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Make uinput-code backwards-compatible to missing UI_SET_PROPBIT ioctl

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Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
This commit is contained in:
Peter Hutterer 2013-10-08 13:43:20 +10:00
parent f9bdb66ab4
commit ae738d29ea
1 changed files with 18 additions and 1 deletions
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19
libevdev/libevdev-uinput.c
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@ -40,6 +40,14 @@
#define SYS_INPUT_DIR "/sys/devices/virtual/input/"
#ifndef UINPUT_IOCTL_BASE
#define UINPUT_IOCTL_BASE 'U'
#endif
#ifndef UI_SET_PROPBIT
#define UI_SET_PROPBIT _IOW(UINPUT_IOCTL_BASE, 110, int)
#endif
static struct libevdev_uinput *
alloc_uinput_device(const char *name)
{
@ -132,8 +140,17 @@ set_props(const struct libevdev *dev, int fd, struct uinput_user_dev *uidev)
continue;
rc = ioctl(fd, UI_SET_PROPBIT, prop);
if (rc == -1)
if (rc == -1) {
/* If UI_SET_PROPBIT is not supported, treat -EINVAL
* as success. The kernel only sends -EINVAL for an
* invalid ioctl, invalid INPUT_PROP_MAX or if the
* ioctl is called on an already created device. The
* last two can't happen here.
*/
if (errno == -EINVAL)
rc = 0;
break;
}
}
return rc;
}