u-boot/cmd/fs_uuid.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * cmd_fs_uuid.c -- fsuuid command
 *
 * Copyright (C) 2014, Bachmann electronic GmbH
 */

#include <common.h>
#include <command.h>
#include <fs.h>

static int do_fs_uuid_wrapper(cmd_tbl_t *cmdtp, int flag,
	int argc, char * const argv[])
{
	return do_fs_uuid(cmdtp, flag, argc, argv, FS_TYPE_ANY);
}

U_BOOT_CMD(
	fsuuid, 4, 1, do_fs_uuid_wrapper,
	"Look up a filesystem UUID",
	"<interface> <dev>:<part>\n"
	"    - print filesystem UUID\n"
	"fsuuid <interface> <dev>:<part> <varname>\n"
	"    - set environment variable to filesystem UUID\n"
);
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-06 17:58:06 -04:00			`// SPDX-License-Identifier: GPL-2.0+`
fs: make it possible to read the filesystem UUID Some filesystems have a UUID stored in its superblock. To allow using root=UUID=... for the kernel command line we need a way to read-out the filesystem UUID. changes rfc -> v1: - make the environment variable an option parameter. If not given, the UUID is printed out. If given, it is stored in the env variable. - corrected typos - return error codes changes v1 -> v2: - fix return code of do_fs_uuid(..) - document do_fs_uuid(..) - implement fs_uuid_unsuported(..) be more consistent with the way other optional functionality works changes v2 -> v3: - change ext4fs_uuid(..) to make use of #if .. #else .. #endif construct to get rid of unreachable code Hit any key to stop autoboot: 0 => fsuuid fsuuid - Look up a filesystem UUID Usage: fsuuid <interface> <dev>:<part> - print filesystem UUID fsuuid <interface> <dev>:<part> <varname> - set environment variable to filesystem UUID => fsuuid mmc 0:1 d9f9fc05-45ae-4a36-a616-fccce0e4f887 => fsuuid mmc 0:2 eb3db83c-7b28-499f-95ce-9e0bb21cda81 => fsuuid mmc 0:1 uuid1 => fsuuid mmc 0:2 uuid2 => printenv uuid1 uuid1=d9f9fc05-45ae-4a36-a616-fccce0e4f887 => printenv uuid2 uuid2=eb3db83c-7b28-499f-95ce-9e0bb21cda81 => Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com> Acked-by: Stephen Warren <swarren@nvidia.com> 2014-11-12 14:35:04 +01:00			`/*`
			`* cmd_fs_uuid.c -- fsuuid command`
			`*`
			`* Copyright (C) 2014, Bachmann electronic GmbH`
			`*/`

			`#include <common.h>`
			`#include <command.h>`
			`#include <fs.h>`

			`static int do_fs_uuid_wrapper(cmd_tbl_t *cmdtp, int flag,`
			`int argc, char * const argv[])`
			`{`
			`return do_fs_uuid(cmdtp, flag, argc, argv, FS_TYPE_ANY);`
			`}`

			`U_BOOT_CMD(`
			`fsuuid, 4, 1, do_fs_uuid_wrapper,`
			`"Look up a filesystem UUID",`
			`"<interface> <dev>:<part>\n"`
			`" - print filesystem UUID\n"`
			`"fsuuid <interface> <dev>:<part> <varname>\n"`
			`" - set environment variable to filesystem UUID\n"`
			`);`