+/*
+ * keymap - dump keymap of an evdev device or set a new keymap from a file
+ *
+ * Based on keyfuzz by Lennart Poettering <mzqrovna@0pointer.net>
+ * Adapted for udev-extras by Martin Pitt <martin.pitt@ubuntu.com>
+ *
+ * Copyright (C) 2006, Lennart Poettering
+ * Copyright (C) 2009, Canonical Ltd.
+ *
+ * keymap is free software; you can 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.
+ *
+ * keymap 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 keymap; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <sys/ioctl.h>
+#include <linux/input.h>
+
+const struct key* lookup_key (const char *str, unsigned int len);
+
+#include "keys-from-name.h"
+#include "keys-to-name.h"
+
+#define MAX_SCANCODES 1024
+
+/* If keymap file is given without a path, assume this one; must end with '/' * */
+#define DEFAULT_PATH "/lib/udev/keymaps/"
+
+static int evdev_open(const char *dev)
+{
+ int fd;
+ char fn[PATH_MAX];
+
+ if (strncmp(dev, "/dev", 4) != 0) {
+ snprintf(fn, sizeof(fn), "/dev/%s", dev);
+ dev = fn;
+ }
+
+ if ((fd = open(dev, O_RDWR)) < 0) {
+ fprintf(stderr, "error open('%s'): %m\n", dev);
+ return -1;
+ }
+ return fd;
+}
+
+static int evdev_get_keycode(int fd, int scancode, int e)
+{
+ int codes[2];
+
+ codes[0] = scancode;
+ if (ioctl(fd, EVIOCGKEYCODE, codes) < 0) {
+ if (e && errno == EINVAL) {
+ return -2;
+ } else {
+ fprintf(stderr, "EVIOCGKEYCODE: %m\n");
+ return -1;
+ }
+ }
+ return codes[1];
+}
+
+static int evdev_set_keycode(int fd, int scancode, int keycode)
+{
+ int codes[2];
+
+ codes[0] = scancode;
+ codes[1] = keycode;
+
+ if (ioctl(fd, EVIOCSKEYCODE, codes) < 0) {
+ fprintf(stderr, "EVIOCSKEYCODE: %m\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int evdev_driver_version(int fd, char *v, size_t l)
+{
+ int version;
+
+ if (ioctl(fd, EVIOCGVERSION, &version)) {
+ fprintf(stderr, "EVIOCGVERSION: %m\n");
+ return -1;
+ }
+
+ snprintf(v, l, "%i.%i.%i.", version >> 16, (version >> 8) & 0xff, version & 0xff);
+ return 0;
+}
+
+static int evdev_device_name(int fd, char *n, size_t l)
+{
+ if (ioctl(fd, EVIOCGNAME(l), n) < 0) {
+ fprintf(stderr, "EVIOCGNAME: %m\n");
+ return -1;
+ }
+ return 0;
+}
+
+/* Return a lower-case string with KEY_ prefix removed */
+static const char* format_keyname(const char* key) {
+ static char result[101];
+ const char* s;
+ int len;
+
+ for (s = key+4, len = 0; *s && len < 100; ++len, ++s)
+ result[len] = tolower(*s);
+ result[len] = '\0';
+ return result;
+}
+
+static int dump_table(int fd) {
+ char version[256], name[256];
+ int scancode, r = -1;
+
+ if (evdev_driver_version(fd, version, sizeof(version)) < 0)
+ goto fail;
+
+ if (evdev_device_name(fd, name, sizeof(name)) < 0)
+ goto fail;
+
+ printf("### evdev %s, driver '%s'\n", version, name);
+
+ r = 0;
+ for (scancode = 0; scancode < MAX_SCANCODES; scancode++) {
+ int keycode;
+
+ if ((keycode = evdev_get_keycode(fd, scancode, 1)) < 0) {
+ if (keycode != -2)
+ r = -1;
+ break;
+ }
+
+ if (keycode < KEY_MAX && key_names[keycode])
+ printf("0x%03x %s\n", scancode, format_keyname(key_names[keycode]));
+ else
+ printf("0x%03x 0x%03x\n", scancode, keycode);
+ }
+fail:
+ return r;
+}
+
+static int merge_table(int fd, const char *filename) {
