evdev.c - platform/external/strace - Git at Google

 /*
  * Copyright (c) 2015 Etienne Gemsa <etienne.gemsa@lse.epita.fr>
  * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
  *    derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "defs.h"

 #include <linux/ioctl.h>

 #ifdef HAVE_LINUX_INPUT_H
 #include <linux/input.h>
 #include "xlat/evdev_abs.h"
 #include "xlat/evdev_autorepeat.h"
 #include "xlat/evdev_ff_status.h"
 #include "xlat/evdev_ff_types.h"
 #include "xlat/evdev_keycode.h"
 #include "xlat/evdev_leds.h"
 #include "xlat/evdev_misc.h"
 #include "xlat/evdev_mtslots.h"
 #include "xlat/evdev_prop.h"
 #include "xlat/evdev_relative_axes.h"
 #include "xlat/evdev_snd.h"
 #include "xlat/evdev_switch.h"
 #include "xlat/evdev_sync.h"

 #ifndef SYN_MAX
 # define SYN_MAX 0xf
 #endif

 static void
 decode_envelope(struct ff_envelope *envelope)
 {
 	tprintf(", envelope={attack_length=%" PRIu16 ", attack_level=%" PRIu16
 		", fade_length=%" PRIu16 ", fade_level=%" PRIx32 "}",
 		envelope->attack_length,
 		envelope->attack_level,
 		envelope->fade_length,
 		envelope->fade_level);
 }

 static int
 ff_effect_ioctl(struct tcb *tcp, long arg)
 {
 	struct ff_effect ffe;

 	if (!verbose(tcp) || umove(tcp, arg, &ffe) < 0)
 		return 0;

 	tprints(", {type=");
 	printxval(evdev_ff_types, ffe.type, "FF_???");
 	tprintf(", id=%" PRIu16 ", direction=%" PRIu16,
 		ffe.id, ffe.direction);

 	if (!abbrev(tcp)) {
 		tprintf(", trigger={button=%" PRIu16 ", interval=%" PRIu16 "}",
 			ffe.trigger.button, ffe.trigger.interval);
 		tprintf(", replay={lenght=%" PRIu16 ", delay=%" PRIu16 "}",
 			ffe.replay.length, ffe.replay.delay);
 		switch (ffe.type) {
 			case FF_CONSTANT:
 				tprintf(", constant_ef={%" PRIi16,
 					ffe.u.constant.level);
 				decode_envelope(&ffe.u.constant.envelope);
 				tprints("}");
 				return 1;
 			case FF_RAMP:
 				tprintf(", ramp={start_level=%" PRIi16
 					", end_level=%" PRIi16,
 					ffe.u.ramp.start_level,
 					ffe.u.ramp.end_level);
 				decode_envelope(&ffe.u.ramp.envelope);
 				tprints("}");
 				return 1;
 			case FF_PERIODIC:
 				tprintf(", periodic_ef={waveform=%" PRIu16
 					", period=%" PRIu16
 					", magnitude=%" PRIi16
 					", offset=%" PRIi16
 					", phase=%" PRIu16,
 					ffe.u.periodic.waveform,
 					ffe.u.periodic.period,
 					ffe.u.periodic.magnitude,
 					ffe.u.periodic.offset,
 					ffe.u.periodic.phase);
 				decode_envelope(&ffe.u.periodic.envelope);
 				tprintf(", custom_len=%" PRIu32
 					", *custom_data=%#lx}",
 					ffe.u.periodic.custom_len,
 					(unsigned long)ffe.u.periodic.custom_data);
 				return 1;
 			case FF_RUMBLE:
 				tprintf(", rumble={strong_magnitude=%" PRIu16
 					", weak_magnitude=%" PRIu16 "}",
 					ffe.u.rumble.strong_magnitude,
 					ffe.u.rumble.weak_magnitude);
 				return 1;
 			case FF_SPRING:
 			case FF_FRICTION:
 			case FF_DAMPER:
 			case FF_INERTIA:
 			case FF_CUSTOM:
 				break;
 			default :
 				break;
 		}
 	}

 	tprints(", ...}");
 	return 1;
 }

 static int
 abs_ioctl(struct tcb *tcp, long arg)
 {
 	struct input_absinfo absinfo;

 	if (!verbose(tcp) || umove(tcp, arg, &absinfo) < 0)
 		return 0;

