show excute files one by one
[*
bash*
cat*
chmod*
cp*
csh*
dash*
date*
dd*
df*
echo*
ed*
expr*
hostname*
kill*
ksh*
launchctl*
link*
ln*
ls*
mkdir*
mv*
pax*
ps*
pwd*
rm*
rmdir*
sh*
sleep*
stty*
sync*
tcsh*
test*
unlink*
wait4path*
zsh*

ls

>> ls
// you can see your current location's files and directories

• You can use Options(ls -al)
• You can test with Pipe(ls -al | grep 'web')

그 외 기능

HISTORY

• ⬆️(UP) & ⬇️(DOWN) : You can see previously entered commands

SIGINT(^C)

• Terminal Interrupt character

>> hello // if you type ^C, just move to next line(you can't see anything)
>> // same result in empty line
>> 

EOF(^D)

>> asdfasdf // if you type ^D, nothing happends
>> exit // type ^D in empty line, it exits the shell.

SIGQUIT(^)

>> cd // move to home directory
>> find . // will make endless output
(... endless output ...) // if you want to stop this process, type ^\
Quit: 3 // process will end with this sentence
>>