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 #include "virt.h"
  43
  44 static bool is_vconsole(int fd) {
  45         unsigned char data[1];
  46
  47         data[0] = TIOCL_GETFGCONSOLE;
  48         return ioctl(fd, TIOCLINUX, data) >= 0;
  49 }
  50
  51 static bool is_locale_utf8(void) {
  52         const char *set;
  53
  54         if (!setlocale(LC_ALL, ""))
  55                 return true;
  56
  57         set = nl_langinfo(CODESET);
  58         if (!set)
  59                 return true;
  60
  61         return streq(set, "UTF-8");
  62 }
  63
  64 static int disable_utf8(int fd) {
  65         int r = 0, k;
  66
  67         if (ioctl(fd, KDSKBMODE, K_XLATE) < 0)
  68                 r = -errno;
  69
  70         if (loop_write(fd, "\033%@", 3, false) < 0)
  71                 r = -errno;
  72
  73         if ((k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "0")) < 0)
  74                 r = k;
  75
  76         if (r < 0)
  77                 log_warning("Failed to disable UTF-8: %s", strerror(errno));
  78
  79         return r;
  80 }
  81
  82 static int load_keymap(const char *vc, const char *map, const char *map_toggle, bool utf8, pid_t *_pid) {
  83         const char *args[8];
  84         int i = 0;
  85         pid_t pid;
  86
  87         if (isempty(map)) {
  88                 /* An empty map means kernel map */
  89                 *_pid = 0;
  90                 return 0;
  91         }
  92
  93         args[i++] = KBD_LOADKEYS;
  94         args[i++] = "-q";
  95         args[i++] = "-C";
  96         args[i++] = vc;
  97         if (utf8)
  98                 args[i++] = "-u";
  99         args[i++] = map;
 100         if (map_toggle)
 101                 args[i++] = map_toggle;
 102         args[i++] = NULL;
 103
 104         if ((pid = fork()) < 0) {
 105                 log_error("Failed to fork: %m");
 106                 return -errno;
 107         } else if (pid == 0) {
 108                 execv(args[0], (char **) args);
 109                 _exit(EXIT_FAILURE);
 110         }
 111
 112         *_pid = pid;
 113         return 0;
 114 }
 115
 116 static int load_font(const char *vc, const char *font, const char *map, const char *unimap, pid_t *_pid) {
 117         const char *args[9];
 118         int i = 0;
 119         pid_t pid;
 120
 121         if (isempty(font)) {
 122                 /* An empty font means kernel font */
 123                 *_pid = 0;
 124                 return 0;
 125         }
 126
 127         args[i++] = KBD_SETFONT;
 128         args[i++] = "-C";
 129         args[i++] = vc;
 130         args[i++] = font;
 131         if (map) {
 132                 args[i++] = "-m";
 133                 args[i++] = map;
 134         }
 135         if (unimap) {
 136                 args[i++] = "-u";
 137                 args[i++] = unimap;
 138         }
 139         args[i++] = NULL;
 140
 141         if ((pid = fork()) < 0) {
 142                 log_error("Failed to fork: %m");
 143                 return -errno;
 144         } else if (pid == 0) {
 145                 execv(args[0], (char **) args);
 146                 _exit(EXIT_FAILURE);
 147         }
 148
 149         *_pid = pid;
 150         return 0;
 151 }
 152
 153 int main(int argc, char **argv) {
 154         const char *vc;
 155         char *vc_keymap = NULL;
 156         char *vc_keymap_toggle = NULL;
 157         char *vc_font = NULL;
 158         char *vc_font_map = NULL;
 159         char *vc_font_unimap = NULL;
 160 #ifdef TARGET_GENTOO
 161         char *vc_unicode = NULL;
 162 #endif
 163 #ifdef TARGET_MANDRIVA
 164         char *vc_keytable = NULL;
 165 #endif
 166         int fd = -1;
 167         bool utf8;
 168         int r = EXIT_FAILURE;
 169         pid_t font_pid = 0, keymap_pid = 0;
 170
 171         log_set_target(LOG_TARGET_AUTO);
 172         log_parse_environment();
 173         log_open();
 174
 175         umask(0022);
 176
 177         if (argv[1])
 178                 vc = argv[1];
 179         else
 180                 vc = "/dev/tty0";
 181
 182         if ((fd = open_terminal(vc, O_RDWR|O_CLOEXEC)) < 0) {
 183                 log_error("Failed to open %s: %m", vc);
 184                 goto finish;
 185         }
 186
 187         if (!is_vconsole(fd)) {
 188                 log_error("Device %s is not a virtual console.", vc);
 189                 goto finish;
 190         }
 191
 192         utf8 = is_locale_utf8();
 193
 194         vc_keymap = strdup("us");
 195         vc_font = strdup(DEFAULT_FONT);
 196
 197         if (!vc_keymap || !vc_font) {
 198                 log_error("Failed to allocate strings.");
 199                 goto finish;
 200         }
 201
 202         r = 0;
 203
 204         if (detect_container(NULL) <= 0)
 205                 if ((r = parse_env_file("/proc/cmdline", WHITESPACE,
 206 #if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
 207                                         "SYSFONT", &vc_font,
 208                                         "KEYTABLE", &vc_keymap,
 209 #endif
 210                                         "vconsole.keymap", &vc_keymap,
 211                                         "vconsole.keymap.toggle", &vc_keymap_toggle,
 212                                         "vconsole.font", &vc_font,
 213                                         "vconsole.font.map", &vc_font_map,
 214                                         "vconsole.font.unimap", &vc_font_unimap,
 215                                         NULL)) < 0) {
 216
 217                         if (r != -ENOENT)
