summaryrefslogtreecommitdiff
path: root/src/systemd-vconsole/vconsole-setup.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/systemd-vconsole/vconsole-setup.c')
-rw-r--r--src/systemd-vconsole/vconsole-setup.c332
1 files changed, 332 insertions, 0 deletions
diff --git a/src/systemd-vconsole/vconsole-setup.c b/src/systemd-vconsole/vconsole-setup.c
new file mode 100644
index 0000000000..1118118450
--- /dev/null
+++ b/src/systemd-vconsole/vconsole-setup.c
@@ -0,0 +1,332 @@
+/***
+ 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 <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <linux/kd.h>
+#include <linux/tiocl.h>
+#include <linux/vt.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "io-util.h"
+#include "locale-util.h"
+#include "log.h"
+#include "process-util.h"
+#include "signal-util.h"
+#include "stdio-util.h"
+#include "string-util.h"
+#include "terminal-util.h"
+#include "util.h"
+#include "virt.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;
+ _cleanup_free_ struct unipair* unipairs = 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_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 */
+ xsprintf(vcname, "/dev/vcs%i", i);
+ if (access(vcname, F_OK) < 0)
+ continue;
+
+ xsprintf(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(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;
+ }
+
+ 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,
+ 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;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-10 08:01:36 +0000