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         vc_keymap = strdup("us");
 218
 219         if (!vc_keymap) {
 220                 log_error("Failed to allocate string.");
 221                 goto finish;
 222         }
 223
 224         r = 0;
 225
 226         if (detect_container(NULL) <= 0) {
 227                 r = parse_env_file("/proc/cmdline", WHITESPACE,
 228                                    "vconsole.keymap", &vc_keymap,
 229                                    "vconsole.keymap.toggle", &vc_keymap_toggle,
 230                                    "vconsole.font", &vc_font,
 231                                    "vconsole.font.map", &vc_font_map,
 232                                    "vconsole.font.unimap", &vc_font_unimap,
 233                                    NULL);
 234
 235                 if (r < 0 && r != -ENOENT)
 236                         log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 237         }
 238
 239         /* Hmm, nothing set on the kernel cmd line? Then let's
 240          * try /etc/vconsole.conf */
 241         if (r <= 0) {
 242                 r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 243                                    "KEYMAP", &vc_keymap,
 244                                    "KEYMAP_TOGGLE", &vc_keymap_toggle,
 245                                    "FONT", &vc_font,
 246                                    "FONT_MAP", &vc_font_map,
 247                                    "FONT_UNIMAP", &vc_font_unimap,
 248                                    NULL);
 249
 250                 if (r < 0 && r != -ENOENT)
 251                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 252         }
 253
 254         if (r <= 0) {
 255 #if defined(TARGET_FEDORA)
 256                 r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 257                                    "SYSFONT", &vc_font,
 258                                    "SYSFONTACM", &vc_font_map,
 259                                    "UNIMAP", &vc_font_unimap,
 260                                    NULL);
 261                 if (r < 0 && r != -ENOENT)
 262                         log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 263
 264                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 265                                    "KEYTABLE", &vc_keymap,
 266                                    "KEYMAP", &vc_keymap,
 267                                    NULL);
 268                 if (r < 0 && r != -ENOENT)
 269                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 270
 271                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 272                         char *t;
 273
 274                         t = strdup("/etc/sysconfig/console/default.kmap");
 275                         if (!t) {
 276                                 log_oom();
 277                                 goto finish;
 278                         }
 279
 280                         free(vc_keymap);
 281                         vc_keymap = t;
 282                 }
 283
 284 #elif defined(TARGET_SUSE)
 285                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 286                                    "KEYTABLE", &vc_keymap,
 287                                    NULL);
 288                 if (r < 0 && r != -ENOENT)
 289                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 290
 291                 r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 292                                    "CONSOLE_FONT", &vc_font,
 293                                    "CONSOLE_SCREENMAP", &vc_font_map,
 294                                    "CONSOLE_UNICODEMAP", &vc_font_unimap,
 295                                    NULL);
 296                 if (r < 0 && r != -ENOENT)
 297                         log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 298
 299 #elif defined(TARGET_ARCH)
 300                 r = parse_env_file("/etc/rc.conf", NEWLINE,
 301                                    "KEYMAP", &vc_keymap,
 302                                    "CONSOLEFONT", &vc_font,
 303                                    "CONSOLEMAP", &vc_font_map,
 304                                    NULL);
 305                 if (r < 0 && r != -ENOENT)
 306                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 307
 308 #elif defined(TARGET_FRUGALWARE)
 309                 r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
 310                                    "keymap", &vc_keymap,
 311                                    NULL);
 312                 if (r < 0 && r != -ENOENT)
 313                         log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
 314
 315                 r = parse_env_file("/etc/sysconfig/font", NEWLINE,
 316                                    "font", &vc_font,
 317                                    NULL);
 318                 if (r < 0 && r != -ENOENT)
 319                         log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
 320
 321 #elif defined(TARGET_ALTLINUX)
 322                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 323                                    "KEYTABLE", &vc_keymap,
 324                                    NULL)
 325                 if (r < 0 && r != -ENOENT)
 326                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 327
 328                 r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 329                                    "SYSFONT", &vc_font,