 218                                 log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 219                 }
 220
 221         /* Hmm, nothing set on the kernel cmd line? Then let's
 222          * try /etc/vconsole.conf */
 223         if (r <= 0 &&
 224             (r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 225                                 "KEYMAP", &vc_keymap,
 226                                 "KEYMAP_TOGGLE", &vc_keymap_toggle,
 227                                 "FONT", &vc_font,
 228                                 "FONT_MAP", &vc_font_map,
 229                                 "FONT_UNIMAP", &vc_font_unimap,
 230                                 NULL)) < 0) {
 231
 232                 if (r != -ENOENT)
 233                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 234         }
 235
 236         if (r <= 0) {
 237 #if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
 238                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 239                                         "SYSFONT", &vc_font,
 240                                         "SYSFONTACM", &vc_font_map,
 241                                         "UNIMAP", &vc_font_unimap,
 242                                         NULL)) < 0) {
 243
 244                         if (r != -ENOENT)
 245                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 246                 }
 247
 248                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 249                                         "KEYTABLE", &vc_keymap,
 250                                         "KEYMAP", &vc_keymap,
 251                                         NULL)) < 0) {
 252
 253                         if (r != -ENOENT)
 254                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 255                 }
 256
 257                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 258                         char *t;
 259
 260                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 261                                 log_error("Out of memory.");
 262                                 goto finish;
 263                         }
 264
 265                         free(vc_keymap);
 266                         vc_keymap = t;
 267                 }
 268
 269 #elif defined(TARGET_SUSE)
 270                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 271                                         "KEYTABLE", &vc_keymap,
 272                                         NULL)) < 0) {
 273
 274                         if (r != -ENOENT)
 275                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 276                 }
 277
 278                 if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 279                                         "CONSOLE_FONT", &vc_font,
 280                                         "CONSOLE_SCREENMAP", &vc_font_map,
 281                                         "CONSOLE_UNICODEMAP", &vc_font_unimap,
 282                                         NULL)) < 0) {
 283
 284                         if (r != -ENOENT)
 285                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 286                 }
 287
 288 #elif defined(TARGET_ARCH)
 289                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 290                                         "KEYMAP", &vc_keymap,
 291                                         "CONSOLEFONT", &vc_font,
 292                                         "CONSOLEMAP", &vc_font_map,
 293                                         NULL)) < 0) {
 294
 295                         if (r != -ENOENT)
 296                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 297                 }
 298
 299 #elif defined(TARGET_FRUGALWARE)
 300                 if ((r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
 301                                         "keymap", &vc_keymap,
 302                                         NULL)) < 0) {
 303                         if (r != -ENOENT)
 304                                 log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
 305                 }
 306                 if ((r = parse_env_file("/etc/sysconfig/font", NEWLINE,
 307                                         "font", &vc_font,
 308                                         NULL)) < 0) {
 309                         if (r != -ENOENT)
 310                                 log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
 311                 }
 312
 313 #elif defined(TARGET_ALTLINUX)
 314                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 315                                         "KEYTABLE", &vc_keymap,
 316                                         NULL)) < 0) {
 317
 318                         if (r != -ENOENT)
 319                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 320                 }
 321
 322                 if ((r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 323                                         "SYSFONT", &vc_font,
 324                                         NULL)) < 0) {
 325
 326                         if (r != -ENOENT)
 327                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 328                 }
 329
 330 #elif defined(TARGET_GENTOO)
 331                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 332                                         "unicode", &vc_unicode,
 333                                         NULL)) < 0) {
 334                         if (r != -ENOENT)
 335                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 336                 }
 337
 338                 if (vc_unicode) {
 339                         int rc_unicode;
