/* vi: set sw=4 ts=4: */ /* * Mini loadkmap implementation for busybox * * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es> * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ //config:config LOADKMAP //config: bool "loadkmap" //config: default y //config: select PLATFORM_LINUX //config: help //config: This program loads a keyboard translation table from //config: standard input. //applet:IF_LOADKMAP(APPLET(loadkmap, BB_DIR_SBIN, BB_SUID_DROP)) //kbuild:lib-$(CONFIG_LOADKMAP) += loadkmap.o //usage:#define loadkmap_trivial_usage //usage: "< keymap" //usage:#define loadkmap_full_usage "\n\n" //usage: "Load a binary keyboard translation table from stdin" ////usage: "\n" ////usage: "\n -C TTY Affect TTY instead of /dev/tty" //usage: //usage:#define loadkmap_example_usage //usage: "$ loadkmap < /etc/i18n/lang-keymap\n" #include "libbb.h" #define BINARY_KEYMAP_MAGIC "bkeymap" /* From <linux/kd.h> */ struct kbentry { unsigned char kb_table; unsigned char kb_index; unsigned short kb_value; }; /* sets one entry in translation table */ #define KDSKBENT 0x4B47 /* From <linux/keyboard.h> */ #define NR_KEYS 128 #define MAX_NR_KEYMAPS 256 int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int loadkmap_main(int argc UNUSED_PARAM, char **argv) { struct kbentry ke; int i, j, fd; uint16_t ibuff[NR_KEYS]; /* const char *tty_name = CURRENT_TTY; */ RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS); /* When user accidentally runs "loadkmap FILE" * instead of "loadkmap <FILE", we end up waiting for input from tty. * Let's prevent it: */ if (argv[1]) bb_show_usage(); /* bb_warn_ignoring_args(argv[1]); */ fd = get_console_fd_or_die(); /* or maybe: opt = getopt32(argv, "C:", &tty_name); fd = xopen_nonblocking(tty_name); */ xread(STDIN_FILENO, flags, 7); if (!is_prefixed_with(flags, BINARY_KEYMAP_MAGIC)) bb_error_msg_and_die("not a valid binary keymap"); xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS); for (i = 0; i < MAX_NR_KEYMAPS; i++) { if (flags[i] != 1) continue; xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t)); for (j = 0; j < NR_KEYS; j++) { ke.kb_index = j; ke.kb_table = i; ke.kb_value = ibuff[j]; /* * Note: table[idx:0] can contain special value * K_ALLOCATED (marks allocated tables in kernel). * dumpkmap saves the value as-is; but attempts * to load it here fail, since it isn't a valid * key value: it is K(KT_SPEC,126) == 2<<8 + 126, * whereas last valid KT_SPEC is * K_BARENUMLOCK == K(KT_SPEC,19). * So far we just ignore these errors: */ ioctl(fd, KDSKBENT, &ke); } } if (ENABLE_FEATURE_CLEAN_UP) { close(fd); RELEASE_CONFIG_BUFFER(flags); } return EXIT_SUCCESS; }