 	tprintf(", {value=%" PRIu32 ", minimum=%" PRIu32,
 		absinfo.value, absinfo.minimum);
 	if (!abbrev(tcp)) {
 		tprintf(", maximum=%" PRIu32 ", fuzz=%" PRIu32,
 			absinfo.maximum, absinfo.fuzz);
 		tprintf(", flat=%" PRIu32, absinfo.flat);
 #ifdef HAVE_STRUCT_INPUT_ABSINFO_RESOLUTION
 		tprintf(", resolution=%" PRIu32, absinfo.resolution);
 #endif
 		tprints("}");
 	} else {
 		tprints(", ...}");
 	}
 	return 1;
 }

 static int
 keycode_ioctl(struct tcb *tcp, long arg)
 {
 	unsigned int keycode[2];

 	if (!arg) {
 		tprints(", NULL");
 		return 1;
 	}

 	if (!verbose(tcp) || umove(tcp, arg, &keycode) < 0)
 		return 0;

 	tprintf(", [%u, ", keycode[0]);
 	printxval(evdev_keycode, keycode[1], "KEY_???");
 	tprints("]");
 	return 1;
 }

 #ifdef EVIOCGKEYCODE_V2
 static int
 keycode_V2_ioctl(struct tcb *tcp, long arg)
 {
 	struct input_keymap_entry ike;

 	if (!arg) {
 		tprints(", NULL");
 		return 1;
 	}

 	if (!verbose(tcp) || umove(tcp, arg, &ike) < 0)
 		return 0;

 	tprintf(", {flags=%" PRIu8 ", len=%" PRIu8, ike.flags, ike.len);
 	if (!abbrev(tcp)) {
 		unsigned int i;

 		tprintf(", index=%" PRIu16 ", keycode=", ike.index);
 		printxval(evdev_keycode, ike.keycode, "KEY_???");
 		tprints(", scancode=[");
 		for (i = 0; i < ARRAY_SIZE(ike.scancode); i++) {
 			if (i > 0)
 				tprints(", ");
 			tprintf("%" PRIx8, ike.scancode[i]);
 		}
 		tprints("]}");
 	} else {
 		tprints(", ...}");
 	}
 	return 1;
 }
 #endif /* EVIOCGKEYCODE_V2 */

 static int
 getid_ioctl(struct tcb *tcp, long arg)
 {
 	struct input_id id;

 	if (!verbose(tcp) || umove(tcp, arg, &id) < 0)
 		return 0;

 	tprintf(", {ID_BUS=%" PRIu16 ", ID_VENDOR=%" PRIu16,
 		id.bustype, id.vendor);
 	if (!abbrev(tcp)) {
 		tprintf(", ID_PRODUCT=%" PRIu16 ", ID_VERSION=%" PRIu16 "}",
 			id.product, id.version);
 	} else {
 		tprints(", ...}");
 	}
 	return 1;
 }

 static int
 decode_bitset(struct tcb *tcp, long arg, const struct xlat decode_nr[],
 	      const unsigned int max_nr, const char *dflt)
 {
 	if (!verbose(tcp))
 		return 0;

 	unsigned int size;
 	if ((unsigned long) tcp->u_rval > max_nr)
 		size = max_nr;
 	else
 		size = tcp->u_rval;
 	char decoded_arg[size];

 	if (umoven(tcp, arg, size, decoded_arg) < 0)
 		return 0;

 	tprints(", [");

 	int bit_displayed = 0;
 	int i = next_set_bit(decoded_arg, 0, size);
 	if (i < 0) {
 		tprints(" 0 ");
 	} else {
 		printxval(decode_nr, i, dflt);

 		while ((i = next_set_bit(decoded_arg, i + 1, size)) > 0) {
 			if (abbrev(tcp) && bit_displayed >= 3) {
 				tprints(", ...");
 				break;
 			}
 			tprints(", ");
 			printxval(decode_nr, i, dflt);
 			bit_displayed++;
 		}
 	}

 	tprints("]");

 	return 1;
 }

 #ifdef EVIOCGMTSLOTS
 static int
 mtslots_ioctl(struct tcb *tcp, const unsigned int code, long arg)
 {
 	const size_t size = _IOC_SIZE(code) / sizeof(int32_t);
 	if (!size)
 		return 0;

 	int32_t buffer[size];

