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, bool utf8, pid_t *_pid) {
  82         const char *args[7];
  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         args[i++] = NULL;
  94
  95         if ((pid = fork()) < 0) {
  96                 log_error("Failed to fork: %m");
  97                 return -errno;
  98         } else if (pid == 0) {
  99                 execv(args[0], (char **) args);
 100                 _exit(EXIT_FAILURE);
 101         }
 102
 103         *_pid = pid;
 104         return 0;
 105 }
 106
 107 static int load_font(const char *vc, const char *font, const char *map, const char *unimap, pid_t *_pid) {
 108         const char *args[9];
 109         int i = 0;
 110         pid_t pid;
 111
 112         args[i++] = KBD_SETFONT;
 113         args[i++] = "-C";
 114         args[i++] = vc;
 115         args[i++] = font;
 116         if (map) {
 117                 args[i++] = "-m";
 118                 args[i++] = map;
 119         }
 120         if (unimap) {
 121                 args[i++] = "-u";
 122                 args[i++] = unimap;
 123         }
 124         args[i++] = NULL;
 125
 126         if ((pid = fork()) < 0) {
 127                 log_error("Failed to fork: %m");
 128                 return -errno;
 129         } else if (pid == 0) {
 130                 execv(args[0], (char **) args);
 131                 _exit(EXIT_FAILURE);
 132         }
 133
 134         *_pid = pid;
 135         return 0;
 136 }
 137
 138 int main(int argc, char **argv) {
 139         const char *vc;
 140         char *vc_keymap = NULL;
 141         char *vc_font = NULL;
 142         char *vc_font_map = NULL;
 143         char *vc_font_unimap = NULL;
 144 #ifdef TARGET_GENTOO
 145         char *vc_unicode = NULL;
 146 #endif
 147         int fd = -1;
 148         bool utf8;
 149         int r = EXIT_FAILURE;
 150         pid_t font_pid = 0, keymap_pid = 0;
 151
 152         log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
 153         log_parse_environment();
 154         log_open();
 155
 156         if (argv[1])
 157                 vc = argv[1];
 158         else
 159                 vc = "/dev/tty0";
 160
 161         if ((fd = open(vc, O_RDWR|O_CLOEXEC)) < 0) {
 162                 log_error("Failed to open %s: %m", vc);
 163                 goto finish;
 164         }
 165
 166         if (!is_vconsole(fd)) {
 167                 log_error("Device %s is not a virtual console.", vc);
 168                 goto finish;
 169         }
 170
 171         utf8 = is_locale_utf8();
 172
 173         if ((r = parse_env_file("/proc/cmdline", WHITESPACE,
 174 #ifdef TARGET_FEDORA
 175                                 "SYSFONT", &vc_font,
 176                                 "KEYTABLE", &vc_keymap,
 177 #endif
 178                                 "vconsole.keymap", &vc_keymap,
 179                                 "vconsole.font", &vc_font,
 180                                 "vconsole.font.map", &vc_font_map,
 181                                 "vconsole.font.unimap", &vc_font_unimap,
 182                                 NULL)) < 0) {
 183
 184                 if (r != -ENOENT)
 185                         log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
 186         }
 187
 188         /* Hmm, nothing set on the kernel cmd line? Then let's
 189          * try /etc/vconsole.conf */
 190         if (r <= 0 &&
 191             (r = parse_env_file("/etc/vconsole.conf", NEWLINE,
 192                                 "KEYMAP", &vc_keymap,
 193                                 "FONT", &vc_font,
 194                                 "FONT_MAP", &vc_font_map,
 195                                 "FONT_UNIMAP", &vc_font_unimap,
 196                                 NULL)) < 0) {
 197
 198                 if (r != -ENOENT)
 199                         log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
 200         }
 201
 202         if (r <= 0) {
 203 #ifdef TARGET_FEDORA
 204                 if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
 205                                         "SYSFONT", &vc_font,
 206                                         "SYSFONTACM", &vc_font_map,
 207                                         "UNIMAP", &vc_font_unimap,
 208                                         NULL)) < 0) {
 209
 210                         if (r != -ENOENT)
 211                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 212                 }
 213
 214                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 215                                         "KEYTABLE", &vc_keymap,
 216                                         "KEYMAP", &vc_keymap,
 217                                         NULL)) < 0) {
 218
 219                         if (r != -ENOENT)
 220                                 log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
 221                 }
 222
 223                 if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
 224                         char *t;
 225
 226                         if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
 227                                 log_error("Out of memory.");
 228                                 goto finish;
 229                         }
 230
 231                         free(vc_keymap);
