Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 1 | /* Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 | * Use of this source code is governed by a BSD-style license that can be |
| 3 | * found in the LICENSE file. |
| 4 | */ |
| 5 | |
| 6 | #include "handlers.h" |
| 7 | |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 8 | #include <arpa/inet.h> |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 9 | #include <assert.h> |
| 10 | #include <errno.h> |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 11 | #include <netdb.h> |
| 12 | #include <netinet/in.h> |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 13 | #include <stdio.h> |
| 14 | #include <stdlib.h> |
| 15 | #include <string.h> |
Torne (Richard Coles) | a93a17c | 2013-05-15 11:34:50 +0100 | [diff] [blame] | 16 | |
| 17 | #include <sys/types.h> |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 18 | #include <sys/socket.h> |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 19 | #include <sys/stat.h> |
| 20 | |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 21 | #include "nacl_io/osdirent.h" |
| 22 | |
Torne (Richard Coles) | b2df76e | 2013-05-13 16:52:09 +0100 | [diff] [blame] | 23 | #include "nacl_io_demo.h" |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 24 | |
| 25 | #define MAX_OPEN_FILES 10 |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 26 | #define MAX_OPEN_DIRS 10 |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 27 | |
Torne (Richard Coles) | a93a17c | 2013-05-15 11:34:50 +0100 | [diff] [blame] | 28 | #if defined(WIN32) |
| 29 | #define stat _stat |
| 30 | #endif |
| 31 | |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 32 | /** |
| 33 | * A mapping from int -> FILE*, so the JavaScript messages can refer to an open |
| 34 | * File. */ |
| 35 | static FILE* g_OpenFiles[MAX_OPEN_FILES]; |
| 36 | |
| 37 | /** |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 38 | * A mapping from int -> DIR*, so the JavaScript messages can refer to an open |
| 39 | * Directory. */ |
| 40 | static void* g_OpenDirs[MAX_OPEN_DIRS]; |
| 41 | |
| 42 | /** |
| 43 | * Add |object| to |map| and return the index it was added at. |
| 44 | * @param[in] map The map to add the object to. |
| 45 | * @param[in] max_map_size The maximum map size. |
| 46 | * @param[in] object The object to add to the map. |
| 47 | * @return int The index of the added object, or -1 if there is no more space. |
| 48 | */ |
| 49 | static int AddToMap(void** map, int max_map_size, void* object) { |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 50 | int i; |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 51 | assert(object != NULL); |
| 52 | for (i = 0; i < max_map_size; ++i) { |
| 53 | if (map[i] == NULL) { |
| 54 | map[i] = object; |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 55 | return i; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | return -1; |
| 60 | } |
| 61 | |
| 62 | /** |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 63 | * Remove an object at index |i| from |map|. |
| 64 | * @param[in] map The map to remove from. |
| 65 | * @param[in] max_map_size The size of the map. |
| 66 | * @param[in] i The index to remove. |
| 67 | */ |
| 68 | static void RemoveFromMap(void** map, int max_map_size, int i) { |
| 69 | assert(i >= 0 && i < max_map_size); |
| 70 | map[i] = NULL; |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * Get the object from |map| at index |i|. |
| 75 | * @param[in] map The map to access. |
| 76 | * @param[in] max_map_size The size of the map. |
| 77 | * @param[in] i The index to access. |
