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 <sys/ioctl.h>
  33 #include <sys/wait.h>
  34 #include <linux/tiocl.h>
  35 #include <linux/kd.h>
  36
  37 #include "util.h"
  38 #include "log.h"
  39 #include "macro.h"
  40 #include "virt.h"
  41
  42 static bool is_vconsole(int fd) {
  43         unsigned char data[1];
  44
  45         data[0] = TIOCL_GETFGCONSOLE;
  46         return ioctl(fd, TIOCLINUX, data) >= 0;
  47 }
  48
  49 static int disable_utf8(int fd) {
  50         int r = 0, k;
  51
  52         if (ioctl(fd, KDSKBMODE, K_XLATE) < 0)
  53                 r = -errno;
  54
  55         if (loop_write(fd, "\033%@", 3, false) < 0)
  56                 r = -errno;
  57
  58         k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "0");
  59         if (k < 0)
  60                 r = k;
  61
  62         if (r < 0)
  63                 log_warning("Failed to disable UTF-8: %s", strerror(-r));
  64
  65         return r;
  66 }
  67
  68 static int enable_utf8(int fd) {
  69         int r = 0, k;
  70
  71         if (ioctl(fd, KDSKBMODE, K_UNICODE) < 0)
  72                 r = -errno;
  73
  74         if (loop_write(fd, "\033%G", 3, false) < 0)
  75                 r = -errno;
  76
  77         k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "1");
  78         if (k < 0)
  79                 r = k;
  80
  81         if (r < 0)
  82                 log_warning("Failed to enable UTF-8: %s", strerror(-r));
  83
  84         return r;
  85 }
  86
  87 static int load_keymap(const char *vc, const char *map, const char *map_toggle, bool utf8, pid_t *_pid) {
  88         const char *args[8];
  89         int i = 0;
  90         pid_t pid;
  91
  92         if (isempty(map)) {
  93                 /* An empty map means kernel map */
  94                 *_pid = 0;
  95                 return 0;
  96         }
  97
  98         args[i++] = KBD_LOADKEYS;
  99         args[i++] = "-q";
 100         args[i++] = "-C";
 101         args[i++] = vc;
 102         if (utf8)
 103                 args[i++] = "-u";
 104         args[i++] = map;
 105         if (map_toggle)
 106                 args[i++] = map_toggle;
 107         args[i++] = NULL;
 108
 109         pid = fork();
 110         if (pid < 0) {
 111                 log_error("Failed to fork: %m");
 112                 return -errno;
 113         } else if (pid == 0) {
 114                 execv(args[0], (char **) args);
 115                 _exit(EXIT_FAILURE);
 116         }
 117
 118         *_pid = pid;
 119         return 0;
 120 }
 121
 122 static int load_font(const char *vc, const char *font, const char *map, const char *unimap, pid_t *_pid) {
 123         const char *args[9];
 124         int i = 0;
 125         pid_t pid;
 126
 127         if (isempty(font)) {
 128                 /* An empty font means kernel font */
 129                 *_pid = 0;
 130                 return 0;
 131         }
 132
 133         args[i++] = KBD_SETFONT;
 134         args[i++] = "-C";
 135         args[i++] = vc;
 136         args[i++] = font;
 137         if (map) {
 138                 args[i++] = "-m";
 139                 args[i++] = map;
 140         }
 141         if (unimap) {
 142                 args[i++] = "-u";
 143                 args[i++] = unimap;
 144         }
 145         args[i++] = NULL;
 146
 147         pid = fork();
 148         if (pid < 0) {
 149                 log_error("Failed to fork: %m");
 150                 return -errno;
 151         } else if (pid == 0) {
 152                 execv(args[0], (char **) args);
 153                 _exit(EXIT_FAILURE);
 154         }
 155
 156         *_pid = pid;
 157         return 0;
 158 }
 159
 160 int main(int argc, char **argv) {
 161         const char *vc;
 162         char *vc_keymap = NULL;
 163         char *vc_keymap_toggle = NULL;
 164         char *vc_font = NULL;
 165         char *vc_font_map = NULL;
 166         char *vc_font_unimap = NULL;
 167 #ifdef TARGET_GENTOO
 168         char *vc_unicode = NULL;
 169 #endif
 170 #if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
 171         char *vc_keytable = NULL;
 172 #endif
 173         int fd = -1;
 174         bool utf8;
 175         int r = EXIT_FAILURE;
 176         pid_t font_pid = 0, keymap_pid = 0;
 177
 178         log_set_target(LOG_TARGET_AUTO);
 179         log_parse_environment();
 180         log_open();
 181
 182         umask(0022);
 183
 184         if (argv[1])
 185                 vc = argv[1];
 186         else
 187                 vc = "/dev/tty0";
 188
 189         fd = open_terminal(vc, O_RDWR|O_CLOEXEC);
 190         if (fd < 0) {
 191                 log_error("Failed to open %s: %m", vc);
 192                 goto finish;
 193         }
 194
 195         if (!is_vconsole(fd)) {
 196                 log_error("Device %s is not a virtual console.", vc);
 197                 goto finish;
 198         }
 199
 200         utf8 = is_locale_utf8();
 201
 202         r = 0;
 203
 204         if (detect_container(NULL) <= 0) {
 205                 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);
 212
 213                 if (r < 0 && 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);
 227
 228                 if (r < 0 && r != -ENOENT)
 229                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 230         }
 231
 232         if (r <= 0) {
 233 #if defined(TARGET_SUSE)
 234                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 235                                    "KEYTABLE", &vc_keymap,
 236                                    NULL);
 237                 if (r < 0 && r != -ENOENT)
 238                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 239
 240                 r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 241                                    "CONSOLE_FONT", &vc_font,
 242                                    "CONSOLE_SCREENMAP", &vc_font_map,
 243                                    "CONSOLE_UNICODEMAP", &vc_font_unimap,
 244                                    NULL);
 245                 if (r < 0 && r != -ENOENT)
 246                         log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 247
 248 #elif defined(TARGET_ALTLINUX)
 249                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 250                                    "KEYTABLE", &vc_keymap,
 251                                    NULL)
