Contents of /trunk/mkinitrd-magellan/busybox/miscutils/flash_lock_unlock.c
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Revision 984 -
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Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
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File size: 1660 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 1660 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* Ported to busybox from mtd-utils. |
3 | * |
4 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
5 | */ |
6 | #include "libbb.h" |
7 | #include <mtd/mtd-user.h> |
8 | |
9 | int flash_lock_unlock_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
10 | int flash_lock_unlock_main(int argc UNUSED_PARAM, char **argv) |
11 | { |
12 | /* note: fields in these structs are 32-bits. |
13 | * apparently we can't win anything by using off_t |
14 | * or long long's for offset and/or sectors vars. */ |
15 | struct mtd_info_user info; |
16 | struct erase_info_user lock; |
17 | unsigned long offset; |
18 | long sectors; |
19 | int fd; |
20 | |
21 | #define do_lock (ENABLE_FLASH_LOCK && (!ENABLE_FLASH_UNLOCK || (applet_name[6] == 'l'))) |
22 | |
23 | if (!argv[1]) |
24 | bb_show_usage(); |
25 | |
26 | /* parse offset and number of sectors to lock */ |
27 | offset = 0; |
28 | sectors = -1; |
29 | if (do_lock) { |
30 | if (!argv[2] || !argv[3]) |
31 | bb_show_usage(); |
32 | offset = xstrtoul(argv[2], 0); |
33 | sectors = xstrtol(argv[3], 0); |
34 | } |
35 | |
36 | fd = xopen(argv[1], O_RDWR); |
37 | |
38 | xioctl(fd, MEMGETINFO, &info); |
39 | |
40 | lock.start = 0; |
41 | lock.length = info.size; |
42 | if (do_lock) { |
43 | unsigned long size = info.size - info.erasesize; |
44 | if (offset > size) { |
45 | bb_error_msg_and_die("%lx is beyond device size %lx\n", |
46 | offset, size); |
47 | } |
48 | |
49 | if (sectors == -1) { |
50 | sectors = info.size / info.erasesize; |
51 | } else { |
52 | // isn't this useless? |
53 | unsigned long num = info.size / info.erasesize; |
54 | if (sectors > num) { |
55 | bb_error_msg_and_die("%ld are too many " |
56 | "sectors, device only has " |
57 | "%ld\n", sectors, num); |
58 | } |
59 | } |
60 | |
61 | lock.start = offset; |
62 | lock.length = sectors * info.erasesize; |
63 | xioctl(fd, MEMLOCK, &lock); |
64 | } else { |
65 | xioctl(fd, MEMUNLOCK, &lock); |
66 | } |
67 | |
68 | return EXIT_SUCCESS; |
69 | } |