| 78 | * @return the object at |map|. This will be NULL if there is no object at |i|. |
| 79 | */ |
| 80 | static void* GetFromMap(void** map, int max_map_size, int i) { |
| 81 | assert(i >= 0 && i < max_map_size); |
| 82 | return map[i]; |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Get an object given a string |s| containing the index. |
| 87 | * @param[in] map The map to access. |
| 88 | * @param[in] max_map_size The size of the map. |
| 89 | * @param[in] s The string containing the object index. |
| 90 | * @param[out] index The index of the object as an int. |
| 91 | * @return The object, or NULL if the index is invalid. |
| 92 | */ |
| 93 | static void* GetFromIndexString(void** map, |
| 94 | int max_map_size, |
| 95 | const char* s, |
| 96 | int* index) { |
| 97 | char* endptr; |
| 98 | int result = strtol(s, &endptr, 10); |
| 99 | if (endptr != s + strlen(s)) { |
| 100 | /* Garbage at the end of the number...? */ |
| 101 | return NULL; |
| 102 | } |
| 103 | |
| 104 | if (index) |
| 105 | *index = result; |
| 106 | |
| 107 | return GetFromMap(map, max_map_size, result); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Add the file to the g_OpenFiles map. |
| 112 | * @param[in] file The file to add to g_OpenFiles. |
| 113 | * @return int The index of the FILE in g_OpenFiles, or -1 if there are too many |
| 114 | * open files. */ |
| 115 | static int AddFileToMap(FILE* file) { |
| 116 | return AddToMap((void**)g_OpenFiles, MAX_OPEN_FILES, file); |
| 117 | } |
| 118 | |
| 119 | /** |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 120 | * Remove the file from the g_OpenFiles map. |
| 121 | * @param[in] i The index of the file handle to remove. */ |
| 122 | static void RemoveFileFromMap(int i) { |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 123 | RemoveFromMap((void**)g_OpenFiles, MAX_OPEN_FILES, i); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /** |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 127 | * Get a file, given a string containing the index. |
| 128 | * @param[in] s The string containing the file index. |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 129 | * @param[out] file_index The index of this file. |
| 130 | * @return The FILE* for this file, or NULL if the index is invalid. |
| 131 | */ |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 132 | static FILE* GetFileFromIndexString(const char* s, int* file_index) { |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 133 | return (FILE*)GetFromIndexString( |
| 134 | (void**)g_OpenFiles, MAX_OPEN_FILES, s, file_index); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 135 | } |
| 136 | |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 137 | /* Win32 doesn't support DIR/opendir/readdir/closedir. */ |
| 138 | #if !defined(WIN32) |
| 139 | /** |
| 140 | * Add the dir to the g_OpenDirs map. |
| 141 | * @param[in] dir The dir to add to g_OpenDirs. |
| 142 | * @return int The index of the DIR in g_OpenDirs, or -1 if there are too many |
| 143 | * open dirs. */ |
| 144 | static int AddDirToMap(DIR* dir) { |
| 145 | return AddToMap((void**)g_OpenDirs, MAX_OPEN_DIRS, dir); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Remove the dir from the g_OpenDirs map. |
| 150 | * @param[in] i The index of the dir handle to remove. */ |
| 151 | static void RemoveDirFromMap(int i) { |
| 152 | RemoveFromMap((void**)g_OpenDirs, MAX_OPEN_DIRS, i); |
| 153 | } |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 154 | |
| 155 | /** |
| 156 | * Get a dir, given a string containing the index. |
| 157 | * @param[in] s The string containing the dir index. |
| 158 | * @param[out] dir_index The index of this dir. |
