src/locale/keymap-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2
   3 #include <errno.h>
   4 #include <sys/stat.h>
   5 #include <sys/types.h>
   6 #include <unistd.h>
   7
   8 #include "bus-polkit.h"
   9 #include "env-file-label.h"
  10 #include "env-file.h"
  11 #include "env-util.h"
  12 #include "fd-util.h"
  13 #include "fileio-label.h"
  14 #include "fileio.h"
  15 #include "kbd-util.h"
  16 #include "keymap-util.h"
  17 #include "locale-util.h"
  18 #include "macro.h"
  19 #include "mkdir.h"
  20 #include "nulstr-util.h"
  21 #include "string-util.h"
  22 #include "strv.h"
  23 #include "tmpfile-util.h"
  24
  25 static bool startswith_comma(const char *s, const char *prefix) {
  26         s = startswith(s, prefix);
  27         if (!s)
  28                 return false;
  29
  30         return IN_SET(*s, ',', '\0');
  31 }
  32
  33 static const char* systemd_kbd_model_map(void) {
  34         const char* s;
  35
  36         s = getenv("SYSTEMD_KBD_MODEL_MAP");
  37         if (s)
  38                 return s;
  39
  40         return SYSTEMD_KBD_MODEL_MAP;
  41 }
  42
  43 static const char* systemd_language_fallback_map(void) {
  44         const char* s;
  45
  46         s = getenv("SYSTEMD_LANGUAGE_FALLBACK_MAP");
  47         if (s)
  48                 return s;
  49
  50         return SYSTEMD_LANGUAGE_FALLBACK_MAP;
  51 }
  52
  53 static void context_free_x11(Context *c) {
  54         c->x11_layout = mfree(c->x11_layout);
  55         c->x11_options = mfree(c->x11_options);
  56         c->x11_model = mfree(c->x11_model);
  57         c->x11_variant = mfree(c->x11_variant);
  58 }
  59
  60 static void context_free_vconsole(Context *c) {
  61         c->vc_keymap = mfree(c->vc_keymap);
  62         c->vc_keymap_toggle = mfree(c->vc_keymap_toggle);
  63 }
  64
  65 static void context_free_locale(Context *c) {
  66         int p;
  67
  68         for (p = 0; p < _VARIABLE_LC_MAX; p++)
  69                 c->locale[p] = mfree(c->locale[p]);
  70 }
  71
  72 void context_clear(Context *c) {
  73         context_free_locale(c);
  74         context_free_x11(c);
  75         context_free_vconsole(c);
  76
  77         sd_bus_message_unref(c->locale_cache);
  78         sd_bus_message_unref(c->x11_cache);
  79         sd_bus_message_unref(c->vc_cache);
  80
  81         bus_verify_polkit_async_registry_free(c->polkit_registry);
  82 };
  83
  84 void locale_simplify(char *locale[_VARIABLE_LC_MAX]) {
  85         int p;
  86
  87         for (p = VARIABLE_LANG+1; p < _VARIABLE_LC_MAX; p++)
  88                 if (isempty(locale[p]) || streq_ptr(locale[VARIABLE_LANG], locale[p]))
  89                         locale[p] = mfree(locale[p]);
  90 }
  91
  92 int locale_read_data(Context *c, sd_bus_message *m) {
  93         struct stat st;
  94         int r;
  95
  96         /* Do not try to re-read the file within single bus operation. */
  97         if (m) {
  98                 if (m == c->locale_cache)
  99                         return 0;
 100
 101                 sd_bus_message_unref(c->locale_cache);
 102                 c->locale_cache = sd_bus_message_ref(m);
 103         }
 104
 105         r = stat("/etc/locale.conf", &st);
 106         if (r < 0 && errno != ENOENT)
 107                 return -errno;
 108
 109         if (r >= 0) {
 110                 usec_t t;
 111
 112                 /* If mtime is not changed, then we do not need to re-read the file. */
 113                 t = timespec_load(&st.st_mtim);
 114                 if (c->locale_mtime != USEC_INFINITY && t == c->locale_mtime)
 115                         return 0;
 116
 117                 c->locale_mtime = t;
 118                 context_free_locale(c);
 119
 120                 r = parse_env_file(NULL, "/etc/locale.conf",
 121                                    "LANG",              &c->locale[VARIABLE_LANG],
 122                                    "LANGUAGE",          &c->locale[VARIABLE_LANGUAGE],
 123                                    "LC_CTYPE",          &c->locale[VARIABLE_LC_CTYPE],
 124                                    "LC_NUMERIC",        &c->locale[VARIABLE_LC_NUMERIC],
 125                                    "LC_TIME",           &c->locale[VARIABLE_LC_TIME],
 126                                    "LC_COLLATE",        &c->locale[VARIABLE_LC_COLLATE],
