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         k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "0");
  74         if (k < 0)
  75                 r = k;
  76
  77         if (r < 0)
  78                 log_warning("Failed to disable UTF-8: %s", strerror(-r));
  79
  80         return r;
  81 }
  82
  83 static int enable_utf8(int fd) {
  84         int r = 0, k;
  85
  86         if (ioctl(fd, KDSKBMODE, K_UNICODE) < 0)
  87                 r = -errno;
  88
  89         if (loop_write(fd, "\033%G", 3, false) < 0)
  90                 r = -errno;
  91
  92         k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "1");
  93         if (k < 0)
  94                 r = k;
  95
  96         if (r < 0)
  97                 log_warning("Failed to enable UTF-8: %s", strerror(-r));
  98
  99         return r;
 100 }
 101
 102 static int load_keymap(const char *vc, const char *map, const char *map_toggle, bool utf8, pid_t *_pid) {
 103         const char *args[8];
 104         int i = 0;
 105         pid_t pid;
 106
 107         if (isempty(map)) {
 108                 /* An empty map means kernel map */
 109                 *_pid = 0;
 110                 return 0;
 111         }
 112
 113         args[i++] = KBD_LOADKEYS;
 114         args[i++] = "-q";
 115         args[i++] = "-C";
 116         args[i++] = vc;
 117         if (utf8)
 118                 args[i++] = "-u";
 119         args[i++] = map;
 120         if (map_toggle)
 121                 args[i++] = map_toggle;
 122         args[i++] = NULL;
 123
 124         pid = fork();
 125         if (pid < 0) {
 126                 log_error("Failed to fork: %m");
 127                 return -errno;
 128         } else if (pid == 0) {
 129                 execv(args[0], (char **) args);
 130                 _exit(EXIT_FAILURE);
 131         }
 132
 133         *_pid = pid;
 134         return 0;
 135 }
 136
 137 static int load_font(const char *vc, const char *font, const char *map, const char *unimap, pid_t *_pid) {
 138         const char *args[9];
 139         int i = 0;
 140         pid_t pid;
 141
 142         if (isempty(font)) {
 143                 /* An empty font means kernel font */
 144                 *_pid = 0;
 145                 return 0;
 146         }
 147
 148         args[i++] = KBD_SETFONT;
 149         args[i++] = "-C";
 150         args[i++] = vc;
 151         args[i++] = font;
 152         if (map) {
 153                 args[i++] = "-m";
 154                 args[i++] = map;
 155         }
 156         if (unimap) {
 157                 args[i++] = "-u";
 158                 args[i++] = unimap;
 159         }
 160         args[i++] = NULL;
 161
 162         pid = fork();
 163         if (pid < 0) {
 164                 log_error("Failed to fork: %m");
 165                 return -errno;
 166         } else if (pid == 0) {
 167                 execv(args[0], (char **) args);
 168                 _exit(EXIT_FAILURE);
 169         }
 170
 171         *_pid = pid;
 172         return 0;
 173 }
 174
 175 int main(int argc, char **argv) {
 176         const char *vc;
 177         char *vc_keymap = NULL;
 178         char *vc_keymap_toggle = NULL;
 179         char *vc_font = NULL;
 180         char *vc_font_map = NULL;
 181         char *vc_font_unimap = NULL;
 182 #ifdef TARGET_GENTOO
 183         char *vc_unicode = NULL;
 184 #endif
 185 #if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
 186         char *vc_keytable = NULL;
 187 #endif
 188         int fd = -1;
 189         bool utf8;
 190         int r = EXIT_FAILURE;
 191         pid_t font_pid = 0, keymap_pid = 0;
 192
 193         log_set_target(LOG_TARGET_AUTO);
 194         log_parse_environment();
 195         log_open();
 196
 197         umask(0022);
 198
 199         if (argv[1])
 200                 vc = argv[1];
 201         else
 202                 vc = "/dev/tty0";
 203
 204         fd = open_terminal(vc, O_RDWR|O_CLOEXEC);
 205         if (fd < 0) {
 206                 log_error("Failed to open %s: %m", vc);
 207                 goto finish;
 208         }
 209
 210         if (!is_vconsole(fd)) {
 211                 log_error("Device %s is not a virtual console.", vc);
 212                 goto finish;
 213         }
 214
 215         utf8 = is_locale_utf8();
 216
 217         r = 0;
 218
 219         if (detect_container(NULL) <= 0) {
 220                 r = parse_env_file("/proc/cmdline", WHITESPACE,
 221                                    "vconsole.keymap", &vc_keymap,
 222                                    "vconsole.keymap.toggle", &vc_keymap_toggle,
 223                                    "vconsole.font", &vc_font,
 224                                    "vconsole.font.map", &vc_font_map,
 225                                    "vconsole.font.unimap", &vc_font_unimap,