| 159 | * @return The DIR* for this dir, or NULL if the index is invalid. |
| 160 | */ |
| 161 | static DIR* GetDirFromIndexString(const char* s, int* dir_index) { |
| 162 | return (DIR*)GetFromIndexString( |
| 163 | (void**)g_OpenDirs, MAX_OPEN_DIRS, s, dir_index); |
| 164 | } |
| 165 | #endif |
| 166 | |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 167 | /** |
| 168 | * Handle a call to fopen() made by JavaScript. |
| 169 | * |
| 170 | * fopen expects 2 parameters: |
| 171 | * 0: the path of the file to open |
| 172 | * 1: the mode string |
| 173 | * on success, fopen returns a result in |output| separated by \1: |
| 174 | * 0: "fopen" |
| 175 | * 1: the filename opened |
| 176 | * 2: the file index |
| 177 | * on failure, fopen returns an error string in |output|. |
| 178 | * |
| 179 | * @param[in] num_params The number of params in |params|. |
| 180 | * @param[in] params An array of strings, parameters to this function. |
| 181 | * @param[out] output A string to write informational function output to. |
| 182 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 183 | int HandleFopen(int num_params, char** params, char** output) { |
| 184 | FILE* file; |
| 185 | int file_index; |
| 186 | const char* filename; |
| 187 | const char* mode; |
| 188 | |
| 189 | if (num_params != 2) { |
| 190 | *output = PrintfToNewString("Error: fopen takes 2 parameters."); |
| 191 | return 1; |
| 192 | } |
| 193 | |
| 194 | filename = params[0]; |
| 195 | mode = params[1]; |
| 196 | |
| 197 | file = fopen(filename, mode); |
| 198 | if (!file) { |
| 199 | *output = PrintfToNewString("Error: fopen returned a NULL FILE*."); |
| 200 | return 2; |
| 201 | } |
| 202 | |
| 203 | file_index = AddFileToMap(file); |
| 204 | if (file_index == -1) { |
| 205 | *output = PrintfToNewString( |
| 206 | "Error: Example only allows %d open file handles.", MAX_OPEN_FILES); |
| 207 | return 3; |
| 208 | } |
| 209 | |
| 210 | *output = PrintfToNewString("fopen\1%s\1%d", filename, file_index); |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | /** |
| 215 | * Handle a call to fwrite() made by JavaScript. |
| 216 | * |
| 217 | * fwrite expects 2 parameters: |
| 218 | * 0: The index of the file (which is mapped to a FILE*) |
| 219 | * 1: A string to write to the file |
| 220 | * on success, fwrite returns a result in |output| separated by \1: |
| 221 | * 0: "fwrite" |
| 222 | * 1: the file index |
| 223 | * 2: the number of bytes written |
| 224 | * on failure, fwrite returns an error string in |output|. |
| 225 | * |
| 226 | * @param[in] num_params The number of params in |params|. |
| 227 | * @param[in] params An array of strings, parameters to this function. |
| 228 | * @param[out] output A string to write informational function output to. |
| 229 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 230 | int HandleFwrite(int num_params, char** params, char** output) { |
| 231 | FILE* file; |
| 232 | const char* file_index_string; |
| 233 | const char* data; |
| 234 | size_t data_len; |
| 235 | size_t bytes_written; |
| 236 | |
| 237 | if (num_params != 2) { |
| 238 | *output = PrintfToNewString("Error: fwrite takes 2 parameters."); |
| 239 | return 1; |
| 240 | } |
| 241 | |
| 242 | file_index_string = params[0]; |
| 243 | file = GetFileFromIndexString(file_index_string, NULL); |
| 244 | data = params[1]; |
| 245 | data_len = strlen(data); |
| 246 | |
| 247 | if (!file) { |
| 248 | *output = |
| 249 | PrintfToNewString("Error: Unknown file handle %s.", file_index_string); |
| 250 | return 2; |
| 251 | } |
| 252 | |
| 253 | bytes_written = fwrite(data, 1, data_len, file); |
| 254 | |