 127                                    "LC_MONETARY",       &c->locale[VARIABLE_LC_MONETARY],
 128                                    "LC_MESSAGES",       &c->locale[VARIABLE_LC_MESSAGES],
 129                                    "LC_PAPER",          &c->locale[VARIABLE_LC_PAPER],
 130                                    "LC_NAME",           &c->locale[VARIABLE_LC_NAME],
 131                                    "LC_ADDRESS",        &c->locale[VARIABLE_LC_ADDRESS],
 132                                    "LC_TELEPHONE",      &c->locale[VARIABLE_LC_TELEPHONE],
 133                                    "LC_MEASUREMENT",    &c->locale[VARIABLE_LC_MEASUREMENT],
 134                                    "LC_IDENTIFICATION", &c->locale[VARIABLE_LC_IDENTIFICATION]);
 135                 if (r < 0)
 136                         return r;
 137         } else {
 138                 int p;
 139
 140                 c->locale_mtime = USEC_INFINITY;
 141                 context_free_locale(c);
 142
 143                 /* Fill in what we got passed from systemd. */
 144                 for (p = 0; p < _VARIABLE_LC_MAX; p++) {
 145                         const char *name;
 146
 147                         name = locale_variable_to_string(p);
 148                         assert(name);
 149
 150                         r = free_and_strdup(&c->locale[p], empty_to_null(getenv(name)));
 151                         if (r < 0)
 152                                 return r;
 153                 }
 154         }
 155
 156         locale_simplify(c->locale);
 157         return 0;
 158 }
 159
 160 int vconsole_read_data(Context *c, sd_bus_message *m) {
 161         struct stat st;
 162         usec_t t;
 163         int r;
 164
 165         /* Do not try to re-read the file within single bus operation. */
 166         if (m) {
 167                 if (m == c->vc_cache)
 168                         return 0;
 169
 170                 sd_bus_message_unref(c->vc_cache);
 171                 c->vc_cache = sd_bus_message_ref(m);
 172         }
 173
 174         if (stat("/etc/vconsole.conf", &st) < 0) {
 175                 if (errno != ENOENT)
 176                         return -errno;
 177
 178                 c->vc_mtime = USEC_INFINITY;
 179                 context_free_vconsole(c);
 180                 return 0;
 181         }
 182
 183         /* If mtime is not changed, then we do not need to re-read */
 184         t = timespec_load(&st.st_mtim);
 185         if (c->vc_mtime != USEC_INFINITY && t == c->vc_mtime)
 186                 return 0;
 187
 188         c->vc_mtime = t;
 189         context_free_vconsole(c);
 190
 191         r = parse_env_file(NULL, "/etc/vconsole.conf",
 192                            "KEYMAP",        &c->vc_keymap,
 193                            "KEYMAP_TOGGLE", &c->vc_keymap_toggle);
 194         if (r < 0)
 195                 return r;
 196
 197         return 0;
 198 }
 199
 200 int x11_read_data(Context *c, sd_bus_message *m) {
 201         _cleanup_fclose_ FILE *f = NULL;
 202         bool in_section = false;
 203         struct stat st;
 204         usec_t t;
 205         int r;
 206
 207         /* Do not try to re-read the file within single bus operation. */
 208         if (m) {
 209                 if (m == c->x11_cache)
 210                         return 0;
 211
 212                 sd_bus_message_unref(c->x11_cache);
 213                 c->x11_cache = sd_bus_message_ref(m);
 214         }
 215
 216         if (stat("/etc/X11/xorg.conf.d/00-keyboard.conf", &st) < 0) {
 217                 if (errno != ENOENT)
 218                         return -errno;
 219
 220                 c->x11_mtime = USEC_INFINITY;
 221                 context_free_x11(c);
 222                 return 0;
 223         }
 224
 225         /* If mtime is not changed, then we do not need to re-read */
 226         t = timespec_load(&st.st_mtim);
 227         if (c->x11_mtime != USEC_INFINITY && t == c->x11_mtime)
 228                 return 0;
 229
 230         c->x11_mtime = t;
 231         context_free_x11(c);
 232
 233         f = fopen("/etc/X11/xorg.conf.d/00-keyboard.conf", "re");
 234         if (!f)
 235                 return -errno;
 236
 237         for (;;) {
 238                 _cleanup_free_ char *line = NULL;
