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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 | |
| 5 #include "bin/directory.h" | |
| 6 | |
| 7 #include <dirent.h> | |
| 8 #include <errno.h> | |
| 9 #include <sys/param.h> | |
| 10 #include <sys/stat.h> | |
| 11 #include <unistd.h> | |
| 12 | |
| 13 #include "bin/file.h" | |
| 14 #include "bin/platform.h" | |
| 15 | |
| 16 | |
| 17 static char* SafeStrNCpy(char* dest, const char* src, size_t n) { | |
| 18 strncpy(dest, src, n); | |
| 19 dest[n - 1] = '\0'; | |
| 20 return dest; | |
| 21 } | |
| 22 | |
| 23 | |
| 24 // Forward declarations. | |
| 25 static bool ListRecursively(const char* dir_name, | |
| 26 bool recursive, | |
| 27 DirectoryListing* listing); | |
| 28 static bool DeleteRecursively(const char* dir_name); | |
| 29 | |
| 30 | |
| 31 static bool ComputeFullPath(const char* dir_name, | |
| 32 char* path, | |
| 33 int* path_length) { | |
| 34 char* abs_path; | |
| 35 do { | |
| 36 abs_path = realpath(dir_name, path); | |
| 37 } while (abs_path == NULL && errno == EINTR); | |
| 38 if (abs_path == NULL) { | |
| 39 return false; | |
| 40 } | |
| 41 *path_length = strlen(path); | |
| 42 size_t written = snprintf(path + *path_length, | |
| 43 PATH_MAX - *path_length, | |
| 44 "%s", | |
| 45 File::PathSeparator()); | |
| 46 if (written != strlen(File::PathSeparator())) { | |
| 47 return false; | |
| 48 } | |
| 49 *path_length += written; | |
| 50 return true; | |
| 51 } | |
| 52 | |
| 53 | |
| 54 static bool HandleDir(char* dir_name, | |
| 55 char* path, | |
| 56 int path_length, | |
| 57 bool recursive, | |
| 58 DirectoryListing *listing) { | |
| 59 if (strcmp(dir_name, ".") != 0 && | |
| 60 strcmp(dir_name, "..") != 0) { | |
| 61 size_t written = snprintf(path + path_length, | |
| 62 PATH_MAX - path_length, | |
| 63 "%s", | |
| 64 dir_name); | |
| 65 if (written != strlen(dir_name)) { | |
| 66 return false; | |
| 67 } | |
| 68 bool ok = listing->HandleDirectory(path); | |
| 69 if (!ok) return ok; | |
| 70 if (recursive) { | |
| 71 return ListRecursively(path, recursive, listing); | |
| 72 } | |
| 73 } | |
| 74 return true; | |
| 75 } | |
| 76 | |
| 77 | |
| 78 static bool HandleFile(char* file_name, | |
| 79 char* path, | |
| 80 int path_length, | |
| 81 DirectoryListing *listing) { | |
| 82 // TODO(sgjesse): Pass flags to indicate whether file responses are | |
| 83 // needed. | |
| 84 size_t written = snprintf(path + path_length, | |
| 85 PATH_MAX - path_length, | |
| 86 "%s", | |
| 87 file_name); | |
| 88 if (written != strlen(file_name)) { | |
| 89 return false; | |
| 90 } | |
| 91 return listing->HandleFile(path); | |
| 92 } | |
| 93 | |
| 94 | |
| 95 static void PostError(DirectoryListing *listing, | |
| 96 const char* dir_name) { | |
| 97 listing->HandleError(dir_name); | |
| 98 } | |
| 99 | |
| 100 | |
| 101 static bool ListRecursively(const char* dir_name, | |
| 102 bool recursive, | |
| 103 DirectoryListing *listing) { | |
| 104 DIR* dir_pointer; | |
| 105 do { | |
| 106 dir_pointer = opendir(dir_name); | |
| 107 } while (dir_pointer == NULL && errno == EINTR); | |
| 108 if (dir_pointer == NULL) { | |
| 109 PostError(listing, dir_name); | |
| 110 return false; | |
| 111 } | |
| 112 | |
| 113 // Compute full path for the directory currently being listed. The | |
| 114 // path buffer will be used to construct the current path in the | |
| 115 // recursive traversal. path_length does not always equal | |
| 116 // strlen(path) but indicates the current prefix of path that is the | |