| 255 | if (ferror(file)) { |
| 256 | *output = PrintfToNewString( |
| 257 | "Error: Wrote %d bytes, but ferror() returns true.", bytes_written); |
| 258 | return 3; |
| 259 | } |
| 260 | |
| 261 | *output = |
| 262 | PrintfToNewString("fwrite\1%s\1%d", file_index_string, bytes_written); |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Handle a call to fread() made by JavaScript. |
| 268 | * |
| 269 | * fread expects 2 parameters: |
| 270 | * 0: The index of the file (which is mapped to a FILE*) |
| 271 | * 1: The number of bytes to read from the file. |
| 272 | * on success, fread returns a result in |output| separated by \1: |
| 273 | * 0: "fread" |
| 274 | * 1: the file index |
| 275 | * 2: the data read from the file |
| 276 | * on failure, fread returns an error string in |output|. |
| 277 | * |
| 278 | * @param[in] num_params The number of params in |params|. |
| 279 | * @param[in] params An array of strings, parameters to this function. |
| 280 | * @param[out] output A string to write informational function output to. |
| 281 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 282 | int HandleFread(int num_params, char** params, char** output) { |
| 283 | FILE* file; |
| 284 | const char* file_index_string; |
| 285 | char* buffer; |
| 286 | size_t data_len; |
| 287 | size_t bytes_read; |
| 288 | |
| 289 | if (num_params != 2) { |
| 290 | *output = PrintfToNewString("Error: fread takes 2 parameters."); |
| 291 | return 1; |
| 292 | } |
| 293 | |
| 294 | file_index_string = params[0]; |
| 295 | file = GetFileFromIndexString(file_index_string, NULL); |
| 296 | data_len = strtol(params[1], NULL, 10); |
| 297 | |
| 298 | if (!file) { |
| 299 | *output = |
| 300 | PrintfToNewString("Error: Unknown file handle %s.", file_index_string); |
| 301 | return 2; |
| 302 | } |
| 303 | |
| 304 | buffer = (char*)malloc(data_len + 1); |
| 305 | bytes_read = fread(buffer, 1, data_len, file); |
| 306 | buffer[bytes_read] = 0; |
| 307 | |
| 308 | if (ferror(file)) { |
| 309 | *output = PrintfToNewString( |
| 310 | "Error: Read %d bytes, but ferror() returns true.", bytes_read); |
| 311 | return 3; |
| 312 | } |
| 313 | |
| 314 | *output = PrintfToNewString("fread\1%s\1%s", file_index_string, buffer); |
| 315 | free(buffer); |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | /** |
| 320 | * Handle a call to fseek() made by JavaScript. |
| 321 | * |
| 322 | * fseek expects 3 parameters: |
| 323 | * 0: The index of the file (which is mapped to a FILE*) |
| 324 | * 1: The offset to seek to |
| 325 | * 2: An integer representing the whence parameter of standard fseek. |
| 326 | * whence = 0: seek from the beginning of the file |
| 327 | * whence = 1: seek from the current file position |
| 328 | * whence = 2: seek from the end of the file |
| 329 | * on success, fseek returns a result in |output| separated by \1: |
| 330 | * 0: "fseek" |
| 331 | * 1: the file index |
| 332 | * 2: The new file position |
| 333 | * on failure, fseek returns an error string in |output|. |
| 334 | * |
| 335 | * @param[in] num_params The number of params in |params|. |
| 336 | * @param[in] params An array of strings, parameters to this function. |
| 337 | * @param[out] output A string to write informational function output to. |
| 338 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 339 | int HandleFseek(int num_params, char** params, char** output) { |
| 340 | FILE* file; |
| 341 | const char* file_index_string; |
| 342 | long offset; |
| 343 | int whence; |
| 344 | int result; |
| 345 | |
| 346 | if (num_params != 3) { |
| 347 | *output = PrintfToNewString("Error: fseek takes 3 parameters."); |
| 348 | return 1; |