 239                 char *l;
 240
 241                 r = read_line(f, LONG_LINE_MAX, &line);
 242                 if (r < 0)
 243                         return r;
 244                 if (r == 0)
 245                         break;
 246
 247                 l = strstrip(line);
 248                 if (IN_SET(l[0], 0, '#'))
 249                         continue;
 250
 251                 if (in_section && first_word(l, "Option")) {
 252                         _cleanup_strv_free_ char **a = NULL;
 253
 254                         r = strv_split_extract(&a, l, WHITESPACE, EXTRACT_UNQUOTE);
 255                         if (r < 0)
 256                                 return r;
 257
 258                         if (strv_length(a) == 3) {
 259                                 char **p = NULL;
 260
 261                                 if (streq(a[1], "XkbLayout"))
 262                                         p = &c->x11_layout;
 263                                 else if (streq(a[1], "XkbModel"))
 264                                         p = &c->x11_model;
 265                                 else if (streq(a[1], "XkbVariant"))
 266                                         p = &c->x11_variant;
 267                                 else if (streq(a[1], "XkbOptions"))
 268                                         p = &c->x11_options;
 269
 270                                 if (p) {
 271                                         free_and_replace(*p, a[2]);
 272                                 }
 273                         }
 274
 275                 } else if (!in_section && first_word(l, "Section")) {
 276                         _cleanup_strv_free_ char **a = NULL;
 277
 278                         r = strv_split_extract(&a, l, WHITESPACE, EXTRACT_UNQUOTE);
 279                         if (r < 0)
 280                                 return -ENOMEM;
 281
 282                         if (strv_length(a) == 2 && streq(a[1], "InputClass"))
 283                                 in_section = true;
 284
 285                 } else if (in_section && first_word(l, "EndSection"))
 286                         in_section = false;
 287         }
 288
 289         return 0;
 290 }
 291
 292 int locale_write_data(Context *c, char ***settings) {
 293         _cleanup_strv_free_ char **l = NULL;
 294         struct stat st;
 295         int r, p;
 296
 297         /* Set values will be returned as strv in *settings on success. */
 298
 299         for (p = 0; p < _VARIABLE_LC_MAX; p++) {
 300                 _cleanup_free_ char *t = NULL;
 301                 char **u;
 302                 const char *name;
 303
 304                 name = locale_variable_to_string(p);
 305                 assert(name);
 306
 307                 if (isempty(c->locale[p]))
 308                         continue;
 309
 310                 if (asprintf(&t, "%s=%s", name, c->locale[p]) < 0)
 311                         return -ENOMEM;
 312
 313                 u = strv_env_set(l, t);
 314                 if (!u)
 315                         return -ENOMEM;
 316
 317                 strv_free_and_replace(l, u);
 318         }
 319
 320         if (strv_isempty(l)) {
 321                 if (unlink("/etc/locale.conf") < 0)
 322                         return errno == ENOENT ? 0 : -errno;
 323
 324                 c->locale_mtime = USEC_INFINITY;
 325                 return 0;
 326         }
 327
 328         r = write_env_file_label("/etc/locale.conf", l);
 329         if (r < 0)
 330                 return r;
 331
 332         *settings = TAKE_PTR(l);
 333
 334         if (stat("/etc/locale.conf", &st) >= 0)
 335                 c->locale_mtime = timespec_load(&st.st_mtim);
 336
 337         return 0;
 338 }
 339
 340 int vconsole_write_data(Context *c) {
 341         _cleanup_strv_free_ char **l = NULL;
 342         struct stat st;
 343         int r;
 344
 345         r = load_env_file(NULL, "/etc/vconsole.conf", &l);
 346         if (r < 0 && r != -ENOENT)
 347                 return r;
 348
 349         if (isempty(c->vc_keymap))
 350                 l = strv_env_unset(l, "KEYMAP");
 351         else {
 352                 _cleanup_free_ char *s = NULL;
 353                 char **u;
 354
 355                 s = strjoin("KEYMAP=", c->vc_keymap);
