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>
10 #include <selinux/context.h>
12 #define OPT_RECURSIVE (1<<0) /* 'R' */
13 #define OPT_CHANHES (1<<1) /* 'c' */
14 #define OPT_NODEREFERENCE (1<<2) /* 'h' */
15 #define OPT_QUIET (1<<3) /* 'f' */
16 #define OPT_USER (1<<4) /* 'u' */
17 #define OPT_ROLE (1<<5) /* 'r' */
18 #define OPT_TYPE (1<<6) /* 't' */
19 #define OPT_RANGE (1<<7) /* 'l' */
20 #define OPT_VERBOSE (1<<8) /* 'v' */
21 #define OPT_REFERENCE ((1<<9) * ENABLE_FEATURE_CHCON_LONG_OPTIONS)
22 #define OPT_COMPONENT_SPECIFIED (OPT_USER | OPT_ROLE | OPT_TYPE | OPT_RANGE)
24 static char *user = NULL;
25 static char *role = NULL;
26 static char *type = NULL;
27 static char *range = NULL;
28 static char *specified_context = NULL;
30 static int change_filedir_context(const char *fname, struct stat *stbuf, void *userData, int depth)
32 context_t context = NULL;
33 security_context_t file_context = NULL;
34 security_context_t context_string;
38 if (option_mask32 & OPT_NODEREFERENCE) {
39 status = lgetfilecon(fname, &file_context);
41 status = getfilecon(fname, &file_context);
43 if (status < 0 && errno != ENODATA) {
44 if ((option_mask32 & OPT_QUIET) == 0)
45 bb_error_msg("cannot obtain security context: %s", fname);
49 if (file_context == NULL && specified_context == NULL) {
50 bb_error_msg("cannot apply partial context to unlabeled file %s", fname);
54 if (specified_context == NULL) {
55 context = set_security_context_component(file_context,
56 user, role, type, range);
58 bb_error_msg("cannot compute security context from %s", file_context);
62 context = context_new(specified_context);
64 bb_error_msg("invalid context: %s", specified_context);
69 context_string = context_str(context);
70 if (!context_string) {
71 bb_error_msg("cannot obtain security context in text expression");
75 if (file_context == NULL || strcmp(context_string, file_context) != 0) {
78 if (option_mask32 & OPT_NODEREFERENCE) {
79 fail = lsetfilecon(fname, context_string);
81 fail = setfilecon(fname, context_string);
83 if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) {
85 ? "context of %s changed to %s\n"
86 : "failed to change context of %s to %s\n",
87 fname, context_string);
91 } else if ((option_mask32 & OPT_QUIET) == 0) {
92 bb_error_msg("failed to change context of %s to %s",
93 fname, context_string);
95 } else if (option_mask32 & OPT_VERBOSE) {
96 printf("context of %s retained as %s\n", fname, context_string);
100 context_free(context);
101 freecon(file_context);
106 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
107 static struct option chcon_options[] = {
108 { "recursive", 0, NULL, 'R' },
109 { "changes", 0, NULL, 'c' },
110 { "no-dereference", 0, NULL, 'h' },
111 { "silent", 0, NULL, 'f' },
112 { "quiet", 0, NULL, 'f' },
113 { "user", 1, NULL, 'u' },
114 { "role", 1, NULL, 'r' },
115 { "type", 1, NULL, 't' },
116 { "range", 1, NULL, 'l' },
117 { "verbose", 0, NULL, 'v' },
118 { "reference", 1, NULL, 0xff }, /* no short option */
119 { NULL, 0, NULL, 0 },
123 int chcon_main(int argc, char *argv[]);
124 int chcon_main(int argc, char *argv[])
126 char *reference_file;
130 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
131 applet_long_options = chcon_options;
133 opt_complementary = "-1" /* at least 1 param */
134 ":?" /* error if exclusivity constraints are violated */
135 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
136 ":\xff--urtl:u--\xff:r--\xff:t--\xff:l--\xff"
138 ":f--v:v--f"; /* 'verbose' and 'quiet' are exclusive */
139 getopt32(argc, argv, "Rchf:u:r:t:l:v",
140 &user, &role, &type, &range, &reference_file);
143 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
144 if (option_mask32 & OPT_REFERENCE) {
145 /* FIXME: lgetfilecon() should be used when '-h' is specified.
146 But current implementation follows the original one. */
147 if (getfilecon(reference_file, &specified_context) < 0)
148 bb_perror_msg_and_die("getfilecon('%s') failed", reference_file);
151 if ((option_mask32 & OPT_COMPONENT_SPECIFIED) == 0) {
152 specified_context = *argv++;
153 /* specified_context is never NULL -
154 * "-1" in opt_complementary prevents this. */
156 bb_error_msg_and_die("too few arguments");
159 for (i = 0; (fname = argv[i]) != NULL; i++) {
160 int fname_len = strlen(fname);
161 while (fname_len > 1 && fname[fname_len - 1] == '/')
163 fname[fname_len] = '\0';
165 if (recursive_action(fname,
166 option_mask32 & OPT_RECURSIVE,
167 FALSE, /* followLinks */
168 FALSE, /* depthFirst */
169 change_filedir_context,
170 change_filedir_context,