| 349 | } |
| 350 | |
| 351 | file_index_string = params[0]; |
| 352 | file = GetFileFromIndexString(file_index_string, NULL); |
| 353 | offset = strtol(params[1], NULL, 10); |
| 354 | whence = strtol(params[2], NULL, 10); |
| 355 | |
| 356 | if (!file) { |
| 357 | *output = |
| 358 | PrintfToNewString("Error: Unknown file handle %s.", file_index_string); |
| 359 | return 2; |
| 360 | } |
| 361 | |
| 362 | result = fseek(file, offset, whence); |
| 363 | if (result) { |
| 364 | *output = PrintfToNewString("Error: fseek returned error %d.", result); |
| 365 | return 3; |
| 366 | } |
| 367 | |
| 368 | offset = ftell(file); |
| 369 | if (offset < 0) { |
| 370 | *output = PrintfToNewString( |
| 371 | "Error: fseek succeeded, but ftell returned error %d.", offset); |
| 372 | return 4; |
| 373 | } |
| 374 | |
| 375 | *output = PrintfToNewString("fseek\1%s\1%d", file_index_string, offset); |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | /** |
| 380 | * Handle a call to fclose() made by JavaScript. |
| 381 | * |
| 382 | * fclose expects 1 parameter: |
| 383 | * 0: The index of the file (which is mapped to a FILE*) |
| 384 | * on success, fclose returns a result in |output| separated by \1: |
| 385 | * 0: "fclose" |
| 386 | * 1: the file index |
| 387 | * on failure, fclose returns an error string in |output|. |
| 388 | * |
| 389 | * @param[in] num_params The number of params in |params|. |
| 390 | * @param[in] params An array of strings, parameters to this function. |
| 391 | * @param[out] output A string to write informational function output to. |
| 392 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 393 | int HandleFclose(int num_params, char** params, char** output) { |
| 394 | FILE* file; |
| 395 | int file_index; |
| 396 | const char* file_index_string; |
| 397 | int result; |
| 398 | |
| 399 | if (num_params != 1) { |
| 400 | *output = PrintfToNewString("Error: fclose takes 1 parameters."); |
| 401 | return 1; |
| 402 | } |
| 403 | |
| 404 | file_index_string = params[0]; |
| 405 | file = GetFileFromIndexString(file_index_string, &file_index); |
| 406 | if (!file) { |
| 407 | *output = |
| 408 | PrintfToNewString("Error: Unknown file handle %s.", file_index_string); |
| 409 | return 2; |
| 410 | } |
| 411 | |
| 412 | result = fclose(file); |
| 413 | if (result) { |
| 414 | *output = PrintfToNewString("Error: fclose returned error %d.", result); |
| 415 | return 3; |
| 416 | } |
| 417 | |
| 418 | RemoveFileFromMap(file_index); |
| 419 | |
| 420 | *output = PrintfToNewString("fclose\1%s", file_index_string); |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | /** |
| 425 | * Handle a call to stat() made by JavaScript. |
| 426 | * |
| 427 | * stat expects 1 parameter: |
| 428 | * 0: The name of the file |
| 429 | * on success, stat returns a result in |output| separated by \1: |
| 430 | * 0: "stat" |
| 431 | * 1: the file name |
| 432 | * 2: the size of the file |
| 433 | * on failure, stat returns an error string in |output|. |
| 434 | * |
| 435 | * @param[in] num_params The number of params in |params|. |
| 436 | * @param[in] params An array of strings, parameters to this function. |
| 437 | * @param[out] output A string to write informational function output to. |
| 438 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 439 | int HandleStat(int num_params, char** params, char** output) { |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 440 | const char* filename; |
Torne (Richard Coles) | a93a17c | 2013-05-15 11:34:50 +0100 | [diff] [blame] | 441 | int result; |
| 442 | struct stat buf; |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 443 | |
