Emeric Vigier | 2f62582 | 2012-08-06 11:09:52 -0400 | [diff] [blame] | 1 | /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ |
| 2 | /* desktop-file.c .desktop file parser |
| 3 | * |
| 4 | * Copyright (C) 2003 CodeFactory AB |
| 5 | * Copyright (C) 2003 Red Hat Inc. |
| 6 | * |
| 7 | * Licensed under the Academic Free License version 2.1 |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <config.h> |
| 26 | #include <dbus/dbus-sysdeps.h> |
| 27 | #include <dbus/dbus-internals.h> |
| 28 | #include "desktop-file.h" |
| 29 | #include "utils.h" |
| 30 | |
| 31 | typedef struct |
| 32 | { |
| 33 | char *key; |
| 34 | char *value; |
| 35 | } BusDesktopFileLine; |
| 36 | |
| 37 | typedef struct |
| 38 | { |
| 39 | char *section_name; |
| 40 | |
| 41 | int n_lines; |
| 42 | BusDesktopFileLine *lines; |
| 43 | int n_allocated_lines; |
| 44 | } BusDesktopFileSection; |
| 45 | |
| 46 | struct BusDesktopFile |
| 47 | { |
| 48 | int n_sections; |
| 49 | BusDesktopFileSection *sections; |
| 50 | int n_allocated_sections; |
| 51 | }; |
| 52 | |
| 53 | /** |
| 54 | * Parser for service files. |
| 55 | */ |
| 56 | typedef struct |
| 57 | { |
| 58 | DBusString data; /**< The data from the file */ |
| 59 | |
| 60 | BusDesktopFile *desktop_file; /**< The resulting object */ |
| 61 | int current_section; /**< The current section being parsed */ |
| 62 | |
| 63 | int pos; /**< Current position */ |
| 64 | int len; /**< Length */ |
| 65 | int line_num; /**< Current line number */ |
| 66 | |
| 67 | } BusDesktopFileParser; |
| 68 | |
| 69 | #define VALID_KEY_CHAR 1 |
| 70 | #define VALID_LOCALE_CHAR 2 |
| 71 | static unsigned char valid[256] = { |
| 72 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 73 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 74 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x3 , 0x2 , 0x0 , |
| 75 | 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 76 | 0x0 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , |
| 77 | 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x0 , 0x0 , 0x0 , 0x0 , 0x2 , |
| 78 | 0x0 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , |
| 79 | 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x3 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 80 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 81 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 82 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 83 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 84 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 85 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 86 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 87 | 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , 0x0 , |
| 88 | }; |
| 89 | |
| 90 | static void report_error (BusDesktopFileParser *parser, |
| 91 | char *message, |
| 92 | const char *error_name, |
| 93 | DBusError *error); |
| 94 | |
| 95 | static void |
| 96 | parser_free (BusDesktopFileParser *parser) |
| 97 | { |
| 98 | bus_desktop_file_free (parser->desktop_file); |
| 99 | |
| 100 | _dbus_string_free (&parser->data); |
| 101 | } |
| 102 | |
| 103 | static void |
| 104 | bus_desktop_file_line_free (BusDesktopFileLine *line) |
| 105 | { |
| 106 | dbus_free (line->key); |
| 107 | dbus_free (line->value); |
| 108 | } |
