1 files changed, 17 insertions, 6 deletions

diff --git a/syntax.y b/syntax.y
index 5f33c9a..a53537a 100644
--- a/syntax.y
+++ b/syntax.y
@@ -12,7 +12,7 @@
 }
 
 %token <str> WORD STRING error FD_REDIRECT
-%token NEWLINE PIPE AND OR REDIRECT_IN REDIRECT_OUT BACKGROUND
+%token NEWLINE PIPE AND OR REDIRECT_IN REDIRECT_OUT BACKGROUND LPAREN RPAREN APPEND
 
 %type <cmd> line command part runcommand
 %type <cmdType> separator
@@ -32,10 +32,13 @@ line:
 runcommand:
     command NEWLINE {
         $$ = $1;
-        runcmd($$);
+        runCmd($$);
+        showPrompt();
+    }
+    | NEWLINE {
+        $$ = NULL;
         showPrompt();
     }
-    | NEWLINE { $$ = NULL; }
     ;
 
 command:
@@ -43,11 +46,14 @@ command:
         $$ = $1;
     }
     | part separator command {
-        $$ = newcmd();
+        $$ = newCmd();
         $$->type = $2;
         $$->left = $1;
         $$->right = $3;
     }
+    | LPAREN command RPAREN {
+        $$ = $2;
+    } 
     ;
 
 separator:
@@ -65,7 +71,7 @@ part:
         $$->args[$$->argc] = NULL;
     }
     | WORD {
-        $$ = newcmd();
+        $$ = newCmd();
         $$->args = malloc(2 * sizeof(char *));
         $$->args[$$->argc++] = $1;
         $$->args[$$->argc] = NULL;
@@ -78,9 +84,14 @@ part:
         $$ = $1;
         $$->redirectFile[1] = $3;
     }
+    | part APPEND WORD {
+        $$ = $1;
+        $$->redirectFile[1] = $3;
+        $$->redirectFD[1] = -1;
+    }
     | part FD_REDIRECT {
         $$ = $1;
-        $$->redirectFD[$2[0]-'0']=$2[3]-'0';
+        $$->redirectFD[$2[0] - '0'] = $2[3] - '0';
     }
     | part BACKGROUND {
         $$ = $1;