src/vconsole/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 Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 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   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser 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 #if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
 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                                         "vconsole.keymap", &vc_keymap,
 207                                         "vconsole.keymap.toggle", &vc_keymap_toggle,
 208                                         "vconsole.font", &vc_font,
 209                                         "vconsole.font.map", &vc_font_map,
 210                                         "vconsole.font.unimap", &vc_font_unimap,
 211                                         NULL)) < 0) {
 212
 213                         if (r != -ENOENT)
 214                                 log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 215                 }
 216
 217         /* Hmm, nothing set on the kernel cmd line? Then let's
 218          * try /etc/vconsole.conf */
 219         if (r <= 0 &&
 220             (r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 221                                 "KEYMAP", &vc_keymap,
 222                                 "KEYMAP_TOGGLE", &vc_keymap_toggle,
 223                                 "FONT", &vc_font,
 224                                 "FONT_MAP", &vc_font_map,
 225                                 "FONT_UNIMAP", &vc_font_unimap,
 226                                 NULL)) < 0) {
 227
 228                 if (r != -ENOENT)
 229                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 230         }
 231
 232         if (r <= 0) {
 233 #if defined(TARGET_FEDORA) || defined(TARGET_MEEGO)
 234                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 235                                         "SYSFONT", &vc_font,
 236                                         "SYSFONTACM", &vc_font_map,
 237                                         "UNIMAP", &vc_font_unimap,
 238                                         NULL)) < 0) {
 239
 240                         if (r != -ENOENT)
 241                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 242                 }
 243
 244                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 245                                         "KEYTABLE", &vc_keymap,
 246                                         "KEYMAP", &vc_keymap,
 247                                         NULL)) < 0) {
 248
 249                         if (r != -ENOENT)
 250                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 251                 }
 252
 253                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 254                         char *t;
 255
 256                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 257                                 log_error("Out of memory.");
 258                                 goto finish;
 259                         }
 260
 261                         free(vc_keymap);
 262                         vc_keymap = t;
 263                 }
 264
 265 #elif defined(TARGET_SUSE)
 266                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 267                                         "KEYTABLE", &vc_keymap,
 268                                         NULL)) < 0) {
 269
 270                         if (r != -ENOENT)
 271                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 272                 }
 273
 274                 if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 275                                         "CONSOLE_FONT", &vc_font,
 276                                         "CONSOLE_SCREENMAP", &vc_font_map,
 277                                         "CONSOLE_UNICODEMAP", &vc_font_unimap,
 278                                         NULL)) < 0) {
 279
 280                         if (r != -ENOENT)
 281                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 282                 }
 283
 284 #elif defined(TARGET_ARCH)
 285                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 286                                         "KEYMAP", &vc_keymap,
 287                                         "CONSOLEFONT", &vc_font,
 288                                         "CONSOLEMAP", &vc_font_map,
 289                                         NULL)) < 0) {
 290
 291                         if (r != -ENOENT)
 292                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 293                 }
 294
 295 #elif defined(TARGET_FRUGALWARE)
 296                 if ((r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
 297                                         "keymap", &vc_keymap,
 298                                         NULL)) < 0) {
 299                         if (r != -ENOENT)
 300                                 log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
 301                 }
 302                 if ((r = parse_env_file("/etc/sysconfig/font", NEWLINE,
 303                                         "font", &vc_font,
 304                                         NULL)) < 0) {
 305                         if (r != -ENOENT)
 306                                 log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
 307                 }
 308
 309 #elif defined(TARGET_ALTLINUX)
 310                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 311                                         "KEYTABLE", &vc_keymap,
 312                                         NULL)) < 0) {
 313
 314                         if (r != -ENOENT)
 315                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 316                 }
 317
 318                 if ((r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 319                                         "SYSFONT", &vc_font,
 320                                         NULL)) < 0) {
 321
 322                         if (r != -ENOENT)
 323                                 log_warning("Failed to read /etc/sysconfig/consolefont: %s", strerror(-r));
