make && ./minishell
GNU bash, version 5.1.16(1)-release (x86_64-pc-linux-gnu)
bash --posixsudo apt-get install libreadline-dev-
Local variables have been implemented
-
To ensure efficient memory management, dynamically allocated memory is manually freed despite the presence of a garbage collector that only frees all memory at once in case of an unexpected program exit.
-
You can execute a command directly by using the "-c" option
./minishell -c [cmd]- In order to closely mimic the behavior of bash, the signal handling in Minishell changes when launched with a redirect.
if (!isatty(STDIN_FILENO) || !isatty(STDERR_FILENO))
// Different signal behavior
// See : srcs/signals| Relevant tests |
|---|
| Search and launch the right executable (based on the PATH variable or using a relative or an absolute path) |
ls |
.ls |
/ls |
ls -la |
/tmp |
/usr/bin/ls |
cp /usr/bin/ls ./lsCopy → lsCopy → ./lsCopy |
| Handle single quote and double quote |
echo '$PWD' |
echo "$PWD" |
echo '$''PW'D'' |
echo $PW''D'' |
echo ' << (not 'a' here-doc) > (nothing) ""<"" (nothing) >> (nothing)' |
| Implement redirection |
cat < Makefile > out.txt → cat out.txt |
cat < Makefile > out.txt → cat < Makefile >> out.txt → cat out.txt |
cat < thisFileDoesNotExist > out.txt |
touch noRights.txt → chmod 000 noRights.txt → cat < noRights.txt |
ls > $thisVariableDoesNotExist |
< < > >> |
>> < < < |
<< |
>> |
> |
< |
| Implement heredoc |
< Makefile << limiter |
cat << limiter < Makefile |
cat << limiter1 << limiter2 |
echo << limiter |
cat << limiter → $PATH (inside the heredoc) |
cat << "limiter" → $PATH (inside the heredoc) |
cat << 'limiter' → $PATH (inside the heredoc) |
| Implement pipes |
cat | cat | ls |
| ls | ls |
ls | ls | |
ls ||| ls |
sleep 2 | ls |
cat /dev/urandom | head -n 5 |
printf "42\n" | cat | printf "4 8 15 16 23 42\n" | cat |
| Handle environment variables and $? |
ls -wError → echo $? |
thisCommandDoesNotExist → echo $? |
echo $PATH → echo $? |
$SHELL |
| Your shell must implement some builtins |
| → https://github.com/thallard/minishell_tester |
On this project, my teammate and I agreed that we would each make a Minishell. Here is my version.