 356                 if (!s)
 357                         return -ENOMEM;
 358
 359                 u = strv_env_set(l, s);
 360                 if (!u)
 361                         return -ENOMEM;
 362
 363                 strv_free_and_replace(l, u);
 364         }
 365
 366         if (isempty(c->vc_keymap_toggle))
 367                 l = strv_env_unset(l, "KEYMAP_TOGGLE");
 368         else  {
 369                 _cleanup_free_ char *s = NULL;
 370                 char **u;
 371
 372                 s = strjoin("KEYMAP_TOGGLE=", c->vc_keymap_toggle);
 373                 if (!s)
 374                         return -ENOMEM;
 375
 376                 u = strv_env_set(l, s);
 377                 if (!u)
 378                         return -ENOMEM;
 379
 380                 strv_free_and_replace(l, u);
 381         }
 382
 383         if (strv_isempty(l)) {
 384                 if (unlink("/etc/vconsole.conf") < 0)
 385                         return errno == ENOENT ? 0 : -errno;
 386
 387                 c->vc_mtime = USEC_INFINITY;
 388                 return 0;
 389         }
 390
 391         r = write_env_file_label("/etc/vconsole.conf", l);
 392         if (r < 0)
 393                 return r;
 394
 395         if (stat("/etc/vconsole.conf", &st) >= 0)
 396                 c->vc_mtime = timespec_load(&st.st_mtim);
 397
 398         return 0;
 399 }
 400
 401 int x11_write_data(Context *c) {
 402         _cleanup_fclose_ FILE *f = NULL;
 403         _cleanup_free_ char *temp_path = NULL;
 404         struct stat st;
 405         int r;
 406
 407         if (isempty(c->x11_layout) &&
 408             isempty(c->x11_model) &&
 409             isempty(c->x11_variant) &&
 410             isempty(c->x11_options)) {
 411
 412                 if (unlink("/etc/X11/xorg.conf.d/00-keyboard.conf") < 0)
 413                         return errno == ENOENT ? 0 : -errno;
 414
 415                 c->vc_mtime = USEC_INFINITY;
 416                 return 0;
 417         }
 418
 419         (void) mkdir_p_label("/etc/X11/xorg.conf.d", 0755);
 420         r = fopen_temporary("/etc/X11/xorg.conf.d/00-keyboard.conf", &f, &temp_path);
 421         if (r < 0)
 422                 return r;
 423
 424         (void) fchmod(fileno(f), 0644);
 425
 426         fputs("# Written by systemd-localed(8), read by systemd-localed and Xorg. It's\n"
 427               "# probably wise not to edit this file manually. Use localectl(1) to\n"
 428               "# instruct systemd-localed to update it.\n"
 429               "Section \"InputClass\"\n"
 430               "        Identifier \"system-keyboard\"\n"
 431               "        MatchIsKeyboard \"on\"\n", f);
 432
 433         if (!isempty(c->x11_layout))
 434                 fprintf(f, "        Option \"XkbLayout\" \"%s\"\n", c->x11_layout);
 435
 436         if (!isempty(c->x11_model))
 437                 fprintf(f, "        Option \"XkbModel\" \"%s\"\n", c->x11_model);
 438
 439         if (!isempty(c->x11_variant))
 440                 fprintf(f, "        Option \"XkbVariant\" \"%s\"\n", c->x11_variant);
 441
 442         if (!isempty(c->x11_options))
 443                 fprintf(f, "        Option \"XkbOptions\" \"%s\"\n", c->x11_options);
 444
 445         fputs("EndSection\n", f);
 446
 447         r = fflush_sync_and_check(f);
 448         if (r < 0)
 449                 goto fail;
 450
 451         if (rename(temp_path, "/etc/X11/xorg.conf.d/00-keyboard.conf") < 0) {
 452                 r = -errno;
 453                 goto fail;
 454         }
 455
 456         if (stat("/etc/X11/xorg.conf.d/00-keyboard.conf", &st) >= 0)
 457                 c->x11_mtime = timespec_load(&st.st_mtim);
 458
 459         return 0;
 460
 461 fail:
 462         if (temp_path)
 463                 (void) unlink(temp_path);
 464
 465         return r;
 466 }
 467
 468 static int read_next_mapping(const char* filename,
 469                              unsigned min_fields, unsigned max_fields,
 470                              FILE *f, unsigned *n, char ***a) {
 471         assert(f);
 472         assert(n);
 473         assert(a);
 474
 475         for (;;) {
 476                 _cleanup_free_ char *line = NULL;
 477                 size_t length;
 478                 char *l, **b;
 479                 int r;
 480