| 444 | if (num_params != 1) { |
| 445 | *output = PrintfToNewString("Error: stat takes 1 parameter."); |
| 446 | return 1; |
| 447 | } |
| 448 | |
| 449 | filename = params[0]; |
| 450 | |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 451 | memset(&buf, 0, sizeof(buf)); |
Torne (Richard Coles) | a93a17c | 2013-05-15 11:34:50 +0100 | [diff] [blame] | 452 | result = stat(filename, &buf); |
Torne (Richard Coles) | c2e0dbd | 2013-05-09 18:35:53 +0100 | [diff] [blame] | 453 | if (result == -1) { |
| 454 | *output = PrintfToNewString("Error: stat returned error %d.", errno); |
| 455 | return 2; |
| 456 | } |
| 457 | |
| 458 | *output = PrintfToNewString("stat\1%s\1%d", filename, buf.st_size); |
| 459 | return 0; |
| 460 | } |
Ben Murdoch | 7dbb3d5 | 2013-07-17 14:55:54 +0100 | [diff] [blame] | 461 | |
| 462 | /** |
| 463 | * Handle a call to opendir() made by JavaScript. |
| 464 | * |
| 465 | * opendir expects 1 parameter: |
| 466 | * 0: The name of the directory |
| 467 | * on success, opendir returns a result in |output| separated by \1: |
| 468 | * 0: "opendir" |
| 469 | * 1: the directory name |
| 470 | * 2: the index of the directory |
| 471 | * on failure, opendir returns an error string in |output|. |
| 472 | * |
| 473 | * @param[in] num_params The number of params in |params|. |
| 474 | * @param[in] params An array of strings, parameters to this function. |
| 475 | * @param[out] output A string to write informational function output to. |
| 476 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 477 | int HandleOpendir(int num_params, char** params, char** output) { |
| 478 | #if defined(WIN32) |
| 479 | *output = PrintfToNewString("Error: Win32 does not support opendir."); |
| 480 | return 1; |
| 481 | #else |
| 482 | DIR* dir; |
| 483 | int dir_index; |
| 484 | const char* dirname; |
| 485 | |
| 486 | if (num_params != 1) { |
| 487 | *output = PrintfToNewString("Error: opendir takes 1 parameter."); |
| 488 | return 1; |
| 489 | } |
| 490 | |
| 491 | dirname = params[0]; |
| 492 | |
| 493 | dir = opendir(dirname); |
| 494 | if (!dir) { |
| 495 | *output = PrintfToNewString("Error: opendir returned a NULL DIR*."); |
| 496 | return 2; |
| 497 | } |
| 498 | |
| 499 | dir_index = AddDirToMap(dir); |
| 500 | if (dir_index == -1) { |
| 501 | *output = PrintfToNewString( |
| 502 | "Error: Example only allows %d open dir handles.", MAX_OPEN_DIRS); |
| 503 | return 3; |
| 504 | } |
| 505 | |
| 506 | *output = PrintfToNewString("opendir\1%s\1%d", dirname, dir_index); |
| 507 | return 0; |
| 508 | #endif |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * Handle a call to readdir() made by JavaScript. |
| 513 | * |
| 514 | * readdir expects 1 parameter: |
| 515 | * 0: The index of the directory (which is mapped to a DIR*) |
| 516 | * on success, opendir returns a result in |output| separated by \1: |
| 517 | * 0: "readdir" |
| 518 | * 1: the inode number of the entry |
| 519 | * 2: the name of the entry |
| 520 | * on failure, readdir returns an error string in |output|. |
| 521 | * |
| 522 | * @param[in] num_params The number of params in |params|. |
| 523 | * @param[in] params An array of strings, parameters to this function. |
| 524 | * @param[out] output A string to write informational function output to. |
| 525 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 526 | int HandleReaddir(int num_params, char** params, char** output) { |
| 527 | #if defined(WIN32) |
| 528 | *output = PrintfToNewString("Error: Win32 does not support readdir."); |
| 529 | return 1; |
| 530 | #else |
| 531 | DIR* dir; |
| 532 | const char* dir_index_string; |
