src/vconsole-setup.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Kay Sievers
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <stdio.h>
  23 #include <unistd.h>
  24 #include <stdlib.h>
  25 #include <errno.h>
  26 #include <string.h>
  27 #include <fcntl.h>
  28 #include <ctype.h>
  29 #include <stdbool.h>
  30 #include <stdarg.h>
  31 #include <limits.h>
  32 #include <locale.h>
  33 #include <langinfo.h>
  34 #include <sys/ioctl.h>
  35 #include <sys/wait.h>
  36 #include <linux/tiocl.h>
  37 #include <linux/kd.h>
  38
  39 #include "util.h"
  40 #include "log.h"
  41 #include "macro.h"
  42
  43 static bool is_vconsole(int fd) {
  44         unsigned char data[1];
  45
  46         data[0] = TIOCL_GETFGCONSOLE;
  47         return ioctl(fd, TIOCLINUX, data) >= 0;
  48 }
  49
  50 static bool is_locale_utf8(void) {
  51         const char *set;
  52
  53         if (!setlocale(LC_ALL, ""))
  54                 return true;
  55
  56         set = nl_langinfo(CODESET);
  57         if (!set)
  58                 return true;
  59
  60         return streq(set, "UTF-8");
  61 }
  62
  63 static int disable_utf8(int fd) {
  64         int r = 0, k;
  65
  66         if (ioctl(fd, KDSKBMODE, K_XLATE) < 0)
  67                 r = -errno;
  68
  69         if (loop_write(fd, "\033%@", 3, false) < 0)
  70                 r = -errno;
  71
  72         if ((k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "0")) < 0)
  73                 r = k;
  74
  75         if (r < 0)
  76                 log_warning("Failed to disable UTF-8: %s", strerror(errno));
  77
  78         return r;
  79 }
  80
  81 static int load_keymap(const char *vc, const char *map, const char *map_toggle, bool utf8, pid_t *_pid) {
  82         const char *args[8];
  83         int i = 0;
  84         pid_t pid;
  85
  86         if (isempty(map)) {
  87                 /* An empty map means kernel map */
  88                 *_pid = 0;
  89                 return 0;
  90         }
  91
  92         args[i++] = KBD_LOADKEYS;
  93         args[i++] = "-q";
  94         args[i++] = "-C";
  95         args[i++] = vc;
  96         if (utf8)
  97                 args[i++] = "-u";
  98         args[i++] = map;
  99         if (map_toggle)
 100                 args[i++] = map_toggle;
 101         args[i++] = NULL;
 102
 103         if ((pid = fork()) < 0) {
 104                 log_error("Failed to fork: %m");
 105                 return -errno;
 106         } else if (pid == 0) {
 107                 execv(args[0], (char **) args);
 108                 _exit(EXIT_FAILURE);
 109         }
 110
 111         *_pid = pid;
 112         return 0;
 113 }
 114
 115 static int load_font(const char *vc, const char *font, const char *map, const char *unimap, pid_t *_pid) {
 116         const char *args[9];
 117         int i = 0;
 118         pid_t pid;
 119
 120         if (isempty(font)) {
 121                 /* An empty font means kernel font */
 122                 *_pid = 0;
 123                 return 0;
 124         }
 125
 126         args[i++] = KBD_SETFONT;
 127         args[i++] = "-C";
 128         args[i++] = vc;
 129         args[i++] = font;
 130         if (map) {
 131                 args[i++] = "-m";
 132                 args[i++] = map;
 133         }
 134         if (unimap) {
 135                 args[i++] = "-u";
 136                 args[i++] = unimap;
 137         }
 138         args[i++] = NULL;
 139
 140         if ((pid = fork()) < 0) {
 141                 log_error("Failed to fork: %m");
 142                 return -errno;
 143         } else if (pid == 0) {
 144                 execv(args[0], (char **) args);
 145                 _exit(EXIT_FAILURE);
 146         }
 147
 148         *_pid = pid;
 149         return 0;
 150 }
 151
 152 int main(int argc, char **argv) {
 153         const char *vc;
 154         char *vc_keymap = NULL;
 155         char *vc_keymap_toggle = NULL;
 156         char *vc_font = NULL;
 157         char *vc_font_map = NULL;
 158         char *vc_font_unimap = NULL;
 159 #ifdef TARGET_GENTOO
 160         char *vc_unicode = NULL;
 161 #endif
 162 #ifdef TARGET_MANDRIVA
 163         char *vc_keytable = NULL;
 164 #endif
 165         int fd = -1;
 166         bool utf8;
 167         int r = EXIT_FAILURE;
 168         pid_t font_pid = 0, keymap_pid = 0;
 169
 170         log_set_target(LOG_TARGET_AUTO);
 171         log_parse_environment();
 172         log_open();
 173
 174         umask(0022);
 175
 176         if (argv[1])
 177                 vc = argv[1];
 178         else
 179                 vc = "/dev/tty0";
 180
 181         if ((fd = open_terminal(vc, O_RDWR|O_CLOEXEC)) < 0) {
 182                 log_error("Failed to open %s: %m", vc);
 183                 goto finish;
 184         }
 185
 186         if (!is_vconsole(fd)) {
 187                 log_error("Device %s is not a virtual console.", vc);
 188                 goto finish;
 189         }
 190
 191         utf8 = is_locale_utf8();
 192
 193         vc_keymap = strdup("us");
 194         vc_font = strdup(DEFAULT_FONT);
 195
 196         if (!vc_keymap || !vc_font) {
 197                 log_error("Failed to allocate strings.");
 198                 goto finish;
 199         }
 200
 201         r = 0;
 202
 203         if (detect_container(NULL) <= 0)
 204                 if ((r = parse_env_file("/proc/cmdline", WHITESPACE,
 205 #if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
 206                                         "SYSFONT", &vc_font,
 207                                         "KEYTABLE", &vc_keymap,
 208 #endif
 209                                         "vconsole.keymap", &vc_keymap,
 210                                         "vconsole.keymap.toggle", &vc_keymap_toggle,
 211                                         "vconsole.font", &vc_font,