 226                                    NULL);
 227
 228                 if (r < 0 && r != -ENOENT)
 229                         log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 230         }
 231
 232         /* Hmm, nothing set on the kernel cmd line? Then let's
 233          * try /etc/vconsole.conf */
 234         if (r <= 0) {
 235                 r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 236                                    "KEYMAP", &vc_keymap,
 237                                    "KEYMAP_TOGGLE", &vc_keymap_toggle,
 238                                    "FONT", &vc_font,
 239                                    "FONT_MAP", &vc_font_map,
 240                                    "FONT_UNIMAP", &vc_font_unimap,
 241                                    NULL);
 242
 243                 if (r < 0 && r != -ENOENT)
 244                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 245         }
 246
 247         if (r <= 0) {
 248 #if defined(TARGET_FEDORA)
 249                 r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 250                                    "SYSFONT", &vc_font,
 251                                    "SYSFONTACM", &vc_font_map,
 252                                    "UNIMAP", &vc_font_unimap,
 253                                    NULL);
 254                 if (r < 0 && r != -ENOENT)
 255                         log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 256
 257                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 258                                    "KEYTABLE", &vc_keymap,
 259                                    "KEYMAP", &vc_keymap,
 260                                    NULL);
 261                 if (r < 0 && r != -ENOENT)
 262                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 263
 264                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 265                         char *t;
 266
 267                         t = strdup("/etc/sysconfig/console/default.kmap");
 268                         if (!t) {
 269                                 log_oom();
 270                                 goto finish;
 271                         }
 272
 273                         free(vc_keymap);
 274                         vc_keymap = t;
 275                 }
 276
 277 #elif defined(TARGET_SUSE)
 278                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 279                                    "KEYTABLE", &vc_keymap,
 280                                    NULL);
 281                 if (r < 0 && r != -ENOENT)
 282                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 283
 284                 r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 285                                    "CONSOLE_FONT", &vc_font,
 286                                    "CONSOLE_SCREENMAP", &vc_font_map,
 287                                    "CONSOLE_UNICODEMAP", &vc_font_unimap,
 288                                    NULL);
 289                 if (r < 0 && r != -ENOENT)
 290                         log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 291
 292 #elif defined(TARGET_ARCH)
 293                 r = parse_env_file("/etc/rc.conf", NEWLINE,
 294                                    "KEYMAP", &vc_keymap,
 295                                    "CONSOLEFONT", &vc_font,
 296                                    "CONSOLEMAP", &vc_font_map,
 297                                    NULL);
 298                 if (r < 0 && r != -ENOENT)
 299                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 300
 301 #elif defined(TARGET_FRUGALWARE)
 302                 r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
 303                                    "keymap", &vc_keymap,
 304                                    NULL);
 305                 if (r < 0 && r != -ENOENT)
 306                         log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
 307
 308                 r = parse_env_file("/etc/sysconfig/font", NEWLINE,
 309                                    "font", &vc_font,
 310                                    NULL);
 311                 if (r < 0 && r != -ENOENT)
 312                         log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
 313
 314 #elif defined(TARGET_ALTLINUX)
 315                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 316                                    "KEYTABLE", &vc_keymap,
 317                                    NULL)
 318                 if (r < 0 && r != -ENOENT)
 319                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 320
 321                 r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 322                                    "SYSFONT", &vc_font,
 323                                    NULL);
 324                 if (r < 0 && r != -ENOENT)
