From 65f50ebecaf46f23cd99a879dd185abe4f145547 Mon Sep 17 00:00:00 2001
From: paladin-t <hellotony521@qq.com>
Date: Thu, 18 Feb 2016 19:19:46 +0800
Subject: [PATCH] +added a SYS statement to the shell.

---
 HISTORY      |  1 +
 shell/main.c | 21 ++++++++++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/HISTORY b/HISTORY
index 6a44ebc..f49c45a 100755
--- a/HISTORY
+++ b/HISTORY
@@ -1,5 +1,6 @@
 Feb. 18 2016
 Added a generic iterator type
+Added a SYS statement to the shell
 Fixed a wrong list linkage bug with list sorting
 
 Feb. 16 2016
diff --git a/shell/main.c b/shell/main.c
index 5eb4946..d777a4c 100755
--- a/shell/main.c
+++ b/shell/main.c
@@ -1102,7 +1102,7 @@ static int_t _ticks(void) {
 
 	clock_gettime(CLOCK_MONOTONIC, &ts);
 
-	return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
+	return (int_t)(ts.tv_sec * 1000 + ts.tv_nsec / 1000000);
 }
 #else /* _MSC_VER */
 #	undef _HAS_TICKS
@@ -1171,6 +1171,24 @@ static int set_importing_dirs(struct mb_interpreter_t* s, void** l) {
 	return result;
 }
 
+static int sys(struct mb_interpreter_t* s, void** l) {
+	int result = MB_FUNC_OK;
+	char* arg = 0;
+
+	mb_assert(s && l);
+
+	mb_check(mb_attempt_open_bracket(s, l));
+
+	mb_check(mb_pop_string(s, l, &arg));
+
+	mb_check(mb_attempt_close_bracket(s, l));
+
+	if(arg)
+		system(arg);
+
+	return result;
+}
+
 static int trace(struct mb_interpreter_t* s, void** l) {
 	int result = MB_FUNC_OK;
 	char* frames[16];
@@ -1300,6 +1318,7 @@ static void _on_startup(void) {
 #endif /* _HAS_TICKS */
 	mb_reg_fun(bas, now);
 	mb_reg_fun(bas, set_importing_dirs);
+	mb_reg_fun(bas, sys);
 	mb_reg_fun(bas, trace);
 	mb_reg_fun(bas, gc);
 	mb_reg_fun(bas, beep);