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#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <linux/kd.h>
#include <linux/vt.h>
#include <errno.h>
static void setkey_usage(char *argv[])
{
fprintf(stderr, "%s [-t <table>] [-k <index>] [-v value] [-r] [-h]\n"
" -t <table> Select table\n"
" -k <index> Select key\n"
" -v <value> Set entry\n"
" -r Read current entry\n"
" -h Print help\n", argv[0]);
}
#define TTYDEV "/dev/tty0"
int setkey_main(int argc, char *argv[])
{
int fd;
struct kbentry kbe;
int did_something = 0;
kbe.kb_table = 0;
kbe.kb_index = -1;
kbe.kb_value = 0;
fd = open(TTYDEV, O_RDWR | O_SYNC);
if (fd < 0) {
fprintf(stderr, "open %s: %s\n", TTYDEV, strerror(errno));
return 1;
}
do {
int c, ret;
c = getopt(argc, argv, "t:k:v:hr");
if (c == EOF)
break;
switch (c) {
case 't':
kbe.kb_table = strtol(optarg, NULL, 0);
break;
case 'k':
kbe.kb_index = strtol(optarg, NULL, 0);
break;
case 'v':
kbe.kb_value = strtol(optarg, NULL, 0);
ret = ioctl(fd, KDSKBENT, &kbe);
if (ret < 0) {
fprintf(stderr, "KDSKBENT %d %d %d failed: %s\n",
kbe.kb_table, kbe.kb_index, kbe.kb_value,
strerror(errno));
return 1;
}
did_something = 1;
break;
case 'r':
ret = ioctl(fd, KDGKBENT, &kbe);
if (ret < 0) {
fprintf(stderr, "KDGKBENT %d %d failed: %s\n",
kbe.kb_table, kbe.kb_index, strerror(errno));
return 1;
}
printf("0x%x 0x%x 0x%x\n",
kbe.kb_table, kbe.kb_index, kbe.kb_value);
did_something = 1;
break;
case 'h':
setkey_usage(argv);
return 1;
case '?':
fprintf(stderr, "%s: invalid option -%c\n",
argv[0], optopt);
return 1;
}
} while (1);
if(optind != argc || !did_something) {
setkey_usage(argv);
return 1;
}
return 0;
}
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