Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Mini loadkmap implementation for busybox |
| 4 | * |
| 5 | * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 20 | * |
| 21 | */ |
| 22 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 23 | #include "internal.h" |
| 24 | #include <errno.h> |
| 25 | #include <fcntl.h> |
| 26 | #include <stdio.h> |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 27 | #include <sys/ioctl.h> |
| 28 | |
Eric Andersen | bd22ed8 | 2000-07-08 18:55:24 +0000 | [diff] [blame^] | 29 | /* From <linux/kd.h> */ |
| 30 | struct kbentry { |
| 31 | unsigned char kb_table; |
| 32 | unsigned char kb_index; |
| 33 | unsigned short kb_value; |
| 34 | }; |
| 35 | #define KDSKBENT 0x4B47 /* sets one entry in translation table */ |
| 36 | |
| 37 | /* From <linux/keyboard.h> */ |
| 38 | #define NR_KEYS 128 |
| 39 | #define MAX_NR_KEYMAPS 256 |
| 40 | |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 41 | |
Erik Andersen | 7ab9c7e | 2000-05-12 19:41:47 +0000 | [diff] [blame] | 42 | static const char loadkmap_usage[] = "loadkmap\n" |
| 43 | #ifndef BB_FEATURE_TRIVIAL_HELP |
| 44 | "Loads a binary keyboard translation table from standard input.\n" |
| 45 | #endif |
| 46 | ; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 47 | |
| 48 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 49 | int loadkmap_main(int argc, char **argv) |
| 50 | { |
| 51 | struct kbentry ke; |
| 52 | u_short *ibuff; |
| 53 | int i, j, fd, readsz, pos, ibuffsz = NR_KEYS * sizeof(u_short); |
| 54 | char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap", buff[7]; |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 55 | |
Erik Andersen | 3fe7f9f | 2000-04-19 03:59:10 +0000 | [diff] [blame] | 56 | if (argc>=2 && *argv[1]=='-') { |
| 57 | usage(loadkmap_usage); |
| 58 | } |
| 59 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 60 | fd = open("/dev/tty0", O_RDWR); |
| 61 | if (fd < 0) { |
| 62 | fprintf(stderr, "Error opening /dev/tty0: %s\n", strerror(errno)); |
Erik Andersen | 3fe7f9f | 2000-04-19 03:59:10 +0000 | [diff] [blame] | 63 | exit(FALSE); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 64 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 65 | |
| 66 | read(0, buff, 7); |
| 67 | if (0 != strncmp(buff, magic, 7)) { |
| 68 | fprintf(stderr, "This is not a valid binary keymap.\n"); |
Erik Andersen | 3fe7f9f | 2000-04-19 03:59:10 +0000 | [diff] [blame] | 69 | exit(FALSE); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | if (MAX_NR_KEYMAPS != read(0, flags, MAX_NR_KEYMAPS)) { |
| 73 | fprintf(stderr, "Error reading keymap flags: %s\n", |
| 74 | strerror(errno)); |
Erik Andersen | 3fe7f9f | 2000-04-19 03:59:10 +0000 | [diff] [blame] | 75 | exit(FALSE); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 76 | } |
| 77 | |
| 78 | ibuff = (u_short *) malloc(ibuffsz); |
| 79 | if (!ibuff) { |
| 80 | fprintf(stderr, "Out of memory.\n"); |
Erik Andersen | 3fe7f9f | 2000-04-19 03:59:10 +0000 | [diff] [blame] | 81 | exit(FALSE); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 82 | } |
| 83 | |
| 84 | for (i = 0; i < MAX_NR_KEYMAPS; i++) { |
| 85 | if (flags[i] == 1) { |
| 86 | pos = 0; |
| 87 | while (pos < ibuffsz) { |
| 88 | if ((readsz = read(0, (char *) ibuff + pos, ibuffsz - pos)) |
| 89 | < 0) { |
| 90 | fprintf(stderr, "Error reading keymap: %s\n", |
| 91 | strerror(errno)); |
Erik Andersen | 3fe7f9f | 2000-04-19 03:59:10 +0000 | [diff] [blame] | 92 | exit(FALSE); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 93 | } |
| 94 | pos += readsz; |
| 95 | } |
| 96 | for (j = 0; j < NR_KEYS; j++) { |
| 97 | ke.kb_index = j; |
| 98 | ke.kb_table = i; |
| 99 | ke.kb_value = ibuff[j]; |
| 100 | ioctl(fd, KDSKBENT, &ke); |
| 101 | } |
| 102 | } |
| 103 | } |
Erik Andersen | 298854f | 2000-03-23 01:09:18 +0000 | [diff] [blame] | 104 | /* Don't bother to close files. Exit does that |
| 105 | * automagically, so we can save a few bytes */ |
| 106 | /* close(fd); */ |
Eric Andersen | b610615 | 2000-06-19 17:25:40 +0000 | [diff] [blame] | 107 | return(TRUE); |
Eric Andersen | cc8ed39 | 1999-10-05 16:24:54 +0000 | [diff] [blame] | 108 | } |