disk_shellcmd.c 文件参考

浏览源代码.

函数
INT32	osShellCmdPartInfo (INT32 argc, const CHAR **argv)
	SHELLCMD_ENTRY (partinfo_shellcmd, CMD_TYPE_EX, "partinfo", XARGS,(CmdCallBackFunc) osShellCmdPartInfo)

函数说明

osShellCmdPartInfo()

INT32 osShellCmdPartInfo	(	INT32	argc,
		const CHAR **	argv
	)

在文件 disk_shellcmd.c 第 59 行定义.

{
    struct Vnode *node = NULL;
    los_part *part = NULL;
    const CHAR *str = "/dev";
    int ret;
 
    if ((argc != 1) || (strncmp(argv[0], str, strlen(str)) != 0)) {//参数必须是 /dev 开头
        PRINTK("Usage  :\n");
        PRINTK("        partinfo <dev_vnodename>\n");
        PRINTK("        dev_vnodename : the name of dev\n");
        PRINTK("Example:\n");
        PRINTK("        partinfo /dev/sdap0 \n");
 
        set_errno(EINVAL);
        return -LOS_NOK;
    }
    VnodeHold();
    ret = VnodeLookup(argv[0], &node, 0);//通过设备名称找到索引节点
    if (ret < 0) {
        PRINT_ERR("no part found\n");
        VnodeDrop();
        set_errno(ENOENT);
        return -LOS_NOK;
    }
 
    part = los_part_find(node);//通过索引节点找到分区信息
    VnodeDrop();
    show_part(part);
 
    return LOS_OK;
}

函数调用图:

SHELLCMD_ENTRY()

SHELLCMD_ENTRY	(	partinfo_shellcmd	,
		CMD_TYPE_EX	,
		"partinfo"	,
		XARGS	,
		(CmdCallBackFunc)	osShellCmdPartInfo
	)