 212                                         "vconsole.font.map", &vc_font_map,
 213                                         "vconsole.font.unimap", &vc_font_unimap,
 214                                         NULL)) < 0) {
 215
 216                         if (r != -ENOENT)
 217                                 log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 218                 }
 219
 220         /* Hmm, nothing set on the kernel cmd line? Then let's
 221          * try /etc/vconsole.conf */
 222         if (r <= 0 &&
 223             (r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 224                                 "KEYMAP", &vc_keymap,
 225                                 "KEYMAP_TOGGLE", &vc_keymap_toggle,
 226                                 "FONT", &vc_font,
 227                                 "FONT_MAP", &vc_font_map,
 228                                 "FONT_UNIMAP", &vc_font_unimap,
 229                                 NULL)) < 0) {
 230
 231                 if (r != -ENOENT)
 232                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 233         }
 234
 235         if (r <= 0) {
 236 #if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
 237                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 238                                         "SYSFONT", &vc_font,
 239                                         "SYSFONTACM", &vc_font_map,
 240                                         "UNIMAP", &vc_font_unimap,
 241                                         NULL)) < 0) {
 242
 243                         if (r != -ENOENT)
 244                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 245                 }
 246
 247                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 248                                         "KEYTABLE", &vc_keymap,
 249                                         "KEYMAP", &vc_keymap,
 250                                         NULL)) < 0) {
 251
 252                         if (r != -ENOENT)
 253                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 254                 }
 255
 256                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 257                         char *t;
 258
 259                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 260                                 log_error("Out of memory.");
 261                                 goto finish;
 262                         }
 263
 264                         free(vc_keymap);
 265                         vc_keymap = t;
 266                 }
 267
 268 #elif defined(TARGET_SUSE)
 269                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 270                                         "KEYTABLE", &vc_keymap,
 271                                         NULL)) < 0) {
 272
 273                         if (r != -ENOENT)
 274                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 275                 }
 276
 277                 if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 278                                         "CONSOLE_FONT", &vc_font,
 279                                         "CONSOLE_SCREENMAP", &vc_font_map,
 280                                         "CONSOLE_UNICODEMAP", &vc_font_unimap,
 281                                         NULL)) < 0) {
 282
 283                         if (r != -ENOENT)
 284                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 285                 }
 286
 287 #elif defined(TARGET_ARCH)
 288                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 289                                         "KEYMAP", &vc_keymap,
 290                                         "CONSOLEFONT", &vc_font,
 291                                         "CONSOLEMAP", &vc_font_map,
 292                                         NULL)) < 0) {
 293
 294                         if (r != -ENOENT)
 295                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 296                 }
 297
 298 #elif defined(TARGET_FRUGALWARE)
 299                 if ((r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
 300                                         "keymap", &vc_keymap,
 301                                         NULL)) < 0) {
 302                         if (r != -ENOENT)
 303                                 log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
 304                 }
 305                 if ((r = parse_env_file("/etc/sysconfig/font", NEWLINE,
 306                                         "font", &vc_font,
 307                                         NULL)) < 0) {
 308                         if (r != -ENOENT)
 309                                 log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
 310                 }
 311
 312 #elif defined(TARGET_ALTLINUX)
 313                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 314                                         "KEYTABLE", &vc_keymap,
 315                                         NULL)) < 0) {
 316
 317                         if (r != -ENOENT)
 318                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 319                 }
 320
 321                 if ((r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 322                                         "SYSFONT", &vc_font,
 323                                         NULL)) < 0) {
 324
 325                         if (r != -ENOENT)
 326                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 327                 }
 328
 329 #elif defined(TARGET_GENTOO)
 330                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 331                                         "unicode", &vc_unicode,
 332                                         NULL)) < 0) {
 333                         if (r != -ENOENT)