 481                 r = read_line(f, LONG_LINE_MAX, &line);
 482                 if (r < 0)
 483                         return r;
 484                 if (r == 0)
 485                         break;
 486
 487                 (*n)++;
 488
 489                 l = strstrip(line);
 490                 if (IN_SET(l[0], 0, '#'))
 491                         continue;
 492
 493                 r = strv_split_extract(&b, l, WHITESPACE, EXTRACT_UNQUOTE);
 494                 if (r < 0)
 495                         return r;
 496
 497                 length = strv_length(b);
 498                 if (length < min_fields || length > max_fields) {
 499                         log_error("Invalid line %s:%u, ignoring.", filename, *n);
 500                         strv_free(b);
 501                         continue;
 502
 503                 }
 504
 505                 *a = b;
 506                 return 1;
 507         }
 508
 509         return 0;
 510 }
 511
 512 int vconsole_convert_to_x11(Context *c) {
 513         const char *map;
 514         int modified = -1;
 515
 516         map = systemd_kbd_model_map();
 517
 518         if (isempty(c->vc_keymap)) {
 519                 modified =
 520                         !isempty(c->x11_layout) ||
 521                         !isempty(c->x11_model) ||
 522                         !isempty(c->x11_variant) ||
 523                         !isempty(c->x11_options);
 524
 525                 context_free_x11(c);
 526         } else {
 527                 _cleanup_fclose_ FILE *f = NULL;
 528                 unsigned n = 0;
 529
 530                 f = fopen(map, "re");
 531                 if (!f)
 532                         return -errno;
 533
 534                 for (;;) {
 535                         _cleanup_strv_free_ char **a = NULL;
 536                         int r;
 537
 538                         r = read_next_mapping(map, 5, UINT_MAX, f, &n, &a);
 539                         if (r < 0)
 540                                 return r;
 541                         if (r == 0)
 542                                 break;
 543
 544                         if (!streq(c->vc_keymap, a[0]))
 545                                 continue;
 546
 547                         if (!streq_ptr(c->x11_layout, empty_or_dash_to_null(a[1])) ||
 548                             !streq_ptr(c->x11_model, empty_or_dash_to_null(a[2])) ||
 549                             !streq_ptr(c->x11_variant, empty_or_dash_to_null(a[3])) ||
 550                             !streq_ptr(c->x11_options, empty_or_dash_to_null(a[4]))) {
 551
 552                                 if (free_and_strdup(&c->x11_layout, empty_or_dash_to_null(a[1])) < 0 ||
 553                                     free_and_strdup(&c->x11_model, empty_or_dash_to_null(a[2])) < 0 ||
 554                                     free_and_strdup(&c->x11_variant, empty_or_dash_to_null(a[3])) < 0 ||
 555                                     free_and_strdup(&c->x11_options, empty_or_dash_to_null(a[4])) < 0)
 556                                         return -ENOMEM;
 557
 558                                 modified = true;
 559                         }
 560
 561                         break;
 562                 }
 563         }
 564
 565         if (modified > 0)
 566                 log_info("Changing X11 keyboard layout to '%s' model '%s' variant '%s' options '%s'",
 567                          strempty(c->x11_layout),
 568                          strempty(c->x11_model),
 569                          strempty(c->x11_variant),
 570                          strempty(c->x11_options));
 571         else if (modified < 0)
 572                 log_notice("X11 keyboard layout was not modified: no conversion found for \"%s\".",
 573                            c->vc_keymap);
 574         else
 575                 log_debug("X11 keyboard layout did not need to be modified.");
 576
 577         return modified > 0;
 578 }
 579
 580 int find_converted_keymap(const char *x11_layout, const char *x11_variant, char **new_keymap) {
 581         const char *dir;
 582         _cleanup_free_ char *n;
 583
 584         if (x11_variant)
 585                 n = strjoin(x11_layout, "-", x11_variant);
 586         else
 587                 n = strdup(x11_layout);
 588         if (!n)
