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         if (argv[1])
 175                 vc = argv[1];
 176         else
 177                 vc = "/dev/tty0";
 178
 179         if ((fd = open(vc, O_RDWR|O_CLOEXEC)) < 0) {
 180                 log_error("Failed to open %s: %m", vc);
 181                 goto finish;
 182         }
 183
 184         if (!is_vconsole(fd)) {
 185                 log_error("Device %s is not a virtual console.", vc);
 186                 goto finish;
 187         }
 188
 189         utf8 = is_locale_utf8();
 190
 191         vc_keymap = strdup("us");
 192         vc_font = strdup(DEFAULT_FONT);
 193
 194         if (!vc_keymap || !vc_font) {
 195                 log_error("Failed to allocate strings.");
 196                 goto finish;
 197         }
 198
 199         r = 0;
 200
 201         if (detect_container(NULL) <= 0)
 202                 if ((r = parse_env_file("/proc/cmdline", WHITESPACE,
 203 #if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
 204                                         "SYSFONT", &vc_font,
 205                                         "KEYTABLE", &vc_keymap,
 206 #endif
 207                                         "vconsole.keymap", &vc_keymap,
 208                                         "vconsole.keymap.toggle", &vc_keymap_toggle,
 209                                         "vconsole.font", &vc_font,
 210                                         "vconsole.font.map", &vc_font_map,
 211                                         "vconsole.font.unimap", &vc_font_unimap,
 212                                         NULL)) < 0) {
 213
 214                         if (r != -ENOENT)
 215                                 log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 216                 }
 217
 218         /* Hmm, nothing set on the kernel cmd line? Then let's
 219          * try /etc/vconsole.conf */
 220         if (r <= 0 &&
 221             (r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 222                                 "KEYMAP", &vc_keymap,
 223                                 "KEYMAP_TOGGLE", &vc_keymap_toggle,
 224                                 "FONT", &vc_font,
 225                                 "FONT_MAP", &vc_font_map,
 226                                 "FONT_UNIMAP", &vc_font_unimap,
 227                                 NULL)) < 0) {
 228
 229                 if (r != -ENOENT)
 230                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 231         }
 232
 233         if (r <= 0) {
 234 #if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
 235                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 236                                         "SYSFONT", &vc_font,
 237                                         "SYSFONTACM", &vc_font_map,
 238                                         "UNIMAP", &vc_font_unimap,
 239                                         NULL)) < 0) {
 240
 241                         if (r != -ENOENT)
 242                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 243                 }
 244
 245                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 246                                         "KEYTABLE", &vc_keymap,
 247                                         "KEYMAP", &vc_keymap,
 248                                         NULL)) < 0) {
 249
 250                         if (r != -ENOENT)
 251                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 252                 }
 253
 254                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 255                         char *t;
 256
 257                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 258                                 log_error("Out of memory.");
 259                                 goto finish;
 260                         }
 261
 262                         free(vc_keymap);
 263                         vc_keymap = t;
 264                 }
 265
 266 #elif defined(TARGET_SUSE)
 267                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 268                                         "KEYTABLE", &vc_keymap,
 269                                         NULL)) < 0) {
 270
 271                         if (r != -ENOENT)
 272                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 273                 }
 274
 275                 if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 276                                         "CONSOLE_FONT", &vc_font,
 277                                         "CONSOLE_SCREENMAP", &vc_font_map,
 278                                         "CONSOLE_UNICODEMAP", &vc_font_unimap,
 279                                         NULL)) < 0) {
 280
 281                         if (r != -ENOENT)
 282                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 283                 }
 284
 285 #elif defined(TARGET_ARCH)
 286                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 287                                         "KEYMAP", &vc_keymap,
 288                                         "CONSOLEFONT", &vc_font,
 289                                         "CONSOLEMAP", &vc_font_map,
 290                                         NULL)) < 0) {
 291
 292                         if (r != -ENOENT)
 293                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 294                 }
 295
 296 #elif defined(TARGET_FRUGALWARE)
 297                 if ((r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
 298                                         "keymap", &vc_keymap,
 299                                         NULL)) < 0) {
 300                         if (r != -ENOENT)
 301                                 log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
 302                 }
 303                 if ((r = parse_env_file("/etc/sysconfig/font", NEWLINE,
 304                                         "font", &vc_font,
 305                                         NULL)) < 0) {
 306                         if (r != -ENOENT)
 307                                 log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
 308                 }
 309
 310 #elif defined(TARGET_ALTLINUX)
 311                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 312                                         "KEYTABLE", &vc_keymap,
 313                                         NULL)) < 0) {
 314
 315                         if (r != -ENOENT)
