Contents of /trunk/mkinitrd-magellan/busybox/e2fsprogs/old_e2fsprogs/chattr.c
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 5024 byte(s)
-updated to busybox-1.13.4
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * chattr.c - Change file attributes on an ext2 file system |
4 | * |
5 | * Copyright (C) 1993, 1994 Remy Card <card@masi.ibp.fr> |
6 | * Laboratoire MASI, Institut Blaise Pascal |
7 | * Universite Pierre et Marie Curie (Paris VI) |
8 | * |
9 | * This file can be redistributed under the terms of the GNU General |
10 | * Public License |
11 | */ |
12 | |
13 | /* |
14 | * History: |
15 | * 93/10/30 - Creation |
16 | * 93/11/13 - Replace stat() calls by lstat() to avoid loops |
17 | * 94/02/27 - Integrated in Ted's distribution |
18 | * 98/12/29 - Ignore symlinks when working recursively (G M Sipe) |
19 | * 98/12/29 - Display version info only when -V specified (G M Sipe) |
20 | */ |
21 | |
22 | #include <sys/types.h> |
23 | #include <dirent.h> |
24 | #include <fcntl.h> |
25 | #include <stdio.h> |
26 | #include <stdlib.h> |
27 | #include <unistd.h> |
28 | #include <string.h> |
29 | #include <errno.h> |
30 | #include <sys/param.h> |
31 | #include <sys/stat.h> |
32 | #include "ext2fs/ext2_fs.h" |
33 | |
34 | #ifdef __GNUC__ |
35 | # define EXT2FS_ATTR(x) __attribute__(x) |
36 | #else |
37 | # define EXT2FS_ATTR(x) |
38 | #endif |
39 | |
40 | #include "e2fsbb.h" |
41 | #include "e2p/e2p.h" |
42 | |
43 | #define OPT_ADD 1 |
44 | #define OPT_REM 2 |
45 | #define OPT_SET 4 |
46 | #define OPT_SET_VER 8 |
47 | static int flags; |
48 | static int recursive; |
49 | |
50 | static unsigned long version; |
51 | |
52 | static unsigned long af; |
53 | static unsigned long rf; |
54 | static unsigned long sf; |
55 | |
56 | struct flags_char { |
57 | unsigned long flag; |
58 | char optchar; |
59 | }; |
60 | |
61 | static const struct flags_char flags_array[] = { |
62 | { EXT2_NOATIME_FL, 'A' }, |
63 | { EXT2_SYNC_FL, 'S' }, |
64 | { EXT2_DIRSYNC_FL, 'D' }, |
65 | { EXT2_APPEND_FL, 'a' }, |
66 | { EXT2_COMPR_FL, 'c' }, |
67 | { EXT2_NODUMP_FL, 'd' }, |
68 | { EXT2_IMMUTABLE_FL, 'i' }, |
69 | { EXT3_JOURNAL_DATA_FL, 'j' }, |
70 | { EXT2_SECRM_FL, 's' }, |
71 | { EXT2_UNRM_FL, 'u' }, |
72 | { EXT2_NOTAIL_FL, 't' }, |
73 | { EXT2_TOPDIR_FL, 'T' }, |
74 | { 0, 0 } |
75 | }; |
76 | |
77 | static unsigned long get_flag(char c) |
78 | { |
79 | const struct flags_char *fp; |
80 | for (fp = flags_array; fp->flag; fp++) |
81 | if (fp->optchar == c) |
82 | return fp->flag; |
83 | bb_show_usage(); |
84 | return 0; |
85 | } |
86 | |
87 | static int decode_arg(char *arg) |
88 | { |
89 | unsigned long *fl; |
90 | char opt = *arg++; |
91 | |
92 | if (opt == '-') { |
93 | flags |= OPT_REM; |
94 | fl = &rf; |
95 | } else if (opt == '+') { |
96 | flags |= OPT_ADD; |
97 | fl = ⁡ |
98 | } else if (opt == '=') { |
99 | flags |= OPT_SET; |
100 | fl = &sf; |
101 | } else |
102 | return EOF; |
103 | |
104 | for (; *arg; ++arg) |
105 | (*fl) |= get_flag(*arg); |
106 | |
107 | return 1; |
108 | } |
109 | |
110 | static int chattr_dir_proc(const char *, struct dirent *, void *); |
111 | |
112 | static void change_attributes(const char * name) |
113 | { |
114 | unsigned long fsflags; |
115 | struct stat st; |
