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systemd/src/vconsole-setup.c

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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Kay Sievers
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdbool.h>
#include <stdarg.h>
#include <limits.h>
#include <locale.h>
#include <langinfo.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <linux/tiocl.h>
#include <linux/kd.h>
#include "util.h"
#include "log.h"
#include "macro.h"
static bool is_vconsole(int fd) {
unsigned char data[1];
data[0] = TIOCL_GETFGCONSOLE;
return ioctl(fd, TIOCLINUX, data) >= 0;
}
static bool is_locale_utf8(void) {
const char *set;
if (!setlocale(LC_ALL, ""))
return true;
set = nl_langinfo(CODESET);
if (!set)
return true;
return streq(set, "UTF-8");
}
static int disable_utf8(int fd) {
int r = 0, k;
if (ioctl(fd, KDSKBMODE, K_XLATE) < 0)
r = -errno;
if (loop_write(fd, "\033%@", 3, false) < 0)
r = -errno;
if ((k = write_one_line_file("/sys/module/vt/parameters/default_utf8", "0")) < 0)
r = k;
if (r < 0)
log_warning("Failed to disable UTF-8: %s", strerror(errno));
return r;
}
static int load_keymap(const char *vc, const char *map, const char *map_toggle, bool utf8, pid_t *_pid) {
const char *args[8];
int i = 0;
pid_t pid;
args[i++] = KBD_LOADKEYS;
args[i++] = "-q";
args[i++] = "-C";
args[i++] = vc;
if (utf8)
args[i++] = "-u";
args[i++] = map;
if (map_toggle)
args[i++] = map_toggle;
args[i++] = NULL;
if ((pid = fork()) < 0) {
log_error("Failed to fork: %m");
return -errno;
} else if (pid == 0) {
execv(args[0], (char **) args);
_exit(EXIT_FAILURE);
}
*_pid = pid;
return 0;
}
static int load_font(const char *vc, const char *font, const char *map, const char *unimap, pid_t *_pid) {
const char *args[9];
int i = 0;
pid_t pid;
args[i++] = KBD_SETFONT;
args[i++] = "-C";
args[i++] = vc;
args[i++] = font;
if (map) {
args[i++] = "-m";
args[i++] = map;
}
if (unimap) {
args[i++] = "-u";
args[i++] = unimap;
}
args[i++] = NULL;
if ((pid = fork()) < 0) {
log_error("Failed to fork: %m");
return -errno;
} else if (pid == 0) {
execv(args[0], (char **) args);
_exit(EXIT_FAILURE);
}
*_pid = pid;
return 0;
}
int main(int argc, char **argv) {
const char *vc;
char *vc_keymap = NULL;
char *vc_keymap_toggle = NULL;
char *vc_font = NULL;
char *vc_font_map = NULL;
char *vc_font_unimap = NULL;
#ifdef TARGET_GENTOO
char *vc_unicode = NULL;
#endif
int fd = -1;
bool utf8;
int r = EXIT_FAILURE;
pid_t font_pid = 0, keymap_pid = 0;
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_open();
if (argv[1])
vc = argv[1];
else
vc = "/dev/tty0";
if ((fd = open(vc, O_RDWR|O_CLOEXEC)) < 0) {
log_error("Failed to open %s: %m", vc);
goto finish;
}
if (!is_vconsole(fd)) {
log_error("Device %s is not a virtual console.", vc);
goto finish;
}
utf8 = is_locale_utf8();
if ((r = parse_env_file("/proc/cmdline", WHITESPACE,
#ifdef TARGET_FEDORA
"SYSFONT", &vc_font,
"KEYTABLE", &vc_keymap,
#endif
"vconsole.keymap", &vc_keymap,
"vconsole.keymap.toggle", &vc_keymap_toggle,
"vconsole.font", &vc_font,
"vconsole.font.map", &vc_font_map,
"vconsole.font.unimap", &vc_font_unimap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /proc/cmdline: %s", strerror(-r));
}
/* Hmm, nothing set on the kernel cmd line? Then let's
* try /etc/vconsole.conf */
if (r <= 0 &&
(r = parse_env_file("/etc/vconsole.conf", NEWLINE,
"KEYMAP", &vc_keymap,
"KEYMAP_TOGGLE", &vc_keymap_toggle,
"FONT", &vc_font,
"FONT_MAP", &vc_font_map,
"FONT_UNIMAP", &vc_font_unimap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/vconsole.conf: %s", strerror(-r));
}
if (r <= 0) {
#ifdef TARGET_FEDORA
if ((r = parse_env_file("/etc/sysconfig/i18n", NEWLINE,
"SYSFONT", &vc_font,
"SYSFONTACM", &vc_font_map,
"UNIMAP", &vc_font_unimap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
