yush is a simple shell in OCaml + Lex + Yacc. Just a toy for learning ðŸ§
Clone this repository and run make build.
git clone git@github.com:YuigaWada/yush.git && cd yush && make -B build
Alternatively, you can make build this project directly using dune.
dune build
Default $PATH includes below directories.
- /usr/local/bin
- /usr/bin
- /bin
- /usr/sbin
- /sbin
| syntax | done | description |
|---|---|---|
| cd dir | ✅ | Change current directory to dir. |
| cmd1 | cmd2 | ✅ | Redirect stdout of cmd1 to stdin of cmd2. |
| cmd > file | ✅ | Redirect the standard output (stdout) of cmd to a file. |
| cmd n> file | ✅ | Redirect the standard error (stderr) of cmd to file descriptor n. |
| cmd >> file | ✅ | Append stdout of cmd to a file. |
| cmd < file | ✅ | Redirect the contents of the file to the standard input (stdin) of cmd. |
| exec n>&m | ✅ | Make file descriptor n to be a copy of file descriptor m. |
| cmd1 ; cmd2 | Run cmd1 then cmd2. | |
| cmd1 && cmd2 | Run cmd2 if cmd1 is successful. | |
| cmd1 || cmd2 | Run cmd2 if cmd1 is not successful. | |
| cmd & | Run cmd in a subshell. |