| /*** |
| 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 <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 <termios.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 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; |
| } |