Mandatory : 리눅스 파이프와 리다이렉션 구현하기
- Block/Non-Block, Synchronous/Asynchronous
- Redirection, Here-doc
- 허용함수 정리
- 환경변수 PATH
$> ./pipex file1 cmd1 cmd2 file2
$> < file1 cmd1 | cmd2 > file2
$> ./pipex infile "ls -l" "wc -l" outfile
$> < infile ls -l | wc -l > outfile
$> ./pipex infile "cat" "grep hello" outfile
$> < infile cat | grep hello > outfile
$> ./pipex /dev/urandom "ls -al" "cat" outfile
$> < /dev/urandom ls -al | cat > outfile
$> ./pipex file1 cmd1 cmd2 cmd3 ... cmdn file2
$> < file1 cmd1 | cmd2 | cmd3 ... | cmdn > file2
$> ./pipex infile "cat" "grep hello" "wc -l" outfile
$> < infile cat | grep hello | wc -l > outfile
- support << and >> when the first param is "here_doc"
$> ./pipex here_doc LIMITER cmd cmd1 file
$> cmd << LIMITER | cmd1 >> file
$> ./pipex here_doc limiter "cat" "grep a" outfile
$> cat << limiter | grep a >> outfile