 	if (!verbose(tcp) || umove(tcp, arg, &buffer) < 0)
 		return 0;

 	tprints(", {code=");
 	printxval(evdev_mtslots, buffer[0], "ABS_MT_???");

 	unsigned int i;
 	tprints(", values=[");

 	for (i = 1; i < ARRAY_SIZE(buffer); i++)
 		tprintf("%s%d", i > 1 ? ", " : "", buffer[i]);

 	tprints("]}");
 	return 1;
 }
 #endif /* EVIOCGMTSLOTS */

 #if defined EVIOCGREP || defined EVIOCSREP
 static int
 repeat_ioctl(struct tcb *tcp, long arg)
 {
 	tprints(", ");
 	printpair_int(tcp, arg, "%u");
 	return 1;
 }
 #endif /* EVIOCGREP || EVIOCSREP */

 static int
 evdev_read_ioctl(struct tcb *tcp, const unsigned int code, long arg)
 {
 	if (entering(tcp))
 		return 1;

 	if (syserror(tcp))
 		return 0;

 	if ((_IOC_NR(code) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0))) {
 		switch (_IOC_NR(code) - 0x20) {
 			case EV_SYN:
 				return decode_bitset(tcp, arg, evdev_sync,
 						SYN_MAX, "SYN_???");
 			case EV_KEY:
 				return decode_bitset(tcp, arg, evdev_keycode,
 						KEY_MAX, "KEY_???");
 			case EV_REL:
 				return decode_bitset(tcp, arg, evdev_relative_axes,
 						REL_MAX, "REL_???");
 			case EV_ABS:
 				return decode_bitset(tcp, arg,
 						evdev_abs, ABS_MAX, "ABS_???");
 			case EV_MSC:
 				return decode_bitset(tcp, arg,
 						evdev_misc, MSC_MAX, "MSC_???");
 #ifdef EV_SW
 			case EV_SW:
 				return decode_bitset(tcp, arg,
 						evdev_switch, SW_MAX, "SW_???");
 #endif
 			case EV_LED:
 				return decode_bitset(tcp, arg,
 						evdev_leds, LED_MAX, "LED_???");
 			case EV_SND:
 				return decode_bitset(tcp, arg,
 						evdev_snd, SND_MAX, "SND_???");
 			case EV_REP:
 				return decode_bitset(tcp, arg, evdev_autorepeat,
 						REP_MAX, "REP_???");
 			case EV_FF:
 				return decode_bitset(tcp, arg, evdev_ff_types,
 						FF_MAX, "FF_???");
 			case EV_PWR:
 				printnum_int(tcp, arg, "%d");
 				return 1;
 			case EV_FF_STATUS:
 				return decode_bitset(tcp, arg, evdev_ff_status,
 						FF_STATUS_MAX, "FF_STATUS_???");
 			default:
 				return 0;
 		}
 	}

 	if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0)))
 		return abs_ioctl(tcp, arg);

 	switch (code) {
 		case EVIOCGVERSION:
 			tprints(", ");
 			printnum_int(tcp, arg, "%" PRIx32);
 			return 1;
 		case EVIOCGEFFECTS:
 			tprints(", ");
 			printnum_int(tcp, arg, "%" PRIu32);
 			return 1;
 		case EVIOCGID:
 			return getid_ioctl(tcp, arg);
 #ifdef EVIOCGREP
 		case EVIOCGREP:
 			return repeat_ioctl(tcp, arg);;
 #endif
 		case EVIOCGKEYCODE:
 			return keycode_ioctl(tcp, arg);
 #ifdef EVIOCGKEYCODE_V2
 		case EVIOCGKEYCODE_V2:
 			return keycode_V2_ioctl(tcp, arg);
 #endif
 	}

