Contents of /trunk/mkinitrd-magellan/busybox/util-linux/tune2fs.c
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 1590 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * tune2fs: utility to modify EXT2 filesystem |
4 | * |
5 | * Busybox'ed (2009) by Vladimir Dronnikov <dronnikov@gmail.com> |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
8 | */ |
9 | #include "libbb.h" |
10 | #include <linux/fs.h> |
11 | #include <linux/ext2_fs.h> |
12 | #include "volume_id/volume_id_internal.h" |
13 | |
14 | // storage helpers |
15 | char BUG_wrong_field_size(void); |
16 | #define STORE_LE(field, value) \ |
17 | do { \ |
18 | if (sizeof(field) == 4) \ |
19 | field = cpu_to_le32(value); \ |
20 | else if (sizeof(field) == 2) \ |
21 | field = cpu_to_le16(value); \ |
22 | else if (sizeof(field) == 1) \ |
23 | field = (value); \ |
24 | else \ |
25 | BUG_wrong_field_size(); \ |
26 | } while (0) |
27 | |
28 | #define FETCH_LE32(field) \ |
29 | (sizeof(field) == 4 ? cpu_to_le32(field) : BUG_wrong_field_size()) |
30 | |
31 | enum { |
32 | OPT_L = 1 << 0, // label |
33 | }; |
34 | |
35 | int tune2fs_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
36 | int tune2fs_main(int argc UNUSED_PARAM, char **argv) |
37 | { |
38 | unsigned opts; |
39 | const char *label; |
40 | struct ext2_super_block *sb; |
41 | int fd; |
42 | |
43 | opt_complementary = "=1"; |
44 | opts = getopt32(argv, "L:", &label); |
45 | argv += optind; // argv[0] -- device |
46 | |
47 | if (!opts) |
48 | bb_show_usage(); |
49 | |
50 | // read superblock |
51 | fd = xopen(argv[0], O_RDWR); |
52 | xlseek(fd, 1024, SEEK_SET); |
53 | sb = xzalloc(1024); |
54 | xread(fd, sb, 1024); |
55 | |
56 | // mangle superblock |
57 | //STORE_LE(sb->s_wtime, time(NULL)); - why bother? |
58 | // set the label |
59 | if (1 /*opts & OPT_L*/) |
60 | safe_strncpy((char *)sb->s_volume_name, label, sizeof(sb->s_volume_name)); |
61 | // write superblock |
62 | xlseek(fd, 1024, SEEK_SET); |
63 | xwrite(fd, sb, 1024); |
64 | |
65 | if (ENABLE_FEATURE_CLEAN_UP) { |
66 | free(sb); |
67 | } |
68 | |
69 | xclose(fd); |
70 | return EXIT_SUCCESS; |
71 | } |