+ int r = 0;
+ int line = 0;
+ FILE* f;
+
+ f = fopen(filename, "r");
+ if (!f) {
+ perror(filename);
+ r = -1;
+ goto fail;
+ }
+
+ while (!feof(f)) {
+ char s[256], *p;
+ int scancode, new_keycode, old_keycode;
+
+ if (!fgets(s, sizeof(s), f))
+ break;
+
+ line++;
+ p = s+strspn(s, "\t ");
+ if (*p == '#' || *p == '\n')
+ continue;
+
+ if (sscanf(p, "%i %i", &scancode, &new_keycode) != 2) {
+ char t[105] = "KEY_UNKNOWN";
+ const struct key *k;
+
+ if (sscanf(p, "%i %100s", &scancode, t+4) != 2) {
+ fprintf(stderr, "WARNING: Parse failure at line %i, ignoring.\n", line);
+ r = -1;
+ continue;
+ }
+
+ if (!(k = lookup_key(t, strlen(t)))) {
+ fprintf(stderr, "WARNING: Unknown key '%s' at line %i, ignoring.\n", t, line);
+ r = -1;
+ continue;
+ }
+
+ new_keycode = k->id;
+ }
+
+
+ if ((old_keycode = evdev_get_keycode(fd, scancode, 0)) < 0) {
+ r = -1;
+ goto fail;
+ }
+
+ if (evdev_set_keycode(fd, scancode, new_keycode) < 0) {
+ r = -1;
+ goto fail;
+ }
+
+ if (new_keycode != old_keycode)
+ fprintf(stderr, "Remapped scancode 0x%02x to 0x%02x (prior: 0x%02x)\n",
+ scancode, new_keycode, old_keycode);
+ }
+fail:
+ return r;
+}
+
+static const char* default_keymap_path(const char* path)
+{
+ static char result[PATH_MAX];
+
+ if (!strchr(path, '/')) {
+ snprintf(result, sizeof(result), "%s%s", DEFAULT_PATH, path);
+ return result;
+ }
+ return path;
+}
+
+static void print_key(struct input_event *event)
+{
+ static int cur_scancode = 0;
+
+ /* save scan code for next EV_KEY event */
+ if (event->type == EV_MSC && event->code == MSC_SCAN)
+ cur_scancode = event->value;
+
+ /* key press */
+ if (event->type == EV_KEY && event->value)
+ printf("scan code: 0x%02X key code: %s\n", cur_scancode,
+ format_keyname(key_names[event->code]));
+}
+
+static void interactive(int fd)
+{
+ struct input_event ev;
+ int run = 1;
+
+ /* grab input device */
+ ioctl(fd, EVIOCGRAB, 1);
+
+ puts("Press ESC to finish");
+ while (run) {
+ switch (read(fd, &ev, sizeof(ev))) {
+ case -1:
+ perror("read");
+ run = 0;
+ break;
+ case 0:
+ run = 0;
+ break;
+ default:
+ print_key(&ev);
+ /* stop on Escape key release */
+ if (ev.type == EV_KEY && ev.code == KEY_ESC && ev.value == 0)
+ run = 0;
+ break;
+ }
+ }
+
+ /* release input device */
+ ioctl(fd, EVIOCGRAB, 0);
+}
+
+int main(int argc, char **argv)
+{
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "interactive", no_argument, NULL, 'i' },
+ {}
+ };
+ int fd = -1;
+ int opt_interactive = 0;
+
+ while (1) {
+ int option;
+
+ option = getopt_long(argc, argv, "hi", options, NULL);
+ if (option == -1)
+ break;
+
+ switch (option) {
+ case 'h':
+ printf("Usage: keymap <event device> [<map file>]\n\n");
+ return 0;
+
+ case 'i':
+ opt_interactive = 1;
+ break;
+ default:
+ return 1;
+ }
+ }
+
+ if (argc < optind+1 || argc > optind+2) {
+ fprintf(stderr, "Usage: keymap <event device> [<map file>]\n\n");
+ return 2;
+ }
+
+ if ((fd = evdev_open(argv[optind])) < 0)
+ return 3;
+
+ if (argc == optind+2)
+ merge_table(fd, default_keymap_path(argv[optind+1]));
+ else {
+ if (opt_interactive)
+ interactive(fd);
+ else
+ dump_table(fd);
+ }
+ return 0;
+}
~ianmdlvl / elogind.git / commitdiff