linux 程序调用system执行命令

正确使用system方法，判断返回值

int exeCmd(const char *cmd) {
        pid_t status;

        status = system(cmd);

        if (- == status)
        {
            WriteLog("system error!");
        }
        else
        {
            WriteLog("exit status value = [0x%x]\n", status);

            if (WIFEXITED(status))
            {
                if ( == WEXITSTATUS(status))
                {
                    WriteLog("run CMD script successfully.\n");
                    return ;
                }
                else
                {
                    WriteLog("run CMD=[%s] script fail, script exit code: %d\n", cmd,WEXITSTATUS(status));
                }
            }
            else
            {
                WriteLog("exit status = [%d]\n", WEXITSTATUS(status));
            }
        }

        return -;

}