Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | setfiles: based on policycoreutils 2.0.19 |
| 3 | policycoreutils was released under GPL 2. |
Denis Vlasenko | 9fe9c1a | 2007-07-23 14:05:02 +0000 | [diff] [blame] | 4 | Port to BusyBox (c) 2007 by Yuichi Nakamura <ynakam@hitachisoft.jp> |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include "libbb.h" |
| 8 | #if ENABLE_FEATURE_SETFILES_CHECK_OPTION |
| 9 | #include <sepol/sepol.h> |
| 10 | #endif |
| 11 | |
| 12 | #define MAX_EXCLUDES 50 |
| 13 | |
| 14 | struct edir { |
| 15 | char *directory; |
| 16 | size_t size; |
| 17 | }; |
| 18 | |
| 19 | struct globals { |
| 20 | FILE *outfile; |
| 21 | char *policyfile; |
| 22 | char *rootpath; |
| 23 | int rootpathlen; |
| 24 | unsigned count; |
| 25 | int excludeCtr; |
| 26 | int errors; |
| 27 | int verbose; /* getopt32 uses it, has to be int */ |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 28 | smallint recurse; /* Recursive descent */ |
| 29 | smallint follow_mounts; |
| 30 | /* Behavior flags determined based on setfiles vs. restorecon */ |
| 31 | smallint expand_realpath; /* Expand paths via realpath */ |
| 32 | smallint abort_on_error; /* Abort the file tree walk upon an error */ |
| 33 | int add_assoc; /* Track inode associations for conflict detection */ |
| 34 | int matchpathcon_flags; /* Flags to matchpathcon */ |
| 35 | dev_t dev_id; /* Device id where target file exists */ |
| 36 | int nerr; |
| 37 | struct edir excludeArray[MAX_EXCLUDES]; |
| 38 | }; |
| 39 | |
| 40 | #define G (*(struct globals*)&bb_common_bufsiz1) |
| 41 | void BUG_setfiles_globals_too_big(void); |
| 42 | #define INIT_G() do { \ |
| 43 | if (sizeof(G) > COMMON_BUFSIZE) \ |
| 44 | BUG_setfiles_globals_too_big(); \ |
| 45 | /* memset(&G, 0, sizeof(G)); - already is */ \ |
| 46 | } while (0) |
| 47 | #define outfile (G.outfile ) |
| 48 | #define policyfile (G.policyfile ) |
| 49 | #define rootpath (G.rootpath ) |
| 50 | #define rootpathlen (G.rootpathlen ) |
| 51 | #define count (G.count ) |
| 52 | #define excludeCtr (G.excludeCtr ) |
| 53 | #define errors (G.errors ) |
| 54 | #define verbose (G.verbose ) |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 55 | #define recurse (G.recurse ) |
| 56 | #define follow_mounts (G.follow_mounts ) |
| 57 | #define expand_realpath (G.expand_realpath ) |
| 58 | #define abort_on_error (G.abort_on_error ) |
| 59 | #define add_assoc (G.add_assoc ) |
| 60 | #define matchpathcon_flags (G.matchpathcon_flags) |
| 61 | #define dev_id (G.dev_id ) |
| 62 | #define nerr (G.nerr ) |
| 63 | #define excludeArray (G.excludeArray ) |
| 64 | |
| 65 | /* Must match getopt32 string! */ |
| 66 | enum { |
| 67 | OPT_d = (1 << 0), |
| 68 | OPT_e = (1 << 1), |
| 69 | OPT_f = (1 << 2), |
| 70 | OPT_i = (1 << 3), |
| 71 | OPT_l = (1 << 4), |
| 72 | OPT_n = (1 << 5), |
| 73 | OPT_p = (1 << 6), |
| 74 | OPT_q = (1 << 7), |
| 75 | OPT_r = (1 << 8), |
| 76 | OPT_s = (1 << 9), |
| 77 | OPT_v = (1 << 10), |
| 78 | OPT_o = (1 << 11), |
| 79 | OPT_F = (1 << 12), |
| 80 | OPT_W = (1 << 13), |
| 81 | OPT_c = (1 << 14), /* c only for setfiles */ |
| 82 | OPT_R = (1 << 14), /* R only for restorecon */ |
| 83 | }; |
| 84 | #define FLAG_d_debug (option_mask32 & OPT_d) |
| 85 | #define FLAG_e (option_mask32 & OPT_e) |
| 86 | #define FLAG_f (option_mask32 & OPT_f) |
| 87 | #define FLAG_i_ignore_enoent (option_mask32 & OPT_i) |
