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 #include <selinux/context.h>
15 #define OPT_RECURSIVE (1<<0) /* 'R' */
16 #define OPT_CHANHES (1<<1) /* 'c' */
17 #define OPT_NODEREFERENCE (1<<2) /* 'h' */
18 #define OPT_QUIET (1<<3) /* 'f' */
19 #define OPT_USER (1<<4) /* 'u' */
20 #define OPT_ROLE (1<<5) /* 'r' */
21 #define OPT_TYPE (1<<6) /* 't' */
22 #define OPT_RANGE (1<<7) /* 'l' */
23 #define OPT_VERBOSE (1<<8) /* 'v' */
24 #define OPT_REFERENCE ((1<<9) * ENABLE_FEATURE_CHCON_LONG_OPTIONS)
25 #define OPT_COMPONENT_SPECIFIED (OPT_USER | OPT_ROLE | OPT_TYPE | OPT_RANGE)
27 static char *user
= NULL
;
28 static char *role
= NULL
;
29 static char *type
= NULL
;
30 static char *range
= NULL
;
31 static char *specified_context
= NULL
;
33 static int FAST_FUNC
change_filedir_context(
35 struct stat
*stbuf UNUSED_PARAM
,
36 void *userData UNUSED_PARAM
,
37 int depth UNUSED_PARAM
)
39 context_t context
= NULL
;
40 security_context_t file_context
= NULL
;
41 security_context_t context_string
;
45 if (option_mask32
& OPT_NODEREFERENCE
) {
46 status
= lgetfilecon(fname
, &file_context
);
48 status
= getfilecon(fname
, &file_context
);
50 if (status
< 0 && errno
!= ENODATA
) {
51 if ((option_mask32
& OPT_QUIET
) == 0)
52 bb_error_msg("can't obtain security context: %s", fname
);
56 if (file_context
== NULL
&& specified_context
== NULL
) {
57 bb_error_msg("can't apply partial context to unlabeled file %s", fname
);
61 if (specified_context
== NULL
) {
62 context
= set_security_context_component(file_context
,
63 user
, role
, type
, range
);
65 bb_error_msg("can't compute security context from %s", file_context
);
69 context
= context_new(specified_context
);
71 bb_error_msg("invalid context: %s", specified_context
);
76 context_string
= context_str(context
);
77 if (!context_string
) {
78 bb_error_msg("can't obtain security context in text expression");
82 if (file_context
== NULL
|| strcmp(context_string
, file_context
) != 0) {
85 if (option_mask32
& OPT_NODEREFERENCE
) {
86 fail
= lsetfilecon(fname
, context_string
);
88 fail
= setfilecon(fname
, context_string
);
90 if ((option_mask32
& OPT_VERBOSE
) || ((option_mask32
& OPT_CHANHES
) && !fail
)) {
92 ? "context of %s changed to %s\n"
93 : "can't change context of %s to %s\n",
94 fname
, context_string
);
98 } else if ((option_mask32
& OPT_QUIET
) == 0) {
99 bb_error_msg("can't change context of %s to %s",
100 fname
, context_string
);
102 } else if (option_mask32
& OPT_VERBOSE
) {
103 printf("context of %s retained as %s\n", fname
, context_string
);
107 context_free(context
);
108 freecon(file_context
);
113 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
114 static const char chcon_longopts
[] ALIGN1
=
115 "recursive\0" No_argument
"R"
116 "changes\0" No_argument
"c"
117 "no-dereference\0" No_argument
"h"
118 "silent\0" No_argument
"f"
119 "quiet\0" No_argument
"f"
120 "user\0" Required_argument
"u"
121 "role\0" Required_argument
"r"
122 "type\0" Required_argument
"t"
123 "range\0" Required_argument
"l"
124 "verbose\0" No_argument
"v"
125 "reference\0" Required_argument
"\xff" /* no short option */
129 int chcon_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
130 int chcon_main(int argc UNUSED_PARAM
, char **argv
)
132 char *reference_file
;
136 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
137 applet_long_options
= chcon_longopts
;
139 opt_complementary
= "-1" /* at least 1 param */
140 ":?" /* error if exclusivity constraints are violated */
141 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
142 ":\xff--urtl:u--\xff:r--\xff:t--\xff:l--\xff"
144 ":f--v:v--f"; /* 'verbose' and 'quiet' are exclusive */
145 getopt32(argv
, "Rchfu:r:t:l:v",
146 &user
, &role
, &type
, &range
, &reference_file
);
149 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
150 if (option_mask32
& OPT_REFERENCE
) {
151 /* FIXME: lgetfilecon() should be used when '-h' is specified.
152 But current implementation follows the original one. */
153 if (getfilecon(reference_file
, &specified_context
) < 0)
154 bb_perror_msg_and_die("getfilecon('%s') failed", reference_file
);
157 if ((option_mask32
& OPT_COMPONENT_SPECIFIED
) == 0) {
158 specified_context
= *argv
++;
159 /* specified_context is never NULL -
160 * "-1" in opt_complementary prevents this. */
162 bb_error_msg_and_die("too few arguments");
165 for (i
= 0; (fname
= argv
[i
]) != NULL
; i
++) {
166 int fname_len
= strlen(fname
);
167 while (fname_len
> 1 && fname
[fname_len
- 1] == '/')
169 fname
[fname_len
] = '\0';
171 if (recursive_action(fname
,
172 1<<option_mask32
& OPT_RECURSIVE
,
173 change_filedir_context
,
174 change_filedir_context
,