cb9264099
Sven Eisenberg
2016-04-03
Subject
ubirename: new applet
Binary
No binary (build failed)
Architecture & Compiler Flags
—
Build Log
(log yok)
Commit Diff GitHub →
miscutils/ubirename.c+111 -0
| @@ -0,0 +1,111 @@ | |
| + | /* ubirename - port of the ubirename from the mtd-utils package |
| + | * |
| + | * A utility to rename one UBI volume. |
| + | * |
| + | * 2016-03-01 Sven Eisenberg <[email protected]> |
| + | * |
| + | * Licensed under GPLv2, see file LICENSE in this source tree. |
| + | */ |
| + | //config:config UBIRENAME |
| + | //config: bool "ubirename" |
| + | //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)) |
| + | |
| + | //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_VOL_NAME_MAX 127 |
| + | #define UBI_MAX_VOLUMES 128 |
| + | // end ubi-media.h |
| + | |
| + | #define UBI_MAX_VOLUME_NAME UBI_VOL_NAME_MAX |
| + | |
| + | // 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 i, 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_error_msg_and_die("too many renames requested"); |
| + | |
| + | ubi_devname = argv[1]; |
| + | if (sscanf(ubi_devname, "/dev/ubi%u", &ubi_devnum) != 1) |
| + | bb_error_msg_and_die("not a ubi device: '%s'", ubi_devname); |
| + | |
| + | n = 0; |
| + | argv += 2; |
| + | while (argv[0]) { |
| + | for (i = 0; i < UBI_MAX_VOLUMES; i++) { |
| + | char buf[UBI_VOL_NAME_MAX + 1]; |
| + | char fname[sizeof("/sys/class/ubi/ubi%u_%u/name") + 2 * sizeof(int)*3]; |
| + | |
| + | sprintf(fname, "/sys/class/ubi/ubi%u_%u/name", ubi_devnum, i); |
| + | if (open_read_close(fname, buf, sizeof(buf)) <= 0) |
| + | continue; |
| + | |
| + | strchrnul(buf, '\n')[0] = '\0'; |
| + | if (strcmp(buf, argv[0]) == 0) |
| + | goto found; |
| + | } |
| + | bb_error_msg_and_die("no volume '%s' found", argv[0]); |
| + | found: |
| + | rnvol->ents[n].vol_id = i; |
| + | rnvol->ents[n].name_len = strlen(argv[1]); |
| + | 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; |
| + | } |