src/vconsole/vconsole-setup.c - systemd-stable - Rivoreo Source Code Repositories

 /*-*- 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 Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser 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 <fcntl.h>
 #include <stdbool.h>
 #include <limits.h>
 #include <sys/ioctl.h>
 #include <linux/tiocl.h>
 #include <linux/kd.h>
 #include <linux/vt.h>

 #include "util.h"
 #include "log.h"
 #include "virt.h"
 #include "fileio.h"
 #include "process-util.h"
 #include "terminal-util.h"
 #include "signal-util.h"

 static bool is_vconsole(int fd) {
         unsigned char data[1];

         data[0] = TIOCL_GETFGCONSOLE;
         return ioctl(fd, TIOCLINUX, data) >= 0;
 }

 static int disable_utf8(int fd) {
         int r = 0, k;

         if (ioctl(fd, KDSKBMODE, K_XLATE) < 0)
                 r = -errno;

         k = loop_write(fd, "\033%@", 3, false);
         if (k < 0)
                 r = k;

         k = write_string_file("/sys/module/vt/parameters/default_utf8", "0", 0);
         if (k < 0)
                 r = k;

         if (r < 0)
                 log_warning_errno(r, "Failed to disable UTF-8: %m");

         return r;
 }

 static int enable_utf8(int fd) {
         int r = 0, k;
         long current = 0;

         if (ioctl(fd, KDGKBMODE, &current) < 0 || current == K_XLATE) {
                 /*
                  * Change the current keyboard to unicode, unless it
                  * is currently in raw or off mode anyway. We
                  * shouldn't interfere with X11's processing of the
                  * key events.
                  *
                  * http://lists.freedesktop.org/archives/systemd-devel/2013-February/008573.html
                  *
                  */

                 if (ioctl(fd, KDSKBMODE, K_UNICODE) < 0)
                         r = -errno;
         }

         k = loop_write(fd, "\033%G", 3, false);
         if (k < 0)
                 r = k;

         k = write_string_file("/sys/module/vt/parameters/default_utf8", "1", 0);
         if (k < 0)
                 r = k;

         if (r < 0)
                 log_warning_errno(r, "Failed to enable UTF-8: %m");

         return r;
 }

 static int keyboard_load_and_wait(const char *vc, const char *map, const char *map_toggle, bool utf8) {
         const char *args[8];
         int i = 0, r;
         pid_t pid;

         /* An empty map means kernel map */
         if (isempty(map))
                 return 1;

         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;

         pid = fork();
         if (pid < 0)
                 return log_error_errno(errno, "Failed to fork: %m");
         else if (pid == 0) {

                 (void) reset_all_signal_handlers();
                 (void) reset_signal_mask();

                 execv(args[0], (char **) args);
                 _exit(EXIT_FAILURE);
         }

         r = wait_for_terminate_and_warn(KBD_LOADKEYS, pid, true);
         if (r < 0)
                 return r;

         return r == 0;
 }

 static int font_load_and_wait(const char *vc, const char *font, const char *map, const char *unimap) {
         const char *args[9];
         int i = 0, r;
         pid_t pid;

         /* An empty font means kernel font */
         if (isempty(font))
                 return 1;

         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;

         pid = fork();
         if (pid < 0)
                 return log_error_errno(errno, "Failed to fork: %m");
         else if (pid == 0) {

                 (void) reset_all_signal_handlers();
                 (void) reset_signal_mask();

                 execv(args[0], (char **) args);
                 _exit(EXIT_FAILURE);
         }

         r = wait_for_terminate_and_warn(KBD_SETFONT, pid, true);
         if (r < 0)
                 return r;

         return r == 0;
 }

 /*
  * A newly allocated VT uses the font from the active VT. Here
  * we update all possibly already allocated VTs with the configured
  * font. It also allows to restart systemd-vconsole-setup.service,
  * to apply a new font to all VTs.
  */
 static void font_copy_to_all_vcs(int fd) {
         struct vt_stat vcs = {};
         unsigned char map8[E_TABSZ];
         unsigned short map16[E_TABSZ];
         struct unimapdesc unimapd;
         struct unipair unipairs[USHRT_MAX];
         int i, r;

