/* Ported to busybox from mtd-utils.
 *
 * Licensed under GPLv2, see file LICENSE in this source tree.
 */

//config:config UBIATTACH
//config:	bool "ubiattach"
//config:	default y
//config:	depends on PLATFORM_LINUX
//config:	help
//config:	  Attach MTD device to an UBI device.
//config:
//config:config UBIDETACH
//config:	bool "ubidetach"
//config:	default y
//config:	depends on PLATFORM_LINUX
//config:	help
//config:	  Detach MTD device from an UBI device.
//config:
//config:config UBIMKVOL
//config:	bool "ubimkvol"
//config:	default y
//config:	depends on PLATFORM_LINUX
//config:	help
//config:	  Create a UBI volume.
//config:
//config:config UBIRMVOL
//config:	bool "ubirmvol"
//config:	default y
//config:	depends on PLATFORM_LINUX
//config:	help
//config:	  Delete a UBI volume.
//config:
//config:config UBIRSVOL
//config:	bool "ubirsvol"
//config:	default y
//config:	depends on PLATFORM_LINUX
//config:	help
//config:	  Resize a UBI volume.

//applet:IF_UBIATTACH(APPLET_ODDNAME(ubiattach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubiattach))
//applet:IF_UBIDETACH(APPLET_ODDNAME(ubidetach, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubidetach))
//applet:IF_UBIMKVOL(APPLET_ODDNAME(ubimkvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubimkvol))
//applet:IF_UBIRMVOL(APPLET_ODDNAME(ubirmvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirmvol))
//applet:IF_UBIRSVOL(APPLET_ODDNAME(ubirsvol, ubi_tools, BB_DIR_USR_SBIN, BB_SUID_DROP, ubirsvol))

//kbuild:lib-$(CONFIG_UBIATTACH) += ubi_attach_detach.o
//kbuild:lib-$(CONFIG_UBIDETACH) += ubi_attach_detach.o
//kbuild:lib-$(CONFIG_UBIMKVOL)  += ubi_attach_detach.o
//kbuild:lib-$(CONFIG_UBIRMVOL)  += ubi_attach_detach.o
//kbuild:lib-$(CONFIG_UBIRSVOL)  += ubi_attach_detach.o

#include "libbb.h"
#include <mtd/ubi-user.h>

#define OPTION_M  (1 << 0)
#define OPTION_D  (1 << 1)
#define OPTION_n  (1 << 2)
#define OPTION_N  (1 << 3)
#define OPTION_s  (1 << 4)
#define OPTION_a  (1 << 5)
#define OPTION_t  (1 << 6)

#define do_attach (ENABLE_UBIATTACH && applet_name[3] == 'a')
#define do_detach (ENABLE_UBIDETACH && applet_name[3] == 'd')
#define do_mkvol  (ENABLE_UBIMKVOL  && applet_name[3] == 'm')
#define do_rmvol  (ENABLE_UBIRMVOL  && applet_name[4] == 'm')
#define do_rsvol  (ENABLE_UBIRSVOL  && applet_name[4] == 's')

//usage:#define ubiattach_trivial_usage
//usage:       "-m MTD_NUM [-d UBI_NUM] UBI_CTRL_DEV"
//usage:#define ubiattach_full_usage "\n\n"
//usage:       "Attach MTD device to UBI\n"
//usage:     "\nOptions:"
//usage:     "\n	-m MTD_NUM	MTD device number to attach"
//usage:     "\n	-d UBI_NUM	UBI device number to assign"
//usage:
//usage:#define ubidetach_trivial_usage
//usage:       "-d UBI_NUM UBI_CTRL_DEV"
//usage:#define ubidetach_full_usage "\n\n"
//usage:       "Detach MTD device from UBI\n"
//usage:     "\nOptions:"
//usage:     "\n	-d UBI_NUM	UBI device number"
//usage:
//usage:#define ubimkvol_trivial_usage
//usage:       "UBI_DEVICE -N NAME -s SIZE"
//usage:#define ubimkvol_full_usage "\n\n"
//usage:       "Create UBI Volume\n"
//usage:     "\nOptions:"
//usage:     "\n	-a ALIGNMENT	Volume alignment (default 1)"
//usage:     "\n	-n VOLID	Volume ID, if not specified, it"
//usage:     "\n			will be assigned automatically"
//usage:     "\n	-N NAME		Volume name"
//usage:     "\n	-s SIZE		Size in bytes"
//usage:     "\n	-t TYPE		Volume type (static|dynamic)"
//usage:
//usage:#define ubirmvol_trivial_usage
//usage:       "UBI_DEVICE -n VOLID"
//usage:#define ubirmvol_full_usage "\n\n"
//usage:       "Remove UBI Volume\n"
//usage:     "\nOptions:"
//usage:     "\n	-n VOLID	Volume ID"
//usage:
//usage:#define ubirsvol_trivial_usage
//usage:       "UBI_DEVICE -N NAME -s SIZE"
//usage:#define ubirsvol_full_usage "\n\n"
//usage:       "Resize UBI Volume\n"
//usage:     "\nOptions:"
//usage:     "\n	-N NAME		Volume name"
//usage:     "\n	-s SIZE		Size in bytes"

