[3621] | 1 | /* ubirename - port of the ubirename from the mtd-utils package
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| 2 | *
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| 3 | * A utility to rename one UBI volume.
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| 4 | *
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| 5 | * 2016-03-01 Sven Eisenberg <sven.eisenberg@novero.com>
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| 6 | *
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| 7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 8 | */
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| 9 | //config:config UBIRENAME
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| 10 | //config: bool "ubirename"
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| 11 | //config: default y
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| 12 | //config: select PLATFORM_LINUX
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| 13 | //config: help
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| 14 | //config: Utility to rename UBI volumes
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| 15 |
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| 16 | //applet:IF_UBIRENAME(APPLET(ubirename, BB_DIR_USR_SBIN, BB_SUID_DROP))
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| 17 |
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| 18 | //kbuild:lib-$(CONFIG_UBIRENAME) += ubirename.o
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| 19 |
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| 20 | //usage:#define ubirename_trivial_usage
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| 21 | //usage: "UBI_DEVICE OLD_VOLNAME NEW_VOLNAME [OLD2 NEW2]..."
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| 22 | //usage:#define ubirename_full_usage "\n\n"
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| 23 | //usage: "Rename UBI volumes on UBI_DEVICE"
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| 24 |
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| 25 | #include "libbb.h"
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| 26 | #include <mtd/mtd-user.h>
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| 27 |
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| 28 | #ifndef __packed
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| 29 | # define __packed __attribute__((packed))
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| 30 | #endif
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| 31 |
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| 32 | // from ubi-media.h
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| 33 | #define UBI_MAX_VOLUME_NAME 127
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| 34 | #define UBI_MAX_VOLUMES 128
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| 35 | // end ubi-media.h
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| 36 |
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| 37 | // from ubi-user.h
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| 38 | /* ioctl commands of UBI character devices */
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| 39 | #define UBI_IOC_MAGIC 'o'
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| 40 |
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| 41 | /* Re-name volumes */
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| 42 | #define UBI_IOCRNVOL _IOW(UBI_IOC_MAGIC, 3, struct ubi_rnvol_req)
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| 43 |
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| 44 | /* Maximum amount of UBI volumes that can be re-named at one go */
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| 45 | #define UBI_MAX_RNVOL 32
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| 46 |
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| 47 | struct ubi_rnvol_req {
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| 48 | int32_t count;
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| 49 | int8_t padding1[12];
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| 50 | struct {
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| 51 | int32_t vol_id;
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| 52 | int16_t name_len;
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| 53 | int8_t padding2[2];
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| 54 | char name[UBI_MAX_VOLUME_NAME + 1];
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| 55 | } ents[UBI_MAX_RNVOL];
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| 56 | } __packed;
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| 57 | // end ubi-user.h
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| 58 |
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| 59 | int ubirename_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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| 60 | int ubirename_main(int argc, char **argv)
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| 61 | {
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| 62 | struct ubi_rnvol_req *rnvol;
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| 63 | const char *ubi_devname;
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| 64 | unsigned ubi_devnum;
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| 65 | unsigned n;
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| 66 |
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| 67 | /* argc can be 4, 6, 8, ... */
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| 68 | if ((argc & 1) || (argc >>= 1) < 2)
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| 69 | bb_show_usage();
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| 70 |
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| 71 | rnvol = xzalloc(sizeof(*rnvol));
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| 72 | rnvol->count = --argc;
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| 73 | if (argc > ARRAY_SIZE(rnvol->ents))
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| 74 | bb_error_msg_and_die("too many renames requested");
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| 75 |
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| 76 | ubi_devname = argv[1];
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| 77 | ubi_devnum = ubi_devnum_from_devname(ubi_devname);
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| 78 |
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| 79 | n = 0;
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| 80 | argv += 2;
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| 81 | while (argv[0]) {
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| 82 | rnvol->ents[n].vol_id = ubi_get_volid_by_name(ubi_devnum, argv[0]);
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| 83 | rnvol->ents[n].name_len = strlen(argv[1]);
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| 84 | if (rnvol->ents[n].name_len >= sizeof(rnvol->ents[n].name))
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| 85 | bb_error_msg_and_die("new name '%s' is too long", argv[1]);
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| 86 | strcpy(rnvol->ents[n].name, argv[1]);
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| 87 | n++;
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| 88 | argv += 2;
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| 89 | }
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| 90 |
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| 91 | xioctl(xopen(ubi_devname, O_RDONLY), UBI_IOCRNVOL, rnvol);
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| 92 |
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| 93 | return 0;
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| 94 | }
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