[1765] | 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>
|
---|
[2725] | 7 | *
|
---|
| 8 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
[1765] | 9 | */
|
---|
[3232] | 10 |
|
---|
| 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..."
|
---|
| 16 | //usage: )
|
---|
| 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"
|
---|
| 30 | //usage: )
|
---|
| 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"
|
---|
| 37 | //usage: "\n -r ROLE"
|
---|
| 38 | //usage: "\n -t TYPE"
|
---|
| 39 | //usage: "\n -l RNG"
|
---|
| 40 | //usage: "\n -R Recurse"
|
---|
| 41 | //usage: )
|
---|
| 42 |
|
---|
[1765] | 43 | #include <selinux/context.h>
|
---|
| 44 |
|
---|
| 45 | #include "libbb.h"
|
---|
| 46 |
|
---|
| 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)
|
---|
| 58 |
|
---|
| 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;
|
---|
| 64 |
|
---|
[2725] | 65 | static int FAST_FUNC change_filedir_context(
|
---|
| 66 | const char *fname,
|
---|
| 67 | struct stat *stbuf UNUSED_PARAM,
|
---|
| 68 | void *userData UNUSED_PARAM,
|
---|
| 69 | int depth UNUSED_PARAM)
|
---|
[1765] | 70 | {
|
---|
| 71 | context_t context = NULL;
|
---|
| 72 | security_context_t file_context = NULL;
|
---|
| 73 | security_context_t context_string;
|
---|
| 74 | int rc = FALSE;
|
---|
| 75 | int status = 0;
|
---|
| 76 |
|
---|
| 77 | if (option_mask32 & OPT_NODEREFERENCE) {
|
---|
| 78 | status = lgetfilecon(fname, &file_context);
|
---|
| 79 | } else {
|
---|
| 80 | status = getfilecon(fname, &file_context);
|
---|
| 81 | }
|
---|
| 82 | if (status < 0 && errno != ENODATA) {
|
---|
| 83 | if ((option_mask32 & OPT_QUIET) == 0)
|
---|
[2725] | 84 | bb_error_msg("can't obtain security context: %s", fname);
|
---|
[1765] | 85 | goto skip;
|
---|
| 86 | }
|
---|
| 87 |
|
---|
| 88 | if (file_context == NULL && specified_context == NULL) {
|
---|
[2725] | 89 | bb_error_msg("can't apply partial context to unlabeled file %s", fname);
|
---|
[1765] | 90 | goto skip;
|
---|
| 91 | }
|
---|
| 92 |
|
---|
| 93 | if (specified_context == NULL) {
|
---|
| 94 | context = set_security_context_component(file_context,
|
---|
[3232] | 95 | user, role, type, range);
|
---|
[1765] | 96 | if (!context) {
|
---|
[2725] | 97 | bb_error_msg("can't compute security context from %s", file_context);
|
---|
[1765] | 98 | goto skip;
|
---|
| 99 | }
|
---|
| 100 | } else {
|
---|
| 101 | context = context_new(specified_context);
|
---|
| 102 | if (!context) {
|
---|
| 103 | bb_error_msg("invalid context: %s", specified_context);
|
---|
| 104 | goto skip;
|
---|
| 105 | }
|
---|
| 106 | }
|
---|
| 107 |
|
---|
| 108 | context_string = context_str(context);
|
---|
| 109 | if (!context_string) {
|
---|
[2725] | 110 | bb_error_msg("can't obtain security context in text expression");
|
---|
[1765] | 111 | goto skip;
|
---|
| 112 | }
|
---|
| 113 |
|
---|
| 114 | if (file_context == NULL || strcmp(context_string, file_context) != 0) {
|
---|
| 115 | int fail;
|
---|
| 116 |
|
---|
| 117 | if (option_mask32 & OPT_NODEREFERENCE) {
|
---|
| 118 | fail = lsetfilecon(fname, context_string);
|
---|
| 119 | } else {
|
---|
| 120 | fail = setfilecon(fname, context_string);
|
---|
| 121 | }
|
---|
| 122 | if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) {
|
---|
| 123 | printf(!fail
|
---|
[3232] | 124 | ? "context of %s changed to %s\n"
|
---|
| 125 | : "can't change context of %s to %s\n",
|
---|
| 126 | fname, context_string);
|
---|
[1765] | 127 | }
|
---|
| 128 | if (!fail) {
|
---|
| 129 | rc = TRUE;
|
---|
| 130 | } else if ((option_mask32 & OPT_QUIET) == 0) {
|
---|
[2725] | 131 | bb_error_msg("can't change context of %s to %s",
|
---|
[3232] | 132 | fname, context_string);
|
---|
[1765] | 133 | }
|
---|
| 134 | } else if (option_mask32 & OPT_VERBOSE) {
|
---|
| 135 | printf("context of %s retained as %s\n", fname, context_string);
|
---|
| 136 | rc = TRUE;
|
---|
| 137 | }
|
---|
| 138 | skip:
|
---|
| 139 | context_free(context);
|
---|
| 140 | freecon(file_context);
|
---|
| 141 |
|
---|
| 142 | return rc;
|
---|
| 143 | }
|
---|
| 144 |
|
---|
| 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 */
|
---|
| 158 | ;
|
---|
| 159 | #endif
|
---|
| 160 |
|
---|
[2725] | 161 | int chcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 162 | int chcon_main(int argc UNUSED_PARAM, char **argv)
|
---|
[1765] | 163 | {
|
---|
| 164 | char *reference_file;
|
---|
| 165 | char *fname;
|
---|
| 166 | int i, errors = 0;
|
---|
| 167 |
|
---|
| 168 | #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
|
---|
| 169 | applet_long_options = chcon_longopts;
|
---|
| 170 | #endif
|
---|
| 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"
|
---|
| 175 | #endif
|
---|
| 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);
|
---|
| 179 | argv += optind;
|
---|
| 180 |
|
---|
| 181 | #if ENABLE_FEATURE_CHCON_LONG_OPTIONS
|
---|
| 182 | if (option_mask32 & OPT_REFERENCE) {
|
---|
| 183 | /* FIXME: lgetfilecon() should be used when '-h' is specified.
|
---|
[3232] | 184 | * But current implementation follows the original one. */
|
---|
[1765] | 185 | if (getfilecon(reference_file, &specified_context) < 0)
|
---|
| 186 | bb_perror_msg_and_die("getfilecon('%s') failed", reference_file);
|
---|
| 187 | } else
|
---|
| 188 | #endif
|
---|
| 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. */
|
---|
| 193 | if (!argv[0])
|
---|
| 194 | bb_error_msg_and_die("too few arguments");
|
---|
| 195 | }
|
---|
| 196 |
|
---|
| 197 | for (i = 0; (fname = argv[i]) != NULL; i++) {
|
---|
| 198 | int fname_len = strlen(fname);
|
---|
| 199 | while (fname_len > 1 && fname[fname_len - 1] == '/')
|
---|
| 200 | fname_len--;
|
---|
| 201 | fname[fname_len] = '\0';
|
---|
| 202 |
|
---|
| 203 | if (recursive_action(fname,
|
---|
[3232] | 204 | 1<<option_mask32 & OPT_RECURSIVE,
|
---|
| 205 | change_filedir_context,
|
---|
| 206 | change_filedir_context,
|
---|
| 207 | NULL, 0) != TRUE)
|
---|
[1765] | 208 | errors = 1;
|
---|
| 209 | }
|
---|
| 210 | return errors;
|
---|
| 211 | }
|
---|