 	switch (_IOC_NR(code)) {
 #ifdef EVIOCGMTSLOTS
 		case _IOC_NR(EVIOCGMTSLOTS(0)):
 			return mtslots_ioctl(tcp, code, arg);
 #endif
 		case _IOC_NR(EVIOCGNAME(0)):
 		case _IOC_NR(EVIOCGPHYS(0)):
 		case _IOC_NR(EVIOCGUNIQ(0)):
 			tprints(", ");
 			printstr(tcp, arg, tcp->u_rval - 1);
 			return 1;
 #ifdef EVIOCGPROP
 		case _IOC_NR(EVIOCGPROP(0)):
 			return decode_bitset(tcp, arg,
 					evdev_prop, INPUT_PROP_MAX, "PROP_???");
 #endif
 		case _IOC_NR(EVIOCGSND(0)):
 			return decode_bitset(tcp, arg,
 					evdev_snd, SND_MAX, "SND_???");
 #ifdef EVIOCGSW
 		case _IOC_NR(EVIOCGSW(0)):
 			return decode_bitset(tcp, arg,
 					evdev_switch, SW_MAX, "SW_???");
 #endif
 		case _IOC_NR(EVIOCGKEY(0)):
 			return decode_bitset(tcp, arg,
 					evdev_keycode, KEY_MAX, "KEY_???");
 		case _IOC_NR(EVIOCGLED(0)):
 			return decode_bitset(tcp, arg,
 					evdev_leds, LED_MAX, "LED_???");
 		default:
 			return 0;
 	}
 }

 static int
 evdev_write_ioctl(struct tcb *tcp, const unsigned int code, long arg)
 {
 	if (exiting(tcp))
 		return 1;

 	if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0)))
 		return abs_ioctl(tcp, arg);

 	switch (code) {
 #ifdef EVIOCSREP
 		case EVIOCSREP:
 			return repeat_ioctl(tcp, arg);
 #endif
 		case EVIOCSKEYCODE:
 			return keycode_ioctl(tcp, arg);
 #ifdef EVIOCSKEYCODE_V2
 		case EVIOCSKEYCODE_V2:
 			return keycode_V2_ioctl(tcp, arg);
 #endif
 		case EVIOCSFF:
 			return ff_effect_ioctl(tcp, arg);
 		case EVIOCRMFF:
 #ifdef EVIOCSCLOCKID
 		case EVIOCSCLOCKID:
 #endif
 		case EVIOCGRAB:
 #ifdef EVIOCREVOKE
 		case EVIOCREVOKE:
 #endif
 			tprints(", ");
 			printnum_int(tcp, arg, "%u");
 			return 1;
 		default:
 			return 0;
 	}
 }

 int
 evdev_ioctl(struct tcb *tcp, const unsigned int code, long arg)
 {
 	switch(_IOC_DIR(code)) {
 		case _IOC_READ:
 			return evdev_read_ioctl(tcp, code, arg);
 		case _IOC_WRITE:
 			if (!evdev_write_ioctl(tcp, code, arg))
 				tprintf(", %lx", arg);
 			return 1;
 		default:
 			return 0;
 	}
 }

 #endif /* HAVE_LINUX_INPUT_H */
	/*
	* Copyright (c) 2015 Etienne Gemsa <etienne.gemsa@lse.epita.fr>
	* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. The name of the author may not be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "defs.h"

	#include <linux/ioctl.h>

	#ifdef HAVE_LINUX_INPUT_H
	#include <linux/input.h>
	#include "xlat/evdev_abs.h"
	#include "xlat/evdev_autorepeat.h"
	#include "xlat/evdev_ff_status.h"
	#include "xlat/evdev_ff_types.h"
	#include "xlat/evdev_keycode.h"
	#include "xlat/evdev_leds.h"
	#include "xlat/evdev_misc.h"
	#include "xlat/evdev_mtslots.h"
	#include "xlat/evdev_prop.h"
	#include "xlat/evdev_relative_axes.h"
	#include "xlat/evdev_snd.h"
	#include "xlat/evdev_switch.h"
	#include "xlat/evdev_sync.h"

	#ifndef SYN_MAX
	# define SYN_MAX 0xf
	#endif

	static void
	decode_envelope(struct ff_envelope *envelope)
	{
	tprintf(", envelope={attack_length=%" PRIu16 ", attack_level=%" PRIu16
	", fade_length=%" PRIu16 ", fade_level=%" PRIx32 "}",
	envelope->attack_length,
	envelope->attack_level,
	envelope->fade_length,
	envelope->fade_level);
	}

	static int
	ff_effect_ioctl(struct tcb *tcp, long arg)
	{
	struct ff_effect ffe;

	if (!verbose(tcp) \|\| umove(tcp, arg, &ffe) < 0)
	return 0;

	tprints(", {type=");
	printxval(evdev_ff_types, ffe.type, "FF_???");
	tprintf(", id=%" PRIu16 ", direction=%" PRIu16,
	ffe.id, ffe.direction);

