Input: constify input core
[linux-2.6.git] / drivers / input / evdev.c
1 /*
2  * Event char devices, giving access to raw input device events.
3  *
4  * Copyright (c) 1999-2002 Vojtech Pavlik
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License version 2 as published by
8  * the Free Software Foundation.
9  */
10
11 #define EVDEV_MINOR_BASE        64
12 #define EVDEV_MINORS            32
13 #define EVDEV_BUFFER_SIZE       64
14
15 #include <linux/poll.h>
16 #include <linux/slab.h>
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/input.h>
20 #include <linux/major.h>
21 #include <linux/smp_lock.h>
22 #include <linux/device.h>
23 #include <linux/compat.h>
24
25 struct evdev {
26         int exist;
27         int open;
28         int minor;
29         char name[16];
30         struct input_handle handle;
31         wait_queue_head_t wait;
32         struct evdev_list *grab;
33         struct list_head list;
34 };
35
36 struct evdev_list {
37         struct input_event buffer[EVDEV_BUFFER_SIZE];
38         int head;
39         int tail;
40         struct fasync_struct *fasync;
41         struct evdev *evdev;
42         struct list_head node;
43 };
44
45 static struct evdev *evdev_table[EVDEV_MINORS];
46
47 static void evdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int value)
48 {
49         struct evdev *evdev = handle->private;
50         struct evdev_list *list;
51
52         if (evdev->grab) {
53                 list = evdev->grab;
54
55                 do_gettimeofday(&list->buffer[list->head].time);
56                 list->buffer[list->head].type = type;
57                 list->buffer[list->head].code = code;
58                 list->buffer[list->head].value = value;
59                 list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
60
61                 kill_fasync(&list->fasync, SIGIO, POLL_IN);
62         } else
63                 list_for_each_entry(list, &evdev->list, node) {
64
65                         do_gettimeofday(&list->buffer[list->head].time);
66                         list->buffer[list->head].type = type;
67                         list->buffer[list->head].code = code;
68                         list->buffer[list->head].value = value;
69                         list->head = (list->head + 1) & (EVDEV_BUFFER_SIZE - 1);
70
71                         kill_fasync(&list->fasync, SIGIO, POLL_IN);
72                 }
73
74         wake_up_interruptible(&evdev->wait);
75 }
76
77 static int evdev_fasync(int fd, struct file *file, int on)
78 {
79         int retval;
80         struct evdev_list *list = file->private_data;
81
82         retval = fasync_helper(fd, file, on, &list->fasync);
83
84         return retval < 0 ? retval : 0;
85 }
86
87 static int evdev_flush(struct file *file, fl_owner_t id)
88 {
89         struct evdev_list *list = file->private_data;
90
91         if (!list->evdev->exist)
92                 return -ENODEV;
93
94         return input_flush_device(&list->evdev->handle, file);
95 }
96
97 static void evdev_free(struct evdev *evdev)
98 {
99         evdev_table[evdev->minor] = NULL;
100         kfree(evdev);
101 }
102
103 static int evdev_release(struct inode * inode, struct file * file)
104 {
105         struct evdev_list *list = file->private_data;
106
107         if (list->evdev->grab == list) {
108                 input_release_device(&list->evdev->handle);
109                 list->evdev->grab = NULL;
110         }
111
112         evdev_fasync(-1, file, 0);
113         list_del(&list->node);
114
115         if (!--list->evdev->open) {
116                 if (list->evdev->exist)
117                         input_close_device(&list->evdev->handle);
118                 else
119                         evdev_free(list->evdev);
120         }
121
122         kfree(list);