| 533 | struct dirent* entry; |
| 534 | |
| 535 | if (num_params != 1) { |
| 536 | *output = PrintfToNewString("Error: readdir takes 1 parameter."); |
| 537 | return 1; |
| 538 | } |
| 539 | |
| 540 | dir_index_string = params[0]; |
| 541 | dir = GetDirFromIndexString(dir_index_string, NULL); |
| 542 | |
| 543 | if (!dir) { |
| 544 | *output = PrintfToNewString("Error: Unknown dir handle %s.", |
| 545 | dir_index_string); |
| 546 | return 2; |
| 547 | } |
| 548 | |
| 549 | entry = readdir(dir); |
| 550 | if (entry != NULL) { |
| 551 | *output = PrintfToNewString("readdir\1%s\1%d\1%s", dir_index_string, |
| 552 | entry->d_ino, entry->d_name); |
| 553 | } else { |
| 554 | *output = PrintfToNewString("readdir\1%s\1\1", dir_index_string); |
| 555 | } |
| 556 | |
| 557 | return 0; |
| 558 | #endif |
| 559 | } |
| 560 | |
| 561 | /** |
| 562 | * Handle a call to closedir() made by JavaScript. |
| 563 | * |
| 564 | * closedir expects 1 parameter: |
| 565 | * 0: The index of the directory (which is mapped to a DIR*) |
| 566 | * on success, closedir returns a result in |output| separated by \1: |
| 567 | * 0: "closedir" |
| 568 | * 1: the name of the directory |
| 569 | * on failure, closedir returns an error string in |output|. |
| 570 | * |
| 571 | * @param[in] num_params The number of params in |params|. |
| 572 | * @param[in] params An array of strings, parameters to this function. |
| 573 | * @param[out] output A string to write informational function output to. |
| 574 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 575 | int HandleClosedir(int num_params, char** params, char** output) { |
| 576 | #if defined(WIN32) |
| 577 | *output = PrintfToNewString("Error: Win32 does not support closedir."); |
| 578 | return 1; |
| 579 | #else |
| 580 | DIR* dir; |
| 581 | int dir_index; |
| 582 | const char* dir_index_string; |
| 583 | int result; |
| 584 | |
| 585 | if (num_params != 1) { |
| 586 | *output = PrintfToNewString("Error: closedir takes 1 parameters."); |
| 587 | return 1; |
| 588 | } |
| 589 | |
| 590 | dir_index_string = params[0]; |
| 591 | dir = GetDirFromIndexString(dir_index_string, &dir_index); |
| 592 | if (!dir) { |
| 593 | *output = PrintfToNewString("Error: Unknown dir handle %s.", |
| 594 | dir_index_string); |
| 595 | return 2; |
| 596 | } |
| 597 | |
| 598 | result = closedir(dir); |
| 599 | if (result) { |
| 600 | *output = PrintfToNewString("Error: closedir returned error %d.", result); |
| 601 | return 3; |
| 602 | } |
| 603 | |
| 604 | RemoveDirFromMap(dir_index); |
| 605 | |
| 606 | *output = PrintfToNewString("closedir\1%s", dir_index_string); |
| 607 | return 0; |
| 608 | #endif |
| 609 | } |
| 610 | |
| 611 | /** |
| 612 | * Handle a call to mkdir() made by JavaScript. |
| 613 | * |
| 614 | * mkdir expects 1 parameter: |
| 615 | * 0: The name of the directory |
| 616 | * 1: The mode to use for the new directory, in octal. |
| 617 | * on success, mkdir returns a result in |output| separated by \1: |
| 618 | * 0: "mkdir" |
| 619 | * 1: the name of the directory |
| 620 | * on failure, mkdir returns an error string in |output|. |
| 621 | * |
| 622 | * @param[in] num_params The number of params in |params|. |
| 623 | * @param[in] params An array of strings, parameters to this function. |
| 624 | * @param[out] output A string to write informational function output to. |
| 625 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 626 | int HandleMkdir(int num_params, char** params, char** output) { |
| 627 | const char* dirname; |
| 628 | int result; |
| 629 | int mode; |
| 630 | |
| 631 | if (num_params != 2) { |
| 632 | *output = PrintfToNewString("Error: mkdir takes 2 parameters."); |