 334                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 335                 }
 336
 337                 if (vc_unicode) {
 338                         int rc_unicode;
 339
 340                         if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
 341                                 log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 342                         else {
 343                                 if (rc_unicode && !utf8)
 344                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 345                                 else if (!rc_unicode && utf8) {
 346                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 347                                         utf8 = false;
 348                                 }
 349                         }
 350                 }
 351
 352                 /* /etc/conf.d/consolefont comments and gentoo
 353                  * documentation mention uppercase, but the actual
 354                  * contents are lowercase.  the existing
 355                  * /etc/init.d/consolefont tries both
 356                  */
 357                 if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 358                                         "CONSOLEFONT", &vc_font,
 359                                         "consolefont", &vc_font,
 360                                         "consoletranslation", &vc_font_map,
 361                                         "CONSOLETRANSLATION", &vc_font_map,
 362                                         "unicodemap", &vc_font_unimap,
 363                                         "UNICODEMAP", &vc_font_unimap,
 364                                         NULL)) < 0) {
 365                         if (r != -ENOENT)
 366                                 log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 367                 }
 368
 369                 if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 370                                         "keymap", &vc_keymap,
 371                                         "KEYMAP", &vc_keymap,
 372                                         NULL)) < 0) {
 373                         if (r != -ENOENT)
 374                                 log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 375                 }
 376
 377 #elif defined(TARGET_MANDRIVA)
 378
 379                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 380                                         "SYSFONT", &vc_font,
 381                                         "SYSFONTACM", &vc_font_map,
 382                                         "UNIMAP", &vc_font_unimap,
 383                                         NULL)) < 0) {
 384
 385                         if (r != -ENOENT)
 386                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 387                 }
 388
 389                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 390                                         "KEYTABLE", &vc_keytable,
 391                                         "KEYMAP", &vc_keymap,
 392                                         "UNIKEYTABLE", &vc_keymap,
 393                                         "GRP_TOGGLE", &vc_keymap_toggle,
 394                                         NULL)) < 0) {
 395
 396                         if (r != -ENOENT)
 397                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 398                 }
 399
 400                 if (vc_keytable) {
 401                         if (vc_keymap)
 402                                 free(vc_keymap);
 403                         if (utf8) {
 404                                 if (endswith(vc_keytable, ".uni") || strstr(vc_keytable, ".uni."))
 405                                         vc_keymap = strdup(vc_keytable);
 406                                 else {
 407                                         char *s;
 408                                         if ((s = strstr(vc_keytable, ".map")))
 409                                                 vc_keytable[s-vc_keytable+1] = '\0';
 410                                         vc_keymap = strappend(vc_keytable, ".uni");
 411                                 }
 412                         } else
 413                                 vc_keymap = strdup(vc_keytable);
 414
 415                         free(vc_keytable);
 416
 417                         if (!vc_keymap) {
 418                                 log_error("Out of memory.");
 419                                 goto finish;
 420                         }
 421                 }
 422
 423                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 424                         char *t;
 425
 426                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 427                                 log_error("Out of memory.");
 428                                 goto finish;
 429                         }
 430
 431                         free(vc_keymap);
 432                         vc_keymap = t;
 433                 }
 434 #endif
 435         }
 436
 437         r = EXIT_FAILURE;
 438
 439         if (!utf8)
 440                 disable_utf8(fd);
 441
 442         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 443             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 444                 r = EXIT_SUCCESS;
 445
 446 finish:
 447         if (keymap_pid > 0)
 448                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 449
 450         if (font_pid > 0)
 451                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 452
 453         free(vc_keymap);
 454         free(vc_font);
 455         free(vc_font_map);
 456         free(vc_font_unimap);
 457
 458         if (fd >= 0)
 459                 close_nointr_nofail(fd);
 460
 461         return r;
 462 }