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#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <getopt.h>
#include <string.h>
#include <strings.h>
int main(int argc, char **argv)
{
char shift_state;
const char* usage =
"Usage: shift-not-pressed [--help]\n\n"
"exit codes:\n"
" 0 (succes) shift was not pressed\n"
" 1 (succes) shift was pressed\n"
" 2 (fail) could not get shift state\n";
static struct option lopts[] = {
{"help", no_argument, NULL, 'h'}
};
int c;
while (1) {
int opti;
c = getopt_long(argc, argv, "h", lopts, &opti);
if (c == -1) {
break;
}
switch (c) {
case 'h': fprintf(stdout, "%s", usage);
exit(0);
break;
default: break;
}
}
shift_state = 6;
if (ioctl(0, TIOCLINUX, &shift_state) < 0) {
perror("ioctl TIOCLINUX 6 (get shift state)");
exit(2);
}
exit(shift_state);
}
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