| 88 | #define FLAG_l_take_log (option_mask32 & OPT_l) |
| 89 | #define FLAG_n_dry_run (option_mask32 & OPT_n) |
| 90 | #define FLAG_p_progress (option_mask32 & OPT_p) |
| 91 | #define FLAG_q_quiet (option_mask32 & OPT_q) |
| 92 | #define FLAG_r (option_mask32 & OPT_r) |
| 93 | #define FLAG_s (option_mask32 & OPT_s) |
| 94 | #define FLAG_v (option_mask32 & OPT_v) |
| 95 | #define FLAG_o (option_mask32 & OPT_o) |
| 96 | #define FLAG_F_force (option_mask32 & OPT_F) |
| 97 | #define FLAG_W_warn_no_match (option_mask32 & OPT_W) |
| 98 | #define FLAG_c (option_mask32 & OPT_c) |
| 99 | #define FLAG_R (option_mask32 & OPT_R) |
| 100 | |
| 101 | |
| 102 | static void qprintf(const char *fmt, ...) |
| 103 | { |
| 104 | /* quiet, do nothing */ |
| 105 | } |
| 106 | |
| 107 | static void inc_err(void) |
| 108 | { |
| 109 | nerr++; |
| 110 | if (nerr > 9 && !FLAG_d_debug) { |
| 111 | bb_error_msg_and_die("exiting after 10 errors"); |
| 112 | } |
| 113 | } |
| 114 | |
Denis Vlasenko | 972fa09 | 2007-07-25 17:39:46 +0000 | [diff] [blame] | 115 | static void add_exclude(const char *const directory) |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 116 | { |
| 117 | struct stat sb; |
Denis Vlasenko | 1da7772 | 2007-07-24 06:17:43 +0000 | [diff] [blame] | 118 | size_t len; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 119 | |
| 120 | if (directory == NULL || directory[0] != '/') { |
Denis Vlasenko | 972fa09 | 2007-07-25 17:39:46 +0000 | [diff] [blame] | 121 | bb_error_msg_and_die("full path required for exclude: %s", directory); |
| 122 | |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 123 | } |
| 124 | if (lstat(directory, &sb)) { |
| 125 | bb_error_msg("directory \"%s\" not found, ignoring", directory); |
Denis Vlasenko | 972fa09 | 2007-07-25 17:39:46 +0000 | [diff] [blame] | 126 | return; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 127 | } |
| 128 | if ((sb.st_mode & S_IFDIR) == 0) { |
| 129 | bb_error_msg("\"%s\" is not a directory: mode %o, ignoring", |
| 130 | directory, sb.st_mode); |
Denis Vlasenko | 972fa09 | 2007-07-25 17:39:46 +0000 | [diff] [blame] | 131 | return; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 132 | } |
| 133 | if (excludeCtr == MAX_EXCLUDES) { |
Denis Vlasenko | 972fa09 | 2007-07-25 17:39:46 +0000 | [diff] [blame] | 134 | bb_error_msg_and_die("maximum excludes %d exceeded", MAX_EXCLUDES); |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | len = strlen(directory); |
| 138 | while (len > 1 && directory[len - 1] == '/') { |
| 139 | len--; |
| 140 | } |
| 141 | excludeArray[excludeCtr].directory = xstrndup(directory, len); |
| 142 | excludeArray[excludeCtr++].size = len; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 143 | } |
| 144 | |
Denis Vlasenko | 1da7772 | 2007-07-24 06:17:43 +0000 | [diff] [blame] | 145 | static bool exclude(const char *file) |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 146 | { |
| 147 | int i = 0; |
| 148 | for (i = 0; i < excludeCtr; i++) { |
| 149 | if (strncmp(file, excludeArray[i].directory, |
| 150 | excludeArray[i].size) == 0) { |
| 151 | if (file[excludeArray[i].size] == '\0' |
| 152 | || file[excludeArray[i].size] == '/') { |
| 153 | return 1; |
| 154 | } |
| 155 | } |
| 156 | } |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static int match(const char *name, struct stat *sb, char **con) |
| 161 | { |
| 162 | int ret; |
