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