 232                         vc_keymap = t;
 233                 }
 234
 235 #elif defined(TARGET_SUSE)
 236                 if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
 237                                         "KEYTABLE", &vc_keymap,
 238                                         NULL)) < 0) {
 239
 240                         if (r != -ENOENT)
 241                                 log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
 242                 }
 243
 244                 if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
 245                                         "CONSOLE_FONT", &vc_font,
 246                                         "CONSOLE_SCREENMAP", &vc_font_map,
 247                                         "CONSOLE_UNICODEMAP", &vc_font_unimap,
 248                                         NULL)) < 0) {
 249
 250                         if (r != -ENOENT)
 251                                 log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
 252                 }
 253
 254 #elif defined(TARGET_ARCH)
 255                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 256                                         "KEYMAP", &vc_keymap,
 257                                         "CONSOLEFONT", &vc_font,
 258                                         "CONSOLEMAP", &vc_font_map,
 259                                         NULL)) < 0) {
 260
 261                         if (r != -ENOENT)
 262                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 263                 }
 264
 265 #elif defined(TARGET_GENTOO)
 266                 if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
 267                                         "unicode", &vc_unicode,
 268                                         NULL)) < 0) {
 269                         if (r != -ENOENT)
 270                                 log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
 271                 }
 272
 273                 if (vc_unicode) {
 274                         int rc_unicode;
 275
 276                         if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
 277                                 log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
 278                         else {
 279                                 if (rc_unicode && !utf8)
 280                                         log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
 281                                 else if (!rc_unicode && utf8) {
 282                                         log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
 283                                         utf8 = false;
 284                                 }
 285                         }
 286                 }
 287
 288                 /* /etc/conf.d/consolefont comments and gentoo
 289                  * documentation mention uppercase, but the actual
 290                  * contents are lowercase.  the existing
 291                  * /etc/init.d/consolefont tries both
 292                  */
 293                 if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
 294                                         "CONSOLEFONT", &vc_font,
 295                                         "consolefont", &vc_font,
 296                                         "consoletranslation", &vc_font_map,
 297                                         "CONSOLETRANSLATION", &vc_font_map,
 298                                         "unicodemap", &vc_font_unimap,
 299                                         "UNICODEMAP", &vc_font_unimap,
 300                                         NULL)) < 0) {
 301                         if (r != -ENOENT)
 302                                 log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
 303                 }
 304
 305                 if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
 306                                         "keymap", &vc_keymap,
 307                                         "KEYMAP", &vc_keymap,
 308                                         NULL)) < 0) {
 309                         if (r != -ENOENT)
 310                                 log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
 311                 }
 312 #endif
 313         }
 314
 315         if (!vc_keymap)
 316                 vc_keymap = strdup("us");
 317         if (!vc_font)
 318                 vc_font = strdup(DEFAULT_FONT);
 319
 320         if (!vc_keymap || !vc_font) {
 321                 log_error("Failed to allocate strings.");
 322                 goto finish;
 323         }
 324
 325         if (!utf8)
 326                 disable_utf8(fd);
 327
 328         if (load_keymap(vc, vc_keymap, utf8, &keymap_pid) >= 0 &&
 329             load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
 330                 r = EXIT_SUCCESS;
 331
 332 finish:
 333         if (keymap_pid > 0)
 334                 wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
 335
 336         if (font_pid > 0)
 337                 wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
 338
 339         free(vc_keymap);
 340         free(vc_font);
 341         free(vc_font_map);
 342         free(vc_font_unimap);
 343
 344         if (fd >= 0)
 345                 close_nointr_nofail(fd);
 346
 347         return r;
 348 }