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Diffstat (limited to 'src/grp-initprogs/systemd-vconsole-setup/vconsole-setup.c')
-rw-r--r--src/grp-initprogs/systemd-vconsole-setup/vconsole-setup.c412
1 files changed, 412 insertions, 0 deletions
diff --git a/src/grp-initprogs/systemd-vconsole-setup/vconsole-setup.c b/src/grp-initprogs/systemd-vconsole-setup/vconsole-setup.c
new file mode 100644
index 0000000000..ad6a4283fc
--- /dev/null
+++ b/src/grp-initprogs/systemd-vconsole-setup/vconsole-setup.c
@@ -0,0 +1,412 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2010 Kay Sievers
+ Copyright 2016 Michal Soltys <soltys@ziu.info>
+
+ 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 <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <termios.h>
+#include <unistd.h>
+
+#include <linux/kd.h>
+#include <linux/tiocl.h>
+#include <linux/vt.h>
+
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/fileio.h"
+#include "systemd-basic/io-util.h"
+#include "systemd-basic/locale-util.h"
+#include "systemd-basic/log.h"
+#include "systemd-basic/process-util.h"
+#include "systemd-basic/signal-util.h"
+#include "systemd-basic/stdio-util.h"
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/terminal-util.h"
+#include "systemd-basic/util.h"
+#include "systemd-basic/virt.h"
+
+static bool is_vconsole(int fd) {
+ unsigned char data[1];
+
+ data[0] = TIOCL_GETFGCONSOLE;
+ return ioctl(fd, TIOCLINUX, data) >= 0;
+}
+
+static bool is_allocated(unsigned int idx) {
+ char vcname[strlen("/dev/vcs") + DECIMAL_STR_MAX(int)];
+
+ xsprintf(vcname, "/dev/vcs%i", idx);
+ return access(vcname, F_OK) == 0;
+}
+
+static bool is_allocated_byfd(int fd) {
+ struct vt_stat vcs = {};
+
+ if (ioctl(fd, VT_GETSTATE, &vcs) < 0) {
+ log_warning_errno(errno, "VT_GETSTATE failed: %m");
+ return false;
+ }
+ return is_allocated(vcs.v_active);
+}
+
+static bool is_settable(int fd) {
+ int r, curr_mode;
+
+ r = ioctl(fd, KDGKBMODE, &curr_mode);
+ /*
+ * Make sure we only adjust consoles in K_XLATE or K_UNICODE mode.
+ * Otherwise we would (likely) interfere with X11's processing of the
+ * key events.
+ *
+ * http://lists.freedesktop.org/archives/systemd-devel/2013-February/008573.html
+ */
+ return r == 0 && IN_SET(curr_mode, K_XLATE, K_UNICODE);
+}
+
+static int toggle_utf8(const char *name, int fd, bool utf8) {
+ int r;
+ struct termios tc = {};
+
+ assert(name);
+
+ r = ioctl(fd, KDSKBMODE, utf8 ? K_UNICODE : K_XLATE);
+ if (r < 0)
+ return log_warning_errno(errno, "Failed to %s UTF-8 kbdmode on %s: %m", enable_disable(utf8), name);
+
+ r = loop_write(fd, utf8 ? "\033%G" : "\033%@", 3, false);
+ if (r < 0)
+ return log_warning_errno(r, "Failed to %s UTF-8 term processing on %s: %m", enable_disable(utf8), name);
+
+ r = tcgetattr(fd, &tc);
+ if (r >= 0) {
+ if (utf8)
+ tc.c_iflag |= IUTF8;
+ else
+ tc.c_iflag &= ~IUTF8;
+ r = tcsetattr(fd, TCSANOW, &tc);
+ }
+ if (r < 0)
+ return log_warning_errno(errno, "Failed to %s iutf8 flag on %s: %m", enable_disable(utf8), name);
+
+ log_debug("UTF-8 kbdmode %sd on %s", enable_disable(utf8), name);
+ return 0;
+}
+
+static int toggle_utf8_sysfs(bool utf8) {
+ int r;
+
+ r = write_string_file("/sys/module/vt/parameters/default_utf8", one_zero(utf8), 0);
+ if (r < 0)
+ return log_warning_errno(r, "Failed to %s sysfs UTF-8 flag: %m", enable_disable(utf8));
+
+ log_debug("Sysfs UTF-8 flag %sd", enable_disable(utf8));
+ return 0;
+}
+
+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;
+ pid_t pid;
+
+ /* An empty map means kernel map */
+ if (isempty(map))
+ return 0;
+
+ 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);
+ }
+
+ return wait_for_terminate_and_warn(KBD_LOADKEYS, pid, true);
+}
+
+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;
+ pid_t pid;
+
+ /* Any part can be set independently */
+ if (isempty(font) && isempty(map) && isempty(unimap))
+ return 0;
+
+ args[i++] = KBD_SETFONT;
+ args[i++] = "-C";
+ args[i++] = vc;
+ if (!isempty(map)) {
+ args[i++] = "-m";
+ args[i++] = map;
+ }
+ if (!isempty(unimap)) {
+ args[i++] = "-u";
+ args[i++] = unimap;
+ }
+ if (!isempty(font))
+ args[i++] = font;
+ 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);
+ }
+
+ return wait_for_terminate_and_warn(KBD_SETFONT, pid, true);
+}
+
+/*
+ * 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.
+ *
+ * We also setup per-console utf8 related stuff: kbdmode, term
+ * processing, stty iutf8.
