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#include "project.h"
input_dev_t *input_devs = NULL;
static void
set_nonblocking (int fd)
{
long arg = 0;
arg = fcntl (fd, F_GETFL, arg);
arg |= O_NONBLOCK;
fcntl (fd, F_SETFL, arg);
}
static char *
input_dev_name (int i)
{
static char fn[1024];
sprintf (fn, "/dev/input/event%d", i);
return fn;
}
static input_dev_t *
get_input_dev (int id)
{
input_dev_t *ret;
int fd;
unsigned short ids[4];
char *fn;
for (ret = input_devs; ret; ret = ret->next)
if (ret->id == id)
return ret;
fn = input_dev_name (id);
fd = open (fn, O_RDWR);
if (fd < 0)
return NULL;
set_nonblocking (fd);
ret = malloc (sizeof (*ret));
bzero (ret, sizeof (*ret));
ret->id = id;
ret->fd = fd;
ioctl (fd, EVIOCGID, ids);
if ((ids[ID_VENDOR] == 0xea0) && (ids[ID_PRODUCT] == 0x2211))
ret->blacklistid = 1;
printf
("New input device %s (%d) bus 0x%x vendor 0x%x product 0x%x version 0x%x\n",
fn, id, ids[ID_BUS], ids[ID_VENDOR], ids[ID_PRODUCT], ids[ID_VERSION]);
ret->next = input_devs;
input_devs = ret;
return ret;
}
static void
free_input_dev (input_dev_t * d)
{
printf ("Removid input device %s (%d)\n", input_dev_name (d->id), d->id);
if (d->fd > -1)
close (d->fd);
free (d);
}
void
scan_input_devs (void)
{
DIR *dir = opendir ("/dev/input");
struct dirent *de;
int i;
input_dev_t *id, **idp;
int version;
for (idp = &input_devs; (id = *idp);)
{
id->present = 0;
if (access (input_dev_name (id->id), F_OK)
|| ioctl (id->fd, EVIOCGVERSION, &version))
{
*idp = id->next;
free_input_dev (id);
}
else
{
idp = &id->next;
}
}
if (dir)
{
while ((de = readdir (dir)))
{
if (!strcmp (de->d_name, "event"))
continue;
i = atoi (de->d_name + 5);
id = get_input_dev (i);
if (id)
id->present = 1;
}
closedir (dir);
}
for (idp = &input_devs; (id = *idp);)
{
if (!id->present)
{
*idp = id->next;
free_input_dev (id);
}
else
{
idp = &id->next;
}
}
}
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