123         return 0;
124 }
125
126 static int evdev_open(struct inode * inode, struct file * file)
127 {
128         struct evdev_list *list;
129         int i = iminor(inode) - EVDEV_MINOR_BASE;
130
131         if (i >= EVDEV_MINORS || !evdev_table[i] || !evdev_table[i]->exist)
132                 return -ENODEV;
133
134         if (!(list = kzalloc(sizeof(struct evdev_list), GFP_KERNEL)))
135                 return -ENOMEM;
136
137         list->evdev = evdev_table[i];
138         list_add_tail(&list->node, &evdev_table[i]->list);
139         file->private_data = list;
140
141         if (!list->evdev->open++)
142                 if (list->evdev->exist)
143                         input_open_device(&list->evdev->handle);
144
145         return 0;
146 }
147
148 #ifdef CONFIG_COMPAT
149
150 struct input_event_compat {
151         struct compat_timeval time;
152         __u16 type;
153         __u16 code;
154         __s32 value;
155 };
156
157 /* Note to the author of this code: did it ever occur to
158    you why the ifdefs are needed? Think about it again. -AK */
159 #ifdef CONFIG_X86_64
160 #  define COMPAT_TEST is_compat_task()
161 #elif defined(CONFIG_IA64)
162 #  define COMPAT_TEST IS_IA32_PROCESS(task_pt_regs(current))
163 #elif defined(CONFIG_S390)
164 #  define COMPAT_TEST test_thread_flag(TIF_31BIT)
165 #elif defined(CONFIG_MIPS)
166 #  define COMPAT_TEST (current->thread.mflags & MF_32BIT_ADDR)
167 #else
168 #  define COMPAT_TEST test_thread_flag(TIF_32BIT)
169 #endif
170
171 static inline size_t evdev_event_size(void)
172 {
173         return COMPAT_TEST ?
174                 sizeof(struct input_event_compat) : sizeof(struct input_event);
175 }
176
177 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
178 {
179         if (COMPAT_TEST) {
180                 struct input_event_compat compat_event;
181
182                 if (copy_from_user(&compat_event, buffer, sizeof(struct input_event_compat)))
183                         return -EFAULT;
184
185                 event->time.tv_sec = compat_event.time.tv_sec;
186                 event->time.tv_usec = compat_event.time.tv_usec;
187                 event->type = compat_event.type;
188                 event->code = compat_event.code;
189                 event->value = compat_event.value;
190
191         } else {
192                 if (copy_from_user(event, buffer, sizeof(struct input_event)))
193                         return -EFAULT;
194         }
195
196         return 0;
197 }
198
199 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
200 {
201         if (COMPAT_TEST) {
202                 struct input_event_compat compat_event;
203
204                 compat_event.time.tv_sec = event->time.tv_sec;
205                 compat_event.time.tv_usec = event->time.tv_usec;
206                 compat_event.type = event->type;
207                 compat_event.code = event->code;
208                 compat_event.value = event->value;
209
210                 if (copy_to_user(buffer, &compat_event, sizeof(struct input_event_compat)))
211                         return -EFAULT;
212
213         } else {
214                 if (copy_to_user(buffer, event, sizeof(struct input_event)))
215                         return -EFAULT;
216         }
217
218         return 0;
219 }
220
221 #else
222
223 static inline size_t evdev_event_size(void)
224 {
225         return sizeof(struct input_event);
226 }
227
228 static int evdev_event_from_user(const char __user *buffer, struct input_event *event)
229 {
230         if (copy_from_user(event, buffer, sizeof(struct input_event)))
231                 return -EFAULT;
232
233         return 0;
234 }
235
236 static int evdev_event_to_user(char __user *buffer, const struct input_event *event)
237 {
238         if (copy_to_user(buffer, event, sizeof(struct input_event)))
