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/* 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 tarball for details.
*/
#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 UNUSED_PARAM)
{
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 (strncmp(flags, BINARY_KEYMAP_MAGIC, 7))
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) {
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];
ioctl(fd, KDSKBENT, &ke);
}
}
}
if (ENABLE_FEATURE_CLEAN_UP) {
close(fd);
RELEASE_CONFIG_BUFFER(flags);
}
return EXIT_SUCCESS;
}
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