+ */
+static void setup_remaining_vcs(int fd, bool utf8) {
+ struct console_font_op cfo = {
+ .op = KD_FONT_OP_GET,
+ .width = UINT_MAX, .height = UINT_MAX,
+ .charcount = UINT_MAX,
+ };
+ struct vt_stat vcs = {};
+ struct unimapinit adv = {};
+ struct unimapdesc unimapd;
+ _cleanup_free_ struct unipair* unipairs = NULL;
+ _cleanup_free_ void *fontbuf = NULL;
+ int i, r;
+
+ unipairs = new(struct unipair, USHRT_MAX);
+ if (!unipairs) {
+ log_oom();
+ return;
+ }
+
+ /* get active, and 16 bit mask of used VT numbers */
+ r = ioctl(fd, VT_GETSTATE, &vcs);
+ if (r < 0) {
+ log_warning_errno(errno, "VT_GETSTATE failed, ignoring remaining consoles: %m");
+ return;
+ }
+
+ /* get metadata of the current font (width, height, count) */
+ r = ioctl(fd, KDFONTOP, &cfo);
+ if (r < 0)
+ log_warning_errno(errno, "KD_FONT_OP_GET failed while trying to get the font metadata: %m");
+ else {
+ /* verify parameter sanity first */
+ if (cfo.width > 32 || cfo.height > 32 || cfo.charcount > 512)
+ log_warning("Invalid font metadata - width: %u (max 32), height: %u (max 32), count: %u (max 512)",
+ cfo.width, cfo.height, cfo.charcount);
+ else {
+ /*
+ * Console fonts supported by the kernel are limited in size to 32 x 32 and maximum 512
+ * characters. Thus with 1 bit per pixel it requires up to 65536 bytes. The height always
+ * requries 32 per glyph, regardless of the actual height - see the comment above #define
+ * max_font_size 65536 in drivers/tty/vt/vt.c for more details.
+ */
+ fontbuf = malloc((cfo.width + 7) / 8 * 32 * cfo.charcount);
+ if (!fontbuf) {
+ log_oom();
+ return;
+ }
+ /* get fonts from source console */
+ cfo.data = fontbuf;
+ r = ioctl(fd, KDFONTOP, &cfo);
+ if (r < 0)
+ log_warning_errno(errno, "KD_FONT_OP_GET failed while trying to read the font data: %m");
+ else {
+ unimapd.entries = unipairs;
+ unimapd.entry_ct = USHRT_MAX;
+ r = ioctl(fd, GIO_UNIMAP, &unimapd);
+ if (r < 0)
+ log_warning_errno(errno, "GIO_UNIMAP failed while trying to read unicode mappings: %m");
+ else
+ cfo.op = KD_FONT_OP_SET;
+ }
+ }
+ }
+
+ if (cfo.op != KD_FONT_OP_SET)
+ log_warning("Fonts will not be copied to remaining consoles");
+
+ for (i = 1; i <= 63; i++) {
+ char ttyname[strlen("/dev/tty") + DECIMAL_STR_MAX(int)];
+ _cleanup_close_ int fd_d = -1;
+
+ if (i == vcs.v_active || !is_allocated(i))
+ continue;
+
+ /* try to open terminal */
+ xsprintf(ttyname, "/dev/tty%i", i);
+ fd_d = open_terminal(ttyname, O_RDWR|O_CLOEXEC);
+ if (fd_d < 0) {
+ log_warning_errno(fd_d, "Unable to open tty%i, fonts will not be copied: %m", i);
+ continue;
+ }
+
+ if (!is_settable(fd_d))
+ continue;
+
+ toggle_utf8(ttyname, fd_d, utf8);
+
+ if (cfo.op != KD_FONT_OP_SET)
+ continue;
+
+ r = ioctl(fd_d, KDFONTOP, &cfo);
+ if (r < 0) {
+ log_warning_errno(errno, "KD_FONT_OP_SET failed, fonts will not be copied to tty%i: %m", i);
+ continue;
+ }
+
+ /* copy unicode translation table */
+ /* unimapd is a ushort count and a pointer to an
+ array of struct unipair { ushort, ushort } */
+ r = ioctl(fd_d, PIO_UNIMAPCLR, &adv);
+ if (r < 0) {
+ log_warning_errno(errno, "PIO_UNIMAPCLR failed, unimaps might be incorrect for tty%i: %m", i);
+ continue;
+ }
+
+ r = ioctl(fd_d, PIO_UNIMAP, &unimapd);
+ if (r < 0) {
+ log_warning_errno(errno, "PIO_UNIMAP failed, unimaps might be incorrect for tty%i: %m", i);
+ continue;
+ }
+
+ log_debug("Font and unimap successfully copied to %s", ttyname);
+ }
+}
+
+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(fd, "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;
+ }
+
+ if (!is_allocated_byfd(fd)) {
+ log_error("Virtual console %s is not allocated.", vc);
+ return EXIT_FAILURE;
+ }
+
+ if (!is_settable(fd)) {
+ log_error("Virtual console %s is not in K_XLATE or K_UNICODE.", 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() <= 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,
+ /* compatibility with obsolete multiple-dot scheme */
+ "vconsole.keymap.toggle", &vc_keymap_toggle,
+ "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");
+ }
+
+ toggle_utf8_sysfs(utf8);
+ toggle_utf8(vc, fd, utf8);
+ 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;
+
+ if (font_copy) {
+ if (font_ok)
+ setup_remaining_vcs(fd, utf8);
+ else
+ log_warning("Setting source virtual console failed, ignoring remaining ones");
+ }
+
+ return font_ok && keyboard_ok ? EXIT_SUCCESS : EXIT_FAILURE;
+}
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