2 * chcon -- change security context, based on coreutils-5.97-13
4 * Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
6 * Copyright (C) 2006 - 2007 KaiGai Kohei <kaigai@kaigai.gr.jp>
8 * Licensed under GPLv2, see file LICENSE in this source tree.
11 //usage:#define chcon_trivial_usage
12 //usage: "[OPTIONS] CONTEXT FILE..."
13 //usage: "\n chcon [OPTIONS] [-u USER] [-r ROLE] [-l RANGE] [-t TYPE] FILE..."
14 //usage: IF_FEATURE_CHCON_LONG_OPTIONS(
15 //usage: "\n chcon [OPTIONS] --reference=RFILE FILE..."
17 //usage:#define chcon_full_usage "\n\n"
18 //usage: "Change the security context of each FILE to CONTEXT\n"
19 //usage: IF_FEATURE_CHCON_LONG_OPTIONS(
20 //usage: "\n -v,--verbose Verbose"
21 //usage: "\n -c,--changes Report changes made"
22 //usage: "\n -h,--no-dereference Affect symlinks instead of their targets"
23 //usage: "\n -f,--silent,--quiet Suppress most error messages"
24 //usage: "\n --reference=RFILE Use RFILE's group instead of using a CONTEXT value"
25 //usage: "\n -u,--user=USER Set user/role/type/range in the target"
26 //usage: "\n -r,--role=ROLE security context"
27 //usage: "\n -t,--type=TYPE"
28 //usage: "\n -l,--range=RANGE"
29 //usage: "\n -R,--recursive Recurse"
31 //usage: IF_NOT_FEATURE_CHCON_LONG_OPTIONS(
32 //usage: "\n -v Verbose"
33 //usage: "\n -c Report changes made"
34 //usage: "\n -h Affect symlinks instead of their targets"
35 //usage: "\n -f Suppress most error messages"
36 //usage: "\n -u USER Set user/role/type/range in the target security context"
40 //usage: "\n -R Recurse"
43 #include <selinux/context.h>
47 #define OPT_RECURSIVE (1<<0) /* 'R' */
48 #define OPT_CHANHES (1<<1) /* 'c' */
49 #define OPT_NODEREFERENCE (1<<2) /* 'h' */
50 #define OPT_QUIET (1<<3) /* 'f' */
51 #define OPT_USER (1<<4) /* 'u' */
52 #define OPT_ROLE (1<<5) /* 'r' */
53 #define OPT_TYPE (1<<6) /* 't' */
54 #define OPT_RANGE (1<<7) /* 'l' */
55 #define OPT_VERBOSE (1<<8) /* 'v' */
56 #define OPT_REFERENCE ((1<<9) * ENABLE_FEATURE_CHCON_LONG_OPTIONS)
57 #define OPT_COMPONENT_SPECIFIED (OPT_USER | OPT_ROLE | OPT_TYPE | OPT_RANGE)
59 static char *user
= NULL
;
60 static char *role
= NULL
;
61 static char *type
= NULL
;
62 static char *range
= NULL
;
63 static char *specified_context
= NULL
;
65 static int FAST_FUNC
change_filedir_context(
67 struct stat
*stbuf UNUSED_PARAM
,
68 void *userData UNUSED_PARAM
,
69 int depth UNUSED_PARAM
)
71 context_t context
= NULL
;
72 security_context_t file_context
= NULL
;
73 security_context_t context_string
;
77 if (option_mask32
& OPT_NODEREFERENCE
) {
78 status
= lgetfilecon(fname
, &file_context
);
80 status
= getfilecon(fname
, &file_context
);
82 if (status
< 0 && errno
!= ENODATA
) {
83 if ((option_mask32
& OPT_QUIET
) == 0)
84 bb_error_msg("can't obtain security context: %s", fname
);
88 if (file_context
== NULL
&& specified_context
== NULL
) {
89 bb_error_msg("can't apply partial context to unlabeled file %s", fname
);
93 if (specified_context
== NULL
) {
94 context
= set_security_context_component(file_context
,
95 user
, role
, type
, range
);
97 bb_error_msg("can't compute security context from %s", file_context
);
101 context
= context_new(specified_context
);
103 bb_error_msg("invalid context: %s", specified_context
);
108 context_string
= context_str(context
);
109 if (!context_string
) {
110 bb_error_msg("can't obtain security context in text expression");
114 if (file_context
== NULL
|| strcmp(context_string
, file_context
) != 0) {
117 if (option_mask32
& OPT_NODEREFERENCE
) {
118 fail
= lsetfilecon(fname
, context_string
);
120 fail
= setfilecon(fname
, context_string
);
122 if ((option_mask32
& OPT_VERBOSE
) || ((option_mask32
& OPT_CHANHES
) && !fail
)) {
124 ? "context of %s changed to %s\n"
125 : "can't change context of %s to %s\n",
126 fname
, context_string
);
130 } else if ((option_mask32
& OPT_QUIET
) == 0) {
131 bb_error_msg("can't change context of %s to %s",
132 fname
, context_string
);
134 } else if (option_mask32
& OPT_VERBOSE
) {
135 printf("context of %s retained as %s\n", fname
, context_string
);
139 context_free(context
);
140 freecon(file_context
);
145 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
146 static const char chcon_longopts
[] ALIGN1
=
147 "recursive\0" No_argument
"R"
148 "changes\0" No_argument
"c"
149 "no-dereference\0" No_argument
"h"
150 "silent\0" No_argument
"f"
151 "quiet\0" No_argument
"f"
152 "user\0" Required_argument
"u"
153 "role\0" Required_argument
"r"
154 "type\0" Required_argument
"t"
155 "range\0" Required_argument
"l"
156 "verbose\0" No_argument
"v"
157 "reference\0" Required_argument
"\xff" /* no short option */
161 int chcon_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
162 int chcon_main(int argc UNUSED_PARAM
, char **argv
)
164 char *reference_file
;
168 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
169 applet_long_options
= chcon_longopts
;
171 opt_complementary
= "-1" /* at least 1 param */
172 ":?" /* error if exclusivity constraints are violated */
173 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
174 ":\xff--urtl:u--\xff:r--\xff:t--\xff:l--\xff"
176 ":f--v:v--f"; /* 'verbose' and 'quiet' are exclusive */
177 getopt32(argv
, "Rchfu:r:t:l:v",
178 &user
, &role
, &type
, &range
, &reference_file
);
181 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
182 if (option_mask32
& OPT_REFERENCE
) {
183 /* FIXME: lgetfilecon() should be used when '-h' is specified.
184 * But current implementation follows the original one. */
185 if (getfilecon(reference_file
, &specified_context
) < 0)
186 bb_perror_msg_and_die("getfilecon('%s') failed", reference_file
);
189 if ((option_mask32
& OPT_COMPONENT_SPECIFIED
) == 0) {
190 specified_context
= *argv
++;
191 /* specified_context is never NULL -
192 * "-1" in opt_complementary prevents this. */
194 bb_error_msg_and_die("too few arguments");
197 for (i
= 0; (fname
= argv
[i
]) != NULL
; i
++) {
198 int fname_len
= strlen(fname
);
199 while (fname_len
> 1 && fname
[fname_len
- 1] == '/')
201 fname
[fname_len
] = '\0';
203 if (recursive_action(fname
,
204 1<<option_mask32
& OPT_RECURSIVE
,
205 change_filedir_context
,
206 change_filedir_context
,