 325                         log_warning("Failed to read /etc/sysconfig/consolefont: %s", strerror(-r));
 326
 327 #elif defined(TARGET_GENTOO)
 328                 r = parse_env_file("/etc/rc.conf", NEWLINE,
 329                                    "unicode", &vc_unicode,
 330                                    NULL);
 331                 if (r < 0 && r != -ENOENT)
 332                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 333
 334                 if (vc_unicode) {
 335                         int rc_unicode;
 336
 337                         rc_unicode = parse_boolean(vc_unicode);
 338                         if (rc_unicode < 0)
 339                                 log_warning("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                 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);
 363                 if (r < 0 && r != -ENOENT)
 364                         log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 365
 366                 r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 367                                    "keymap", &vc_keymap,
 368                                    "KEYMAP", &vc_keymap,
 369                                    NULL);
 370                 if (r < 0 && r != -ENOENT)
 371                         log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 372
 373 #elif defined(TARGET_MANDRIVA) || defined (TARGET_MAGEIA)
 374
 375                 r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 376                                    "SYSFONT", &vc_font,
 377                                    "SYSFONTACM", &vc_font_map,
 378                                    "UNIMAP", &vc_font_unimap,
 379                                    NULL);
 380                 if (r < 0 && r != -ENOENT)
 381                         log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 382
 383                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 384                                    "KEYTABLE", &vc_keytable,
 385                                    "KEYMAP", &vc_keymap,
 386                                    "UNIKEYTABLE", &vc_keymap,
 387                                    "GRP_TOGGLE", &vc_keymap_toggle,
 388                                    NULL);
 389                 if (r < 0 && r != -ENOENT)
 390                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 391
 392                 if (vc_keytable) {
 393                         free(vc_keymap);
 394                         if (utf8) {
 395                                 if (endswith(vc_keytable, ".uni") || strstr(vc_keytable, ".uni."))
 396                                         vc_keymap = strdup(vc_keytable);
 397                                 else {
 398                                         char *s;
 399                                         s = strstr(vc_keytable, ".map");
 400                                         if (s)
 401                                                 vc_keytable[s-vc_keytable+1] = '\0';
 402                                         vc_keymap = strappend(vc_keytable, ".uni");
 403                                 }
 404                         } else
 405                                 vc_keymap = strdup(vc_keytable);
 406
 407                         free(vc_keytable);
 408
 409                         if (!vc_keymap) {
 410                                 log_oom();
 411                                 goto finish;
 412                         }
 413                 }
 414
 415                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 416                         char *t;
 417
 418                         t = strdup("/etc/sysconfig/console/default.kmap");
 419                         if (!t) {
 420                                 log_oom();
 421                                 goto finish;
 422                         }
 423
 424                         free(vc_keymap);
 425                         vc_keymap = t;
 426                 }
 427 #endif
 428         }
 429
 430         r = EXIT_FAILURE;
 431
 432         if (utf8)
 433                 enable_utf8(fd);
 434         else
 435                 disable_utf8(fd);
 436
 437
 438         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 439             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 440                 r = EXIT_SUCCESS;
 441
 442 finish:
 443         if (keymap_pid > 0)
 444                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 445
 446         if (font_pid > 0)
 447                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 448
 449         free(vc_keymap);
 450         free(vc_font);
 451         free(vc_font_map);
 452         free(vc_font_unimap);
 453
 454         if (fd >= 0)
 455                 close_nointr_nofail(fd);
 456
 457         return r;
 458 }