	if (!abbrev(tcp)) {
	tprintf(", trigger={button=%" PRIu16 ", interval=%" PRIu16 "}",
	ffe.trigger.button, ffe.trigger.interval);
	tprintf(", replay={lenght=%" PRIu16 ", delay=%" PRIu16 "}",
	ffe.replay.length, ffe.replay.delay);
	switch (ffe.type) {
	case FF_CONSTANT:
	tprintf(", constant_ef={%" PRIi16,
	ffe.u.constant.level);
	decode_envelope(&ffe.u.constant.envelope);
	tprints("}");
	return 1;
	case FF_RAMP:
	tprintf(", ramp={start_level=%" PRIi16
	", end_level=%" PRIi16,
	ffe.u.ramp.start_level,
	ffe.u.ramp.end_level);
	decode_envelope(&ffe.u.ramp.envelope);
	tprints("}");
	return 1;
	case FF_PERIODIC:
	tprintf(", periodic_ef={waveform=%" PRIu16
	", period=%" PRIu16
	", magnitude=%" PRIi16
	", offset=%" PRIi16
	", phase=%" PRIu16,
	ffe.u.periodic.waveform,
	ffe.u.periodic.period,
	ffe.u.periodic.magnitude,
	ffe.u.periodic.offset,
	ffe.u.periodic.phase);
	decode_envelope(&ffe.u.periodic.envelope);
	tprintf(", custom_len=%" PRIu32
	", *custom_data=%#lx}",
	ffe.u.periodic.custom_len,
	(unsigned long)ffe.u.periodic.custom_data);
	return 1;
	case FF_RUMBLE:
	tprintf(", rumble={strong_magnitude=%" PRIu16
	", weak_magnitude=%" PRIu16 "}",
	ffe.u.rumble.strong_magnitude,
	ffe.u.rumble.weak_magnitude);
	return 1;
	case FF_SPRING:
	case FF_FRICTION:
	case FF_DAMPER:
	case FF_INERTIA:
	case FF_CUSTOM:
	break;
	default :
	break;
	}
	}

	tprints(", ...}");
	return 1;
	}

	static int
	abs_ioctl(struct tcb *tcp, long arg)
	{
	struct input_absinfo absinfo;

	if (!verbose(tcp) \|\| umove(tcp, arg, &absinfo) < 0)
	return 0;

	tprintf(", {value=%" PRIu32 ", minimum=%" PRIu32,
	absinfo.value, absinfo.minimum);
	if (!abbrev(tcp)) {
	tprintf(", maximum=%" PRIu32 ", fuzz=%" PRIu32,
	absinfo.maximum, absinfo.fuzz);
	tprintf(", flat=%" PRIu32, absinfo.flat);
	#ifdef HAVE_STRUCT_INPUT_ABSINFO_RESOLUTION
	tprintf(", resolution=%" PRIu32, absinfo.resolution);
	#endif
	tprints("}");
	} else {
	tprints(", ...}");
	}
	return 1;
	}

	static int
	keycode_ioctl(struct tcb *tcp, long arg)
	{
	unsigned int keycode[2];

	if (!arg) {
	tprints(", NULL");
	return 1;
	}

	if (!verbose(tcp) \|\| umove(tcp, arg, &keycode) < 0)
	return 0;

	tprintf(", [%u, ", keycode[0]);
	printxval(evdev_keycode, keycode[1], "KEY_???");
	tprints("]");
	return 1;
	}

	#ifdef EVIOCGKEYCODE_V2
	static int
	keycode_V2_ioctl(struct tcb *tcp, long arg)
	{
	struct input_keymap_entry ike;

	if (!arg) {
	tprints(", NULL");
	return 1;
	}

	if (!verbose(tcp) \|\| umove(tcp, arg, &ike) < 0)
	return 0;

	tprintf(", {flags=%" PRIu8 ", len=%" PRIu8, ike.flags, ike.len);
	if (!abbrev(tcp)) {
	unsigned int i;

	tprintf(", index=%" PRIu16 ", keycode=", ike.index);
	printxval(evdev_keycode, ike.keycode, "KEY_???");
	tprints(", scancode=[");
	for (i = 0; i < ARRAY_SIZE(ike.scancode); i++) {
	if (i > 0)
	tprints(", ");
	tprintf("%" PRIx8, ike.scancode[i]);
	}
	tprints("]}");
	} else {
	tprints(", ...}");
	}
	return 1;
	}
	#endif /* EVIOCGKEYCODE_V2 */