| 109 | |
| 110 | static void |
| 111 | bus_desktop_file_section_free (BusDesktopFileSection *section) |
| 112 | { |
| 113 | int i; |
| 114 | |
| 115 | for (i = 0; i < section->n_lines; i++) |
| 116 | bus_desktop_file_line_free (§ion->lines[i]); |
| 117 | |
| 118 | dbus_free (section->lines); |
| 119 | dbus_free (section->section_name); |
| 120 | } |
| 121 | |
| 122 | void |
| 123 | bus_desktop_file_free (BusDesktopFile *desktop_file) |
| 124 | { |
| 125 | int i; |
| 126 | |
| 127 | for (i = 0; i < desktop_file->n_sections; i++) |
| 128 | bus_desktop_file_section_free (&desktop_file->sections[i]); |
| 129 | dbus_free (desktop_file->sections); |
| 130 | |
| 131 | dbus_free (desktop_file); |
| 132 | } |
| 133 | |
| 134 | static dbus_bool_t |
| 135 | grow_lines_in_section (BusDesktopFileSection *section) |
| 136 | { |
| 137 | BusDesktopFileLine *lines; |
| 138 | |
| 139 | int new_n_lines; |
| 140 | |
| 141 | if (section->n_allocated_lines == 0) |
| 142 | new_n_lines = 1; |
| 143 | else |
| 144 | new_n_lines = section->n_allocated_lines*2; |
| 145 | |
| 146 | lines = dbus_realloc (section->lines, |
| 147 | sizeof (BusDesktopFileLine) * new_n_lines); |
| 148 | |
| 149 | if (lines == NULL) |
| 150 | return FALSE; |
| 151 | |
| 152 | section->lines = lines; |
| 153 | section->n_allocated_lines = new_n_lines; |
| 154 | |
| 155 | return TRUE; |
| 156 | } |
| 157 | |
| 158 | static dbus_bool_t |
| 159 | grow_sections (BusDesktopFile *desktop_file) |
| 160 | { |
| 161 | int new_n_sections; |
| 162 | BusDesktopFileSection *sections; |
| 163 | |
| 164 | if (desktop_file->n_allocated_sections == 0) |
| 165 | new_n_sections = 1; |
| 166 | else |
| 167 | new_n_sections = desktop_file->n_allocated_sections*2; |
| 168 | |
| 169 | sections = dbus_realloc (desktop_file->sections, |
| 170 | sizeof (BusDesktopFileSection) * new_n_sections); |
| 171 | if (sections == NULL) |
| 172 | return FALSE; |
| 173 | |
| 174 | desktop_file->sections = sections; |
| 175 | |
| 176 | desktop_file->n_allocated_sections = new_n_sections; |
| 177 | |
| 178 | return TRUE; |
| 179 | } |
| 180 | |
| 181 | static char * |
| 182 | unescape_string (BusDesktopFileParser *parser, |
| 183 | const DBusString *str, |
| 184 | int pos, |
| 185 | int end_pos, |
| 186 | DBusError *error) |
| 187 | { |
| 188 | char *retval, *q; |
| 189 | |
| 190 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 191 | |
| 192 | /* len + 1 is enough, because unescaping never makes the |
| 193 | * string longer |
| 194 | */ |
| 195 | retval = dbus_malloc (end_pos - pos + 1); |
| 196 | if (retval == NULL) |
| 197 | { |
| 198 | BUS_SET_OOM (error); |
| 199 | return NULL; |
| 200 | } |
| 201 | |
| 202 | q = retval; |
| 203 | |
| 204 | while (pos < end_pos) |
| 205 | { |
| 206 | if (_dbus_string_get_byte (str, pos) == 0) |
| 207 | { |
| 208 | /* Found an embedded null */ |
| 209 | dbus_free (retval); |
| 210 | report_error (parser, "Text to be unescaped contains embedded nul", |
| 211 | BUS_DESKTOP_PARSE_ERROR_INVALID_ESCAPES, error); |
| 212 | return NULL; |
| 213 | } |
| 214 | |
| 215 | if (_dbus_string_get_byte (str, pos) == '\\') |
| 216 | { |
| 217 | pos ++; |
| 218 | |
| 219 | if (pos >= end_pos) |
| 220 | { |
| 221 | /* Escape at end of string */ |
| 222 | dbus_free (retval); |
