➜ minishell echo $USER"$"$PWD'$$$$$$$$$$$'USER"$PWD" wlahyani/Users/wlahyani/Desktop/ex$$$$$$$$$$$USER/Users/wlahyani/Desktop/ex ➜ minishell ' "$PWD" ' minishell: syntax error unexpected token \n' ➜ minishell echo ' "$PWD" ' minishell: syntax error unexpected token \n' ➜ minishell echo ' "$PWD" ' '
minishell: syntax error unexpected token \n' ➜ minishell echo ' "$PWD" ' ' minishell: syntax error unexpected token \n' ➜ minishell echo ' "$PWD" minishell: syntax error unexpected token \n' ➜ minishell echo "$PWD" /Users/wlahyani/Desktop/ex ➜ minishell echo '"$PWD"' "$PWD" ➜ minishell echo ' "$PWD"' minishell: syntax error unexpected token \n' ➜ minishell echo ' "$PWD" ' minishell: syntax error unexpected token `\n' ➜ minishell echo ' ›"$PWD" '

bash-3.2$ export a="ls -la" bash-3.2$ $a total 2696 drwxr-xr-x 11 wlahyani 2019 374 Feb 16 23:42 . drwx------ 4 wlahyani 2019 136 Feb 16 22:47 .. drwxr-xr-x 12 wlahyani 2019 408 Feb 16 22:48 .git -rw-r--r-- 1 wlahyani 2019 1525 Feb 16 23:21 Makefile -rw-r--r-- 1 wlahyani 2019 984 Feb 16 22:48 README.md -rw-r--r-- 1 wlahyani 2019 1307414 Feb 16 22:48 en.subject.pdf drwxr-xr-x 3 wlahyani 2019 102 Feb 16 22:48 include -rw-r--r-- 1 wlahyani 2019 1514 Feb 16 22:48 install_brew.sh drwxr-xr-x 83 wlahyani 2019 2822 Feb 16 23:21 lib_ft -rwxr-xr-x 1 wlahyani 2019 53328 Feb 16 23:42 minishell drwxr-xr-x 19 wlahyani 2019 646 Feb 16 23:42 src bash-3.2$ echo "asdads" > $a bash: $a: ambiguous redirect bash-3.2$ cat $a cat: ls: No such file or directory cat: -la: No such file or directory

echo oui | echo non | echo something | grep something ==> oui expect something

=> expand inside heredoc ✅ => signlas ✅ ➜ minishell exit 288 ✅ [1] 18412 segmentation fault ./minishell ✅ => multiple pipes ✅ => heredoc parse delimeter ✅ => $? ✅ => cat < l ✅

=> string parser "\0"

=>export =>env =>builtins

=>➜ minishell ➜ minishell ctrl + c => ➜ minishell < scat segv << l ls | < Makefile cat > file401 | << h ls >> file401 || << q open the heredocs before the syntax error ls > file401 | cat file401 >> file401 hanging ls > file1 | cat file1 ➜ minishell export | grep ads adsvdv=(null) ➜ minishell export test== bash-3.2$ export unset

=> exit status