	static int
	getid_ioctl(struct tcb *tcp, long arg)
	{
	struct input_id id;

	if (!verbose(tcp) \|\| umove(tcp, arg, &id) < 0)
	return 0;

	tprintf(", {ID_BUS=%" PRIu16 ", ID_VENDOR=%" PRIu16,
	id.bustype, id.vendor);
	if (!abbrev(tcp)) {
	tprintf(", ID_PRODUCT=%" PRIu16 ", ID_VERSION=%" PRIu16 "}",
	id.product, id.version);
	} else {
	tprints(", ...}");
	}
	return 1;
	}

	static int
	decode_bitset(struct tcb *tcp, long arg, const struct xlat decode_nr[],
	const unsigned int max_nr, const char *dflt)
	{
	if (!verbose(tcp))
	return 0;

	unsigned int size;
	if ((unsigned long) tcp->u_rval > max_nr)
	size = max_nr;
	else
	size = tcp->u_rval;
	char decoded_arg[size];

	if (umoven(tcp, arg, size, decoded_arg) < 0)
	return 0;

	tprints(", [");

	int bit_displayed = 0;
	int i = next_set_bit(decoded_arg, 0, size);
	if (i < 0) {
	tprints(" 0 ");
	} else {
	printxval(decode_nr, i, dflt);

	while ((i = next_set_bit(decoded_arg, i + 1, size)) > 0) {
	if (abbrev(tcp) && bit_displayed >= 3) {
	tprints(", ...");
	break;
	}
	tprints(", ");
	printxval(decode_nr, i, dflt);
	bit_displayed++;
	}
	}

	tprints("]");

	return 1;
	}

	#ifdef EVIOCGMTSLOTS
	static int
	mtslots_ioctl(struct tcb *tcp, const unsigned int code, long arg)
	{
	const size_t size = _IOC_SIZE(code) / sizeof(int32_t);
	if (!size)
	return 0;

	int32_t buffer[size];

	if (!verbose(tcp) \|\| umove(tcp, arg, &buffer) < 0)
	return 0;

	tprints(", {code=");
	printxval(evdev_mtslots, buffer[0], "ABS_MT_???");

	unsigned int i;
	tprints(", values=[");

	for (i = 1; i < ARRAY_SIZE(buffer); i++)
	tprintf("%s%d", i > 1 ? ", " : "", buffer[i]);

	tprints("]}");
	return 1;
	}
	#endif /* EVIOCGMTSLOTS */

	#if defined EVIOCGREP \|\| defined EVIOCSREP
	static int
	repeat_ioctl(struct tcb *tcp, long arg)
	{
	tprints(", ");
	printpair_int(tcp, arg, "%u");
	return 1;
	}
	#endif /* EVIOCGREP \|\| EVIOCSREP */

	static int
	evdev_read_ioctl(struct tcb *tcp, const unsigned int code, long arg)
	{
	if (entering(tcp))
	return 1;

	if (syserror(tcp))
	return 0;

	if ((_IOC_NR(code) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0))) {
	switch (_IOC_NR(code) - 0x20) {
	case EV_SYN:
	return decode_bitset(tcp, arg, evdev_sync,
	SYN_MAX, "SYN_???");
	case EV_KEY:
	return decode_bitset(tcp, arg, evdev_keycode,
	KEY_MAX, "KEY_???");
	case EV_REL:
	return decode_bitset(tcp, arg, evdev_relative_axes,
	REL_MAX, "REL_???");
	case EV_ABS:
	return decode_bitset(tcp, arg,
	evdev_abs, ABS_MAX, "ABS_???");
	case EV_MSC:
	return decode_bitset(tcp, arg,
	evdev_misc, MSC_MAX, "MSC_???");
	#ifdef EV_SW
	case EV_SW:
	return decode_bitset(tcp, arg,
	evdev_switch, SW_MAX, "SW_???");
	#endif
	case EV_LED:
	return decode_bitset(tcp, arg,
	evdev_leds, LED_MAX, "LED_???");
	case EV_SND:
	return decode_bitset(tcp, arg,
	evdev_snd, SND_MAX, "SND_???");
	case EV_REP:
	return decode_bitset(tcp, arg, evdev_autorepeat,
	REP_MAX, "REP_???");
	case EV_FF:
	return decode_bitset(tcp, arg, evdev_ff_types,
	FF_MAX, "FF_???");
	case EV_PWR:
	printnum_int(tcp, arg, "%d");
	return 1;
	case EV_FF_STATUS:
	return decode_bitset(tcp, arg, evdev_ff_status,
	FF_STATUS_MAX, "FF_STATUS_???");
	default:
	return 0;
	}
	}

