/* vi: set sw=4 ts=4: */ /* * Mini dumpkmap implementation for busybox * * Copyright (C) Arne Bernin <arne@matrix.loopback.org> * * Licensed under GPLv2 or later, see file LICENSE in this source tree. * */ /* no options, no getopt */ //usage:#define dumpkmap_trivial_usage //usage: "> keymap" //usage:#define dumpkmap_full_usage "\n\n" //usage: "Print a binary keyboard translation table to stdout" //usage: //usage:#define dumpkmap_example_usage //usage: "$ dumpkmap > keymap\n" #include "libbb.h" /* From <linux/kd.h> */ struct kbentry { unsigned char kb_table; unsigned char kb_index; unsigned short kb_value; }; #define KDGKBENT 0x4B46 /* gets one entry in translation table */ /* From <linux/keyboard.h> */ #define NR_KEYS 128 #define MAX_NR_KEYMAPS 256 int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int dumpkmap_main(int argc UNUSED_PARAM, char **argv) { struct kbentry ke; int i, j, fd; #define flags bb_common_bufsiz1 /* When user accidentally runs "dumpkmap FILE" * instead of "dumpkmap >FILE", we'd dump binary stuff to tty. * Let's prevent it: */ if (argv[1]) bb_show_usage(); /* bb_warn_ignoring_args(argv[1]);*/ fd = get_console_fd_or_die(); #if 0 write(STDOUT_FILENO, "bkeymap", 7); /* Here we want to set everything to 0 except for indexes: * [0-2] [4-6] [8-10] [12] */ /*memset(flags, 0x00, MAX_NR_KEYMAPS); - already is */ memset(flags, 0x01, 13); flags[3] = flags[7] = flags[11] = 0; /* dump flags */ write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS); #define flags7 flags #else /* Same effect */ /* 0 1 2 3 4 5 6 7 8 9 a b c=12 */ memcpy(flags, "bkeymap\1\1\1\0\1\1\1\0\1\1\1\0\1", /* Can use sizeof, or sizeof-1. sizeof is even, using that */ /****/ sizeof("bkeymap\1\1\1\0\1\1\1\0\1\1\1\0\1") ); write(STDOUT_FILENO, flags, 7 + MAX_NR_KEYMAPS); #define flags7 (flags + 7) #endif for (i = 0; i < 13; i++) { if (flags7[i]) { for (j = 0; j < NR_KEYS; j++) { ke.kb_index = j; ke.kb_table = i; if (!ioctl_or_perror(fd, KDGKBENT, &ke, "ioctl(KDGKBENT{%d,%d}) failed", j, i) ) { write(STDOUT_FILENO, &ke.kb_value, 2); } } } } if (ENABLE_FEATURE_CLEAN_UP) { close(fd); } return EXIT_SUCCESS; }