| 223 | report_error (parser, "Text to be unescaped ended in \\", |
| 224 | BUS_DESKTOP_PARSE_ERROR_INVALID_ESCAPES, error); |
| 225 | return NULL; |
| 226 | } |
| 227 | |
| 228 | switch (_dbus_string_get_byte (str, pos)) |
| 229 | { |
| 230 | case 's': |
| 231 | *q++ = ' '; |
| 232 | break; |
| 233 | case 't': |
| 234 | *q++ = '\t'; |
| 235 | break; |
| 236 | case 'n': |
| 237 | *q++ = '\n'; |
| 238 | break; |
| 239 | case 'r': |
| 240 | *q++ = '\r'; |
| 241 | break; |
| 242 | case '\\': |
| 243 | *q++ = '\\'; |
| 244 | break; |
| 245 | default: |
| 246 | /* Invalid escape code */ |
| 247 | dbus_free (retval); |
| 248 | report_error (parser, "Text to be unescaped had invalid escape sequence", |
| 249 | BUS_DESKTOP_PARSE_ERROR_INVALID_ESCAPES, error); |
| 250 | return NULL; |
| 251 | } |
| 252 | pos++; |
| 253 | } |
| 254 | else |
| 255 | { |
| 256 | *q++ =_dbus_string_get_byte (str, pos); |
| 257 | |
| 258 | pos++; |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | *q = 0; |
| 263 | |
| 264 | return retval; |
| 265 | } |
| 266 | |
| 267 | static BusDesktopFileSection* |
| 268 | new_section (BusDesktopFile *desktop_file, |
| 269 | const char *name) |
| 270 | { |
| 271 | int n; |
| 272 | char *name_copy; |
| 273 | |
| 274 | if (desktop_file->n_allocated_sections == desktop_file->n_sections) |
| 275 | { |
| 276 | if (!grow_sections (desktop_file)) |
| 277 | return NULL; |
| 278 | } |
| 279 | |
| 280 | name_copy = _dbus_strdup (name); |
| 281 | if (name_copy == NULL) |
| 282 | return NULL; |
| 283 | |
| 284 | n = desktop_file->n_sections; |
| 285 | desktop_file->sections[n].section_name = name_copy; |
| 286 | |
| 287 | desktop_file->sections[n].n_lines = 0; |
| 288 | desktop_file->sections[n].lines = NULL; |
| 289 | desktop_file->sections[n].n_allocated_lines = 0; |
| 290 | |
| 291 | if (!grow_lines_in_section (&desktop_file->sections[n])) |
| 292 | { |
| 293 | dbus_free (desktop_file->sections[n].section_name); |
| 294 | desktop_file->sections[n].section_name = NULL; |
| 295 | return NULL; |
| 296 | } |
| 297 | |
| 298 | desktop_file->n_sections += 1; |
| 299 | |
| 300 | return &desktop_file->sections[n]; |
| 301 | } |
| 302 | |
| 303 | static BusDesktopFileSection* |
| 304 | open_section (BusDesktopFileParser *parser, |
| 305 | char *name) |
| 306 | { |
| 307 | BusDesktopFileSection *section; |
| 308 | |
| 309 | section = new_section (parser->desktop_file, name); |
| 310 | if (section == NULL) |
| 311 | return NULL; |
| 312 | |
| 313 | parser->current_section = parser->desktop_file->n_sections - 1; |
| 314 | _dbus_assert (&parser->desktop_file->sections[parser->current_section] == section); |
| 315 | |
| 316 | return section; |
| 317 | } |
| 318 | |
| 319 | static BusDesktopFileLine * |
| 320 | new_line (BusDesktopFileParser *parser) |
| 321 | { |
| 322 | BusDesktopFileSection *section; |
| 323 | BusDesktopFileLine *line; |
| 324 | |
| 325 | section = &parser->desktop_file->sections[parser->current_section]; |
| 326 | |
| 327 | if (section->n_allocated_lines == section->n_lines) |
| 328 | { |
| 329 | if (!grow_lines_in_section (section)) |
| 330 | return NULL; |
| 331 | } |
| 332 | |
| 333 | line = §ion->lines[section->n_lines++]; |
| 334 | |
| 335 | _DBUS_ZERO(*line); |
| 336 | |
| 337 | return line; |
| 338 | } |
| 339 | |
| 340 | static dbus_bool_t |
