Hello All,
I am trying to get the key press & release event from the keyboard. That is
I need unique value for every key press & release events. For that I changed
the keyboard driver mode to MEDIUM_RAW, Before I exit from my program, I am
restoring it back to normal mode. When I came out of the program , my system
becomes unusable. That is, the keyboard driver is in some different mode,
thereby making me to do a hard-reset. (Ctl-Alt_Del wont works..some junk
char will be printed on the screen).I am using Linux 2.4.18. Does anyone
have idea about what is going wrong in my side. FYI: I am running this
program from a console.(No Xserver) Below is the code.
Is there any other way to restore the system without doing hard-reset when
this sort of problem comes?
If this query is irrelevant to this list, I am sorry for posting it here.
With Regards
sampath
int main()
{
unsigned char ch;
int count = 0;
int lastmode = 0;
int STDIN = 0;
if (ioctl(STDIN, KDGKBMODE, &lastmode) < 0)
{
perror(NULL);
exit(1);
}
switch(lastmode)
{
case K_RAW:
printf("raw \n");
break;
case K_MEDIUMRAW:
printf("medium raw \n");
break;
case K_XLATE:
printf("xlate \n");
break;
case K_UNICODE:
printf("unicode \n");
break;
default:
printf("unknown \n");
break;
}
ioctl(STDIN, KDSKBMODE, K_MEDIUMRAW);
read (STDIN, &ch, 1); // PROBLEM COMES FROM THIS READ
printf("%d\n", ch);
ioctl(STDIN, I_FLUSH, FLUSHR); // EVEN I TRIED TO FLUSH
fflush(stdin); // EVEN I
TRIED TO FLUSH; HOPING THIS WOULD DO SOMETHING
ioctl(STDIN, KDSKBMODE, lastmode);
}
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