New build system + hysh functionality

Src/Hyperion-bash/bin/su

@@ -1,7 +1,7 @@
 --:Minify:--
 local fs = require("sys.fs")
 
-local targetUser = ({...})[1] or "root"
+local targetUser = ({ ... })[1] or "root"
 
 local currentUid = syscall.getuid()
 local currentUser = syscall.getUsername(currentUid) or tostring(currentUid)
@@ -26,7 +26,9 @@ else
             syscall.write(1, "\n")
             break
         elseif ch == "\b" then
-            if #pw > 0 then pw = pw:sub(1, -2); syscall.write(1, "\b \b") end
+            if #pw > 0 then
+                pw = pw:sub(1, -2); syscall.write(1, "\b \b")
+            end
         else
             pw = pw .. ch
             syscall.write(1, "*")
@@ -46,13 +48,13 @@ if currentUid == 0 then
     syscall.setuid(targetUid)
 end
 
-local pwent = syscall.auth_getpasswd(targetUid)
-local shell   = (pwent and pwent.shell)   or "/bin/hysh"
+local pwent   = syscall.auth_getpasswd(targetUid)
+local shell   = (pwent and pwent.shell) or "/bin/hysh"
 local homedir = (pwent and pwent.homedir) or "/"
 
 syscall.chdir(homedir)
-syscall.setEnviron("HOME",  homedir)
-syscall.setEnviron("USER",  targetUser)
+syscall.setEnviron("HOME", homedir)
+syscall.setEnviron("USER", targetUser)
 syscall.setEnviron("SHELL", shell)
 
 local shellText = fs.readAllText(shell)
@@ -63,10 +65,13 @@ if not shellText then
 end
 
 local shellFn, loadErr = load(shellText, "@" .. shell)
+
 if not shellFn then
     print("su: cannot load shell: " .. tostring(loadErr))
     syscall.exit(1)
     return
 end
 
-shellFn()
+syscall.kill(syscall.getppid())
+syscall.spawn(shellFn, targetUser .. ":" .. shell, syscall.getEnviron())
+syscall.exit(0)