| 163 | char path[PATH_MAX + 1]; |
| 164 | char *tmp_path = xstrdup(name); |
| 165 | |
Denis Vlasenko | 9fe9c1a | 2007-07-23 14:05:02 +0000 | [diff] [blame] | 166 | if (excludeCtr > 0 && exclude(name)) { |
| 167 | goto err; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 168 | } |
| 169 | ret = lstat(name, sb); |
| 170 | if (ret) { |
| 171 | if (FLAG_i_ignore_enoent && errno == ENOENT) { |
| 172 | free(tmp_path); |
| 173 | return 0; |
| 174 | } |
| 175 | bb_error_msg("stat(%s)", name); |
| 176 | goto err; |
| 177 | } |
| 178 | |
| 179 | if (expand_realpath) { |
| 180 | if (S_ISLNK(sb->st_mode)) { |
| 181 | char *p = NULL; |
| 182 | char *file_sep; |
| 183 | |
| 184 | size_t len = 0; |
| 185 | |
| 186 | if (verbose > 1) |
| 187 | bb_error_msg("warning! %s refers to a symbolic link, not following last component", name); |
| 188 | |
| 189 | file_sep = strrchr(tmp_path, '/'); |
| 190 | if (file_sep == tmp_path) { |
| 191 | file_sep++; |
Denis Vlasenko | a0ad43b | 2007-09-28 11:37:38 +0000 | [diff] [blame^] | 192 | path[0] = '\0'; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 193 | p = path; |
| 194 | } else if (file_sep) { |
| 195 | *file_sep++ = '\0'; |
| 196 | p = realpath(tmp_path, path); |
| 197 | } else { |
| 198 | file_sep = tmp_path; |
| 199 | p = realpath("./", path); |
| 200 | } |
| 201 | if (p) |
| 202 | len = strlen(p); |
| 203 | if (!p || len + strlen(file_sep) + 2 > PATH_MAX) { |
| 204 | bb_perror_msg("realpath(%s) failed", name); |
| 205 | goto err; |
| 206 | } |
| 207 | p += len; |
| 208 | /* ensure trailing slash of directory name */ |
| 209 | if (len == 0 || p[-1] != '/') { |
| 210 | *p++ = '/'; |
| 211 | } |
| 212 | strcpy(p, file_sep); |
| 213 | name = path; |
| 214 | if (excludeCtr > 0 && exclude(name)) |
| 215 | goto err; |
| 216 | |
| 217 | } else { |
| 218 | char *p; |
| 219 | p = realpath(name, path); |
| 220 | if (!p) { |
| 221 | bb_perror_msg("realpath(%s)", name); |
| 222 | goto err; |
| 223 | } |
| 224 | name = p; |
| 225 | if (excludeCtr > 0 && exclude(name)) |
| 226 | goto err; |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | /* name will be what is matched in the policy */ |
| 231 | if (NULL != rootpath) { |
| 232 | if (0 != strncmp(rootpath, name, rootpathlen)) { |
| 233 | bb_error_msg("%s is not located in %s", |
| 234 | name, rootpath); |
| 235 | goto err; |
| 236 | } |
| 237 | name += rootpathlen; |
| 238 | } |
| 239 | |
| 240 | free(tmp_path); |
| 241 | if (rootpath != NULL && name[0] == '\0') |
| 242 | /* this is actually the root dir of the alt root */ |
| 243 | return matchpathcon_index("/", sb->st_mode, con); |
| 244 | return matchpathcon_index(name, sb->st_mode, con); |
| 245 | err: |
| 246 | free(tmp_path); |
| 247 | return -1; |
| 248 | } |
| 249 | |
| 250 | /* Compare two contexts to see if their differences are "significant", |
| 251 | * or whether the only difference is in the user. */ |
Denis Vlasenko | 1da7772 | 2007-07-24 06:17:43 +0000 | [diff] [blame] | 252 | static bool only_changed_user(const char *a, const char *b) |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 253 | { |
| 254 | if (FLAG_F_force) |
| 255 | return 0; |
| 256 | if (!a || !b) |
| 257 | return 0; |
| 258 | a = strchr(a, ':'); /* Rest of the context after the user */ |
| 259 | b = strchr(b, ':'); |
| 260 | if (!a || !b) |
| 261 | return 0; |
| 262 | return (strcmp(a, b) == 0); |
| 263 | } |
| 264 | |
