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>
9 #include <selinux/context.h>
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)
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;
31 static int change_filedir_context(const char *fname, struct stat *stbuf, void *userData, int depth)
33 context_t context = NULL;
34 security_context_t file_context = NULL;
35 security_context_t context_string;
39 if (option_mask32 & OPT_NODEREFERENCE) {
40 status = lgetfilecon(fname, &file_context);
42 status = getfilecon(fname, &file_context);
44 if (status < 0 && errno != ENODATA) {
45 if ((option_mask32 & OPT_QUIET) == 0)
46 bb_error_msg("cannot obtain security context: %s", fname);
50 if (file_context == NULL && specified_context == NULL) {
51 bb_error_msg("cannot apply partial context to unlabeled file %s", fname);
55 if (specified_context == NULL) {
56 context = set_security_context_component(file_context,
57 user, role, type, range);
59 bb_error_msg("cannot compute security context from %s", file_context);
63 context = context_new(specified_context);
65 bb_error_msg("invalid context: %s", specified_context);
70 context_string = context_str(context);
71 if (!context_string) {
72 bb_error_msg("cannot obtain security context in text expression");
76 if (file_context == NULL || strcmp(context_string, file_context) != 0) {
79 if (option_mask32 & OPT_NODEREFERENCE) {
80 fail = lsetfilecon(fname, context_string);
82 fail = setfilecon(fname, context_string);
84 if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) {
86 ? "context of %s changed to %s\n"
87 : "failed to change context of %s to %s\n",
88 fname, context_string);
92 } else if ((option_mask32 & OPT_QUIET) == 0) {
93 bb_error_msg("failed to change context of %s to %s",
94 fname, context_string);
96 } else if (option_mask32 & OPT_VERBOSE) {
97 printf("context of %s retained as %s\n", fname, context_string);
101 context_free(context);
102 freecon(file_context);
107 #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
108 static const char chcon_longopts[] ALIGN1 =
109 "recursive\0" No_argument "R"
110 "changes\0" No_argument "c"
111 "no-dereference\0" No_argument "h"
112 "silent\0" No_argument "f"
113 "quiet\0" No_argument "f"
114 "user\0" Required_argument "u"
115 "role\0" Required_argument "r"
116 "type\0" Required_argument "t"
117 "range\0" Required_argument "l"
118 "verbose\0" No_argument "v"
119 "reference\0" Required_argument "\xff" /* no short option */
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_longopts;
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(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 1<<option_mask32 & OPT_RECURSIVE,
167 change_filedir_context,
168 change_filedir_context,