| 117 // path of the current directory in the traversal. | |
| 118 char *path = static_cast<char*>(malloc(PATH_MAX)); | |
| 119 ASSERT(path != NULL); | |
| 120 int path_length = 0; | |
| 121 bool valid = ComputeFullPath(dir_name, path, &path_length); | |
| 122 if (!valid) { | |
| 123 free(path); | |
| 124 PostError(listing, dir_name); | |
| 125 return false; | |
| 126 } | |
| 127 | |
| 128 // Iterated the directory and post the directories and files to the | |
| 129 // ports. | |
| 130 int read = 0; | |
| 131 bool success = true; | |
| 132 dirent entry; | |
| 133 dirent* result; | |
| 134 while ((read = TEMP_FAILURE_RETRY(readdir_r(dir_pointer, | |
| 135 &entry, | |
| 136 &result))) == 0 && | |
| 137 result != NULL) { | |
| 138 switch (entry.d_type) { | |
| 139 case DT_DIR: | |
| 140 success = HandleDir(entry.d_name, | |
| 141 path, | |
| 142 path_length, | |
| 143 recursive, | |
| 144 listing) && success; | |
| 145 break; | |
| 146 case DT_REG: | |
| 147 success = HandleFile(entry.d_name, | |
| 148 path, | |
| 149 path_length, | |
| 150 listing) && success; | |
| 151 break; | |
| 152 case DT_LNK: | |
| 153 case DT_UNKNOWN: { | |
| 154 // On some file systems the entry type is not determined by | |
| 155 // readdir_r. For those and for links we use stat to determine | |
| 156 // the actual entry type. Notice that stat returns the type of | |
| 157 // the file pointed to. | |
| 158 struct stat entry_info; | |
| 159 size_t written = snprintf(path + path_length, | |
| 160 PATH_MAX - path_length, | |
| 161 "%s", | |
| 162 entry.d_name); | |
| 163 if (written != strlen(entry.d_name)) { | |
| 164 success = false; | |
| 165 break; | |
| 166 } | |
| 167 int stat_success = TEMP_FAILURE_RETRY(stat(path, &entry_info)); | |
| 168 if (stat_success == -1) { | |
| 169 success = false; | |
| 170 PostError(listing, path); | |
| 171 break; | |
| 172 } | |
| 173 if (S_ISDIR(entry_info.st_mode)) { | |
| 174 success = HandleDir(entry.d_name, | |
| 175 path, | |
| 176 path_length, | |
| 177 recursive, | |
| 178 listing) && success; | |
| 179 } else if (S_ISREG(entry_info.st_mode)) { | |
| 180 success = HandleFile(entry.d_name, | |
| 181 path, | |
| 182 path_length, | |
| 183 listing) && success; | |
| 184 } | |
| 185 ASSERT(!S_ISLNK(entry_info.st_mode)); | |
| 186 break; | |
| 187 } | |
| 188 default: | |
| 189 break; | |
| 190 } | |
| 191 } | |
| 192 | |
| 193 if (read != 0) { | |
| 194 errno = read; | |
| 195 success = false; | |
| 196 PostError(listing, dir_name); | |
| 197 } | |
| 198 | |
| 199 if (closedir(dir_pointer) == -1) { | |
| 200 success = false; | |
| 201 PostError(listing, dir_name); | |
| 202 } | |
| 203 free(path); | |
| 204 | |
| 205 return success; | |
| 206 } | |
| 207 | |
| 208 | |
| 209 static bool DeleteFile(char* file_name, | |
| 210 char* path, | |
| 211 int path_length) { | |
| 212 size_t written = snprintf(path + path_length, | |
| 213 PATH_MAX - path_length, | |
| 214 "%s", | |
| 215 file_name); | |
| 216 if (written != strlen(file_name)) { | |
| 217 return false; | |
| 218 } | |
| 219 return (remove(path) == 0); | |
| 220 } | |
| 221 | |
| 222 | |
| 223 static bool DeleteDir(char* dir_name, | |
| 224 char* path, | |
| 225 int path_length) { | |
| 226 if (strcmp(dir_name, ".") != 0 && | |
| 227 strcmp(dir_name, "..") != 0) { | |
| 228 size_t written = snprintf(path + path_length, | |
| 229 PATH_MAX - path_length, | |
| 230 "%s", | |
| 231 dir_name); | |
| 232 if (written != strlen(dir_name)) { | |
| 233 return false; | |
| 234 } | |
| 235 return DeleteRecursively(path); | |