| 265 | static int restore(const char *file) |
| 266 | { |
Denis Vlasenko | 6a2f7f4 | 2007-08-16 10:35:17 +0000 | [diff] [blame] | 267 | char *my_file; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 268 | struct stat my_sb; |
| 269 | int i, j, ret; |
| 270 | char *context = NULL; |
| 271 | char *newcon = NULL; |
Denis Vlasenko | 1da7772 | 2007-07-24 06:17:43 +0000 | [diff] [blame] | 272 | bool user_only_changed = 0; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 273 | int retval = 0; |
Denis Vlasenko | 6a2f7f4 | 2007-08-16 10:35:17 +0000 | [diff] [blame] | 274 | |
| 275 | my_file = bb_simplify_path(file); |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 276 | |
| 277 | i = match(my_file, &my_sb, &newcon); |
| 278 | |
| 279 | if (i < 0) /* No matching specification. */ |
| 280 | goto out; |
| 281 | |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 282 | if (FLAG_p_progress) { |
| 283 | count++; |
| 284 | if (count % 0x400 == 0) { /* every 1024 times */ |
| 285 | count = (count % (80*0x400)); |
| 286 | if (count == 0) |
Denis Vlasenko | 4daad90 | 2007-09-27 10:20:47 +0000 | [diff] [blame] | 287 | bb_putchar('\n'); |
| 288 | bb_putchar('*'); |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 289 | fflush(stdout); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * Try to add an association between this inode and |
| 295 | * this specification. If there is already an association |
| 296 | * for this inode and it conflicts with this specification, |
| 297 | * then use the last matching specification. |
| 298 | */ |
| 299 | if (add_assoc) { |
| 300 | j = matchpathcon_filespec_add(my_sb.st_ino, i, my_file); |
| 301 | if (j < 0) |
| 302 | goto err; |
| 303 | |
| 304 | if (j != i) { |
| 305 | /* There was already an association and it took precedence. */ |
| 306 | goto out; |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | if (FLAG_d_debug) |
| 311 | printf("%s: %s matched by %s\n", applet_name, my_file, newcon); |
| 312 | |
| 313 | /* Get the current context of the file. */ |
| 314 | ret = lgetfilecon_raw(my_file, &context); |
| 315 | if (ret < 0) { |
| 316 | if (errno == ENODATA) { |
| 317 | context = NULL; /* paranoia */ |
| 318 | } else { |
| 319 | bb_perror_msg("lgetfilecon_raw on %s", my_file); |
| 320 | goto err; |
| 321 | } |
| 322 | user_only_changed = 0; |
| 323 | } else |
| 324 | user_only_changed = only_changed_user(context, newcon); |
| 325 | |
| 326 | /* |
| 327 | * Do not relabel the file if the matching specification is |
| 328 | * <<none>> or the file is already labeled according to the |
| 329 | * specification. |
| 330 | */ |
| 331 | if ((strcmp(newcon, "<<none>>") == 0) |
| 332 | || (context && (strcmp(context, newcon) == 0) && !FLAG_F_force)) { |
| 333 | goto out; |
| 334 | } |
| 335 | |
| 336 | if (!FLAG_F_force && context && (is_context_customizable(context) > 0)) { |
| 337 | if (verbose > 1) { |
| 338 | bb_error_msg("skipping %s. %s is customizable_types", |
| 339 | my_file, context); |
| 340 | } |
| 341 | goto out; |
| 342 | } |
| 343 | |
| 344 | if (verbose) { |
| 345 | /* If we're just doing "-v", trim out any relabels where |
| 346 | * the user has changed but the role and type are the |
| 347 | * same. For "-vv", emit everything. */ |
| 348 | if (verbose > 1 || !user_only_changed) { |
| 349 | bb_info_msg("%s: reset %s context %s->%s", |