	if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0)))
	return abs_ioctl(tcp, arg);

	switch (code) {
	case EVIOCGVERSION:
	tprints(", ");
	printnum_int(tcp, arg, "%" PRIx32);
	return 1;
	case EVIOCGEFFECTS:
	tprints(", ");
	printnum_int(tcp, arg, "%" PRIu32);
	return 1;
	case EVIOCGID:
	return getid_ioctl(tcp, arg);
	#ifdef EVIOCGREP
	case EVIOCGREP:
	return repeat_ioctl(tcp, arg);;
	#endif
	case EVIOCGKEYCODE:
	return keycode_ioctl(tcp, arg);
	#ifdef EVIOCGKEYCODE_V2
	case EVIOCGKEYCODE_V2:
	return keycode_V2_ioctl(tcp, arg);
	#endif
	}

	switch (_IOC_NR(code)) {
	#ifdef EVIOCGMTSLOTS
	case _IOC_NR(EVIOCGMTSLOTS(0)):
	return mtslots_ioctl(tcp, code, arg);
	#endif
	case _IOC_NR(EVIOCGNAME(0)):
	case _IOC_NR(EVIOCGPHYS(0)):
	case _IOC_NR(EVIOCGUNIQ(0)):
	tprints(", ");
	printstr(tcp, arg, tcp->u_rval - 1);
	return 1;
	#ifdef EVIOCGPROP
	case _IOC_NR(EVIOCGPROP(0)):
	return decode_bitset(tcp, arg,
	evdev_prop, INPUT_PROP_MAX, "PROP_???");
	#endif
	case _IOC_NR(EVIOCGSND(0)):
	return decode_bitset(tcp, arg,
	evdev_snd, SND_MAX, "SND_???");
	#ifdef EVIOCGSW
	case _IOC_NR(EVIOCGSW(0)):
	return decode_bitset(tcp, arg,
	evdev_switch, SW_MAX, "SW_???");
	#endif
	case _IOC_NR(EVIOCGKEY(0)):
	return decode_bitset(tcp, arg,
	evdev_keycode, KEY_MAX, "KEY_???");
	case _IOC_NR(EVIOCGLED(0)):
	return decode_bitset(tcp, arg,
	evdev_leds, LED_MAX, "LED_???");
	default:
	return 0;
	}
	}

	static int
	evdev_write_ioctl(struct tcb *tcp, const unsigned int code, long arg)
	{
	if (exiting(tcp))
	return 1;

	if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0)))
	return abs_ioctl(tcp, arg);

	switch (code) {
	#ifdef EVIOCSREP
	case EVIOCSREP:
	return repeat_ioctl(tcp, arg);
	#endif
	case EVIOCSKEYCODE:
	return keycode_ioctl(tcp, arg);
	#ifdef EVIOCSKEYCODE_V2
	case EVIOCSKEYCODE_V2:
	return keycode_V2_ioctl(tcp, arg);
	#endif
	case EVIOCSFF:
	return ff_effect_ioctl(tcp, arg);
	case EVIOCRMFF:
	#ifdef EVIOCSCLOCKID
	case EVIOCSCLOCKID:
	#endif
	case EVIOCGRAB:
	#ifdef EVIOCREVOKE
	case EVIOCREVOKE:
	#endif
	tprints(", ");
	printnum_int(tcp, arg, "%u");
	return 1;
	default:
	return 0;
	}
	}

	int
	evdev_ioctl(struct tcb *tcp, const unsigned int code, long arg)
	{
	switch(_IOC_DIR(code)) {
	case _IOC_READ:
	return evdev_read_ioctl(tcp, code, arg);
	case _IOC_WRITE:
	if (!evdev_write_ioctl(tcp, code, arg))
	tprintf(", %lx", arg);
	return 1;
	default:
	return 0;
	}
	}

	#endif /* HAVE_LINUX_INPUT_H */