| 236 } | |
| 237 return true; | |
| 238 } | |
| 239 | |
| 240 | |
| 241 static bool DeleteRecursively(const char* dir_name) { | |
| 242 // Do not recurse into links for deletion. Instead delete the link. | |
| 243 struct stat st; | |
| 244 if (TEMP_FAILURE_RETRY(lstat(dir_name, &st)) == -1) { | |
| 245 return false; | |
| 246 } else if (S_ISLNK(st.st_mode)) { | |
| 247 return (remove(dir_name) == 0); | |
| 248 } | |
| 249 | |
| 250 // Not a link. Attempt to open as a directory and recurse into the | |
| 251 // directory. | |
| 252 DIR* dir_pointer; | |
| 253 do { | |
| 254 dir_pointer = opendir(dir_name); | |
| 255 } while (dir_pointer == NULL && errno == EINTR); | |
| 256 | |
| 257 if (dir_pointer == NULL) { | |
| 258 return false; | |
| 259 } | |
| 260 | |
| 261 // Compute full path for the directory currently being deleted. The | |
| 262 // path buffer will be used to construct the current path in the | |
| 263 // recursive traversal. path_length does not always equal | |
| 264 // strlen(path) but indicates the current prefix of path that is the | |
| 265 // path of the current directory in the traversal. | |
| 266 char *path = static_cast<char*>(malloc(PATH_MAX)); | |
| 267 ASSERT(path != NULL); | |
| 268 int path_length = 0; | |
| 269 bool valid = ComputeFullPath(dir_name, path, &path_length); | |
| 270 if (!valid) { | |
| 271 free(path); | |
| 272 return false; | |
| 273 } | |
| 274 | |
| 275 // Iterate the directory and delete all files and directories. | |
| 276 int read = 0; | |
| 277 bool success = true; | |
| 278 dirent entry; | |
| 279 dirent* result; | |
| 280 while ((read = TEMP_FAILURE_RETRY(readdir_r(dir_pointer, | |
| 281 &entry, | |
| 282 &result))) == 0 && | |
| 283 result != NULL && | |
| 284 success) { | |
| 285 switch (entry.d_type) { | |
| 286 case DT_DIR: | |
| 287 success = success && DeleteDir(entry.d_name, path, path_length); | |
| 288 break; | |
| 289 case DT_REG: | |
| 290 case DT_LNK: | |
| 291 // Treat all links as files. This will delete the link which | |
| 292 // is what we want no matter if the link target is a file or a | |
| 293 // directory. | |
| 294 success = success && DeleteFile(entry.d_name, path, path_length); | |
| 295 break; | |
| 296 case DT_UNKNOWN: { | |
| 297 // On some file systems the entry type is not determined by | |
| 298 // readdir_r. For those we use lstat to determine the entry | |
| 299 // type. | |
| 300 struct stat entry_info; | |
| 301 size_t written = snprintf(path + path_length, | |
| 302 PATH_MAX - path_length, | |
| 303 "%s", | |
| 304 entry.d_name); | |
| 305 if (written != strlen(entry.d_name)) { | |
| 306 success = false; | |
| 307 break; | |
| 308 } | |
| 309 int lstat_success = TEMP_FAILURE_RETRY(lstat(path, &entry_info)); | |
| 310 if (lstat_success == -1) { | |
| 311 success = false; | |
| 312 break; | |
| 313 } | |
| 314 if (S_ISDIR(entry_info.st_mode)) { | |
| 315 success = success && DeleteDir(entry.d_name, path, path_length); | |
| 316 } else if (S_ISREG(entry_info.st_mode) || S_ISLNK(entry_info.st_mode)) { | |
| 317 // Treat links as files. This will delete the link which is | |
| 318 // what we want no matter if the link target is a file or a | |
| 319 // directory. | |
| 320 success = success && DeleteFile(entry.d_name, path, path_length); | |
| 321 } | |
| 322 break; | |
| 323 } | |
| 324 default: | |
| 325 break; | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 free(path); | |
| 330 | |
| 331 if ((read != 0) || | |
| 332 (closedir(dir_pointer) == -1) || | |
