Feat(rc): added subshell commands and cd builtin

Slowly chipping away at a decent feature list.
Subshell commands are executed by @{ ... }.

1 files changed, 8 insertions, 0 deletions

diff --git a/sys/cmd/rc/lex.c b/sys/cmd/rc/lex.c
index 06737ba..4325882 100644
--- a/sys/cmd/rc/lex.c
+++ b/sys/cmd/rc/lex.c
@@ -191,6 +191,14 @@ yylex(void)
         put1('&');
         return '&';
 
+    case '@':
+        put1('@');
+        return Tsubshell;
+
+    case '!':
+        put1('!');
+        return Tbang;
+
     case '$':
         if(nextis('#')){
             put2('$','#');