mirror of
https://github.com/sheumann/hush.git
synced 2024-12-22 14:30:31 +00:00
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini loadkmap implementation for busybox
|
|
*
|
|
* Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include "internal.h"
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
/* From <linux/kd.h> */
|
|
struct kbentry {
|
|
unsigned char kb_table;
|
|
unsigned char kb_index;
|
|
unsigned short kb_value;
|
|
};
|
|
#define KDSKBENT 0x4B47 /* sets one entry in translation table */
|
|
|
|
/* From <linux/keyboard.h> */
|
|
#define NR_KEYS 128
|
|
#define MAX_NR_KEYMAPS 256
|
|
|
|
|
|
static const char loadkmap_usage[] = "loadkmap\n"
|
|
#ifndef BB_FEATURE_TRIVIAL_HELP
|
|
"\nLoads a binary keyboard translation table from standard input.\n"
|
|
#endif
|
|
;
|
|
|
|
|
|
int loadkmap_main(int argc, char **argv)
|
|
{
|
|
struct kbentry ke;
|
|
u_short *ibuff;
|
|
int i, j, fd, readsz, pos, ibuffsz = NR_KEYS * sizeof(u_short);
|
|
char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap", buff[7];
|
|
|
|
if (argc>=2 && *argv[1]=='-') {
|
|
usage(loadkmap_usage);
|
|
}
|
|
|
|
fd = open("/dev/tty0", O_RDWR);
|
|
if (fd < 0) {
|
|
fprintf(stderr, "Error opening /dev/tty0: %s\n", strerror(errno));
|
|
exit(FALSE);
|
|
}
|
|
|
|
read(0, buff, 7);
|
|
if (0 != strncmp(buff, magic, 7)) {
|
|
fprintf(stderr, "This is not a valid binary keymap.\n");
|
|
exit(FALSE);
|
|
}
|
|
|
|
if (MAX_NR_KEYMAPS != read(0, flags, MAX_NR_KEYMAPS)) {
|
|
fprintf(stderr, "Error reading keymap flags: %s\n",
|
|
strerror(errno));
|
|
exit(FALSE);
|
|
}
|
|
|
|
ibuff = (u_short *) malloc(ibuffsz);
|
|
if (!ibuff) {
|
|
fprintf(stderr, "Out of memory.\n");
|
|
exit(FALSE);
|
|
}
|
|
|
|
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
|
|
if (flags[i] == 1) {
|
|
pos = 0;
|
|
while (pos < ibuffsz) {
|
|
if ((readsz = read(0, (char *) ibuff + pos, ibuffsz - pos))
|
|
< 0) {
|
|
fprintf(stderr, "Error reading keymap: %s\n",
|
|
strerror(errno));
|
|
exit(FALSE);
|
|
}
|
|
pos += readsz;
|
|
}
|
|
for (j = 0; j < NR_KEYS; j++) {
|
|
ke.kb_index = j;
|
|
ke.kb_table = i;
|
|
ke.kb_value = ibuff[j];
|
|
ioctl(fd, KDSKBENT, &ke);
|
|
}
|
|
}
|
|
}
|
|
/* Don't bother to close files. Exit does that
|
|
* automagically, so we can save a few bytes */
|
|
/* close(fd); */
|
|
return(TRUE);
|
|
}
|