| 341 | is_blank_line (BusDesktopFileParser *parser) |
| 342 | { |
| 343 | int p; |
| 344 | char c; |
| 345 | |
| 346 | p = parser->pos; |
| 347 | |
| 348 | c = _dbus_string_get_byte (&parser->data, p); |
| 349 | |
| 350 | while (c && c != '\n') |
| 351 | { |
| 352 | if (!(c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f')) |
| 353 | return FALSE; |
| 354 | |
| 355 | p++; |
| 356 | c = _dbus_string_get_byte (&parser->data, p); |
| 357 | } |
| 358 | |
| 359 | return TRUE; |
| 360 | } |
| 361 | |
| 362 | static void |
| 363 | parse_comment_or_blank (BusDesktopFileParser *parser) |
| 364 | { |
| 365 | int line_end, eol_len; |
| 366 | |
| 367 | if (!_dbus_string_find_eol (&parser->data, parser->pos, &line_end, &eol_len)) |
| 368 | line_end = parser->len; |
| 369 | |
| 370 | if (line_end == parser->len) |
| 371 | parser->pos = parser->len; |
| 372 | else |
| 373 | parser->pos = line_end + eol_len; |
| 374 | |
| 375 | parser->line_num += 1; |
| 376 | } |
| 377 | |
| 378 | static dbus_bool_t |
| 379 | is_valid_section_name (const char *name) |
| 380 | { |
| 381 | /* 5. Group names may contain all ASCII characters except for control characters and '[' and ']'. */ |
| 382 | |
| 383 | while (*name) |
| 384 | { |
| 385 | if (!((*name >= 'A' && *name <= 'Z') || (*name >= 'a' || *name <= 'z') || |
| 386 | *name == '\n' || *name == '\t')) |
| 387 | return FALSE; |
| 388 | |
| 389 | name++; |
| 390 | } |
| 391 | |
| 392 | return TRUE; |
| 393 | } |
| 394 | |
| 395 | static dbus_bool_t |
| 396 | parse_section_start (BusDesktopFileParser *parser, DBusError *error) |
| 397 | { |
| 398 | int line_end, eol_len; |
| 399 | char *section_name; |
| 400 | |
| 401 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 402 | |
| 403 | if (!_dbus_string_find_eol (&parser->data, parser->pos, &line_end, &eol_len)) |
| 404 | line_end = parser->len; |
| 405 | |
| 406 | if (line_end - parser->pos <= 2 || |
| 407 | _dbus_string_get_byte (&parser->data, line_end - 1) != ']') |
| 408 | { |
| 409 | report_error (parser, "Invalid syntax for section header", BUS_DESKTOP_PARSE_ERROR_INVALID_SYNTAX, error); |
| 410 | parser_free (parser); |
| 411 | return FALSE; |
| 412 | } |
| 413 | |
| 414 | section_name = unescape_string (parser, |
| 415 | &parser->data, parser->pos + 1, line_end - 1, |
| 416 | error); |
| 417 | |
| 418 | if (section_name == NULL) |
| 419 | { |
| 420 | parser_free (parser); |
| 421 | return FALSE; |
| 422 | } |
| 423 | |
| 424 | if (!is_valid_section_name (section_name)) |
| 425 | { |
| 426 | report_error (parser, "Invalid characters in section name", BUS_DESKTOP_PARSE_ERROR_INVALID_CHARS, error); |
| 427 | parser_free (parser); |
| 428 | dbus_free (section_name); |
| 429 | return FALSE; |
| 430 | } |
| 431 | |
| 432 | if (open_section (parser, section_name) == NULL) |
| 433 | { |
| 434 | dbus_free (section_name); |
| 435 | parser_free (parser); |
| 436 | BUS_SET_OOM (error); |
| 437 | return FALSE; |
| 438 | } |
| 439 | |
| 440 | if (line_end == parser->len) |
| 441 | parser->pos = parser->len; |
| 442 | else |
| 443 | parser->pos = line_end + eol_len; |
| 444 | |
| 445 | parser->line_num += 1; |
| 446 | |
| 447 | dbus_free (section_name); |
| 448 | |
| 449 | return TRUE; |
| 450 | } |
| 451 | |
| 452 | static dbus_bool_t |