| 333 (remove(dir_name) == -1)) { | |
| 334 return false; | |
| 335 } | |
| 336 | |
| 337 return success; | |
| 338 } | |
| 339 | |
| 340 | |
| 341 bool Directory::List(const char* dir_name, | |
| 342 bool recursive, | |
| 343 DirectoryListing *listing) { | |
| 344 bool completed = ListRecursively(dir_name, recursive, listing); | |
| 345 return completed; | |
| 346 } | |
| 347 | |
| 348 | |
| 349 Directory::ExistsResult Directory::Exists(const char* dir_name) { | |
| 350 struct stat entry_info; | |
| 351 int success = TEMP_FAILURE_RETRY(stat(dir_name, &entry_info)); | |
| 352 if (success == 0) { | |
| 353 if (S_ISDIR(entry_info.st_mode)) { | |
| 354 return EXISTS; | |
| 355 } else { | |
| 356 return DOES_NOT_EXIST; | |
| 357 } | |
| 358 } else { | |
| 359 if (errno == EACCES || | |
| 360 errno == EBADF || | |
| 361 errno == EFAULT || | |
| 362 errno == ENOMEM || | |
| 363 errno == EOVERFLOW) { | |
| 364 // Search permissions denied for one of the directories in the | |
| 365 // path or a low level error occured. We do not know if the | |
| 366 // directory exists. | |
| 367 return UNKNOWN; | |
| 368 } | |
| 369 ASSERT(errno == ELOOP || | |
| 370 errno == ENAMETOOLONG || | |
| 371 errno == ENOENT || | |
| 372 errno == ENOTDIR); | |
| 373 return DOES_NOT_EXIST; | |
| 374 } | |
| 375 } | |
| 376 | |
| 377 | |
| 378 char* Directory::Current() { | |
| 379 return getcwd(NULL, 0); | |
| 380 } | |
| 381 | |
| 382 | |
| 383 bool Directory::Create(const char* dir_name) { | |
| 384 // Create the directory with the permissions specified by the | |
| 385 // process umask. | |
| 386 return (TEMP_FAILURE_RETRY(mkdir(dir_name, 0777)) == 0); | |
| 387 } | |
| 388 | |
| 389 | |
| 390 char* Directory::CreateTemp(const char* const_template) { | |
| 391 // Returns a new, unused directory name, modifying the contents of | |
| 392 // dir_template. Creates the directory with the permissions specified | |
| 393 // by the process umask. | |
| 394 // The return value must be freed by the caller. | |
| 395 char* path = static_cast<char*>(malloc(PATH_MAX + 1)); | |
| 396 SafeStrNCpy(path, const_template, PATH_MAX + 1); | |
| 397 int path_length = strlen(path); | |
| 398 if (path_length > 0) { | |
| 399 if ((path)[path_length - 1] == '/') { | |
| 400 snprintf(path + path_length, PATH_MAX - path_length, "temp_dir_XXXXXX"); | |
| 401 } else { | |
| 402 snprintf(path + path_length, PATH_MAX - path_length, "XXXXXX"); | |
| 403 } | |
| 404 } else { | |
| 405 snprintf(path, PATH_MAX, "/tmp/temp_dir1_XXXXXX"); | |
| 406 } | |
| 407 char* result; | |
| 408 do { | |
| 409 result = mkdtemp(path); | |
| 410 } while (result == NULL && errno == EINTR); | |
| 411 if (result == NULL) { | |
| 412 free(path); | |
| 413 return NULL; | |
| 414 } | |
| 415 return path; | |
| 416 } | |
| 417 | |
| 418 | |
| 419 bool Directory::Delete(const char* dir_name, bool recursive) { | |
| 420 if (!recursive) { | |
| 421 return (TEMP_FAILURE_RETRY(remove(dir_name)) == 0); | |
| 422 } else { | |
| 423 return DeleteRecursively(dir_name); | |
| 424 } | |
| 425 } | |
| 426 | |
| 427 | |
| 428 bool Directory::Rename(const char* path, const char* new_path) { | |
| 429 ExistsResult exists = Exists(path); | |
| 430 if (exists != EXISTS) return false; | |
| 431 return (TEMP_FAILURE_RETRY(rename(path, new_path)) == 0); | |
| 432 } | |
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Chromium Code Reviews
Issue 10826233:
Add _android files for building DartVM on Android (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart