[thirdparty/systemd.git] / src / udev / udev-builtin-keyboard.c

/***
  This file is part of systemd.

  Copyright 2013 Kay Sievers <kay@vrfy.org>

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <linux/input.h>

#include "fd-util.h"
#include "parse-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "udev.h"

static const struct key *keyboard_lookup_key(const char *str, unsigned len);
#include "keyboard-keys-from-name.h"

static int install_force_release(struct udev_device *dev, const unsigned *release, unsigned release_count) {
        struct udev_device *atkbd;
        const char *cur;
        char codes[4096];
        char *s;
        size_t l;
        unsigned i;
        int ret;

        assert(dev);
        assert(release);

        atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
        if (!atkbd)
                return -ENODEV;

        cur = udev_device_get_sysattr_value(atkbd, "force_release");
        if (!cur)
                return -ENODEV;

        s = codes;
        l = sizeof(codes);

        /* copy current content */
        l = strpcpy(&s, l, cur);

        /* append new codes */
        for (i = 0; i < release_count; i++)
                l = strpcpyf(&s, l, ",%u", release[i]);

        log_debug("keyboard: updating force-release list with '%s'", codes);
        ret = udev_device_set_sysattr_value(atkbd, "force_release", codes);
        if (ret < 0)
                log_error_errno(ret, "Error writing force-release attribute: %m");
        return ret;
}

static void map_keycode(int fd, const char *devnode, int scancode, const char *keycode)
{
        struct {
                unsigned scan;
                unsigned key;
        } map;
        char *endptr;
        const struct key *k;
        unsigned keycode_num;

        /* translate identifier to key code */
        k = keyboard_lookup_key(keycode, strlen(keycode));
        if (k) {
                keycode_num = k->id;
        } else {
                /* check if it's a numeric code already */
                keycode_num = strtoul(keycode, &endptr, 0);
                if (endptr[0] !='\0') {
                        log_error("Unknown key identifier '%s'", keycode);
                        return;
                }
        }

        map.scan = scancode;
        map.key = keycode_num;

        log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
                  map.scan, map.scan, map.key, map.key);

        if (ioctl(fd, EVIOCSKEYCODE, &map) < 0)
                log_error_errno(errno, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", devnode, map.scan, map.key);
}

static inline char* parse_token(const char *current, int32_t *val_out) {
        char *next;
        int32_t val;

        if (!current)
                return NULL;

        val = strtol(current, &next, 0);
        if (*next && *next != ':')
                return NULL;

        if (next != current)
                *val_out = val;

        if (*next)
                next++;

        return next;
}

static void override_abs(int fd, const char *devnode,
                         unsigned evcode, const char *value) {
        struct input_absinfo absinfo;
        int rc;
        char *next;

        rc = ioctl(fd, EVIOCGABS(evcode), &absinfo);
        if (rc < 0) {
                log_error_errno(errno, "Unable to EVIOCGABS device \"%s\"", devnode);
                return;
        }

        next = parse_token(value, &absinfo.minimum);
        next = parse_token(next, &absinfo.maximum);
        next = parse_token(next, &absinfo.resolution);
        next = parse_token(next, &absinfo.fuzz);
        next = parse_token(next, &absinfo.flat);
        if (!next) {
                log_error("Unable to parse EV_ABS override '%s' for '%s'", value, devnode);
                return;
        }

        log_debug("keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32" for \"%s\"",
                  evcode,
                  absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat,
                  devnode);
        rc = ioctl(fd, EVIOCSABS(evcode), &absinfo);
        if (rc < 0)
                log_error_errno(errno, "Unable to EVIOCSABS device \"%s\"", devnode);
}

static void set_trackpoint_sensitivity(struct udev_device *dev, const char *value)
{
        struct udev_device *pdev;
        char val_s[DECIMAL_STR_MAX(int)];
        int r, val_i;

        assert(dev);
        assert(value);