 252                 if (r < 0 && r != -ENOENT)
 253                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 254
 255                 r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 256                                    "SYSFONT", &vc_font,
 257                                    NULL);
 258                 if (r < 0 && r != -ENOENT)
 259                         log_warning("Failed to read /etc/sysconfig/consolefont: %s", strerror(-r));
 260
 261 #elif defined(TARGET_GENTOO)
 262                 r = parse_env_file("/etc/rc.conf", NEWLINE,
 263                                    "unicode", &vc_unicode,
 264                                    NULL);
 265                 if (r < 0 && r != -ENOENT)
 266                         log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 267
 268                 if (vc_unicode) {
 269                         int rc_unicode;
 270
 271                         rc_unicode = parse_boolean(vc_unicode);
 272                         if (rc_unicode < 0)
 273                                 log_warning("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 274                         else {
 275                                 if (rc_unicode && !utf8)
 276                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 277                                 else if (!rc_unicode && utf8) {
 278                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 279                                         utf8 = false;
 280                                 }
 281                         }
 282                 }
 283
 284                 /* /etc/conf.d/consolefont comments and gentoo
 285                  * documentation mention uppercase, but the actual
 286                  * contents are lowercase.  the existing
 287                  * /etc/init.d/consolefont tries both
 288                  */
 289                 r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 290                                    "CONSOLEFONT", &vc_font,
 291                                    "consolefont", &vc_font,
 292                                    "consoletranslation", &vc_font_map,
 293                                    "CONSOLETRANSLATION", &vc_font_map,
 294                                    "unicodemap", &vc_font_unimap,
 295                                    "UNICODEMAP", &vc_font_unimap,
 296                                    NULL);
 297                 if (r < 0 && r != -ENOENT)
 298                         log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 299
 300                 r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 301                                    "keymap", &vc_keymap,
 302                                    "KEYMAP", &vc_keymap,
 303                                    NULL);
 304                 if (r < 0 && r != -ENOENT)
 305                         log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 306
 307 #elif defined(TARGET_MANDRIVA) || defined (TARGET_MAGEIA)
 308
 309                 r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 310                                    "SYSFONT", &vc_font,
 311                                    "SYSFONTACM", &vc_font_map,
 312                                    "UNIMAP", &vc_font_unimap,
 313                                    NULL);
 314                 if (r < 0 && r != -ENOENT)
 315                         log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 316
 317                 r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 318                                    "KEYTABLE", &vc_keytable,
 319                                    "KEYMAP", &vc_keymap,
 320                                    "UNIKEYTABLE", &vc_keymap,
 321                                    "GRP_TOGGLE", &vc_keymap_toggle,
 322                                    NULL);
 323                 if (r < 0 && r != -ENOENT)
 324                         log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 325
 326                 if (vc_keytable) {
 327                         free(vc_keymap);
 328                         if (utf8) {
 329                                 if (endswith(vc_keytable, ".uni") || strstr(vc_keytable, ".uni."))
 330                                         vc_keymap = strdup(vc_keytable);
 331                                 else {
 332                                         char *s;
 333                                         s = strstr(vc_keytable, ".map");
 334                                         if (s)
 335                                                 vc_keytable[s-vc_keytable+1] = '\0';
 336                                         vc_keymap = strappend(vc_keytable, ".uni");
 337                                 }
 338                         } else
 339                                 vc_keymap = strdup(vc_keytable);
 340
 341                         free(vc_keytable);
 342
 343                         if (!vc_keymap) {
 344                                 log_oom();
 345                                 goto finish;
 346                         }
 347                 }
 348
 349                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 350                         char *t;
 351
 352                         t = strdup("/etc/sysconfig/console/default.kmap");
 353                         if (!t) {
 354                                 log_oom();
 355                                 goto finish;
 356                         }
 357
 358                         free(vc_keymap);
 359                         vc_keymap = t;
 360                 }
 361 #endif
 362         }
 363
 364         r = EXIT_FAILURE;
 365
 366         if (utf8)
 367                 enable_utf8(fd);
 368         else
 369                 disable_utf8(fd);
 370
 371
 372         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 373             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 374                 r = EXIT_SUCCESS;
 375
 376 finish:
 377         if (keymap_pid > 0)
 378                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 379
 380         if (font_pid > 0)
 381                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 382
 383         free(vc_keymap);
 384         free(vc_font);
 385         free(vc_font_map);
 386         free(vc_font_unimap);
 387
 388         if (fd >= 0)
 389                 close_nointr_nofail(fd);
 390
 391         return r;
 392 }