 316                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 317                 }
 318
 319                 if ((r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 320                                         "SYSFONT", &vc_font,
 321                                         NULL)) < 0) {
 322
 323                         if (r != -ENOENT)
 324                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 325                 }
 326
 327 #elif defined(TARGET_GENTOO)
 328                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 329                                         "unicode", &vc_unicode,
 330                                         NULL)) < 0) {
 331                         if (r != -ENOENT)
 332                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 333                 }
 334
 335                 if (vc_unicode) {
 336                         int rc_unicode;
 337
 338                         if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
 339                                 log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 340                         else {
 341                                 if (rc_unicode && !utf8)
 342                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 343                                 else if (!rc_unicode && utf8) {
 344                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 345                                         utf8 = false;
 346                                 }
 347                         }
 348                 }
 349
 350                 /* /etc/conf.d/consolefont comments and gentoo
 351                  * documentation mention uppercase, but the actual
 352                  * contents are lowercase.  the existing
 353                  * /etc/init.d/consolefont tries both
 354                  */
 355                 if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 356                                         "CONSOLEFONT", &vc_font,
 357                                         "consolefont", &vc_font,
 358                                         "consoletranslation", &vc_font_map,
 359                                         "CONSOLETRANSLATION", &vc_font_map,
 360                                         "unicodemap", &vc_font_unimap,
 361                                         "UNICODEMAP", &vc_font_unimap,
 362                                         NULL)) < 0) {
 363                         if (r != -ENOENT)
 364                                 log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 365                 }
 366
 367                 if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 368                                         "keymap", &vc_keymap,
 369                                         "KEYMAP", &vc_keymap,
 370                                         NULL)) < 0) {
 371                         if (r != -ENOENT)
 372                                 log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 373                 }
 374
 375 #elif defined(TARGET_MANDRIVA)
 376
 377                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 378                                         "SYSFONT", &vc_font,
 379                                         "SYSFONTACM", &vc_font_map,
 380                                         "UNIMAP", &vc_font_unimap,
 381                                         NULL)) < 0) {
 382
 383                         if (r != -ENOENT)
 384                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 385                 }
 386
 387                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 388                                         "KEYTABLE", &vc_keytable,
 389                                         "KEYMAP", &vc_keymap,
 390                                         "UNIKEYTABLE", &vc_keymap,
 391                                         "GRP_TOGGLE", &vc_keymap_toggle,
 392                                         NULL)) < 0) {
 393
 394                         if (r != -ENOENT)
 395                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 396                 }
 397
 398                 if (vc_keytable) {
 399                         if (vc_keymap)
 400                                 free(vc_keymap);
 401                         if (utf8) {
 402                                 if (endswith(vc_keytable, ".uni") || strstr(vc_keytable, ".uni."))
 403                                         vc_keymap = strdup(vc_keytable);
 404                                 else {
 405                                         char *s;
 406                                         if ((s = strstr(vc_keytable, ".map")))
 407                                                 vc_keytable[s-vc_keytable+1] = '\0';
 408                                         vc_keymap = strappend(vc_keytable, ".uni");
 409                                 }
 410                         } else
 411                                 vc_keymap = strdup(vc_keytable);
 412
 413                         free(vc_keytable);
 414
 415                         if (!vc_keymap) {
 416                                 log_error("Out of memory.");
 417                                 goto finish;
 418                         }
 419                 }
 420
 421                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 422                         char *t;
 423
 424                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 425                                 log_error("Out of memory.");
 426                                 goto finish;
 427                         }
 428
 429                         free(vc_keymap);
 430                         vc_keymap = t;
 431                 }
 432 #endif
 433         }
 434
 435         r = EXIT_FAILURE;
 436
 437         if (!utf8)
 438                 disable_utf8(fd);
 439
 440         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 441             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 442                 r = EXIT_SUCCESS;
 443
 444 finish:
 445         if (keymap_pid > 0)
 446                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 447
 448         if (font_pid > 0)
 449                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 450
 451         free(vc_keymap);
 452         free(vc_font);
 453         free(vc_font_map);
 454         free(vc_font_unimap);
 455
 456         if (fd >= 0)
 457                 close_nointr_nofail(fd);
 458
 459         return r;
 460 }