| 350 | applet_name, my_file, context ?: "", newcon); |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | if (FLAG_l_take_log && !user_only_changed) { |
| 355 | if (context) |
| 356 | bb_info_msg("relabeling %s from %s to %s", my_file, context, newcon); |
| 357 | else |
| 358 | bb_info_msg("labeling %s to %s", my_file, newcon); |
| 359 | } |
| 360 | |
| 361 | if (outfile && !user_only_changed) |
| 362 | fprintf(outfile, "%s\n", my_file); |
| 363 | |
| 364 | /* |
| 365 | * Do not relabel the file if -n was used. |
| 366 | */ |
| 367 | if (FLAG_n_dry_run || user_only_changed) |
| 368 | goto out; |
| 369 | |
| 370 | /* |
| 371 | * Relabel the file to the specified context. |
| 372 | */ |
| 373 | ret = lsetfilecon(my_file, newcon); |
| 374 | if (ret) { |
| 375 | bb_perror_msg("lsetfileconon(%s,%s)", my_file, newcon); |
| 376 | goto err; |
| 377 | } |
| 378 | |
| 379 | out: |
| 380 | freecon(context); |
| 381 | freecon(newcon); |
Denis Vlasenko | 84d71f3 | 2007-08-06 02:36:35 +0000 | [diff] [blame] | 382 | free(my_file); |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 383 | return retval; |
| 384 | err: |
| 385 | retval--; /* -1 */ |
| 386 | goto out; |
| 387 | } |
| 388 | |
| 389 | /* |
| 390 | * Apply the last matching specification to a file. |
| 391 | * This function is called by recursive_action on each file during |
| 392 | * the directory traversal. |
| 393 | */ |
| 394 | static int apply_spec(const char *file, |
| 395 | struct stat *sb, void *userData, int depth) |
| 396 | { |
| 397 | if (!follow_mounts) { |
| 398 | /* setfiles does not process across different mount points */ |
| 399 | if (sb->st_dev != dev_id) { |
| 400 | return SKIP; |
| 401 | } |
| 402 | } |
| 403 | errors |= restore(file); |
| 404 | if (abort_on_error && errors) |
| 405 | return FALSE; |
| 406 | return TRUE; |
| 407 | } |
| 408 | |
| 409 | |
| 410 | static int canoncon(const char *path, unsigned lineno, char **contextp) |
| 411 | { |
Denis Vlasenko | 6ca409e | 2007-08-12 20:58:27 +0000 | [diff] [blame] | 412 | static const char err_msg[] ALIGN1 = "%s: line %u has invalid context %s"; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 413 | |
| 414 | char *tmpcon; |
| 415 | char *context = *contextp; |
| 416 | int invalid = 0; |
| 417 | |
| 418 | #if ENABLE_FEATURE_SETFILES_CHECK_OPTION |
| 419 | if (policyfile) { |
| 420 | if (sepol_check_context(context) >= 0) |
| 421 | return 0; |
| 422 | /* Exit immediately if we're in checking mode. */ |
| 423 | bb_error_msg_and_die(err_msg, path, lineno, context); |
| 424 | } |
| 425 | #endif |
| 426 | |
| 427 | if (security_canonicalize_context_raw(context, &tmpcon) < 0) { |
| 428 | if (errno != ENOENT) { |
| 429 | invalid = 1; |
| 430 | inc_err(); |
| 431 | } |
| 432 | } else { |
| 433 | free(context); |
| 434 | *contextp = tmpcon; |
| 435 | } |
| 436 | |
| 437 | if (invalid) { |
| 438 | bb_error_msg(err_msg, path, lineno, context); |
| 439 | } |
| 440 | |
| 441 | return invalid; |
| 442 | } |
| 443 | |
| 444 | static int process_one(char *name) |
| 445 | { |
| 446 | struct stat sb; |
| 447 | int rc; |
| 448 | |
| 449 | rc = lstat(name, &sb); |
| 450 | if (rc < 0) { |
| 451 | if (FLAG_i_ignore_enoent && errno == ENOENT) |
| 452 | return 0; |
| 453 | bb_perror_msg("stat(%s)", name); |
| 454 | goto err; |
| 455 | } |
| 456 | dev_id = sb.st_dev; |
| 457 | |
| 458 | if (S_ISDIR(sb.st_mode) && recurse) { |
| 459 | if (recursive_action(name, |