| 633 | return 1; |
| 634 | } |
| 635 | |
| 636 | dirname = params[0]; |
| 637 | mode = strtol(params[1], NULL, 8); |
| 638 | |
| 639 | result = mkdir(dirname, mode); |
| 640 | if (result != 0) { |
| 641 | *output = PrintfToNewString("Error: mkdir returned error: %d", errno); |
| 642 | return 2; |
| 643 | } |
| 644 | |
| 645 | *output = PrintfToNewString("mkdir\1%s", dirname); |
| 646 | return 0; |
| 647 | } |
Ben Murdoch | bb1529c | 2013-08-08 10:24:53 +0100 | [diff] [blame^] | 648 | |
| 649 | /** |
| 650 | * Handle a call to gethostbyname() made by JavaScript. |
| 651 | * |
| 652 | * gethostbyname expects 1 parameter: |
| 653 | * 0: The name of the host to look up. |
| 654 | * on success, gethostbyname returns a result in |output| separated by \1: |
| 655 | * 0: "gethostbyname" |
| 656 | * 1: Host name |
| 657 | * 2: Address type (either "AF_INET" or "AF_INET6") |
| 658 | * 3. The first address. |
| 659 | * 4+ The second, third, etc. addresses. |
| 660 | * on failure, gethostbyname returns an error string in |output|. |
| 661 | * |
| 662 | * @param[in] num_params The number of params in |params|. |
| 663 | * @param[in] params An array of strings, parameters to this function. |
| 664 | * @param[out] output A string to write informational function output to. |
| 665 | * @return An errorcode; 0 means success, anything else is a failure. */ |
| 666 | int HandleGethostbyname(int num_params, char** params, char** output) { |
| 667 | struct hostent* info; |
| 668 | struct in_addr **addr_list; |
| 669 | const char* addr_type; |
| 670 | const char* name; |
| 671 | char inet6_addr_str[INET6_ADDRSTRLEN]; |
| 672 | int non_variable_len, output_len; |
| 673 | int current_pos; |
| 674 | int i; |
| 675 | |
| 676 | if (num_params != 1) { |
| 677 | *output = PrintfToNewString("Error: gethostbyname takes 1 parameter."); |
| 678 | return 1; |
| 679 | } |
| 680 | |
| 681 | name = params[0]; |
| 682 | |
| 683 | info = gethostbyname(name); |
| 684 | if (!info) { |
| 685 | *output = PrintfToNewString("Error: gethostbyname failed, error is \"%s\"", |
| 686 | hstrerror(h_errno)); |
| 687 | return 2; |
| 688 | } |
| 689 | |
| 690 | addr_type = info->h_addrtype == AF_INET ? "AF_INET" : "AF_INET6"; |
| 691 | |
| 692 | non_variable_len = strlen("gethostbyname") + 1 |
| 693 | + strlen(info->h_name) + 1 + strlen(addr_type); |
| 694 | output_len = non_variable_len; |
| 695 | |
| 696 | addr_list = (struct in_addr **)info->h_addr_list; |
| 697 | for (i = 0; addr_list[i] != NULL; i++) { |
| 698 | output_len += 1; // for the divider |
| 699 | if (info->h_addrtype == AF_INET) { |
| 700 | output_len += strlen(inet_ntoa(*addr_list[i])); |
| 701 | } else { // IPv6 |
| 702 | inet_ntop(AF_INET6, addr_list[i], inet6_addr_str, INET6_ADDRSTRLEN); |
| 703 | output_len += strlen(inet6_addr_str); |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | *output = (char*) calloc(output_len + 1, 1); |
| 708 | if (!*output) { |
| 709 | *output = PrintfToNewString("Error: out of memory."); |
| 710 | return 3; |
| 711 | } |
| 712 | snprintf(*output, non_variable_len + 1, "gethostbyname\1%s\1%s", |
| 713 | info->h_name, addr_type); |
| 714 | |
| 715 | current_pos = non_variable_len; |
| 716 | for (i = 0; addr_list[i] != NULL; i++) { |
| 717 | if (info->h_addrtype == AF_INET) { |
| 718 | current_pos += sprintf(*output + current_pos, |
| 719 | "\1%s", inet_ntoa(*addr_list[i])); |
| 720 | } else { // IPv6 |
| 721 | inet_ntop(AF_INET6, addr_list[i], inet6_addr_str, INET6_ADDRSTRLEN); |
| 722 | sprintf(*output + current_pos, "\1%s", inet6_addr_str); |
| 723 | } |
| 724 | } |
| 725 | return 0; |
| 726 | } |