fix: random fixes

src/parser/grammar.c

@@ -166,5 +166,30 @@ bool is_first(struct token token, enum rule rule)
 
 struct ast *parse_input(struct lexer_context *ctx)
 {
-    return parse_list(ctx);
+    struct token *token = PEEK_TOKEN();
+
+    if (token->type == TOKEN_EOF)
+        return ast_create_list(NULL);
+
+    if (token->type == TOKEN_NEWLINE)
+    {
+        POP_TOKEN();
+        return ast_create_list(NULL);
+    }
+
+    struct ast *ast = parse_list(ctx);
+    if (ast == NULL)
+        return NULL;
+
+    token = PEEK_TOKEN();
+    if (token->type == TOKEN_NEWLINE || token->type == TOKEN_EOF)
+    {
+        if (token->type == TOKEN_NEWLINE)
+            POP_TOKEN();
+        return ast;
+    }
+
+    puts("Syntax error: expected newline or EOF after list");
+    ast_free(&ast);
+    return NULL;
 }

src/parser/grammar_advanced.c

@@ -9,11 +9,6 @@
 struct ast *parse_redirection(struct lexer_context *ctx)
 {
     struct token *token = PEEK_TOKEN();
-    if (token->type == TOKEN_IONUMBER)
-    {
-        // TODO
-    }
-    
     int io_number = -1;
     if (token->type == TOKEN_IONUMBER)
     {

src/parser/grammar_basic.c

@@ -48,7 +48,11 @@ struct ast *parse_list(struct lexer_context *ctx)
         {
             current_node = parse_and_or(ctx);
             if (current_node == NULL)
+            {
+                struct ast *tmp = ast_create_list(result_list);
+                ast_free(&tmp);
                 return NULL;
+            }
             result_list = list_append(result_list, current_node);
             token = PEEK_TOKEN();
         }
@@ -60,9 +64,11 @@ struct ast *parse_list(struct lexer_context *ctx)
 struct ast *parse_and_or(struct lexer_context *ctx)
 {
     struct ast *result = parse_pipeline(ctx);
+    if (result == NULL)
+        return NULL;
     struct token *token = PEEK_TOKEN();
 
-    if (token->type == TOKEN_AND || token->type == TOKEN_OR)
+    while (token->type == TOKEN_AND || token->type == TOKEN_OR)
     {
         // Set left part
 
@@ -117,7 +123,8 @@ struct ast *parse_command(struct lexer_context *ctx)
     }
     else
     {
-        return ast_create_void(); // TODO not sure what to do
+        puts("Syntax error: expected command");
+        return NULL;
     }
 }