Contents of /trunk/mkinitrd-magellan/busybox/e2fsprogs/e2fs_lib.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
File MIME type: text/plain
File size: 4188 byte(s)
Sun May 30 11:32:42 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 4188 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 | * See README for additional information |
4 | * |
5 | * Licensed under GPLv2, see file LICENSE in this tarball for details. |
6 | */ |
7 | |
8 | #include "libbb.h" |
9 | #include "e2fs_lib.h" |
10 | |
11 | #define HAVE_EXT2_IOCTLS 1 |
12 | |
13 | #if INT_MAX == LONG_MAX |
14 | #define IF_LONG_IS_SAME(...) __VA_ARGS__ |
15 | #define IF_LONG_IS_WIDER(...) |
16 | #else |
17 | #define IF_LONG_IS_SAME(...) |
18 | #define IF_LONG_IS_WIDER(...) __VA_ARGS__ |
19 | #endif |
20 | |
21 | static void close_silently(int fd) |
22 | { |
23 | int e = errno; |
24 | close(fd); |
25 | errno = e; |
26 | } |
27 | |
28 | |
29 | /* Iterate a function on each entry of a directory */ |
30 | int iterate_on_dir(const char *dir_name, |
31 | int FAST_FUNC (*func)(const char *, struct dirent *, void *), |
32 | void *private) |
33 | { |
34 | DIR *dir; |
35 | struct dirent *de; |
36 | |
37 | dir = opendir(dir_name); |
38 | if (dir == NULL) { |
39 | return -1; |
40 | } |
41 | while ((de = readdir(dir)) != NULL) { |
42 | func(dir_name, de, private); |
43 | } |
44 | closedir(dir); |
45 | return 0; |
46 | } |
47 | |
48 | |
49 | /* Get/set a file version on an ext2 file system */ |
50 | int fgetsetversion(const char *name, unsigned long *get_version, unsigned long set_version) |
51 | { |
52 | #if HAVE_EXT2_IOCTLS |
53 | int fd, r; |
54 | IF_LONG_IS_WIDER(int ver;) |
55 | |
56 | fd = open(name, O_RDONLY | O_NONBLOCK); |
57 | if (fd == -1) |
58 | return -1; |
59 | if (!get_version) { |
60 | IF_LONG_IS_WIDER( |
61 | ver = (int) set_version; |
62 | r = ioctl(fd, EXT2_IOC_SETVERSION, &ver); |
63 | ) |
64 | IF_LONG_IS_SAME( |
65 | r = ioctl(fd, EXT2_IOC_SETVERSION, (void*)&set_version); |
66 | ) |
67 | } else { |
68 | IF_LONG_IS_WIDER( |
69 | r = ioctl(fd, EXT2_IOC_GETVERSION, &ver); |
70 | *get_version = ver; |
71 | ) |
72 | IF_LONG_IS_SAME( |
73 | r = ioctl(fd, EXT2_IOC_GETVERSION, (void*)get_version); |
74 | ) |
75 | } |
76 | close_silently(fd); |
77 | return r; |
78 | #else /* ! HAVE_EXT2_IOCTLS */ |
79 | errno = EOPNOTSUPP; |
80 | return -1; |
81 | #endif /* ! HAVE_EXT2_IOCTLS */ |
82 | } |
83 | |
84 | |
85 | /* Get/set a file flags on an ext2 file system */ |
86 | int fgetsetflags(const char *name, unsigned long *get_flags, unsigned long set_flags) |
87 | { |
88 | #if HAVE_EXT2_IOCTLS |
89 | struct stat buf; |
90 | int fd, r; |
91 | IF_LONG_IS_WIDER(int f;) |
92 | |
93 | if (stat(name, &buf) == 0 /* stat is ok */ |
94 | && !S_ISREG(buf.st_mode) && !S_ISDIR(buf.st_mode) |
95 | ) { |
96 | goto notsupp; |
97 | } |
98 | fd = open(name, O_RDONLY | O_NONBLOCK); /* neither read nor write asked for */ |
