| /* ubirename - port of the ubirename from the mtd-utils package |
| * |
| * A utility to rename one UBI volume. |
| * |
| * 2016-03-01 Sven Eisenberg <sven.eisenberg@novero.com> |
| * |
| * Licensed under GPLv2, see file LICENSE in this source tree. |
| */ |
| //config:config UBIRENAME |
| //config: bool "ubirename (2.4 kb)" |
| //config: default y |
| //config: select PLATFORM_LINUX |
| //config: help |
| //config: Utility to rename UBI volumes |
| |
| //applet:IF_UBIRENAME(APPLET(ubirename, BB_DIR_USR_SBIN, BB_SUID_DROP)) |
| /* not NOEXEC: if flash operation stalls, use less memory in "hung" process */ |
| |
| //kbuild:lib-$(CONFIG_UBIRENAME) += ubirename.o |
| |
| //usage:#define ubirename_trivial_usage |
| //usage: "UBI_DEVICE OLD_VOLNAME NEW_VOLNAME [OLD2 NEW2]..." |
| //usage:#define ubirename_full_usage "\n\n" |
| //usage: "Rename UBI volumes on UBI_DEVICE" |
| |
| #include "libbb.h" |
| #include <mtd/mtd-user.h> |
| |
| #ifndef __packed |
| # define __packed __attribute__((packed)) |
| #endif |
| |
| // from ubi-media.h |
| #define UBI_MAX_VOLUME_NAME 127 |
| #define UBI_MAX_VOLUMES 128 |
| // end ubi-media.h |
| |
| // from ubi-user.h |
| /* ioctl commands of UBI character devices */ |
| #define UBI_IOC_MAGIC 'o' |
| |
| /* Re-name volumes */ |
| #define UBI_IOCRNVOL _IOW(UBI_IOC_MAGIC, 3, struct ubi_rnvol_req) |
| |
| /* Maximum amount of UBI volumes that can be re-named at one go */ |
| #define UBI_MAX_RNVOL 32 |
| |
| struct ubi_rnvol_req { |
| int32_t count; |
| int8_t padding1[12]; |
| struct { |
| int32_t vol_id; |
| int16_t name_len; |
| int8_t padding2[2]; |
| char name[UBI_MAX_VOLUME_NAME + 1]; |
| } ents[UBI_MAX_RNVOL]; |
| } __packed; |
| // end ubi-user.h |
| |
| int ubirename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int ubirename_main(int argc, char **argv) |
| { |
| struct ubi_rnvol_req *rnvol; |
| const char *ubi_devname; |
| unsigned ubi_devnum; |
| unsigned n; |
| |
| /* argc can be 4, 6, 8, ... */ |
| if ((argc & 1) || (argc >>= 1) < 2) |
| bb_show_usage(); |
| |
| rnvol = xzalloc(sizeof(*rnvol)); |
| rnvol->count = --argc; |
| if (argc > ARRAY_SIZE(rnvol->ents)) |
| bb_simple_error_msg_and_die("too many renames requested"); |
| |
| ubi_devname = argv[1]; |
| ubi_devnum = ubi_devnum_from_devname(ubi_devname); |
| |
| n = 0; |
| argv += 2; |
| while (argv[0]) { |
| rnvol->ents[n].vol_id = ubi_get_volid_by_name(ubi_devnum, argv[0]); |
| |
| /* strnlen avoids overflow of 16-bit field (paranoia) */ |
| rnvol->ents[n].name_len = strnlen(argv[1], sizeof(rnvol->ents[n].name)); |
| if (rnvol->ents[n].name_len >= sizeof(rnvol->ents[n].name)) |
| bb_error_msg_and_die("new name '%s' is too long", argv[1]); |
| |
| strcpy(rnvol->ents[n].name, argv[1]); |
| n++; |
| argv += 2; |
| } |
| |
| xioctl(xopen(ubi_devname, O_RDONLY), UBI_IOCRNVOL, rnvol); |
| |
| return 0; |
| } |