Merge branch 'cmd' into dev

Conflicts:
	include/ucore/atomic.h
	include/ucore/dstr.h

src/cmd/cmd.c

@@ -0,0 +1,54 @@
+#include <stdint.h>
+
+enum UCCmdRc {
+    /**Executed ok */
+    UC_CMD_OK,  
+    /**Executed with warning */
+    UC_CMD_WARNING,
+    /*Not executed, incomplete command */
+    UC_CMD_INCOMPLETE,
+    /*Not executed, generic error */
+    UC_CMD_ERROR,
+};
+
+typedef enum UCCmdRc (*uc_cmd_handler)(int narg, char *args[]);
+typedef void (*uc_cmd_write_cfg)(void);
+
+#define UC_CMD_FL_HIDDEN (1 << 0)
+
+struct UCCmdNode;
+struct UCCmdDef;
+
+struct UCCmdSettings {
+    const char *name;
+    const char *version;
+    const char *boot_cfg_file;
+
+    struct UCCmdNode *initial_node;
+    struct UCCmdNode *node_head;
+};
+
+struct UCCmdNode {
+    int id;
+    uc_cmd_write_cfg write_func;
+    struct UCCmdDef *cmd_head;        //linked list of UCCmdDef
+    struct UCCmdNode *next;
+};
+
+struct UCCmdDef {
+    const char *cmd;
+    const char **help;
+    size_t  cmd_len;
+    uc_cmd_handler cb;
+    uint32_t flags;
+
+    struct UCCmdDef *next;
+};
+
+
+void uc_cmd_init(const char *app_name, const char *version);
+int uc_cmd_read_config(const char *filename);
+void uc_cmd_set_configfile(const char *filename);
+void uc_cmd_add_cmd(struct UCCmdDef *cmd, int parent_node_id);
+void uc_cmd_set_default_node(int node_id);
+