| 453 | parse_key_value (BusDesktopFileParser *parser, DBusError *error) |
| 454 | { |
| 455 | int line_end, eol_len; |
| 456 | int key_start, key_end; |
| 457 | int value_start; |
| 458 | int p; |
| 459 | char *value, *tmp; |
| 460 | DBusString key; |
| 461 | BusDesktopFileLine *line; |
| 462 | |
| 463 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 464 | |
| 465 | if (!_dbus_string_find_eol (&parser->data, parser->pos, &line_end, &eol_len)) |
| 466 | line_end = parser->len; |
| 467 | |
| 468 | p = parser->pos; |
| 469 | key_start = p; |
| 470 | while (p < line_end && |
| 471 | (valid[_dbus_string_get_byte (&parser->data, p)] & VALID_KEY_CHAR)) |
| 472 | p++; |
| 473 | key_end = p; |
| 474 | |
| 475 | if (key_start == key_end) |
| 476 | { |
| 477 | report_error (parser, "Empty key name", BUS_DESKTOP_PARSE_ERROR_INVALID_SYNTAX, error); |
| 478 | parser_free (parser); |
| 479 | return FALSE; |
| 480 | } |
| 481 | |
| 482 | /* We ignore locales for now */ |
| 483 | if (p < line_end && _dbus_string_get_byte (&parser->data, p) == '[') |
| 484 | { |
| 485 | if (line_end == parser->len) |
| 486 | parser->pos = parser->len; |
| 487 | else |
| 488 | parser->pos = line_end + eol_len; |
| 489 | |
| 490 | parser->line_num += 1; |
| 491 | |
| 492 | return TRUE; |
| 493 | } |
| 494 | |
| 495 | /* Skip space before '=' */ |
| 496 | while (p < line_end && _dbus_string_get_byte (&parser->data, p) == ' ') |
| 497 | p++; |
| 498 | |
| 499 | if (p < line_end && _dbus_string_get_byte (&parser->data, p) != '=') |
| 500 | { |
| 501 | report_error (parser, "Invalid characters in key name", BUS_DESKTOP_PARSE_ERROR_INVALID_CHARS, error); |
| 502 | parser_free (parser); |
| 503 | return FALSE; |
| 504 | } |
| 505 | |
| 506 | if (p == line_end) |
| 507 | { |
| 508 | report_error (parser, "No '=' in key/value pair", BUS_DESKTOP_PARSE_ERROR_INVALID_SYNTAX, error); |
| 509 | parser_free (parser); |
| 510 | return FALSE; |
| 511 | } |
| 512 | |
| 513 | /* Skip the '=' */ |
| 514 | p++; |
| 515 | |
| 516 | /* Skip space after '=' */ |
| 517 | while (p < line_end && _dbus_string_get_byte (&parser->data, p) == ' ') |
| 518 | p++; |
| 519 | |
| 520 | value_start = p; |
| 521 | |
| 522 | value = unescape_string (parser, &parser->data, value_start, line_end, error); |
| 523 | if (value == NULL) |
| 524 | { |
| 525 | parser_free (parser); |
| 526 | return FALSE; |
| 527 | } |
| 528 | |
| 529 | line = new_line (parser); |
| 530 | if (line == NULL) |
| 531 | { |
| 532 | dbus_free (value); |
| 533 | parser_free (parser); |
| 534 | BUS_SET_OOM (error); |
| 535 | return FALSE; |
| 536 | } |
| 537 | |
| 538 | if (!_dbus_string_init (&key)) |
| 539 | { |
| 540 | dbus_free (value); |
| 541 | parser_free (parser); |
| 542 | BUS_SET_OOM (error); |
| 543 | return FALSE; |
| 544 | } |
| 545 | |
| 546 | if (!_dbus_string_copy_len (&parser->data, key_start, key_end - key_start, |
| 547 | &key, 0)) |
| 548 | { |
| 549 | _dbus_string_free (&key); |
| 550 | dbus_free (value); |
| 551 | parser_free (parser); |
| 552 | BUS_SET_OOM (error); |
| 553 | return FALSE; |
| 554 | } |
| 555 | |
| 556 | if (!_dbus_string_steal_data (&key, &tmp)) |
| 557 | { |
| 558 | _dbus_string_free (&key); |
| 559 | dbus_free (value); |
| 560 | parser_free (parser); |
| 561 | BUS_SET_OOM (error); |
| 562 | return FALSE; |