         /* get active, and 16 bit mask of used VT numbers */
         r = ioctl(fd, VT_GETSTATE, &vcs);
         if (r < 0) {
                 log_debug_errno(errno, "VT_GETSTATE failed, ignoring: %m");
                 return;
         }

         for (i = 1; i <= 15; i++) {
                 char vcname[strlen("/dev/vcs") + DECIMAL_STR_MAX(int)];
                 _cleanup_close_ int vcfd = -1;
                 struct console_font_op cfo = {};

                 if (i == vcs.v_active)
                         continue;

                 /* skip non-allocated ttys */
                 snprintf(vcname, sizeof(vcname), "/dev/vcs%i", i);
                 if (access(vcname, F_OK) < 0)
                         continue;

                 snprintf(vcname, sizeof(vcname), "/dev/tty%i", i);
                 vcfd = open_terminal(vcname, O_RDWR|O_CLOEXEC);
                 if (vcfd < 0)
                         continue;

                 /* copy font from active VT, where the font was uploaded to */
                 cfo.op = KD_FONT_OP_COPY;
                 cfo.height = vcs.v_active-1; /* tty1 == index 0 */
                 (void) ioctl(vcfd, KDFONTOP, &cfo);

                 /* copy map of 8bit chars */
                 if (ioctl(fd, GIO_SCRNMAP, map8) >= 0)
                         (void) ioctl(vcfd, PIO_SCRNMAP, map8);

                 /* copy map of 8bit chars -> 16bit Unicode values */
                 if (ioctl(fd, GIO_UNISCRNMAP, map16) >= 0)
                         (void) ioctl(vcfd, PIO_UNISCRNMAP, map16);

                 /* copy unicode translation table */
                 /* unimapd is a ushort count and a pointer to an
                    array of struct unipair { ushort, ushort } */
                 unimapd.entries  = unipairs;
                 unimapd.entry_ct = USHRT_MAX;
                 if (ioctl(fd, GIO_UNIMAP, &unimapd) >= 0) {
                         struct unimapinit adv = { 0, 0, 0 };

                         (void) ioctl(vcfd, PIO_UNIMAPCLR, &adv);
                         (void) ioctl(vcfd, PIO_UNIMAP, &unimapd);
                 }
         }
 }

 int main(int argc, char **argv) {
         const char *vc;
         _cleanup_free_ char
                 *vc_keymap = NULL, *vc_keymap_toggle = NULL,
                 *vc_font = NULL, *vc_font_map = NULL, *vc_font_unimap = NULL;
         _cleanup_close_ int fd = -1;
         bool utf8, font_copy = false, font_ok, keyboard_ok;
         int r = EXIT_FAILURE;

         log_set_target(LOG_TARGET_AUTO);
         log_parse_environment();
         log_open();

         umask(0022);

         if (argv[1])
                 vc = argv[1];
         else {
                 vc = "/dev/tty0";
                 font_copy = true;
         }

         fd = open_terminal(vc, O_RDWR|O_CLOEXEC);
         if (fd < 0) {
                 log_error_errno(errno, "Failed to open %s: %m", vc);
                 return EXIT_FAILURE;
         }

         if (!is_vconsole(fd)) {
                 log_error("Device %s is not a virtual console.", vc);
                 return EXIT_FAILURE;
         }

         utf8 = is_locale_utf8();

         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);

         if (r < 0 && r != -ENOENT)
                 log_warning_errno(r, "Failed to read /etc/vconsole.conf: %m");

         /* Let the kernel command line override /etc/vconsole.conf */
         if (detect_container(NULL) <= 0) {
                 r = parse_env_file("/proc/cmdline", WHITESPACE,
                                    "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);

                 if (r < 0 && r != -ENOENT)
                         log_warning_errno(r, "Failed to read /proc/cmdline: %m");
         }

         if (utf8)
                 (void) enable_utf8(fd);
         else
                 (void) disable_utf8(fd);

         font_ok = font_load_and_wait(vc, vc_font, vc_font_map, vc_font_unimap) > 0;
         keyboard_ok = keyboard_load_and_wait(vc, vc_keymap, vc_keymap_toggle, utf8) > 0;