}
if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
"KEYTABLE", &vc_keymap,
"KEYMAP", &vc_keymap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/i18n: %s", strerror(-r));
}
if (access("/etc/sysconfig/console/default.kmap", F_OK) >= 0) {
char *t;
if (!(t = strdup("/etc/sysconfig/console/default.kmap"))) {
log_error("Out of memory.");
goto finish;
}
free(vc_keymap);
vc_keymap = t;
}
#elif defined(TARGET_SUSE)
if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
"KEYTABLE", &vc_keymap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
}
if ((r = parse_env_file("/etc/sysconfig/console", NEWLINE,
"CONSOLE_FONT", &vc_font,
"CONSOLE_SCREENMAP", &vc_font_map,
"CONSOLE_UNICODEMAP", &vc_font_unimap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
}
#elif defined(TARGET_ARCH)
if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
"KEYMAP", &vc_keymap,
"CONSOLEFONT", &vc_font,
"CONSOLEMAP", &vc_font_map,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
}
#elif defined(TARGET_FRUGALWARE)
if ((r = parse_env_file("/etc/sysconfig/keymap", NEWLINE,
"keymap", &vc_keymap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/keymap: %s", strerror(-r));
}
if ((r = parse_env_file("/etc/sysconfig/font", NEWLINE,
"font", &vc_font,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/font: %s", strerror(-r));
}
#elif defined(TARGET_ALTLINUX)
if ((r = parse_env_file("/etc/sysconfig/keyboard", NEWLINE,
"KEYTABLE", &vc_keymap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/keyboard: %s", strerror(-r));
}
if ((r = parse_env_file("/etc/sysconfig/consolefont", NEWLINE,
"SYSFONT", &vc_font,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/sysconfig/console: %s", strerror(-r));
}
#elif defined(TARGET_GENTOO)
if ((r = parse_env_file("/etc/rc.conf", NEWLINE,
"unicode", &vc_unicode,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/rc.conf: %s", strerror(-r));
}
if (vc_unicode) {
int rc_unicode;
if ((rc_unicode = parse_boolean(vc_unicode)) < 0)
log_error("Unknown value for /etc/rc.conf unicode=%s", vc_unicode);
else {
if (rc_unicode && !utf8)
log_warning("/etc/rc.conf wants unicode, but current locale is not UTF-8 capable!");
else if (!rc_unicode && utf8) {
log_debug("/etc/rc.conf does not want unicode, leave it on in kernel but does not apply to vconsole.");
utf8 = false;
}
}
}
/* /etc/conf.d/consolefont comments and gentoo
* documentation mention uppercase, but the actual
* contents are lowercase. the existing
* /etc/init.d/consolefont tries both
*/
if ((r = parse_env_file("/etc/conf.d/consolefont", NEWLINE,
"CONSOLEFONT", &vc_font,
"consolefont", &vc_font,
"consoletranslation", &vc_font_map,
"CONSOLETRANSLATION", &vc_font_map,
"unicodemap", &vc_font_unimap,
"UNICODEMAP", &vc_font_unimap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/conf.d/consolefont: %s", strerror(-r));
}
if ((r = parse_env_file("/etc/conf.d/keymaps", NEWLINE,
"keymap", &vc_keymap,
"KEYMAP", &vc_keymap,
NULL)) < 0) {
if (r != -ENOENT)
log_warning("Failed to read /etc/conf.d/keymaps: %s", strerror(-r));
}
#endif
}
if (!vc_keymap)
vc_keymap = strdup("us");
if (!vc_font)
vc_font = strdup(DEFAULT_FONT);
if (!vc_keymap || !vc_font) {
log_error("Failed to allocate strings.");
goto finish;
}
if (!utf8)
disable_utf8(fd);
if (load_keymap(vc, vc_keymap, vc_keymap_toggle, utf8, &keymap_pid) >= 0 &&
load_font(vc, vc_font, vc_font_map, vc_font_unimap, &font_pid) >= 0)
r = EXIT_SUCCESS;
finish:
if (keymap_pid > 0)
wait_for_terminate_and_warn(KBD_LOADKEYS, keymap_pid);
if (font_pid > 0)
wait_for_terminate_and_warn(KBD_SETFONT, font_pid);
free(vc_keymap);
free(vc_font);
free(vc_font_map);
free(vc_font_unimap);
if (fd >= 0)
close_nointr_nofail(fd);
return r;
}
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