| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| /*** |
| Copyright © 2016 Michal Soltys <soltys@ziu.info> |
| ***/ |
| |
| #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 <stdlib.h> |
| #include <sys/ioctl.h> |
| #include <sysexits.h> |
| #include <termios.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "env-file.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "io-util.h" |
| #include "locale-util.h" |
| #include "log.h" |
| #include "proc-cmdline.h" |
| #include "process-util.h" |
| #include "signal-util.h" |
| #include "stdio-util.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "terminal-util.h" |
| #include "util.h" |
| #include "virt.h" |
| |
| static int verify_vc_device(int fd) { |
| unsigned char data[] = { |
| TIOCL_GETFGCONSOLE, |
| }; |
| |
| int r; |
| |
| r = ioctl(fd, TIOCLINUX, data); |
| if (r < 0) |
| return -errno; |
| |
| return r; |
| } |
| |
| static int verify_vc_allocation(unsigned idx) { |
| char vcname[sizeof("/dev/vcs") + DECIMAL_STR_MAX(unsigned) - 2]; |
| |
| xsprintf(vcname, "/dev/vcs%u", idx); |
| |
| if (access(vcname, F_OK) < 0) |
| return -errno; |
| |
| return 0; |
| } |
| |
| static int verify_vc_allocation_byfd(int fd) { |
| struct vt_stat vcs = {}; |
| |
| if (ioctl(fd, VT_GETSTATE, &vcs) < 0) |
| return -errno; |
| |
| return verify_vc_allocation(vcs.v_active); |
| } |
| |
| static int verify_vc_kbmode(int fd) { |
| int 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 |
| */ |
| |
| if (ioctl(fd, KDGKBMODE, &curr_mode) < 0) |
| return -errno; |
| |
| return IN_SET(curr_mode, K_XLATE, K_UNICODE) ? 0 : -EBUSY; |
| } |
| |
| static int toggle_utf8_vc(const char *name, int fd, bool utf8) { |
| int r; |
| struct termios tc = {}; |
| |
| assert(name); |
| assert(fd >= 0); |
| |
| 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) { |
| SET_FLAG(tc.c_iflag, IUTF8, utf8); |
| 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), WRITE_STRING_FILE_DISABLE_BUFFER); |
| 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]; |
| unsigned i = 0; |
| pid_t pid; |
| int r; |
| |
| /* 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; |
| |
| if (DEBUG_LOGGING) { |
| _cleanup_free_ char *cmd = NULL; |
| |
| cmd = strv_join((char**) args, " "); |
| log_debug("Executing \"%s\"...", strnull(cmd)); |
| } |
| |
| r = safe_fork("(loadkeys)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pid); |
| if (r < 0) |
| return r; |
| if (r == 0) { |
| execv(args[0], (char **) args); |
| _exit(EXIT_FAILURE); |
| } |
| |
| return wait_for_terminate_and_check(KBD_LOADKEYS, pid, WAIT_LOG); |
| } |
| |
| static int font_load_and_wait(const char *vc, const char *font, const char *map, const char *unimap) { |
| const char *args[9]; |
| unsigned i = 0; |
| pid_t pid; |
| int r; |
| |
| /* 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; |
| |
| if (DEBUG_LOGGING) { |
| _cleanup_free_ char *cmd = NULL; |
| |
| cmd = strv_join((char**) args, " "); |
| log_debug("Executing \"%s\"...", strnull(cmd)); |
| } |
| |
| r = safe_fork("(setfont)", FORK_RESET_SIGNALS|FORK_CLOSE_ALL_FDS|FORK_RLIMIT_NOFILE_SAFE|FORK_LOG, &pid); |
| if (r < 0) |
| return r; |
| if (r == 0) { |
| execv(args[0], (char **) args); |
| _exit(EXIT_FAILURE); |
| } |
| |
| return wait_for_terminate_and_check(KBD_SETFONT, pid, WAIT_LOG); |
| } |
