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xrdp/genkeymap/genkeymap.c

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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
* genkeymap.c
* Copyright (C) Ádám Wallner 2008 <wallner@bitbaro.hu>
*
* You may redistribute it and/or modify it under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* main.cc 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with main.cc. If not, write to:
* The Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301, USA
Updated Jay Sorg 2009
cs Czech 0x405
de German 0x407
en-us US English 0x409
fr French 0x40c
it Italian 0x410
br Portuguese (Brazil) 0x416
ru Russian 0x419
se Swedish 0x41d
en-uk UK English 0x809
*/
#if defined(HAVE_CONFIG_H)
#include <config_ac.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/XKBlib.h>
#include <X11/extensions/XKBrules.h>
#include <locale.h>
#include <unistd.h>
#include "scancode.h"
#include "xrdp_constants.h"
// cppcheck doesn't always set this macro to something in double-quotes
#if defined(__cppcheck__)
#undef PACKAGE_VERSION
#endif
#if !defined(PACKAGE_VERSION)
#define PACKAGE_VERSION "???"
#endif
#define NUM_STATES 9
#define KEYMAP_FILE_FORMAT_VERSION "2"
// Scancodes affected by numlock
#define IS_KEYPAD_SCANCODE(s) \
((s) >= XR_RDP_SCAN_MIN_NUMLOCK && (s) <= XR_RDP_SCAN_MAX_NUMLOCK)
#define MAX_COMMENTS 10
/**
* Contains info about the current keyboard setting
*/
struct kbd_info
{
char *keycode_set; ///< See 'setxkbmap -v'
char *rules; ///< See 'setxkbmap -query'
char *model; ///< See 'setxkbmap -query'
char *layout; ///< See 'setxkbmap -query'
char *variant; ///< See 'setxkbmap -query'
char *options; ///< See 'setxkbmap -query' (comma separated)
};
/*****************************************************************************/
/**
* Print brief info about program usage and exit
* @param programname Unqualified name of program
* @param status Exit status
*/
static void
usage(const char *programname, int status)
{
fprintf(stderr, "Usage: %s [ -k keycode_set] [-c comment] [-c comment...]"
" out_filename\n", programname);
fprintf(stderr, "Example: %s -r evdev -c \"en-US pc104 keyboard\""
" /etc/xrdp/km-00000409.toml\n", programname);
exit(status);
}
/*****************************************************************************/
/**
* Free a kbd_info struct
* @param kbd_info struct to free. May be incomplete or NULL
*/
static void
free_kbd_info(struct kbd_info *kbd_info)
{
if (kbd_info != NULL)
{
free(kbd_info->keycode_set);
free(kbd_info->rules);
free(kbd_info->model);
free(kbd_info->layout);
free(kbd_info->variant);
free(kbd_info->options);
free(kbd_info);
}
}
/*****************************************************************************/
/**
* Queries the X server to get information about the current keyboard
* @param dpy X11 Display
* @param programname Unqualified name of program
* @return kbd_info struct, or NULL
*
* The structure may be incomplete if some data could not be obtained
*/
static struct kbd_info *
get_kbd_info(Display *dpy, const char *programname)
{
struct kbd_info *kbd_info;
char *rules;
XkbRF_VarDefsRec vd;
XkbDescPtr kbdesc = NULL;
if ((kbd_info = (struct kbd_info *)malloc( sizeof(*kbd_info))) == NULL)
{
fprintf(stderr, "%s: Out of memory\n", programname);
}
else if ((kbdesc = XkbAllocKeyboard()) == NULL)
{
fprintf(stderr, "%s: unable to allocate keyboard desc\n",
programname);
free_kbd_info(kbd_info);
kbd_info = NULL;
}
else if (XkbGetNames(dpy, XkbKeycodesNameMask, kbdesc) != Success)
{
fprintf(stderr, "%s: unable to obtain keycode name for keyboard\n",
programname);
free_kbd_info(kbd_info);
kbd_info = NULL;
}
else
{
char *symatom = XGetAtomName(dpy, kbdesc->names->keycodes);
kbd_info->keycode_set = strdup(symatom);
XFree(symatom);
if (XkbRF_GetNamesProp(dpy, &rules, &vd) == 0 || rules == NULL)
{
fprintf(stderr, "%s: Couldn't interpret %s property\n",
programname, _XKB_RF_NAMES_PROP_ATOM);
kbd_info->rules = NULL;
kbd_info->model = NULL;
kbd_info->layout = NULL;
kbd_info->variant = NULL;
kbd_info->options = NULL;
}
else
{
kbd_info->rules = rules;
kbd_info->model = vd.model;
kbd_info->layout = vd.layout;
kbd_info->variant = vd.variant;
kbd_info->options = vd.options;
}
}
if (kbdesc != NULL)
{
XkbFreeKeyboard(kbdesc, 0, True);
}
return kbd_info;
}
/*****************************************************************************/
/**
* Outputs a comment containing the last setxkbmap command
*
* @param outf Output file
* @param kbd_info Keyboard info struct
*
*/
static void
output_setxkbmap_comment(FILE *outf, const struct kbd_info *kbd_info)
{
if (kbd_info->model != NULL || kbd_info->layout != NULL ||
kbd_info->variant != NULL || kbd_info->options != NULL)