| 460 | ACTION_RECURSE, |
| 461 | apply_spec, |
| 462 | apply_spec, |
| 463 | NULL, 0) != TRUE) { |
| 464 | bb_error_msg("error while labeling %s", name); |
| 465 | goto err; |
| 466 | } |
| 467 | } else { |
| 468 | rc = restore(name); |
| 469 | if (rc) |
| 470 | goto err; |
| 471 | } |
| 472 | |
| 473 | out: |
| 474 | if (add_assoc) { |
| 475 | if (FLAG_q_quiet) |
| 476 | set_matchpathcon_printf(&qprintf); |
| 477 | matchpathcon_filespec_eval(); |
| 478 | set_matchpathcon_printf(NULL); |
| 479 | matchpathcon_filespec_destroy(); |
| 480 | } |
| 481 | |
| 482 | return rc; |
| 483 | |
| 484 | err: |
| 485 | rc = -1; |
| 486 | goto out; |
| 487 | } |
| 488 | |
| 489 | int setfiles_main(int argc, char **argv); |
| 490 | int setfiles_main(int argc, char **argv) |
| 491 | { |
| 492 | struct stat sb; |
| 493 | int rc, i = 0; |
| 494 | const char *input_filename = NULL; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 495 | char *buf = NULL; |
| 496 | size_t buf_len; |
| 497 | int flags; |
| 498 | llist_t *exclude_dir = NULL; |
| 499 | char *out_filename = NULL; |
| 500 | |
| 501 | INIT_G(); |
| 502 | |
| 503 | if (applet_name[0] == 's') { /* "setfiles" */ |
| 504 | /* |
| 505 | * setfiles: |
| 506 | * Recursive descent, |
| 507 | * Does not expand paths via realpath, |
| 508 | * Aborts on errors during the file tree walk, |
| 509 | * Try to track inode associations for conflict detection, |
| 510 | * Does not follow mounts, |
| 511 | * Validates all file contexts at init time. |
| 512 | */ |
| 513 | recurse = 1; |
| 514 | abort_on_error = 1; |
| 515 | add_assoc = 1; |
| 516 | /* follow_mounts = 0; - already is */ |
| 517 | matchpathcon_flags = MATCHPATHCON_VALIDATE | MATCHPATHCON_NOTRANS; |
| 518 | } else { |
| 519 | /* |
| 520 | * restorecon: |
| 521 | * No recursive descent unless -r/-R, |
| 522 | * Expands paths via realpath, |
| 523 | * Do not abort on errors during the file tree walk, |
| 524 | * Do not try to track inode associations for conflict detection, |
| 525 | * Follows mounts, |
| 526 | * Does lazy validation of contexts upon use. |
| 527 | */ |
| 528 | expand_realpath = 1; |
| 529 | follow_mounts = 1; |
| 530 | matchpathcon_flags = MATCHPATHCON_NOTRANS; |
| 531 | /* restorecon only */ |
| 532 | selinux_or_die(); |
| 533 | } |
| 534 | |
| 535 | set_matchpathcon_flags(matchpathcon_flags); |
| 536 | |
Denis Vlasenko | 1da7772 | 2007-07-24 06:17:43 +0000 | [diff] [blame] | 537 | opt_complementary = "e::vv:v--p:p--v:v--q:q--v"; |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 538 | /* Option order must match OPT_x definitions! */ |
| 539 | if (applet_name[0] == 'r') { /* restorecon */ |
Denis Vlasenko | fe7cd64 | 2007-08-18 15:32:12 +0000 | [diff] [blame] | 540 | flags = getopt32(argv, "de:f:ilnpqrsvo:FWR", |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 541 | &exclude_dir, &input_filename, &out_filename, &verbose); |
| 542 | } else { /* setfiles */ |
Denis Vlasenko | fe7cd64 | 2007-08-18 15:32:12 +0000 | [diff] [blame] | 543 | flags = getopt32(argv, "de:f:ilnpqr:svo:FW" |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 544 | USE_FEATURE_SETFILES_CHECK_OPTION("c:"), |
| 545 | &exclude_dir, &input_filename, &rootpath, &out_filename, |
| 546 | USE_FEATURE_SETFILES_CHECK_OPTION(&policyfile,) |
| 547 | &verbose); |
| 548 | } |
| 549 | |
| 550 | #if ENABLE_FEATURE_SETFILES_CHECK_OPTION |