| 563 | } |
| 564 | |
| 565 | _dbus_string_free (&key); |
| 566 | |
| 567 | line->key = tmp; |
| 568 | line->value = value; |
| 569 | |
| 570 | if (line_end == parser->len) |
| 571 | parser->pos = parser->len; |
| 572 | else |
| 573 | parser->pos = line_end + eol_len; |
| 574 | |
| 575 | parser->line_num += 1; |
| 576 | |
| 577 | return TRUE; |
| 578 | } |
| 579 | |
| 580 | static void |
| 581 | report_error (BusDesktopFileParser *parser, |
| 582 | char *message, |
| 583 | const char *error_name, |
| 584 | DBusError *error) |
| 585 | { |
| 586 | const char *section_name = NULL; |
| 587 | |
| 588 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 589 | |
| 590 | if (parser->current_section != -1) |
| 591 | section_name = parser->desktop_file->sections[parser->current_section].section_name; |
| 592 | |
| 593 | if (section_name) |
| 594 | dbus_set_error (error, error_name, |
| 595 | "Error in section %s at line %d: %s\n", section_name, parser->line_num, message); |
| 596 | else |
| 597 | dbus_set_error (error, error_name, |
| 598 | "Error at line %d: %s\n", parser->line_num, message); |
| 599 | } |
| 600 | |
| 601 | #if 0 |
| 602 | static void |
| 603 | dump_desktop_file (BusDesktopFile *file) |
| 604 | { |
| 605 | int i; |
| 606 | |
| 607 | for (i = 0; i < file->n_sections; i++) |
| 608 | { |
| 609 | int j; |
| 610 | |
| 611 | printf ("[%s]\n", file->sections[i].section_name); |
| 612 | |
| 613 | for (j = 0; j < file->sections[i].n_lines; j++) |
| 614 | { |
| 615 | printf ("%s=%s\n", file->sections[i].lines[j].key, |
| 616 | file->sections[i].lines[j].value); |
| 617 | } |
| 618 | } |
| 619 | } |
| 620 | #endif |
| 621 | |
| 622 | BusDesktopFile* |
| 623 | bus_desktop_file_load (DBusString *filename, |
| 624 | DBusError *error) |
| 625 | { |
| 626 | DBusString str; |
| 627 | BusDesktopFileParser parser; |
| 628 | DBusStat sb; |
| 629 | |
| 630 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 631 | |
| 632 | /* Clearly there's a race here, but it's just to make it unlikely |
| 633 | * that we do something silly, we still handle doing it below. |
| 634 | */ |
| 635 | if (!_dbus_stat (filename, &sb, error)) |
| 636 | return NULL; |
| 637 | |
| 638 | if (sb.size > _DBUS_ONE_KILOBYTE * 128) |
| 639 | { |
| 640 | dbus_set_error (error, DBUS_ERROR_FAILED, |
| 641 | "Desktop file size (%ld bytes) is too large", (long) sb.size); |
| 642 | return NULL; |
| 643 | } |
| 644 | |
| 645 | if (!_dbus_string_init (&str)) |
| 646 | { |
| 647 | BUS_SET_OOM (error); |
| 648 | return NULL; |
| 649 | } |
| 650 | |
| 651 | if (!_dbus_file_get_contents (&str, filename, error)) |
| 652 | { |
| 653 | _dbus_string_free (&str); |
| 654 | return NULL; |
| 655 | } |
| 656 | |
| 657 | if (!_dbus_string_validate_utf8 (&str, 0, _dbus_string_get_length (&str))) |
| 658 | { |
| 659 | _dbus_string_free (&str); |
| 660 | dbus_set_error (error, DBUS_ERROR_FAILED, |
| 661 | "invalid UTF-8"); |
| 662 | return NULL; |
| 663 | } |
| 664 | |
| 665 | parser.desktop_file = dbus_new0 (BusDesktopFile, 1); |
| 666 | if (parser.desktop_file == NULL) |
| 667 | { |
| 668 | _dbus_string_free (&str); |
| 669 | BUS_SET_OOM (error); |
| 670 | return NULL; |
| 671 | } |
| 672 | |
| 673 | parser.data = str; |
| 674 | parser.line_num = 1; |
| 675 | parser.pos = 0; |
