Contents of /trunk/mkinitrd-magellan/busybox/selinux/chcon.c
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
File MIME type: text/plain
File size: 5188 byte(s)
-updated to busybox-1.13.4
1 | /* |
2 | * chcon -- change security context, based on coreutils-5.97-13 |
3 | * |
4 | * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp> |
5 | * |
6 | * Copyright (C) 2006 - 2007 KaiGai Kohei <kaigai@kaigai.gr.jp> |
7 | */ |
8 | #include <getopt.h> |
9 | #include <selinux/context.h> |
10 | |
11 | #include "libbb.h" |
12 | |
13 | #define OPT_RECURSIVE (1<<0) /* 'R' */ |
14 | #define OPT_CHANHES (1<<1) /* 'c' */ |
15 | #define OPT_NODEREFERENCE (1<<2) /* 'h' */ |
16 | #define OPT_QUIET (1<<3) /* 'f' */ |
17 | #define OPT_USER (1<<4) /* 'u' */ |
18 | #define OPT_ROLE (1<<5) /* 'r' */ |
19 | #define OPT_TYPE (1<<6) /* 't' */ |
20 | #define OPT_RANGE (1<<7) /* 'l' */ |
21 | #define OPT_VERBOSE (1<<8) /* 'v' */ |
22 | #define OPT_REFERENCE ((1<<9) * ENABLE_FEATURE_CHCON_LONG_OPTIONS) |
23 | #define OPT_COMPONENT_SPECIFIED (OPT_USER | OPT_ROLE | OPT_TYPE | OPT_RANGE) |
24 | |
25 | static char *user = NULL; |
26 | static char *role = NULL; |
27 | static char *type = NULL; |
28 | static char *range = NULL; |
29 | static char *specified_context = NULL; |
30 | |
31 | static int FAST_FUNC change_filedir_context( |
32 | const char *fname, |
33 | struct stat *stbuf UNUSED_PARAM, |
34 | void *userData UNUSED_PARAM, |
35 | int depth UNUSED_PARAM) |
36 | { |
37 | context_t context = NULL; |
38 | security_context_t file_context = NULL; |
39 | security_context_t context_string; |
40 | int rc = FALSE; |
41 | int status = 0; |
42 | |
43 | if (option_mask32 & OPT_NODEREFERENCE) { |
44 | status = lgetfilecon(fname, &file_context); |
45 | } else { |
46 | status = getfilecon(fname, &file_context); |
47 | } |
48 | if (status < 0 && errno != ENODATA) { |
49 | if ((option_mask32 & OPT_QUIET) == 0) |
50 | bb_error_msg("cannot obtain security context: %s", fname); |
51 | goto skip; |
52 | } |
53 | |
54 | if (file_context == NULL && specified_context == NULL) { |
55 | bb_error_msg("cannot apply partial context to unlabeled file %s", fname); |
56 | goto skip; |
57 | } |
58 | |
59 | if (specified_context == NULL) { |
60 | context = set_security_context_component(file_context, |
61 | user, role, type, range); |
62 | if (!context) { |
63 | bb_error_msg("cannot compute security context from %s", file_context); |
64 | goto skip; |
65 | } |
66 | } else { |
67 | context = context_new(specified_context); |
68 | if (!context) { |
69 | bb_error_msg("invalid context: %s", specified_context); |
70 | goto skip; |
71 | } |
72 | } |
73 | |
74 | context_string = context_str(context); |
75 | if (!context_string) { |
76 | bb_error_msg("cannot obtain security context in text expression"); |
77 | goto skip; |
78 | } |
79 | |
80 | if (file_context == NULL || strcmp(context_string, file_context) != 0) { |
81 | int fail; |
82 | |
83 | if (option_mask32 & OPT_NODEREFERENCE) { |
84 | fail = lsetfilecon(fname, context_string); |
85 | } else { |
86 | fail = setfilecon(fname, context_string); |
87 | } |
