linux-kernel - Re: [PATCH 1/3] ir-kbd-i2c: Allow use of ir-kdb-i2c internal get_key funcs and set ir

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Date:	Sun, 19 Jul 2009 14:26:53 -0400
From:	Mark Lord <lkml@....ca>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Andy Walls <awalls@...ix.net>, linux-media@...r.kernel.org,
	Jarod Wilson <jarod@...hat.com>, Mike Isely <isely@...ox.com>,
	Hans Verkuil <hverkuil@...all.nl>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Janne Grunau <j@...nau.net>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] ir-kbd-i2c: Allow use of ir-kdb-i2c internal get_key
    funcs and set ir_type

(resending.. somebody trimmed linux-kernel from the CC: earlier)

Jean Delvare wrote:
> On Sun, 19 Jul 2009 10:38:37 -0400, Mark Lord wrote:
>> I'm debugging various other b0rked things in 2.6.31 here right now,
>> so I had a closer look at the Hauppauge I/R remote issue.
>>
>> The ir_kbd_i2c driver *does* still find it after all.
>> But the difference is that the output from 'lsinput' has changed
>> and no longer says "Hauppauge".  Which prevents the application from
>> finding the remote control in the same way as before.
>
> OK, thanks for the investigation.
>
>> I'll hack the application code here now to use the new output,
>> but I wonder what the the thousands of other users will do when
>> they first try 2.6.31 after release ?
>
> Where does lsinput get the string from?
..

Here's a test program for you:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/input.h>

// Invoke with "/dev/input/event4" as argv[1]
//
// On 2.6.30, this gives the real name, eg. "i2c IR (Hauppauge)".
// On 2.6.31, it simply gives "event4" as the "name".

int main(int argc, char *argv[])
{
	char buf[32];
	int fd, rc;

	fd = open(argv[1], O_RDONLY);
	if (fd == -1) {
		perror(argv[1]);
		exit(1);
	}
	rc = ioctl(fd,EVIOCGNAME(sizeof(buf)),buf);
	if (rc >= 0)
		fprintf(stderr,"   name    : \"%.*s\"\n", rc, buf);
	return 0;
}
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