99 | if (fd == -1) |
100 | return -1; |
101 | |
102 | if (!get_flags) { |
103 | IF_LONG_IS_WIDER( |
104 | f = (int) set_flags; |
105 | r = ioctl(fd, EXT2_IOC_SETFLAGS, &f); |
106 | ) |
107 | IF_LONG_IS_SAME( |
108 | r = ioctl(fd, EXT2_IOC_SETFLAGS, (void*)&set_flags); |
109 | ) |
110 | } else { |
111 | IF_LONG_IS_WIDER( |
112 | r = ioctl(fd, EXT2_IOC_GETFLAGS, &f); |
113 | *get_flags = f; |
114 | ) |
115 | IF_LONG_IS_SAME( |
116 | r = ioctl(fd, EXT2_IOC_GETFLAGS, (void*)get_flags); |
117 | ) |
118 | } |
119 | |
120 | close_silently(fd); |
121 | return r; |
122 | notsupp: |
123 | #endif /* HAVE_EXT2_IOCTLS */ |
124 | errno = EOPNOTSUPP; |
125 | return -1; |
126 | } |
127 | |
128 | |
129 | /* Print file attributes on an ext2 file system */ |
130 | const uint32_t e2attr_flags_value[] = { |
131 | #ifdef ENABLE_COMPRESSION |
132 | EXT2_COMPRBLK_FL, |
133 | EXT2_DIRTY_FL, |
134 | EXT2_NOCOMPR_FL, |
135 | EXT2_ECOMPR_FL, |
136 | #endif |
137 | EXT2_INDEX_FL, |
138 | EXT2_SECRM_FL, |
139 | EXT2_UNRM_FL, |
140 | EXT2_SYNC_FL, |
141 | EXT2_DIRSYNC_FL, |
142 | EXT2_IMMUTABLE_FL, |
143 | EXT2_APPEND_FL, |
144 | EXT2_NODUMP_FL, |
145 | EXT2_NOATIME_FL, |
146 | EXT2_COMPR_FL, |
147 | EXT3_JOURNAL_DATA_FL, |
148 | EXT2_NOTAIL_FL, |
149 | EXT2_TOPDIR_FL |
150 | }; |
151 | |
152 | const char e2attr_flags_sname[] = |
153 | #ifdef ENABLE_COMPRESSION |
154 | "BZXE" |
155 | #endif |
156 | "I" |
157 | "suSDiadAcjtT"; |
158 | |
159 | static const char e2attr_flags_lname[] = |
160 | #ifdef ENABLE_COMPRESSION |
161 | "Compressed_File" "\0" |
162 | "Compressed_Dirty_File" "\0" |
163 | "Compression_Raw_Access" "\0" |
164 | "Compression_Error" "\0" |
165 | #endif |
166 | "Indexed_directory" "\0" |
167 | "Secure_Deletion" "\0" |
168 | "Undelete" "\0" |
169 | "Synchronous_Updates" "\0" |
170 | "Synchronous_Directory_Updates" "\0" |
171 | "Immutable" "\0" |
172 | "Append_Only" "\0" |
173 | "No_Dump" "\0" |
174 | "No_Atime" "\0" |
175 | "Compression_Requested" "\0" |
176 | "Journaled_Data" "\0" |
177 | "No_Tailmerging" "\0" |
178 | "Top_of_Directory_Hierarchies" "\0" |
179 | /* Another trailing NUL is added by compiler */; |
180 | |
181 | void print_e2flags(FILE *f, unsigned long flags, unsigned options) |
182 | { |
183 | const uint32_t *fv; |
184 | const char *fn; |
185 | |
186 | fv = e2attr_flags_value; |
187 | if (options & PFOPT_LONG) { |
188 | int first = 1; |
189 | fn = e2attr_flags_lname; |
190 | do { |
191 | if (flags & *fv) { |
192 | if (!first) |
193 | fputs(", ", f); |
194 | fputs(fn, f); |
195 | first = 0; |
196 | } |
197 | fv++; |
198 | fn += strlen(fn) + 1; |
199 | } while (*fn); |
200 | if (first) |
201 | fputs("---", f); |
202 | } else { |
203 | fn = e2attr_flags_sname; |
204 | do { |
205 | char c = '-'; |
206 | if (flags & *fv) |
207 | c = *fn; |
208 | fputc(c, f); |
209 | fv++; |
210 | fn++; |
211 | } while (*fn); |
212 | } |
213 | } |