         /* Only copy the font when we executed setfont successfully */
         if (font_copy && font_ok)
                 (void) font_copy_to_all_vcs(fd);

         return font_ok && keyboard_ok ? EXIT_SUCCESS : EXIT_FAILURE;
 }
	/-- 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 Lesser General Public License as published by
	the Free Software Foundation; either version 2.1 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
	Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser 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 <fcntl.h>
	#include <stdbool.h>
	#include <limits.h>
	#include <sys/ioctl.h>
	#include <linux/tiocl.h>
	#include <linux/kd.h>
	#include <linux/vt.h>

	#include "util.h"
	#include "log.h"
	#include "virt.h"
	#include "fileio.h"
	#include "process-util.h"
	#include "terminal-util.h"
	#include "signal-util.h"

	static bool is_vconsole(int fd) {
	unsigned char data[1];

	data[0] = TIOCL_GETFGCONSOLE;
	return ioctl(fd, TIOCLINUX, data) >= 0;
	}

	static int disable_utf8(int fd) {
	int r = 0, k;

	if (ioctl(fd, KDSKBMODE, K_XLATE) < 0)
	r = -errno;

	k = loop_write(fd, "\033%@", 3, false);
	if (k < 0)
	r = k;

	k = write_string_file("/sys/module/vt/parameters/default_utf8", "0", 0);
	if (k < 0)
	r = k;

	if (r < 0)
	log_warning_errno(r, "Failed to disable UTF-8: %m");

	return r;
	}

	static int enable_utf8(int fd) {
	int r = 0, k;
	long current = 0;

	if (ioctl(fd, KDGKBMODE, &current) < 0 \|\| current == K_XLATE) {
	/*
	* Change the current keyboard to unicode, unless it
	* is currently in raw or off mode anyway. We
	* shouldn't interfere with X11's processing of the
	* key events.
	*
	* http://lists.freedesktop.org/archives/systemd-devel/2013-February/008573.html
	*
	*/

	if (ioctl(fd, KDSKBMODE, K_UNICODE) < 0)
	r = -errno;
	}

	k = loop_write(fd, "\033%G", 3, false);
	if (k < 0)
	r = k;

	k = write_string_file("/sys/module/vt/parameters/default_utf8", "1", 0);
	if (k < 0)
	r = k;

	if (r < 0)
	log_warning_errno(r, "Failed to enable UTF-8: %m");

	return r;
	}

	static int keyboard_load_and_wait(const char vc, const char map, const char *map_toggle, bool utf8) {
	const char *args[8];
	int i = 0, r;
	pid_t pid;

	/* An empty map means kernel map */
	if (isempty(map))
	return 1;

	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;

	pid = fork();
	if (pid < 0)
	return log_error_errno(errno, "Failed to fork: %m");
	else if (pid == 0) {

	(void) reset_all_signal_handlers();
	(void) reset_signal_mask();

	execv(args[0], (char **) args);
	_exit(EXIT_FAILURE);
	}

	r = wait_for_terminate_and_warn(KBD_LOADKEYS, pid, true);
	if (r < 0)
	return r;

	return r == 0;
	}

	static int font_load_and_wait(const char vc, const char font, const char map, const char unimap) {
	const char *args[9];
	int i = 0, r;
	pid_t pid;

	/* An empty font means kernel font */
	if (isempty(font))
	return 1;

	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;

	pid = fork();
	if (pid < 0)
	return log_error_errno(errno, "Failed to fork: %m");
	else if (pid == 0) {

	(void) reset_all_signal_handlers();
	(void) reset_signal_mask();

	execv(args[0], (char **) args);
	_exit(EXIT_FAILURE);
	}

	r = wait_for_terminate_and_warn(KBD_SETFONT, pid, true);
	if (r < 0)
	return r;

	return r == 0;
	}

	/*
	* A newly allocated VT uses the font from the active VT. Here
	* we update all possibly already allocated VTs with the configured
	* font. It also allows to restart systemd-vconsole-setup.service,
	* to apply a new font to all VTs.
	*/
	static void font_copy_to_all_vcs(int fd) {
	struct vt_stat vcs = {};
	unsigned char map8[E_TABSZ];
	unsigned short map16[E_TABSZ];
	struct unimapdesc unimapd;
	struct unipair unipairs[USHRT_MAX];
	int i, r;

