mirror of
https://github.com/topjohnwu/ndk-busybox.git
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84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* setkeycodes
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*
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* Copyright (C) 1994-1998 Andries E. Brouwer <aeb@cwi.nl>
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*
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* Adjusted for BusyBox by Erik Andersen <andersee@debian.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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/* From <linux/kd.h> */
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struct kbkeycode {
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unsigned int scancode, keycode;
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};
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#define KDSETKEYCODE 0x4B4D /* write kernel keycode table entry */
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static const char setkeycodes_usage[] =
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"setkeycodes SCANCODE KEYCODE ...\n"
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#ifndef BB_FEATURE_TRIVIAL_HELP
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"\nSet entries into the kernel's scancode-to-keycode map,\n"
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"allowing unusual keyboards to generate usable keycodes.\n\n"
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"SCANCODE may be either xx or e0xx (hexadecimal),\n"
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"and KEYCODE is given in decimal\n"
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#endif
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;
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extern int
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setkeycodes_main(int argc, char** argv)
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{
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char *ep;
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int fd, sc;
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struct kbkeycode a;
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if (argc % 2 != 1 || argc < 2) {
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usage(setkeycodes_usage);
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}
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fd = get_console_fd("/dev/console");
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while (argc > 2) {
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a.keycode = atoi(argv[2]);
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a.scancode = sc = strtol(argv[1], &ep, 16);
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if (*ep) {
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fatalError("error reading SCANCODE: '%s'\n", argv[1]);
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}
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if (a.scancode > 127) {
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a.scancode -= 0xe000;
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a.scancode += 128;
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}
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if (a.scancode > 255 || a.keycode > 127) {
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fatalError("SCANCODE or KEYCODE outside bounds\n");
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}
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if (ioctl(fd,KDSETKEYCODE,&a)) {
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perror("KDSETKEYCODE");
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fatalError("failed to set SCANCODE %x to KEYCODE %d\n", sc, a.keycode);
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}
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argc -= 2;
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argv += 2;
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}
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return( TRUE);
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}
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