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1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini loadkmap implementation for busybox
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4 | *
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5 | * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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8 | *
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9 | */
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10 |
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11 | #include "libbb.h"
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12 |
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13 | #define BINARY_KEYMAP_MAGIC "bkeymap"
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14 |
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15 | /* From <linux/kd.h> */
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16 | struct kbentry {
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17 | unsigned char kb_table;
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18 | unsigned char kb_index;
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19 | unsigned short kb_value;
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20 | };
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21 | /* sets one entry in translation table */
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22 | #define KDSKBENT 0x4B47
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23 |
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24 | /* From <linux/keyboard.h> */
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25 | #define NR_KEYS 128
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26 | #define MAX_NR_KEYMAPS 256
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27 |
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28 | int loadkmap_main(int argc, char **argv);
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29 | int loadkmap_main(int argc, char **argv)
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30 | {
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31 | struct kbentry ke;
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32 | int i, j, fd;
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33 | uint16_t ibuff[NR_KEYS];
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34 | char flags[MAX_NR_KEYMAPS];
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35 | char buff[7];
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36 |
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37 | if (argc != 1)
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38 | bb_show_usage();
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39 |
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40 | fd = xopen(CURRENT_VC, O_RDWR);
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41 |
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42 | xread(0, buff, 7);
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43 | if (strncmp(buff, BINARY_KEYMAP_MAGIC, 7))
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44 | bb_error_msg_and_die("this is not a valid binary keymap");
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45 |
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46 | xread(0, flags, MAX_NR_KEYMAPS);
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47 |
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48 | for (i = 0; i < MAX_NR_KEYMAPS; i++) {
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49 | if (flags[i] == 1) {
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50 | xread(0, ibuff, NR_KEYS * sizeof(uint16_t));
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51 | for (j = 0; j < NR_KEYS; j++) {
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52 | ke.kb_index = j;
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53 | ke.kb_table = i;
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54 | ke.kb_value = ibuff[j];
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55 | ioctl(fd, KDSKBENT, &ke);
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56 | }
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57 | }
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58 | }
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59 |
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60 | if (ENABLE_FEATURE_CLEAN_UP) close(fd);
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61 | return 0;
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62 | }
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