| |
| /* |
| * A newly allocated VT uses the font from the source 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 src_fd, unsigned src_idx, bool utf8) { |
| struct console_font_op cfo = { |
| .op = KD_FONT_OP_GET, |
| .width = UINT_MAX, .height = UINT_MAX, |
| .charcount = UINT_MAX, |
| }; |
| struct unimapinit adv = {}; |
| struct unimapdesc unimapd; |
| _cleanup_free_ struct unipair* unipairs = NULL; |
| _cleanup_free_ void *fontbuf = NULL; |
| unsigned i; |
| int log_level; |
| int r; |
| |
| unipairs = new(struct unipair, USHRT_MAX); |
| if (!unipairs) { |
| log_oom(); |
| return; |
| } |
| |
| log_level = LOG_WARNING; |
| |
| /* get metadata of the current font (width, height, count) */ |
| r = ioctl(src_fd, KDFONTOP, &cfo); |
| if (r < 0) { |
| /* We might be called to operate on the dummy console (to setup keymap |
| * mainly) when fbcon deferred takeover is used for example. In such case, |
| * setting font is not supported and is expected to fail. */ |
| if (errno == ENOSYS) |
| log_level = LOG_DEBUG; |
| |
| log_full_errno(log_level, 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 |
| * requires 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_multiply((cfo.width + 7) / 8 * 32, cfo.charcount); |
| if (!fontbuf) { |
| log_oom(); |
| return; |
| } |
| /* get fonts from the source console */ |
| cfo.data = fontbuf; |
| r = ioctl(src_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(src_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_full(log_level, "Fonts will not be copied to remaining consoles"); |
| |
| for (i = 1; i <= 63; i++) { |
| char ttyname[sizeof("/dev/tty63")]; |
| _cleanup_close_ int fd_d = -1; |
| |
| if (i == src_idx || verify_vc_allocation(i) < 0) |
| continue; |
| |
| /* try to open terminal */ |
| xsprintf(ttyname, "/dev/tty%u", i); |
| fd_d = open_terminal(ttyname, O_RDWR|O_CLOEXEC|O_NOCTTY); |
| if (fd_d < 0) { |
| log_warning_errno(fd_d, "Unable to open tty%u, fonts will not be copied: %m", i); |
| continue; |
| } |
| |
| if (verify_vc_kbmode(fd_d) < 0) |
| continue; |
| |
| (void) toggle_utf8_vc(ttyname, fd_d, utf8); |
| |
| if (cfo.op != KD_FONT_OP_SET) |
| continue; |
| |
| r = ioctl(fd_d, KDFONTOP, &cfo); |
| if (r < 0) { |
| int last_errno, mode; |
| |
| /* The fonts couldn't have been copied. It might be due to the |
| * terminal being in graphical mode. In this case the kernel |
| * returns -EINVAL which is too generic for distinguishing this |
| * specific case. So we need to retrieve the terminal mode and if |
| * the graphical mode is in used, let's assume that something else |
| * is using the terminal and the failure was expected as we |
| * shouldn't have tried to copy the fonts. */ |
| |
| last_errno = errno; |
| if (ioctl(fd_d, KDGETMODE, &mode) >= 0 && mode != KD_TEXT) |
| log_debug("KD_FONT_OP_SET skipped: tty%u is not in text mode", i); |
| else |
| log_warning_errno(last_errno, "KD_FONT_OP_SET failed, fonts will not be copied to tty%u: %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%u: %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%u: %m", i); |
| continue; |
| } |
| |
| log_debug("Font and unimap successfully copied to %s", ttyname); |
| } |
| } |
| |
| static int find_source_vc(char **ret_path, unsigned *ret_idx) { |
| _cleanup_free_ char *path = NULL; |
| int r, err = 0; |
