/* 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 */ #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; RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS); /* 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(); 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); memset(flags, 0x01, 13); flags[3] = flags[7] = flags[11] = 0; /* dump flags */ write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS); for (i = 0; i < MAX_NR_KEYMAPS; i++) { if (flags[i] == 1) { for (j = 0; j < NR_KEYS; j++) { ke.kb_index = j; ke.kb_table = i; if (!ioctl_or_perror(fd, KDGKBENT, &ke, "ioctl failed with %s, %s, %p", (char *)&ke.kb_index, (char *)&ke.kb_table, &ke.kb_value) ) { write(STDOUT_FILENO, (void*)&ke.kb_value, 2); } } } } if (ENABLE_FEATURE_CLEAN_UP) { close(fd); RELEASE_CONFIG_BUFFER(flags); } return EXIT_SUCCESS; }