| 676 | parser.len = _dbus_string_get_length (&parser.data); |
| 677 | parser.current_section = -1; |
| 678 | |
| 679 | while (parser.pos < parser.len) |
| 680 | { |
| 681 | if (_dbus_string_get_byte (&parser.data, parser.pos) == '[') |
| 682 | { |
| 683 | if (!parse_section_start (&parser, error)) |
| 684 | { |
| 685 | return NULL; |
| 686 | } |
| 687 | } |
| 688 | else if (is_blank_line (&parser) || |
| 689 | _dbus_string_get_byte (&parser.data, parser.pos) == '#') |
| 690 | parse_comment_or_blank (&parser); |
| 691 | else |
| 692 | { |
| 693 | if (!parse_key_value (&parser, error)) |
| 694 | { |
| 695 | return NULL; |
| 696 | } |
| 697 | } |
| 698 | } |
| 699 | |
| 700 | _dbus_string_free (&parser.data); |
| 701 | |
| 702 | return parser.desktop_file; |
| 703 | } |
| 704 | |
| 705 | static BusDesktopFileSection * |
| 706 | lookup_section (BusDesktopFile *desktop_file, |
| 707 | const char *section_name) |
| 708 | { |
| 709 | BusDesktopFileSection *section; |
| 710 | int i; |
| 711 | |
| 712 | if (section_name == NULL) |
| 713 | return NULL; |
| 714 | |
| 715 | for (i = 0; i < desktop_file->n_sections; i ++) |
| 716 | { |
| 717 | section = &desktop_file->sections[i]; |
| 718 | |
| 719 | if (strcmp (section->section_name, section_name) == 0) |
| 720 | return section; |
| 721 | } |
| 722 | |
| 723 | return NULL; |
| 724 | } |
| 725 | |
| 726 | static BusDesktopFileLine * |
| 727 | lookup_line (BusDesktopFile *desktop_file, |
| 728 | BusDesktopFileSection *section, |
| 729 | const char *keyname) |
| 730 | { |
| 731 | BusDesktopFileLine *line; |
| 732 | int i; |
| 733 | |
| 734 | for (i = 0; i < section->n_lines; i++) |
| 735 | { |
| 736 | line = §ion->lines[i]; |
| 737 | |
| 738 | if (strcmp (line->key, keyname) == 0) |
| 739 | return line; |
| 740 | } |
| 741 | |
| 742 | return NULL; |
| 743 | } |
| 744 | |
| 745 | dbus_bool_t |
| 746 | bus_desktop_file_get_raw (BusDesktopFile *desktop_file, |
| 747 | const char *section_name, |
| 748 | const char *keyname, |
| 749 | const char **val) |
| 750 | { |
| 751 | BusDesktopFileSection *section; |
| 752 | BusDesktopFileLine *line; |
| 753 | |
| 754 | *val = NULL; |
| 755 | |
| 756 | section = lookup_section (desktop_file, section_name); |
| 757 | |
| 758 | if (!section) |
| 759 | return FALSE; |
| 760 | |
| 761 | line = lookup_line (desktop_file, |
| 762 | section, |
| 763 | keyname); |
| 764 | |
| 765 | if (!line) |
| 766 | return FALSE; |
| 767 | |
| 768 | *val = line->value; |
| 769 | |
| 770 | return TRUE; |
| 771 | } |
| 772 | |
| 773 | dbus_bool_t |
| 774 | bus_desktop_file_get_string (BusDesktopFile *desktop_file, |
| 775 | const char *section, |
| 776 | const char *keyname, |
| 777 | char **val, |
| 778 | DBusError *error) |
| 779 | { |
| 780 | const char *raw; |
| 781 | |
| 782 | _DBUS_ASSERT_ERROR_IS_CLEAR (error); |
| 783 | |
| 784 | *val = NULL; |
| 785 | |
| 786 | if (!bus_desktop_file_get_raw (desktop_file, section, keyname, &raw)) |
| 787 | { |
| 788 | dbus_set_error (error, DBUS_ERROR_FAILED, |
| 789 | "No \"%s\" key in .service file\n", keyname); |
| 790 | return FALSE; |
| 791 | } |
| 792 | |
| 793 | *val = _dbus_strdup (raw); |
| 794 | |
| 795 | if (*val == NULL) |
| 796 | { |
| 797 | BUS_SET_OOM (error); |
| 798 | return FALSE; |
| 799 | } |
| 800 | |
| 801 | return TRUE; |
| 802 | } |