 589                 return -ENOMEM;
 590
 591         NULSTR_FOREACH(dir, KBD_KEYMAP_DIRS) {
 592                 _cleanup_free_ char *p = NULL, *pz = NULL;
 593                 bool uncompressed;
 594
 595                 p = strjoin(dir, "xkb/", n, ".map");
 596                 pz = strjoin(dir, "xkb/", n, ".map.gz");
 597                 if (!p || !pz)
 598                         return -ENOMEM;
 599
 600                 uncompressed = access(p, F_OK) == 0;
 601                 if (uncompressed || access(pz, F_OK) == 0) {
 602                         log_debug("Found converted keymap %s at %s",
 603                                   n, uncompressed ? p : pz);
 604
 605                         *new_keymap = TAKE_PTR(n);
 606                         return 1;
 607                 }
 608         }
 609
 610         return 0;
 611 }
 612
 613 int find_legacy_keymap(Context *c, char **ret) {
 614         const char *map;
 615         _cleanup_fclose_ FILE *f = NULL;
 616         _cleanup_free_ char *new_keymap = NULL;
 617         unsigned n = 0;
 618         unsigned best_matching = 0;
 619         int r;
 620
 621         assert(!isempty(c->x11_layout));
 622
 623         map = systemd_kbd_model_map();
 624
 625         f = fopen(map, "re");
 626         if (!f)
 627                 return -errno;
 628
 629         for (;;) {
 630                 _cleanup_strv_free_ char **a = NULL;
 631                 unsigned matching = 0;
 632
 633                 r = read_next_mapping(map, 5, UINT_MAX, f, &n, &a);
 634                 if (r < 0)
 635                         return r;
 636                 if (r == 0)
 637                         break;
 638
 639                 /* Determine how well matching this entry is */
 640                 if (streq(c->x11_layout, a[1]))
 641                         /* If we got an exact match, this is best */
 642                         matching = 10;
 643                 else {
 644                         /* We have multiple X layouts, look for an
 645                          * entry that matches our key with everything
 646                          * but the first layout stripped off. */
 647                         if (startswith_comma(c->x11_layout, a[1]))
 648                                 matching = 5;
 649                         else  {
 650                                 _cleanup_free_ char *x = NULL;
 651
 652                                 /* If that didn't work, strip off the
 653                                  * other layouts from the entry, too */
 654                                 x = strndup(a[1], strcspn(a[1], ","));
 655                                 if (startswith_comma(c->x11_layout, x))
 656                                         matching = 1;
 657                         }
 658                 }
 659
 660                 if (matching > 0) {
 661                         if (isempty(c->x11_model) || streq_ptr(c->x11_model, a[2])) {
 662                                 matching++;
 663
 664                                 if (streq_ptr(c->x11_variant, a[3])) {
 665                                         matching++;
 666
 667                                         if (streq_ptr(c->x11_options, a[4]))
 668                                                 matching++;
 669                                 }
 670                         }
 671                 }
 672
 673                 /* The best matching entry so far, then let's save that */
 674                 if (matching >= MAX(best_matching, 1u)) {
 675                         log_debug("Found legacy keymap %s with score %u",
 676                                   a[0], matching);
 677
 678                         if (matching > best_matching) {
 679                                 best_matching = matching;
 680
 681                                 r = free_and_strdup(&new_keymap, a[0]);
 682                                 if (r < 0)
 683                                         return r;
 684                         }
 685                 }
 686         }
 687
 688         if (best_matching < 10 && c->x11_layout) {
 689                 /* The best match is only the first part of the X11
 690                  * keymap. Check if we have a converted map which
 691                  * matches just the first layout.