116 | |
117 | if (lstat(name, &st) == -1) { |
118 | bb_error_msg("stat %s failed", name); |
119 | return; |
120 | } |
121 | if (S_ISLNK(st.st_mode) && recursive) |
122 | return; |
123 | |
124 | /* Don't try to open device files, fifos etc. We probably |
125 | * ought to display an error if the file was explicitly given |
126 | * on the command line (whether or not recursive was |
127 | * requested). */ |
128 | if (!S_ISREG(st.st_mode) && !S_ISLNK(st.st_mode) && !S_ISDIR(st.st_mode)) |
129 | return; |
130 | |
131 | if (flags & OPT_SET_VER) |
132 | if (fsetversion(name, version) == -1) |
133 | bb_error_msg("setting version on %s", name); |
134 | |
135 | if (flags & OPT_SET) { |
136 | fsflags = sf; |
137 | } else { |
138 | if (fgetflags(name, &fsflags) == -1) { |
139 | bb_error_msg("reading flags on %s", name); |
140 | goto skip_setflags; |
141 | } |
142 | if (flags & OPT_REM) |
143 | fsflags &= ~rf; |
144 | if (flags & OPT_ADD) |
145 | fsflags |= af; |
146 | if (!S_ISDIR(st.st_mode)) |
147 | fsflags &= ~EXT2_DIRSYNC_FL; |
148 | } |
149 | if (fsetflags(name, fsflags) == -1) |
150 | bb_error_msg("setting flags on %s", name); |
151 | |
152 | skip_setflags: |
153 | if (S_ISDIR(st.st_mode) && recursive) |
154 | iterate_on_dir(name, chattr_dir_proc, NULL); |
155 | } |
156 | |
157 | static int chattr_dir_proc(const char *dir_name, struct dirent *de, |
158 | void *private EXT2FS_ATTR((unused))) |
159 | { |
160 | /*if (strcmp(de->d_name, ".") || strcmp(de->d_name, "..")) {*/ |
161 | if (de->d_name[0] == '.' |
162 | && (!de->d_name[1] || (de->d_name[1] == '.' && !de->d_name[2])) |
163 | ) { |
164 | char *path = concat_subpath_file(dir_name, de->d_name); |
165 | if (path) { |
166 | change_attributes(path); |
167 | free(path); |
168 | } |
169 | } |
170 | return 0; |
171 | } |
172 | |
173 | int chattr_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
174 | int chattr_main(int argc, char **argv) |
175 | { |
176 | int i; |
177 | char *arg; |
178 | |
179 | /* parse the args */ |
180 | for (i = 1; i < argc; ++i) { |
181 | arg = argv[i]; |
182 | |
183 | /* take care of -R and -v <version> */ |
184 | if (arg[0] == '-') { |
185 | if (arg[1] == 'R' && arg[2] == '\0') { |
186 | recursive = 1; |
187 | continue; |
188 | } else if (arg[1] == 'v' && arg[2] == '\0') { |
189 | char *tmp; |
190 | ++i; |
191 | if (i >= argc) |
192 | bb_show_usage(); |
193 | version = strtol(argv[i], &tmp, 0); |
194 | if (*tmp) |
195 | bb_error_msg_and_die("bad version '%s'", arg); |
196 | flags |= OPT_SET_VER; |
197 | continue; |
198 | } |
199 | } |
200 | |
201 | if (decode_arg(arg) == EOF) |
202 | break; |
203 | } |
204 | |
205 | /* run sanity checks on all the arguments given us */ |
206 | if (i >= argc) |
207 | bb_show_usage(); |
208 | if ((flags & OPT_SET) && ((flags & OPT_ADD) || (flags & OPT_REM))) |
209 | bb_error_msg_and_die("= is incompatible with - and +"); |
210 | if ((rf & af) != 0) |
211 | bb_error_msg_and_die("Can't set and unset a flag"); |
212 | if (!flags) |
213 | bb_error_msg_and_die("Must use '-v', =, - or +"); |
214 | |
215 | /* now run chattr on all the files passed to us */ |
216 | while (i < argc) |
217 | change_attributes(argv[i++]); |
218 | |
219 | return EXIT_SUCCESS; |
220 | } |