	/* get active, and 16 bit mask of used VT numbers */
	r = ioctl(fd, VT_GETSTATE, &vcs);
	if (r < 0) {
	log_debug_errno(errno, "VT_GETSTATE failed, ignoring: %m");
	return;
	}

	for (i = 1; i <= 15; i++) {
	char vcname[strlen("/dev/vcs") + DECIMAL_STR_MAX(int)];
	_cleanup_close_ int vcfd = -1;
	struct console_font_op cfo = {};

	if (i == vcs.v_active)
	continue;

	/* skip non-allocated ttys */
	snprintf(vcname, sizeof(vcname), "/dev/vcs%i", i);
	if (access(vcname, F_OK) < 0)
	continue;

	snprintf(vcname, sizeof(vcname), "/dev/tty%i", i);
	vcfd = open_terminal(vcname, O_RDWR\|O_CLOEXEC);
	if (vcfd < 0)
	continue;

	/* copy font from active VT, where the font was uploaded to */
	cfo.op = KD_FONT_OP_COPY;
	cfo.height = vcs.v_active-1; /* tty1 == index 0 */
	(void) ioctl(vcfd, KDFONTOP, &cfo);

	/* copy map of 8bit chars */
	if (ioctl(fd, GIO_SCRNMAP, map8) >= 0)
	(void) ioctl(vcfd, PIO_SCRNMAP, map8);

	/* copy map of 8bit chars -> 16bit Unicode values */
	if (ioctl(fd, GIO_UNISCRNMAP, map16) >= 0)
	(void) ioctl(vcfd, PIO_UNISCRNMAP, map16);

	/* copy unicode translation table */
	/* unimapd is a ushort count and a pointer to an
	array of struct unipair { ushort, ushort } */
	unimapd.entries = unipairs;
	unimapd.entry_ct = USHRT_MAX;
	if (ioctl(fd, GIO_UNIMAP, &unimapd) >= 0) {
	struct unimapinit adv = { 0, 0, 0 };

	(void) ioctl(vcfd, PIO_UNIMAPCLR, &adv);
	(void) ioctl(vcfd, PIO_UNIMAP, &unimapd);
	}
	}
	}

	int main(int argc, char **argv) {
	const char *vc;
	_cleanup_free_ char
	vc_keymap = NULL, vc_keymap_toggle = NULL,
	vc_font = NULL, vc_font_map = NULL, *vc_font_unimap = NULL;
	_cleanup_close_ int fd = -1;
	bool utf8, font_copy = false, font_ok, keyboard_ok;
	int r = EXIT_FAILURE;

	log_set_target(LOG_TARGET_AUTO);
	log_parse_environment();
	log_open();

	umask(0022);

	if (argv[1])
	vc = argv[1];
	else {
	vc = "/dev/tty0";
	font_copy = true;
	}

	fd = open_terminal(vc, O_RDWR\|O_CLOEXEC);
	if (fd < 0) {
	log_error_errno(errno, "Failed to open %s: %m", vc);
	return EXIT_FAILURE;
	}

	if (!is_vconsole(fd)) {
	log_error("Device %s is not a virtual console.", vc);
	return EXIT_FAILURE;
	}

	utf8 = is_locale_utf8();

	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);

	if (r < 0 && r != -ENOENT)
	log_warning_errno(r, "Failed to read /etc/vconsole.conf: %m");

	/* Let the kernel command line override /etc/vconsole.conf */
	if (detect_container(NULL) <= 0) {
	r = parse_env_file("/proc/cmdline", WHITESPACE,
	"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);

	if (r < 0 && r != -ENOENT)
	log_warning_errno(r, "Failed to read /proc/cmdline: %m");
	}

	if (utf8)
	(void) enable_utf8(fd);
	else
	(void) disable_utf8(fd);

	font_ok = font_load_and_wait(vc, vc_font, vc_font_map, vc_font_unimap) > 0;
	keyboard_ok = keyboard_load_and_wait(vc, vc_keymap, vc_keymap_toggle, utf8) > 0;

	/* Only copy the font when we executed setfont successfully */
	if (font_copy && font_ok)
	(void) font_copy_to_all_vcs(fd);

	return font_ok && keyboard_ok ? EXIT_SUCCESS : EXIT_FAILURE;
	}