239                 return -EFAULT;
240
241         return 0;
242 }
243
244 #endif /* CONFIG_COMPAT */
245
246 static ssize_t evdev_write(struct file * file, const char __user * buffer, size_t count, loff_t *ppos)
247 {
248         struct evdev_list *list = file->private_data;
249         struct input_event event;
250         int retval = 0;
251
252         if (!list->evdev->exist)
253                 return -ENODEV;
254
255         while (retval < count) {
256
257                 if (evdev_event_from_user(buffer + retval, &event))
258                         return -EFAULT;
259                 input_inject_event(&list->evdev->handle, event.type, event.code, event.value);
260                 retval += evdev_event_size();
261         }
262
263         return retval;
264 }
265
266 static ssize_t evdev_read(struct file * file, char __user * buffer, size_t count, loff_t *ppos)
267 {
268         struct evdev_list *list = file->private_data;
269         int retval;
270
271         if (count < evdev_event_size())
272                 return -EINVAL;
273
274         if (list->head == list->tail && list->evdev->exist && (file->f_flags & O_NONBLOCK))
275                 return -EAGAIN;
276
277         retval = wait_event_interruptible(list->evdev->wait,
278                 list->head != list->tail || (!list->evdev->exist));
279
280         if (retval)
281                 return retval;
282
283         if (!list->evdev->exist)
284                 return -ENODEV;
285
286         while (list->head != list->tail && retval + evdev_event_size() <= count) {
287
288                 struct input_event *event = (struct input_event *) list->buffer + list->tail;
289
290                 if (evdev_event_to_user(buffer + retval, event))
291                         return -EFAULT;
292
293                 list->tail = (list->tail + 1) & (EVDEV_BUFFER_SIZE - 1);
294                 retval += evdev_event_size();
295         }
296
297         return retval;
298 }
299
300 /* No kernel lock - fine */
301 static unsigned int evdev_poll(struct file *file, poll_table *wait)
302 {
303         struct evdev_list *list = file->private_data;
304
305         poll_wait(file, &list->evdev->wait, wait);
306         return ((list->head == list->tail) ? 0 : (POLLIN | POLLRDNORM)) |
307                 (list->evdev->exist ? 0 : (POLLHUP | POLLERR));
308 }
309
310 #ifdef CONFIG_COMPAT
311
312 #define BITS_PER_LONG_COMPAT (sizeof(compat_long_t) * 8)
313 #define NBITS_COMPAT(x) ((((x) - 1) / BITS_PER_LONG_COMPAT) + 1)
314
315 #ifdef __BIG_ENDIAN
316 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
317                         unsigned int maxlen, void __user *p, int compat)
318 {
319         int len, i;
320
321         if (compat) {
322                 len = NBITS_COMPAT(maxbit) * sizeof(compat_long_t);
323                 if (len < maxlen)
324                         len = maxlen;
325
326                 for (i = 0; i < len / sizeof(compat_long_t); i++)
327                         if (copy_to_user((compat_long_t __user *) p + i,
328                                          (compat_long_t *) bits +
329                                                 i + 1 - ((i % 2) << 1),
330                                          sizeof(compat_long_t)))
331                                 return -EFAULT;
332         } else {
333                 len = NBITS(maxbit) * sizeof(long);
334                 if (len > maxlen)
335                         len = maxlen;
336
337                 if (copy_to_user(p, bits, len))
338                         return -EFAULT;
339         }
340
341         return len;
342 }
343 #else
344 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
345                         unsigned int maxlen, void __user *p, int compat)
346 {
347         int len = compat ?
348                         NBITS_COMPAT(maxbit) * sizeof(compat_long_t) :
349                         NBITS(maxbit) * sizeof(long);
350
351         if (len > maxlen)
352                 len = maxlen;
353
354         return copy_to_user(p, bits, len) ? -EFAULT : len;
355 }
356 #endif /* __BIG_ENDIAN */
357
358 #else
359
360 static int bits_to_user(unsigned long *bits, unsigned int maxbit,
361                         unsigned int maxlen, void __user *p, int compat)
362 {
363         int len = NBITS(maxbit) * sizeof(long);
364
365         if (len > maxlen)
366                 len = maxlen;
367
368         return copy_to_user(p, bits, len) ? -EFAULT : len;
369 }
370
371 #endif /* CONFIG_COMPAT */
372
373 static int str_to_user(const char *str, unsigned int maxlen, void __user *p)
374 {
375         int len;
376
377         if (!str)
378                 return -ENOENT;
379
380         len = strlen(str) + 1;
381         if (len > maxlen)
382                 len = maxlen;
383
384         return copy_to_user(p, str, len) ? -EFAULT : len;
385 }
386
387 static long evdev_ioctl_handler(struct file *file, unsigned int cmd,
388                                 void __user *p, int compat_mode)
389 {
390         struct evdev_list *list = file->private_data;
391         struct evdev *evdev = list->evdev;
392         struct input_dev *dev = evdev->handle.dev;
393         struct input_absinfo abs;
394         struct ff_effect effect;
395         int __user *ip = (int __user *)p;
396         int i, t, u, v;
397         int error;
398
399         if (!evdev->exist)
400                 return -ENODEV;
401
402         switch (cmd) {
403
404                 case EVIOCGVERSION:
405                         return put_user(EV_VERSION, ip);
406
407                 case EVIOCGID:
408                         if (copy_to_user(p, &dev->id, sizeof(struct input_id)))
409                                 return -EFAULT;
410                         return 0;
411
412                 case EVIOCGREP:
413                         if (!test_bit(EV_REP, dev->evbit))
414                                 return -ENOSYS;
415                         if (put_user(dev->rep[REP_DELAY], ip))
416                                 return -EFAULT;
417                         if (put_user(dev->rep[REP_PERIOD], ip + 1))
418                                 return -EFAULT;
419                         return 0;
420
421                 case EVIOCSREP:
422                         if (!test_bit(EV_REP, dev->evbit))
423                                 return -ENOSYS;
424                         if (get_user(u, ip))
425                                 return -EFAULT;
426                         if (get_user(v, ip + 1))
427                                 return -EFAULT;
428
429                         input_inject_event(&evdev->handle, EV_REP, REP_DELAY, u);
430                         input_inject_event(&evdev->handle, EV_REP, REP_PERIOD, v);
431
432                         return 0;
433
434                 case EVIOCGKEYCODE:
435                         if (get_user(t, ip))
436                                 return -EFAULT;
437                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
438                                 return -EINVAL;
439                         if (put_user(INPUT_KEYCODE(dev, t), ip + 1))
440                                 return -EFAULT;
441                         return 0;
442
443                 case EVIOCSKEYCODE:
444                         if (get_user(t, ip))
445                                 return -EFAULT;
446                         if (t < 0 || t >= dev->keycodemax || !dev->keycodesize)
447                                 return -EINVAL;
448                         if (get_user(v, ip + 1))
449                                 return -EFAULT;
450                         if (v < 0 || v > KEY_MAX)
451                                 return -EINVAL;
452                         if (dev->keycodesize < sizeof(v) && (v >> (dev->keycodesize * 8)))
453                                 return -EINVAL;
454
455                         u = SET_INPUT_KEYCODE(dev, t, v);
456                         clear_bit(u, dev->keybit);
457                         set_bit(v, dev->keybit);
458                         for (i = 0; i < dev->keycodemax; i++)
459                                 if (INPUT_KEYCODE(dev, i) == u)
460                                         set_bit(u, dev->keybit);
461
462                         return 0;
463
464                 case EVIOCSFF:
465                         if (copy_from_user(&effect, p, sizeof(effect)))
466                                 return -EFAULT;
467
468                         error = input_ff_upload(dev, &effect, file);
469
470                         if (put_user(effect.id, &(((struct ff_effect __user *)p)->id)))
471                                 return -EFAULT;
472
473                         return error;
474
475                 case EVIOCRMFF:
476                         return input_ff_erase(dev, (int)(unsigned long) p, file);
477
478                 case EVIOCGEFFECTS:
479                         i = test_bit(EV_FF, dev->evbit) ? dev->ff->max_effects : 0;