 330                                    NULL);
 331                 if (r < 0 && r != -ENOENT)
 332                         log_warning("Failed to read /etc/sysconfig/consolefont: %s", strerror(-r));
 333
 334 #elif defined(TARGET_GENTOO)
 335                 r = parse_env_file("/etc/rc.conf", NEWLINE,
 336                                    "unicode", &vc_unicode,
 337                                    NULL);
 338                 if (r < 0 && r != -ENOENT)
 339                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 340
 341                 if (vc_unicode) {
 342                         int rc_unicode;
 343
 344                         rc_unicode = parse_boolean(vc_unicode);
 345                         if (rc_unicode < 0)
 346                                 log_warning("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 347                         else {
 348                                 if (rc_unicode && !utf8)
 349                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 350                                 else if (!rc_unicode && utf8) {
 351                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 352                                         utf8 = false;
 353                                 }
 354                         }
 355                 }
 356
 357                 /* /etc/conf.d/consolefont comments and gentoo
 358                  * documentation mention uppercase, but the actual
 359                  * contents are lowercase.  the existing
 360                  * /etc/init.d/consolefont tries both
 361                  */
 362                 r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 363                                    "CONSOLEFONT", &vc_font,
 364                                    "consolefont", &vc_font,
 365                                    "consoletranslation", &vc_font_map,
 366                                    "CONSOLETRANSLATION", &vc_font_map,
 367                                    "unicodemap", &vc_font_unimap,
 368                                    "UNICODEMAP", &vc_font_unimap,
 369                                    NULL);
 370                 if (r < 0 && r != -ENOENT)
 371                         log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 372
 373                 r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 374                                    "keymap", &vc_keymap,
 375                                    "KEYMAP", &vc_keymap,
 376                                    NULL);
 377                 if (r < 0 && r != -ENOENT)
 378                         log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 379
 380 #elif defined(TARGET_MANDRIVA) || defined (TARGET_MAGEIA)
 381
 382                 r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 383                                    "SYSFONT", &vc_font,
 384                                    "SYSFONTACM", &vc_font_map,
 385                                    "UNIMAP", &vc_font_unimap,
 386                                    NULL);
 387                 if (r < 0 && r != -ENOENT)
 388                         log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 389
 390                 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);
 396                 if (r < 0 && r != -ENOENT)
 397                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 398
 399                 if (vc_keytable) {
 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                                         s = strstr(vc_keytable, ".map");
 407                                         if (s)
 408                                                 vc_keytable[s-vc_keytable+1] = '\0';
 409                                         vc_keymap = strappend(vc_keytable, ".uni");
 410                                 }
 411                         } else
 412                                 vc_keymap = strdup(vc_keytable);
 413
 414                         free(vc_keytable);
 415
 416                         if (!vc_keymap) {
 417                                 log_oom();
 418                                 goto finish;
 419                         }
 420                 }
 421
 422                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 423                         char *t;
 424
 425                         t = strdup("/etc/sysconfig/console/default.kmap");
 426                         if (!t) {
 427                                 log_oom();
 428                                 goto finish;
 429                         }
 430
 431                         free(vc_keymap);
 432                         vc_keymap = t;
 433                 }
 434 #endif
 435         }
 436
 437         r = EXIT_FAILURE;
 438
 439         if (utf8)
 440                 enable_utf8(fd);
 441         else
 442                 disable_utf8(fd);
 443
 444
 445         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 446             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 447                 r = EXIT_SUCCESS;
 448
 449 finish:
 450         if (keymap_pid > 0)
 451                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 452
 453         if (font_pid > 0)
 454                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 455
 456         free(vc_keymap);
 457         free(vc_font);
 458         free(vc_font_map);
 459         free(vc_font_unimap);
 460
 461         if (fd >= 0)
 462                 close_nointr_nofail(fd);
 463
 464         return r;
 465 }