int ubi_tools_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int ubi_tools_main(int argc UNUSED_PARAM, char **argv)
{
	unsigned opts;
	char *ubi_ctrl;
	//struct stat st;
	int fd;
	int mtd_num;
	int dev_num = UBI_DEV_NUM_AUTO;
	int vol_id = UBI_VOL_NUM_AUTO;
	char *vol_name = NULL;
	int size_bytes;
	int alignment = 1;
	char *type = NULL;

	opt_complementary = "=1:m+:d+:n+:s+:a+";
	opts = getopt32(argv, "m:d:n:N:s:a:t:",
			&mtd_num, &dev_num, &vol_id,
			&vol_name, &size_bytes, &alignment, &type
	);
	ubi_ctrl = argv[optind];

	fd = xopen(ubi_ctrl, O_RDWR);
	//xfstat(fd, &st, ubi_ctrl);
	//if (!S_ISCHR(st.st_mode))
	//	bb_error_msg_and_die("%s: not a char device", ubi_ctrl);

	if (do_attach) {
		struct ubi_attach_req req;
		if (!(opts & OPTION_M))
			bb_error_msg_and_die("%s device not specified", "MTD");

		memset(&req, 0, sizeof(req));
		req.mtd_num = mtd_num;
		req.ubi_num = dev_num;

		xioctl(fd, UBI_IOCATT, &req);
	} else
	if (do_detach) {
		if (!(opts & OPTION_D))
			bb_error_msg_and_die("%s device not specified", "UBI");

		xioctl(fd, UBI_IOCDET, &dev_num);
	} else
	if (do_mkvol) {
		struct ubi_mkvol_req req;
		int vol_name_len;
		if (!(opts & OPTION_s))
			bb_error_msg_and_die("%s size not specified", "UBI");
		if (!(opts & OPTION_N))
			bb_error_msg_and_die("%s name not specified", "UBI");
		vol_name_len = strlen(vol_name);
		if (vol_name_len > UBI_MAX_VOLUME_NAME)
			bb_error_msg_and_die("%s volume name too long", "UBI");

		memset(&req, 0, sizeof(req));
		req.vol_id = vol_id;
		if (opts & OPTION_t) {
			if (type[0] == 's')
				req.vol_type = UBI_STATIC_VOLUME;
			else
				req.vol_type = UBI_DYNAMIC_VOLUME;
		} else {
			req.vol_type = UBI_DYNAMIC_VOLUME;
		}
		req.alignment = alignment;
		req.bytes = size_bytes;
		strncpy(req.name, vol_name, UBI_MAX_VOLUME_NAME);
		req.name_len = vol_name_len;

		xioctl(fd, UBI_IOCMKVOL, &req);
	} else
	if (do_rmvol) {
		if (!(opts & OPTION_n))
			bb_error_msg_and_die("%s volume id not specified", "UBI");

		xioctl(fd, UBI_IOCRMVOL, &vol_id);
	} else
	if (do_rsvol) {
		struct ubi_rsvol_req req;
		if (!(opts & OPTION_s))
			bb_error_msg_and_die("%s size not specified", "UBI");
		if (!(opts & OPTION_n))
			bb_error_msg_and_die("%s volume id not specified", "UBI");

		memset(&req, 0, sizeof(req));
		req.bytes = size_bytes;
		req.vol_id = vol_id;

		xioctl(fd, UBI_IOCRSVOL, &req);
	}

	if (ENABLE_FEATURE_CLEAN_UP)
		close(fd);

	return EXIT_SUCCESS;
}