88 | if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) { |
89 | printf(!fail |
90 | ? "context of %s changed to %s\n" |
91 | : "failed to change context of %s to %s\n", |
92 | fname, context_string); |
93 | } |
94 | if (!fail) { |
95 | rc = TRUE; |
96 | } else if ((option_mask32 & OPT_QUIET) == 0) { |
97 | bb_error_msg("failed to change context of %s to %s", |
98 | fname, context_string); |
99 | } |
100 | } else if (option_mask32 & OPT_VERBOSE) { |
101 | printf("context of %s retained as %s\n", fname, context_string); |
102 | rc = TRUE; |
103 | } |
104 | skip: |
105 | context_free(context); |
106 | freecon(file_context); |
107 | |
108 | return rc; |
109 | } |
110 | |
111 | #if ENABLE_FEATURE_CHCON_LONG_OPTIONS |
112 | static const char chcon_longopts[] ALIGN1 = |
113 | "recursive\0" No_argument "R" |
114 | "changes\0" No_argument "c" |
115 | "no-dereference\0" No_argument "h" |
116 | "silent\0" No_argument "f" |
117 | "quiet\0" No_argument "f" |
118 | "user\0" Required_argument "u" |
119 | "role\0" Required_argument "r" |
120 | "type\0" Required_argument "t" |
121 | "range\0" Required_argument "l" |
122 | "verbose\0" No_argument "v" |
123 | "reference\0" Required_argument "\xff" /* no short option */ |
124 | ; |
125 | #endif |
126 | |
127 | int chcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
128 | int chcon_main(int argc UNUSED_PARAM, char **argv) |
129 | { |
130 | char *reference_file; |
131 | char *fname; |
132 | int i, errors = 0; |
133 | |
134 | #if ENABLE_FEATURE_CHCON_LONG_OPTIONS |
135 | applet_long_options = chcon_longopts; |
136 | #endif |
137 | opt_complementary = "-1" /* at least 1 param */ |
138 | ":?" /* error if exclusivity constraints are violated */ |
139 | #if ENABLE_FEATURE_CHCON_LONG_OPTIONS |
140 | ":\xff--urtl:u--\xff:r--\xff:t--\xff:l--\xff" |
141 | #endif |
142 | ":f--v:v--f"; /* 'verbose' and 'quiet' are exclusive */ |
143 | getopt32(argv, "Rchfu:r:t:l:v", |
144 | &user, &role, &type, &range, &reference_file); |
145 | argv += optind; |
146 | |
147 | #if ENABLE_FEATURE_CHCON_LONG_OPTIONS |
148 | if (option_mask32 & OPT_REFERENCE) { |
149 | /* FIXME: lgetfilecon() should be used when '-h' is specified. |
150 | But current implementation follows the original one. */ |
151 | if (getfilecon(reference_file, &specified_context) < 0) |
152 | bb_perror_msg_and_die("getfilecon('%s') failed", reference_file); |
153 | } else |
154 | #endif |
155 | if ((option_mask32 & OPT_COMPONENT_SPECIFIED) == 0) { |
156 | specified_context = *argv++; |
157 | /* specified_context is never NULL - |
158 | * "-1" in opt_complementary prevents this. */ |
159 | if (!argv[0]) |
160 | bb_error_msg_and_die("too few arguments"); |
161 | } |
162 | |
163 | for (i = 0; (fname = argv[i]) != NULL; i++) { |
164 | int fname_len = strlen(fname); |
165 | while (fname_len > 1 && fname[fname_len - 1] == '/') |
166 | fname_len--; |
167 | fname[fname_len] = '\0'; |
168 | |
169 | if (recursive_action(fname, |
170 | 1<<option_mask32 & OPT_RECURSIVE, |
171 | change_filedir_context, |
172 | change_filedir_context, |
173 | NULL, 0) != TRUE) |
174 | errors = 1; |
175 | } |
176 | return errors; |
177 | } |