 692                  */
 693                 char *l, *v = NULL, *converted;
 694
 695                 l = strndupa(c->x11_layout, strcspn(c->x11_layout, ","));
 696                 if (c->x11_variant)
 697                         v = strndupa(c->x11_variant, strcspn(c->x11_variant, ","));
 698                 r = find_converted_keymap(l, v, &converted);
 699                 if (r < 0)
 700                         return r;
 701                 if (r > 0)
 702                         free_and_replace(new_keymap, converted);
 703         }
 704
 705         *ret = TAKE_PTR(new_keymap);
 706         return (bool) *ret;
 707 }
 708
 709 int find_language_fallback(const char *lang, char **language) {
 710         const char *map;
 711         _cleanup_fclose_ FILE *f = NULL;
 712         unsigned n = 0;
 713
 714         assert(lang);
 715         assert(language);
 716
 717         map = systemd_language_fallback_map();
 718
 719         f = fopen(map, "re");
 720         if (!f)
 721                 return -errno;
 722
 723         for (;;) {
 724                 _cleanup_strv_free_ char **a = NULL;
 725                 int r;
 726
 727                 r = read_next_mapping(map, 2, 2, f, &n, &a);
 728                 if (r <= 0)
 729                         return r;
 730
 731                 if (streq(lang, a[0])) {
 732                         assert(strv_length(a) == 2);
 733                         *language = TAKE_PTR(a[1]);
 734                         return 1;
 735                 }
 736         }
 737
 738         assert_not_reached("should not be here");
 739 }
 740
 741 int x11_convert_to_vconsole(Context *c) {
 742         bool modified = false;
 743
 744         if (isempty(c->x11_layout)) {
 745                 modified =
 746                         !isempty(c->vc_keymap) ||
 747                         !isempty(c->vc_keymap_toggle);
 748
 749                 context_free_vconsole(c);
 750         } else {
 751                 _cleanup_free_ char *new_keymap = NULL;
 752                 int r;
 753
 754                 r = find_converted_keymap(c->x11_layout, c->x11_variant, &new_keymap);
 755                 if (r < 0)
 756                         return r;
 757                 else if (r == 0) {
 758                         r = find_legacy_keymap(c, &new_keymap);
 759                         if (r < 0)
 760                                 return r;
 761                 }
 762                 if (r == 0)
 763                         /* We search for layout-variant match first, but then we also look
 764                          * for anything which matches just the layout. So it's accurate to say
 765                          * that we couldn't find anything which matches the layout. */
 766                         log_notice("No conversion to virtual console map found for \"%s\".",
 767                                    c->x11_layout);
 768
 769                 if (!streq_ptr(c->vc_keymap, new_keymap)) {
 770                         free_and_replace(c->vc_keymap, new_keymap);
 771                         c->vc_keymap_toggle = mfree(c->vc_keymap_toggle);
 772                         modified = true;
 773                 }
 774         }
 775
 776         if (modified)
 777                 log_info("Changing virtual console keymap to '%s' toggle '%s'",
 778                          strempty(c->vc_keymap), strempty(c->vc_keymap_toggle));
 779         else
 780                 log_debug("Virtual console keymap was not modified.");
 781
 782         return modified;
 783 }