480                         if (put_user(i, ip))
481                                 return -EFAULT;
482                         return 0;
483
484                 case EVIOCGRAB:
485                         if (p) {
486                                 if (evdev->grab)
487                                         return -EBUSY;
488                                 if (input_grab_device(&evdev->handle))
489                                         return -EBUSY;
490                                 evdev->grab = list;
491                                 return 0;
492                         } else {
493                                 if (evdev->grab != list)
494                                         return -EINVAL;
495                                 input_release_device(&evdev->handle);
496                                 evdev->grab = NULL;
497                                 return 0;
498                         }
499
500                 default:
501
502                         if (_IOC_TYPE(cmd) != 'E')
503                                 return -EINVAL;
504
505                         if (_IOC_DIR(cmd) == _IOC_READ) {
506
507                                 if ((_IOC_NR(cmd) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0,0))) {
508
509                                         long *bits;
510                                         int len;
511
512                                         switch (_IOC_NR(cmd) & EV_MAX) {
513                                                 case      0: bits = dev->evbit;  len = EV_MAX;  break;
514                                                 case EV_KEY: bits = dev->keybit; len = KEY_MAX; break;
515                                                 case EV_REL: bits = dev->relbit; len = REL_MAX; break;
516                                                 case EV_ABS: bits = dev->absbit; len = ABS_MAX; break;
517                                                 case EV_MSC: bits = dev->mscbit; len = MSC_MAX; break;
518                                                 case EV_LED: bits = dev->ledbit; len = LED_MAX; break;
519                                                 case EV_SND: bits = dev->sndbit; len = SND_MAX; break;
520                                                 case EV_FF:  bits = dev->ffbit;  len = FF_MAX;  break;
521                                                 case EV_SW:  bits = dev->swbit;  len = SW_MAX;  break;
522                                                 default: return -EINVAL;
523                                         }
524                                         return bits_to_user(bits, len, _IOC_SIZE(cmd), p, compat_mode);
525                                 }
526
527                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGKEY(0)))
528                                         return bits_to_user(dev->key, KEY_MAX, _IOC_SIZE(cmd),
529                                                             p, compat_mode);
530
531                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGLED(0)))
532                                         return bits_to_user(dev->led, LED_MAX, _IOC_SIZE(cmd),
533                                                             p, compat_mode);
534
535                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSND(0)))
536                                         return bits_to_user(dev->snd, SND_MAX, _IOC_SIZE(cmd),
537                                                             p, compat_mode);
538
539                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGSW(0)))
540                                         return bits_to_user(dev->sw, SW_MAX, _IOC_SIZE(cmd),
541                                                             p, compat_mode);
542
543                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGNAME(0)))
544                                         return str_to_user(dev->name, _IOC_SIZE(cmd), p);
545
546                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGPHYS(0)))
547                                         return str_to_user(dev->phys, _IOC_SIZE(cmd), p);
548
549                                 if (_IOC_NR(cmd) == _IOC_NR(EVIOCGUNIQ(0)))
550                                         return str_to_user(dev->uniq, _IOC_SIZE(cmd), p);
551
552                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0))) {
553
554                                         int t = _IOC_NR(cmd) & ABS_MAX;
555
556                                         abs.value = dev->abs[t];
557                                         abs.minimum = dev->absmin[t];
558                                         abs.maximum = dev->absmax[t];
559                                         abs.fuzz = dev->absfuzz[t];
560                                         abs.flat = dev->absflat[t];
561
562                                         if (copy_to_user(p, &abs, sizeof(struct input_absinfo)))
563                                                 return -EFAULT;
564
565                                         return 0;
566                                 }
567
568                         }