| 551 | if ((applet_name[0] == 's') && (flags & OPT_c)) { |
| 552 | FILE *policystream; |
| 553 | |
| 554 | policystream = xfopen(policyfile, "r"); |
| 555 | if (sepol_set_policydb_from_file(policystream) < 0) { |
| 556 | bb_error_msg_and_die("sepol_set_policydb_from_file on %s", policyfile); |
| 557 | } |
| 558 | fclose(policystream); |
| 559 | |
| 560 | /* Only process the specified file_contexts file, not |
| 561 | any .homedirs or .local files, and do not perform |
| 562 | context translations. */ |
| 563 | set_matchpathcon_flags(MATCHPATHCON_BASEONLY | |
| 564 | MATCHPATHCON_NOTRANS | |
| 565 | MATCHPATHCON_VALIDATE); |
| 566 | } |
| 567 | #endif |
| 568 | |
Denis Vlasenko | 972fa09 | 2007-07-25 17:39:46 +0000 | [diff] [blame] | 569 | while (exclude_dir) |
| 570 | add_exclude(llist_pop(&exclude_dir)); |
| 571 | |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 572 | if (flags & OPT_o) { |
| 573 | outfile = stdout; |
| 574 | if (NOT_LONE_CHAR(out_filename, '-')) { |
| 575 | outfile = xfopen(out_filename, "w"); |
| 576 | } |
| 577 | } |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 578 | if (applet_name[0] == 'r') { /* restorecon */ |
| 579 | if (flags & (OPT_r | OPT_R)) |
| 580 | recurse = 1; |
| 581 | } else { /* setfiles */ |
| 582 | if (flags & OPT_r) |
| 583 | rootpathlen = strlen(rootpath); |
| 584 | } |
| 585 | if (flags & OPT_s) { |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 586 | input_filename = "-"; |
| 587 | add_assoc = 0; |
| 588 | } |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 589 | |
| 590 | if (applet_name[0] == 's') { /* setfiles */ |
| 591 | /* Use our own invalid context checking function so that |
| 592 | we can support either checking against the active policy or |
| 593 | checking against a binary policy file. */ |
| 594 | set_matchpathcon_canoncon(&canoncon); |
| 595 | if (argc == 1) |
| 596 | bb_show_usage(); |
| 597 | if (stat(argv[optind], &sb) < 0) { |
| 598 | bb_perror_msg_and_die("%s", argv[optind]); |
| 599 | } |
| 600 | if (!S_ISREG(sb.st_mode)) { |
| 601 | bb_error_msg_and_die("spec file %s is not a regular file", argv[optind]); |
| 602 | } |
| 603 | /* Load the file contexts configuration and check it. */ |
| 604 | rc = matchpathcon_init(argv[optind]); |
| 605 | if (rc < 0) { |
| 606 | bb_perror_msg_and_die("%s", argv[optind]); |
| 607 | } |
| 608 | |
| 609 | optind++; |
| 610 | |
| 611 | if (nerr) |
| 612 | exit(1); |
| 613 | } |
| 614 | |
Denis Vlasenko | 84d71f3 | 2007-08-06 02:36:35 +0000 | [diff] [blame] | 615 | if (input_filename) { |
Denis Vlasenko | 397137b | 2007-07-23 14:03:30 +0000 | [diff] [blame] | 616 | ssize_t len; |
| 617 | FILE *f = stdin; |
| 618 | |
| 619 | if (NOT_LONE_CHAR(input_filename, '-')) |
| 620 | f = xfopen(input_filename, "r"); |
| 621 | while ((len = getline(&buf, &buf_len, f)) > 0) { |
| 622 | buf[len - 1] = '\0'; |
| 623 | errors |= process_one(buf); |
| 624 | } |
| 625 | if (ENABLE_FEATURE_CLEAN_UP) |
| 626 | fclose_if_not_stdin(f); |
| 627 | } else { |
| 628 | if (optind >= argc) |
| 629 | bb_show_usage(); |
| 630 | for (i = optind; i < argc; i++) { |
| 631 | errors |= process_one(argv[i]); |
| 632 | } |
| 633 | } |
| 634 | |
| 635 | if (FLAG_W_warn_no_match) |
| 636 | matchpathcon_checkmatches(argv[0]); |
| 637 | |
| 638 | if (ENABLE_FEATURE_CLEAN_UP && outfile) |
| 639 | fclose(outfile); |
| 640 | |
| 641 | return errors; |
| 642 | } |