 324                 }
 325
 326 #elif defined(TARGET_GENTOO)
 327                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 328                                         "unicode", &vc_unicode,
 329                                         NULL)) < 0) {
 330                         if (r != -ENOENT)
 331                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 332                 }
 333
 334                 if (vc_unicode) {
 335                         int rc_unicode;
 336
 337                         if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
 338                                 log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 339                         else {
 340                                 if (rc_unicode && !utf8)
 341                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 342                                 else if (!rc_unicode && utf8) {
 343                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 344                                         utf8 = false;
 345                                 }
 346                         }
 347                 }
 348
 349                 /* /etc/conf.d/consolefont comments and gentoo
 350                  * documentation mention uppercase, but the actual
 351                  * contents are lowercase.  the existing
 352                  * /etc/init.d/consolefont tries both
 353                  */
 354                 if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 355                                         "CONSOLEFONT", &vc_font,
 356                                         "consolefont", &vc_font,
 357                                         "consoletranslation", &vc_font_map,
 358                                         "CONSOLETRANSLATION", &vc_font_map,
 359                                         "unicodemap", &vc_font_unimap,
 360                                         "UNICODEMAP", &vc_font_unimap,
 361                                         NULL)) < 0) {
 362                         if (r != -ENOENT)
 363                                 log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 364                 }
 365
 366                 if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 367                                         "keymap", &vc_keymap,
 368                                         "KEYMAP", &vc_keymap,
 369                                         NULL)) < 0) {
 370                         if (r != -ENOENT)
 371                                 log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 372                 }
 373
 374 #elif defined(TARGET_MANDRIVA) || defined (TARGET_MAGEIA)
 375
 376                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 377                                         "SYSFONT", &vc_font,
 378                                         "SYSFONTACM", &vc_font_map,
 379                                         "UNIMAP", &vc_font_unimap,
 380                                         NULL)) < 0) {
 381
 382                         if (r != -ENOENT)
 383                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 384                 }
 385
 386                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 387                                         "KEYTABLE", &vc_keytable,
 388                                         "KEYMAP", &vc_keymap,
 389                                         "UNIKEYTABLE", &vc_keymap,
 390                                         "GRP_TOGGLE", &vc_keymap_toggle,
 391                                         NULL)) < 0) {
 392
 393                         if (r != -ENOENT)
 394                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 395                 }
 396
 397                 if (vc_keytable) {
 398                         if (vc_keymap)
 399                                 free(vc_keymap);
 400                         if (utf8) {
 401                                 if (endswith(vc_keytable, ".uni") || strstr(vc_keytable, ".uni."))
 402                                         vc_keymap = strdup(vc_keytable);
 403                                 else {
 404                                         char *s;
 405                                         if ((s = strstr(vc_keytable, ".map")))
 406                                                 vc_keytable[s-vc_keytable+1] = '\0';
 407                                         vc_keymap = strappend(vc_keytable, ".uni");
 408                                 }
 409                         } else
 410                                 vc_keymap = strdup(vc_keytable);
 411
 412                         free(vc_keytable);
 413
 414                         if (!vc_keymap) {
 415                                 log_error("Out of memory.");
 416                                 goto finish;
 417                         }
 418                 }
 419
 420                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 421                         char *t;
 422
 423                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 424                                 log_error("Out of memory.");
 425                                 goto finish;
 426                         }
 427
 428                         free(vc_keymap);
 429                         vc_keymap = t;
 430                 }
 431 #endif
 432         }
 433
 434         r = EXIT_FAILURE;
 435
 436         if (!utf8)
 437                 disable_utf8(fd);
 438
 439         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 440             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 441                 r = EXIT_SUCCESS;
 442
 443 finish:
 444         if (keymap_pid > 0)
 445                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 446
 447         if (font_pid > 0)
 448                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 449
 450         free(vc_keymap);
 451         free(vc_font);
 452         free(vc_font_map);
 453         free(vc_font_unimap);
 454
 455         if (fd >= 0)
 456                 close_nointr_nofail(fd);
 457
 458         return r;
 459 }