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         int fd = -1;
 151         bool utf8;
 152         int r = EXIT_FAILURE;
 153         pid_t font_pid = 0, keymap_pid = 0;
 154
 155         log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
 156         log_parse_environment();
 157         log_open();
 158
 159         if (argv[1])
 160                 vc = argv[1];
 161         else
 162                 vc = "/dev/tty0";
 163
 164         if ((fd = open(vc, O_RDWR|O_CLOEXEC)) < 0) {
 165                 log_error("Failed to open %s: %m", vc);
 166                 goto finish;
 167         }
 168
 169         if (!is_vconsole(fd)) {
 170                 log_error("Device %s is not a virtual console.", vc);
 171                 goto finish;
 172         }
 173
 174         utf8 = is_locale_utf8();
 175
 176         if ((r = parse_env_file("/proc/cmdline", WHITESPACE,
 177 #ifdef TARGET_FEDORA
 178                                 "SYSFONT", &vc_font,
 179                                 "KEYTABLE", &vc_keymap,
 180 #endif
 181                                 "vconsole.keymap", &vc_keymap,
 182                                 "vconsole.keymap.toggle", &vc_keymap_toggle,
 183                                 "vconsole.font", &vc_font,
 184                                 "vconsole.font.map", &vc_font_map,
 185                                 "vconsole.font.unimap", &vc_font_unimap,
 186                                 NULL)) < 0) {
 187
 188                 if (r != -ENOENT)
 189                         log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 190         }
 191
 192         /* Hmm, nothing set on the kernel cmd line? Then let's
 193          * try /etc/vconsole.conf */
 194         if (r <= 0 &&
 195             (r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 196                                 "KEYMAP", &vc_keymap,
 197                                 "KEYMAP_TOGGLE", &vc_keymap_toggle,
 198                                 "FONT", &vc_font,
 199                                 "FONT_MAP", &vc_font_map,
 200                                 "FONT_UNIMAP", &vc_font_unimap,
 201                                 NULL)) < 0) {
 202
 203                 if (r != -ENOENT)
 204                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 205         }
 206
 207         if (r <= 0) {
 208 #ifdef TARGET_FEDORA
 209                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 210                                         "SYSFONT", &vc_font,
 211                                         "SYSFONTACM", &vc_font_map,
 212                                         "UNIMAP", &vc_font_unimap,
 213                                         NULL)) < 0) {
 214
 215                         if (r != -ENOENT)
 216                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 217                 }
 218
 219                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 220                                         "KEYTABLE", &vc_keymap,
 221                                         "KEYMAP", &vc_keymap,
 222                                         NULL)) < 0) {
 223
 224                         if (r != -ENOENT)
 225                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 226                 }
 227
 228                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 229                         char *t;
 230
 231                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 232                                 log_error("Out of memory.");
 233                                 goto finish;
 234                         }
 235
 236                         free(vc_keymap);
 237                         vc_keymap = t;
 238                 }
 239
 240 #elif defined(TARGET_SUSE)
 241                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 242                                         "KEYTABLE", &vc_keymap,
 243                                         NULL)) < 0) {
 244
 245                         if (r != -ENOENT)
 246                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 247                 }
 248
 249                 if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 250                                         "CONSOLE_FONT", &vc_font,
 251                                         "CONSOLE_SCREENMAP", &vc_font_map,
 252                                         "CONSOLE_UNICODEMAP", &vc_font_unimap,
 253                                         NULL)) < 0) {
 254
 255                         if (r != -ENOENT)
 256                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 257                 }
 258
 259 #elif defined(TARGET_ARCH)
 260                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 261                                         "KEYMAP", &vc_keymap,
 262                                         "CONSOLEFONT", &vc_font,
 263                                         "CONSOLEMAP", &vc_font_map,
 264                                         NULL)) < 0) {
 265
 266                         if (r != -ENOENT)
 267                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 268                 }
 269
 270 #elif defined(TARGET_FRUGALWARE)
 271                 if ((r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
 272                                         "keymap", &vc_keymap,
 273                                         NULL)) < 0) {
 274                         if (r != -ENOENT)
 275                                 log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
 276                 }
 277                 if ((r = parse_env_file("/etc/sysconfig/font", NEWLINE,
 278                                         "font", &vc_font,
 279                                         NULL)) < 0) {
 280                         if (r != -ENOENT)
 281                                 log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
 282                 }
 283
 284 #elif defined(TARGET_ALTLINUX)
 285                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 286                                         "KEYTABLE", &vc_keymap,
 287                                         NULL)) < 0) {
 288
 289                         if (r != -ENOENT)
 290                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 291                 }
 292
 293                 if ((r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
 294                                         "SYSFONT", &vc_font,
 295                                         NULL)) < 0) {
 296
 297                         if (r != -ENOENT)
 298                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 299                 }
 300
 301 #elif defined(TARGET_GENTOO)
 302                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 303                                         "unicode", &vc_unicode,
 304                                         NULL)) < 0) {
 305                         if (r != -ENOENT)
 306                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 307                 }
 308
 309                 if (vc_unicode) {
 310                         int rc_unicode;
 311
 312                         if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
 313                                 log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 314                         else {
 315                                 if (rc_unicode && !utf8)
 316                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 317                                 else if (!rc_unicode && utf8) {
 318                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 319                                         utf8 = false;
 320                                 }
 321                         }
 322                 }
 323
 324                 /* /etc/conf.d/consolefont comments and gentoo
 325                  * documentation mention uppercase, but the actual
 326                  * contents are lowercase.  the existing
 327                  * /etc/init.d/consolefont tries both
 328                  */
 329                 if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 330                                         "CONSOLEFONT", &vc_font,
 331                                         "consolefont", &vc_font,
 332                                         "consoletranslation", &vc_font_map,
 333                                         "CONSOLETRANSLATION", &vc_font_map,
 334                                         "unicodemap", &vc_font_unimap,
 335                                         "UNICODEMAP", &vc_font_unimap,
 336                                         NULL)) < 0) {
 337                         if (r != -ENOENT)
 338                                 log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 339                 }
 340
 341                 if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 342                                         "keymap", &vc_keymap,
 343                                         "KEYMAP", &vc_keymap,
 344                                         NULL)) < 0) {
 345                         if (r != -ENOENT)
 346                                 log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 347                 }
 348 #endif
 349         }
 350
 351         if (!vc_keymap)
 352                 vc_keymap = strdup("us");
 353         if (!vc_font)
 354                 vc_font = strdup(DEFAULT_FONT);
 355
 356         if (!vc_keymap || !vc_font) {
 357                 log_error("Failed to allocate strings.");
 358                 goto finish;
 359         }
 360
 361         if (!utf8)
 362                 disable_utf8(fd);
 363
 364         if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
 365             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 366                 r = EXIT_SUCCESS;
 367
 368 finish:
 369         if (keymap_pid > 0)
 370                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 371
 372         if (font_pid > 0)
 373                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 374
 375         free(vc_keymap);
 376         free(vc_font);
 377         free(vc_font_map);
 378         free(vc_font_unimap);
 379
 380         if (fd >= 0)
 381                 close_nointr_nofail(fd);
 382
 383         return r;
 384 }