From 0629b78d815ce6a0b65aecc02fb18a122226274c Mon Sep 17 00:00:00 2001 From: Luke Shumaker Date: Wed, 25 May 2016 23:32:14 -0400 Subject: stuff --- src/systemd-vconsole/vconsole-setup.c | 326 ++++++++++++++++++++++++++++++++++ 1 file changed, 326 insertions(+) create mode 100644 src/systemd-vconsole/vconsole-setup.c (limited to 'src/systemd-vconsole/vconsole-setup.c') diff --git a/src/systemd-vconsole/vconsole-setup.c b/src/systemd-vconsole/vconsole-setup.c new file mode 100644 index 0000000000..8a1b824e65 --- /dev/null +++ b/src/systemd-vconsole/vconsole-setup.c @@ -0,0 +1,326 @@ +/*** + 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 . +***/ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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, ¤t) < 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 */ + 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; +} -- cgit v1.2.3-54-g00ecf