| /* 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; |
| } |