| unsigned i; |
| |
| path = new(char, sizeof("/dev/tty63")); |
| if (!path) |
| return log_oom(); |
| |
| for (i = 1; i <= 63; i++) { |
| _cleanup_close_ int fd = -1; |
| |
| r = verify_vc_allocation(i); |
| if (r < 0) { |
| if (!err) |
| err = -r; |
| continue; |
| } |
| |
| sprintf(path, "/dev/tty%u", i); |
| fd = open_terminal(path, O_RDWR|O_CLOEXEC|O_NOCTTY); |
| if (fd < 0) { |
| if (!err) |
| err = -fd; |
| continue; |
| } |
| r = verify_vc_kbmode(fd); |
| if (r < 0) { |
| if (!err) |
| err = -r; |
| continue; |
| } |
| |
| /* all checks passed, return this one as a source console */ |
| *ret_idx = i; |
| *ret_path = TAKE_PTR(path); |
| return TAKE_FD(fd); |
| } |
| |
| return log_error_errno(err, "No usable source console found: %m"); |
| } |
| |
| static int verify_source_vc(char **ret_path, const char *src_vc) { |
| _cleanup_close_ int fd = -1; |
| char *path; |
| int r; |
| |
| fd = open_terminal(src_vc, O_RDWR|O_CLOEXEC|O_NOCTTY); |
| if (fd < 0) |
| return log_error_errno(fd, "Failed to open %s: %m", src_vc); |
| |
| r = verify_vc_device(fd); |
| if (r < 0) |
| return log_error_errno(r, "Device %s is not a virtual console: %m", src_vc); |
| |
| r = verify_vc_allocation_byfd(fd); |
| if (r < 0) |
| return log_error_errno(r, "Virtual console %s is not allocated: %m", src_vc); |
| |
| r = verify_vc_kbmode(fd); |
| if (r < 0) |
| return log_error_errno(r, "Virtual console %s is not in K_XLATE or K_UNICODE: %m", src_vc); |
| |
| path = strdup(src_vc); |
| if (!path) |
| return log_oom(); |
| |
| *ret_path = path; |
| return TAKE_FD(fd); |
| } |
| |
| int main(int argc, char **argv) { |
| _cleanup_free_ char |
| *vc = NULL, |
| *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, keyboard_ok; |
| unsigned idx = 0; |
| int r; |
| |
| log_setup(); |
| |
| umask(0022); |
| |
| if (argv[1]) |
| fd = verify_source_vc(&vc, argv[1]); |
| else |
| fd = find_source_vc(&vc, &idx); |
| if (fd < 0) |
| return EXIT_FAILURE; |
| |
| utf8 = is_locale_utf8(); |
| |
| r = parse_env_file(NULL, "/etc/vconsole.conf", |
| "KEYMAP", &vc_keymap, |
| "KEYMAP_TOGGLE", &vc_keymap_toggle, |
| "FONT", &vc_font, |
| "FONT_MAP", &vc_font_map, |
| "FONT_UNIMAP", &vc_font_unimap); |
| 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 */ |
| r = proc_cmdline_get_key_many( |
| PROC_CMDLINE_STRIP_RD_PREFIX, |
| "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); |
| if (r < 0 && r != -ENOENT) |
| log_warning_errno(r, "Failed to read /proc/cmdline: %m"); |
| |
| (void) toggle_utf8_sysfs(utf8); |
| (void) toggle_utf8_vc(vc, fd, utf8); |
| |
| r = font_load_and_wait(vc, vc_font, vc_font_map, vc_font_unimap); |
| keyboard_ok = keyboard_load_and_wait(vc, vc_keymap, vc_keymap_toggle, utf8) == 0; |
| |
| if (idx > 0) { |
| if (r == 0) |
| setup_remaining_vcs(fd, idx, utf8); |
| else if (r == EX_OSERR) |
| /* setfont returns EX_OSERR when ioctl(KDFONTOP/PIO_FONTX/PIO_FONTX) fails. |
| * This might mean various things, but in particular lack of a graphical |
| * console. Let's be generous and not treat this as an error. */ |
| log_notice("Setting fonts failed with a \"system error\", ignoring."); |
| else |
| log_warning("Setting source virtual console failed, ignoring remaining ones"); |
| } |
| |
| return IN_SET(r, 0, EX_OSERR) && keyboard_ok ? EXIT_SUCCESS : EXIT_FAILURE; |
| } |