 340
 341                         if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
 342                                 log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 343                         else {
 344                                 if (rc_unicode && !utf8)
 345                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 346                                 else if (!rc_unicode && utf8) {
 347                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 348                                         utf8 = false;
 349                                 }
 350                         }
 351                 }
 352
 353                 /* /etc/conf.d/consolefont comments and gentoo
 354                  * documentation mention uppercase, but the actual
 355                  * contents are lowercase.  the existing
 356                  * /etc/init.d/consolefont tries both
 357                  */
 358                 if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 359                                         "CONSOLEFONT", &vc_font,
 360                                         "consolefont", &vc_font,
 361                                         "consoletranslation", &vc_font_map,
 362                                         "CONSOLETRANSLATION", &vc_font_map,
 363                                         "unicodemap", &vc_font_unimap,
 364                                         "UNICODEMAP", &vc_font_unimap,
 365                                         NULL)) < 0) {
 366                         if (r != -ENOENT)
 367                                 log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 368                 }
 369
 370                 if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 371                                         "keymap", &vc_keymap,
 372                                         "KEYMAP", &vc_keymap,
 373                                         NULL)) < 0) {
 374                         if (r != -ENOENT)
 375                                 log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 376                 }
 377
 378 #elif defined(TARGET_MANDRIVA)
 379
 380                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 381                                         "SYSFONT", &vc_font,
 382                                         "SYSFONTACM", &vc_font_map,
 383                                         "UNIMAP", &vc_font_unimap,
 384                                         NULL)) < 0) {
 385
 386                         if (r != -ENOENT)
 387                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 388                 }
 389
 390                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 391                                         "KEYTABLE", &vc_keytable,
 392                                         "KEYMAP", &vc_keymap,
 393                                         "UNIKEYTABLE", &vc_keymap,
 394                                         "GRP_TOGGLE", &vc_keymap_toggle,
 395                                         NULL)) < 0) {
 396
 397                         if (r != -ENOENT)
 398                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 399                 }
 400
 401                 if (vc_keytable) {
 402                         if (vc_keymap)
 403                                 free(vc_keymap);
 404                         if (utf8) {
 405                                 if (endswith(vc_keytable, ".uni") || strstr(vc_keytable, ".uni."))
 406                                         vc_keymap = strdup(vc_keytable);
 407                                 else {
 408                                         char *s;
 409                                         if ((s = strstr(vc_keytable, ".map")))
 410                                                 vc_keytable[s-vc_keytable+1] = '\0';
 411                                         vc_keymap = strappend(vc_keytable, ".uni");
 412                                 }
 413                         } else
 414                                 vc_keymap = strdup(vc_keytable);
 415
 416                         free(vc_keytable);
 417
 418                         if (!vc_keymap) {
 419                                 log_error("Out of memory.");
 420                                 goto finish;
 421                         }
 422                 }
 423
 424                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 425                         char *t;
 426
 427                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 428                                 log_error("Out of memory.");
 429                                 goto finish;
 430                         }
 431
 432                         free(vc_keymap);
 433                         vc_keymap = t;
 434                 }
 435 #endif
 436         }
 437
 438         r = EXIT_FAILURE;
 439
 440         if (!utf8)
 441                 disable_utf8(fd);
 442
 443         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 444             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 445                 r = EXIT_SUCCESS;
 446
 447 finish:
 448         if (keymap_pid > 0)
 449                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 450
 451         if (font_pid > 0)
 452                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 453
 454         free(vc_keymap);
 455         free(vc_font);
 456         free(vc_font_map);
 457         free(vc_font_unimap);
 458
 459         if (fd >= 0)
 460                 close_nointr_nofail(fd);
 461
 462         return r;
 463 }