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// SPDX-License-Identifier: MIT
/*
* Copyright © 2013 Red Hat, Inc.
*/
#include "config.h"
#include <fcntl.h>
#include <poll.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <linux/uinput.h>
#include <dirent.h>
#include <libevdev/libevdev.h>
#include <libevdev/libevdev-int.h>
#include <libevdev/libevdev-util.h>
#include <libevdev/libevdev-uinput.h>
#include "test-common-uinput.h"
#define SYS_INPUT_DIR "/sys/class/input"
#define DEV_INPUT_DIR "/dev/input/"
struct uinput_device
{
struct libevdev *d; /* lazy, it has all the accessors */
struct libevdev_uinput *uidev;
int dev_fd; /* open fd to the devnode */
int uinput_fd;
};
struct uinput_device*
uinput_device_new(const char *name)
{
struct uinput_device *dev;
dev = calloc(1, sizeof(*dev));
if (!dev)
return NULL;
dev->d = libevdev_new();
dev->dev_fd = -1;
dev->uinput_fd = -1;
if (name)
libevdev_set_name(dev->d, name);
return dev;
}
int
uinput_device_new_with_events_v(struct uinput_device **d, const char *name, const struct input_id *id, va_list args)
{
int rc;
struct uinput_device *dev;
dev = uinput_device_new(name);
if (!dev)
return -ENOMEM;
if (id != DEFAULT_IDS)
uinput_device_set_ids(dev, id);
rc = uinput_device_set_event_bits_v(dev, args);
if (rc == 0)
rc = uinput_device_create(dev);
if (rc != 0) {
uinput_device_free(dev);
dev = NULL;
} else
*d = dev;
return rc;
}
int
uinput_device_new_with_events(struct uinput_device **d, const char *name, const struct input_id *id, ...)
{
int rc;
va_list args;
va_start(args, id);
rc = uinput_device_new_with_events_v(d, name, id, args);
va_end(args);
return rc;
}
void
uinput_device_free(struct uinput_device *dev)
{
if (!dev)
return;
if (dev->uinput_fd != -1) {
(void)ioctl(dev->uinput_fd, UI_DEV_DESTROY, NULL);
close(dev->uinput_fd);
}
if (dev->dev_fd != -1)
close(dev->dev_fd);
libevdev_free(dev->d);
libevdev_uinput_destroy(dev->uidev);
free(dev);
}
int
uinput_device_get_fd(const struct uinput_device *dev)
{
return dev->dev_fd;
}
const char*
uinput_device_get_devnode(const struct uinput_device *dev)
{
return libevdev_uinput_get_devnode(dev->uidev);
}
int
uinput_device_create(struct uinput_device* d)
{
int rc;
int fd;
const char *devnode;
fd = open("/dev/uinput", O_RDWR);
if (fd < 0)
goto error;
d->uinput_fd = fd;
rc = libevdev_uinput_create_from_device(d->d, fd, &d->uidev);
if (rc != 0)
goto error;
devnode = libevdev_uinput_get_devnode(d->uidev);
if (devnode == NULL)
goto error;
d->dev_fd = open(devnode, O_RDWR);
if (d->dev_fd == -1)
goto error;
/* write abs resolution now */
if (libevdev_has_event_type(d->d, EV_ABS)) {
int code;
for (code = 0; code < ABS_CNT; code++) {
const struct input_absinfo *abs;
/* can't change slots */
if (code == ABS_MT_SLOT)
continue;
abs = libevdev_get_abs_info(d->d, code);
if (!abs)
continue;
rc = ioctl(d->dev_fd, EVIOCSABS(code), abs);
if (rc < 0) {
printf("error %s for code %d\n", strerror(-rc), code);
goto error;
}
}
}
return 0;
error:
if (d->dev_fd != -1)
close(d->dev_fd);
if (d->uinput_fd != -1)
close(d->uinput_fd);
return -errno;
}
int uinput_device_set_name(struct uinput_device *dev, const char *name)
{
libevdev_set_name(dev->d, name);
return 0;
}
int uinput_device_set_ids(struct uinput_device *dev, const struct input_id *ids)
{
libevdev_set_id_product(dev->d, ids->product);
libevdev_set_id_vendor(dev->d, ids->vendor);
libevdev_set_id_bustype(dev->d, ids->bustype);
libevdev_set_id_version(dev->d, ids->version);
return 0;
}
int
uinput_device_set_bit(struct uinput_device* dev, unsigned int bit)
{
return libevdev_enable_event_type(dev->d, bit);
}
int
uinput_device_set_prop(struct uinput_device *dev, unsigned int prop)
{
return libevdev_enable_property(dev->d, prop);
}
int
uinput_device_set_event_bit(struct uinput_device* dev, unsigned int type, unsigned int code)
{
return libevdev_enable_event_code(dev->d, type, code, NULL);
}
int
uinput_device_set_event_bits_v(struct uinput_device *dev, va_list args)
{
int type, code;
int rc = 0;
do {
type = va_arg(args, int);
if (type == -1)
break;
code = va_arg(args, int);
if (code == -1)
break;
rc = libevdev_enable_event_code(dev->d, type, code, NULL);
} while (rc == 0);
return rc;
}
int
uinput_device_set_event_bits(struct uinput_device *dev, ...)
{
int rc;
va_list args;
va_start(args, dev);
rc = uinput_device_set_event_bits_v(dev, args);
va_end(args);
return rc;
}
int
uinput_device_set_abs_bit(struct uinput_device* dev, unsigned int code, const struct input_absinfo *absinfo)
{
return libevdev_enable_event_code(dev->d, EV_ABS, code, absinfo);
}
int
uinput_device_event(const struct uinput_device *dev, unsigned int type, unsigned int code, int value)
{
return libevdev_uinput_write_event(dev->uidev, type, code, value);
}
int uinput_device_event_multiple_v(const struct uinput_device* dev, va_list args)
{
int type, code, value;
int rc = 0;
do {
type = va_arg(args, int);
if (type == -1)
break;
code = va_arg(args, int);
if (code == -1)
break;
value = va_arg(args, int);
rc = uinput_device_event(dev, type, code, value);
} while (rc == 0);
return rc;
}
int uinput_device_event_multiple(const struct uinput_device* dev, ...)
{
int rc;
va_list args;
va_start(args, dev);
rc = uinput_device_event_multiple_v(dev, args);
va_end(args);
return rc;
}
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