569
570                         if (_IOC_DIR(cmd) == _IOC_WRITE) {
571
572                                 if ((_IOC_NR(cmd) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0))) {
573
574                                         int t = _IOC_NR(cmd) & ABS_MAX;
575
576                                         if (copy_from_user(&abs, p, sizeof(struct input_absinfo)))
577                                                 return -EFAULT;
578
579                                         dev->abs[t] = abs.value;
580                                         dev->absmin[t] = abs.minimum;
581                                         dev->absmax[t] = abs.maximum;
582                                         dev->absfuzz[t] = abs.fuzz;
583                                         dev->absflat[t] = abs.flat;
584
585                                         return 0;
586                                 }
587                         }
588         }
589         return -EINVAL;
590 }
591
592 static long evdev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
593 {
594         return evdev_ioctl_handler(file, cmd, (void __user *)arg, 0);
595 }
596
597 #ifdef CONFIG_COMPAT
598 static long evdev_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
599 {
600         return evdev_ioctl_handler(file, cmd, compat_ptr(arg), 1);
601 }
602 #endif
603
604 static const struct file_operations evdev_fops = {
605         .owner =        THIS_MODULE,
606         .read =         evdev_read,
607         .write =        evdev_write,
608         .poll =         evdev_poll,
609         .open =         evdev_open,
610         .release =      evdev_release,
611         .unlocked_ioctl = evdev_ioctl,
612 #ifdef CONFIG_COMPAT
613         .compat_ioctl = evdev_ioctl_compat,
614 #endif
615         .fasync =       evdev_fasync,
616         .flush =        evdev_flush
617 };
618
619 static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev,
620                                           const struct input_device_id *id)
621 {
622         struct evdev *evdev;
623         struct class_device *cdev;
624         int minor;
625
626         for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
627         if (minor == EVDEV_MINORS) {
628                 printk(KERN_ERR "evdev: no more free evdev devices\n");
629                 return NULL;
630         }
631
632         if (!(evdev = kzalloc(sizeof(struct evdev), GFP_KERNEL)))
633                 return NULL;
634
635         INIT_LIST_HEAD(&evdev->list);
636         init_waitqueue_head(&evdev->wait);
637
638         evdev->exist = 1;
639         evdev->minor = minor;
640         evdev->handle.dev = dev;
641         evdev->handle.name = evdev->name;
642         evdev->handle.handler = handler;
643         evdev->handle.private = evdev;
644         sprintf(evdev->name, "event%d", minor);
645
646         evdev_table[minor] = evdev;
647
648         cdev = class_device_create(&input_class, &dev->cdev,
649                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
650                         dev->cdev.dev, evdev->name);
651
652         /* temporary symlink to keep userspace happy */
653         sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
654                           evdev->name);
655
656         return &evdev->handle;
657 }
658
659 static void evdev_disconnect(struct input_handle *handle)
660 {
661         struct evdev *evdev = handle->private;
662         struct evdev_list *list;
663
664         sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
665         class_device_destroy(&input_class,
666                         MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
667         evdev->exist = 0;
668
669         if (evdev->open) {
670                 input_flush_device(handle, NULL);
671                 input_close_device(handle);
672                 wake_up_interruptible(&evdev->wait);
673                 list_for_each_entry(list, &evdev->list, node)
674                         kill_fasync(&list->fasync, SIGIO, POLL_HUP);
675         } else
676                 evdev_free(evdev);
677 }
678
679 static const struct input_device_id evdev_ids[] = {
680         { .driver_info = 1 },   /* Matches all devices */
681         { },                    /* Terminating zero entry */
682 };
683
684 MODULE_DEVICE_TABLE(input, evdev_ids);
685
686 static struct input_handler evdev_handler = {
687         .event =        evdev_event,
688         .connect =      evdev_connect,
689         .disconnect =   evdev_disconnect,
690         .fops =         &evdev_fops,
691         .minor =        EVDEV_MINOR_BASE,
692         .name =         "evdev",
693         .id_table =     evdev_ids,
694 };
695
696 static int __init evdev_init(void)
697 {
698         input_register_handler(&evdev_handler);
699         return 0;
700 }
701
702 static void __exit evdev_exit(void)
703 {
704         input_unregister_handler(&evdev_handler);
705 }
706
707 module_init(evdev_init);
708 module_exit(evdev_exit);
709
710 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
711 MODULE_DESCRIPTION("Input driver event char devices");
712 MODULE_LICENSE("GPL");