{
fprintf(outf, "# setxkbmap -rules %s", kbd_info->rules);
if (kbd_info->model != NULL)
{
fprintf(outf, " -model %s", kbd_info->model);
}
if (kbd_info->layout != NULL)
{
fprintf(outf, " -layout %s", kbd_info->layout);
}
if (kbd_info->variant != NULL)
{
fprintf(outf, " -variant %s", kbd_info->variant);
}
if (kbd_info->options != NULL)
{
// Options is comma-separated, but to achieve the same effect
// with the command we need to use multiple '-option' args
char *optionstr = strdup(kbd_info->options);
if (optionstr != NULL)
{
char *p = strtok(optionstr, ",");
fprintf(outf, " -option \"\"");
while (p != NULL)
{
fprintf(outf, " -option %s", p);
p = strtok(NULL, ",");
}
free(optionstr);
}
}
putc('\n', outf);
}
}
/*****************************************************************************/
/**
* Output a section of the keymap file
* @param outf Output file
* @param dpy X display
* @param section name Section name (e.g. 'shift')
* @param event_state Modifier state needed for XKeyPressedEvent
*/
static void
output_file_section(FILE *outf,
Display *dpy,
const char *section_name,
unsigned int event_state)
{
XKeyPressedEvent e =
{
.type = KeyPress,
.serial = 16,
.send_event = True,
.display = dpy,
.state = event_state,
.same_screen = True
};
int char_count;
int nbytes = 0;
int unicode;
KeySym ks;
const char *ksstr;
unsigned short scancode;
unsigned int iter = 0;
char text[256];
wchar_t wtext[256];
int is_numlock_section = (strcmp(section_name, "numlock") == 0);
fprintf(outf, "\n[%s]\n", section_name);
while ((scancode = scancode_get_next(&iter)) != 0)
{
// Numlock state table can be very small
if (is_numlock_section && !IS_KEYPAD_SCANCODE(scancode))
{
continue;
}
e.keycode = scancode_to_keycode(scancode);
nbytes = XLookupString(&e, text, 255, &ks, NULL);
if (ks == NoSymbol)
{
continue;
}
ksstr = XKeysymToString(ks);
if (ksstr == NULL)
{
continue;
}
text[nbytes] = 0;
char_count = mbstowcs(wtext, text, 255);
unicode = 0;
if (char_count == 1)
{
unicode = wtext[0];
}
if (scancode > 0xff)
{
fputs("E0_", outf);
}
fprintf(outf, "%02X=\"%d", (scancode & 0xff), (int)ks);
if (unicode != 0)
{
fprintf(outf, ":U+%04X", unicode);
}
fprintf(outf, "\" # %s\n", ksstr);
}
}
/*****************************************************************************/
/**
* Main
* @param argc Argument count
* @param argv Pointers to arguments
* @return 0 for success
*/
int main(int argc, char **argv)
{
const char *programname;
int opt;
char *displayname = NULL;
char *outfname;
const char *sections[NUM_STATES] =
{
"noshift", "shift", "altgr", "shiftaltgr",
"capslock", "capslockaltgr", "shiftcapslock", "shiftcapslockaltgr",
"numlock"
};
int states[NUM_STATES] = {0, 1, 0x80, 0x81, 2, 0x82, 3, 0x83, 0x10};
int idx;
Display *dpy = NULL;
FILE *outf = NULL;
const char *comment[MAX_COMMENTS] = {0};
int comment_count = 0;
const char *keycode_set = NULL;
struct kbd_info *kbd_info = NULL;
int status = 1;
setlocale(LC_CTYPE, "");
if (strrchr(argv[0], '/') != NULL)
{
programname = strrchr(argv[0], '/') + 1;
}
else
{
programname = argv[0];
}
while ((opt = getopt(argc, argv, "c:k:")) != -1)
{
switch (opt)
{
case 'c':
if (comment_count < MAX_COMMENTS)
{
comment[comment_count++] = optarg;
}
break;
case 'k':
keycode_set = optarg;
break;
default: /* '?' */
usage(programname, 1);
}
}
if ((optind + 1) != argc)
{
usage(programname, 1);
}
outfname = argv[optind];
dpy = XOpenDisplay(displayname);
if (!dpy)
{
fprintf(stderr, "%s: unable to open display '%s'\n",
programname, XDisplayName(displayname));
goto finish;
}
if ((kbd_info = get_kbd_info(dpy, programname)) == 0)
{
// An error has already been logged
goto finish;
}
// If the keycode set isn't specified, use the one returned
// by the XKB extension
if (keycode_set == NULL)
{
keycode_set = kbd_info->keycode_set;
}
if (scancode_set_keycode_set(keycode_set) != 0)
{
fprintf(stderr, "%s: keycode set '%s' is not recognised\n",
programname, keycode_set);
goto finish;
}
if ((outf = fopen(outfname, "w")) == NULL)
{
fprintf(stderr, "%s: unable to create file '%s'\n",
programname, outfname);
goto finish;
}
fprintf(outf, "# Created by %s V" PACKAGE_VERSION
"\n# Key code set: %s\n",
programname, keycode_set);
output_setxkbmap_comment(outf, kbd_info);
for (idx = 0; idx < comment_count; ++idx)
{
fprintf(outf, "# %s\n", comment[idx]);
}
fprintf(outf, "\n[General]\nversion=" KEYMAP_FILE_FORMAT_VERSION "\n");
for (idx = 0; idx < NUM_STATES; idx++) /* Sections and states */
{
output_file_section(outf, dpy, sections[idx], states[idx]);
}
status = 0; // Successful run
finish:
free_kbd_info(kbd_info);
if (dpy != NULL)
{
XCloseDisplay(dpy);
}
if (outf != NULL)
{
fclose(outf);
}
return status;
}
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