        /* The sensitivity sysfs attr belongs to the serio parent device */
        pdev = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
        if (!pdev) {
                log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev));
                return;
        }

        r = safe_atoi(value, &val_i);
        if (r < 0) {
                log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value, udev_device_get_devnode(dev));
                return;
        }

        xsprintf(val_s, "%d", val_i);

        r = udev_device_set_sysattr_value(pdev, "sensitivity", val_s);
        if (r < 0)
                log_error_errno(r, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev));
}

static int open_device(const char *devnode) {
        int fd;

        fd = open(devnode, O_RDWR|O_CLOEXEC|O_NONBLOCK|O_NOCTTY);
        if (fd < 0)
                return log_error_errno(errno, "Error opening device \"%s\": %m", devnode);

        return fd;
}

static int builtin_keyboard(struct udev_device *dev, int argc, char *argv[], bool test) {
        struct udev_list_entry *entry;
        unsigned release[1024];
        unsigned release_count = 0;
        _cleanup_close_ int fd = -1;
        const char *node;

        node = udev_device_get_devnode(dev);
        if (!node) {
                log_error("No device node for \"%s\"", udev_device_get_syspath(dev));
                return EXIT_FAILURE;
        }

        udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
                const char *key;
                char *endptr;

                key = udev_list_entry_get_name(entry);
                if (startswith(key, "KEYBOARD_KEY_")) {
                        const char *keycode;
                        unsigned scancode;

                        /* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
                        scancode = strtoul(key + 13, &endptr, 16);
                        if (endptr[0] != '\0') {
                                log_warning("Unable to parse scan code from \"%s\"", key);
                                continue;
                        }

                        keycode = udev_list_entry_get_value(entry);

                        /* a leading '!' needs a force-release entry */
                        if (keycode[0] == '!') {
                                keycode++;

                                release[release_count] = scancode;
                                if (release_count <  ELEMENTSOF(release)-1)
                                        release_count++;

                                if (keycode[0] == '\0')
                                        continue;
                        }

                        if (fd == -1) {
                                fd = open_device(node);
                                if (fd < 0)
                                        return EXIT_FAILURE;
                        }

                        map_keycode(fd, node, scancode, keycode);
                } else if (startswith(key, "EVDEV_ABS_")) {
                        unsigned evcode;

                        /* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
                        evcode = strtoul(key + 10, &endptr, 16);
                        if (endptr[0] != '\0') {
                                log_warning("Unable to parse EV_ABS code from \"%s\"", key);
                                continue;
                        }

                        if (fd == -1) {
                                fd = open_device(node);
                                if (fd < 0)
                                        return EXIT_FAILURE;
                        }

                        override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
                } else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
                        set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
        }

        /* install list of force-release codes */
        if (release_count > 0)
                install_force_release(dev, release, release_count);

        return EXIT_SUCCESS;
}

const struct udev_builtin udev_builtin_keyboard = {
        .name = "keyboard",
        .cmd = builtin_keyboard,
        .help = "Keyboard scan code to key mapping",
};
Commit	Line	Data
9d7d42bc KS	1	/***
	2	This file is part of systemd.
	3
	4	Copyright 2013 Kay Sievers <kay@vrfy.org>
	5
	6	systemd is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU Lesser General Public License as published by
	8	the Free Software Foundation; either version 2.1 of the License, or
	9	(at your option) any later version.
	10
	11	systemd is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public License
	17	along with systemd; If not, see <http://www.gnu.org/licenses/>.
	18	***/
	19
	20	#include <stdio.h>
9d7d42bc	21	#include <stdlib.h>
07630cea	22	#include <string.h>
9d7d42bc	23	#include <sys/ioctl.h>
9d7d42bc KS	24	#include <linux/input.h>
9d7d42bc KS	25
3ffd4af2	26	#include "fd-util.h"
6bedfcbb	27	#include "parse-util.h"
15a5e950	28	#include "stdio-util.h"
07630cea	29	#include "string-util.h"
9d7d42bc KS	30	#include "udev.h"
9d7d42bc KS	31
1fa2f38f	32	static const struct key keyboard_lookup_key(const char str, unsigned len);
9d7d42bc	33	#include "keyboard-keys-from-name.h"
9d7d42bc	34
1fa2f38f	35	static int install_force_release(struct udev_device dev, const unsigned release, unsigned release_count) {
9d7d42bc KS	36	struct udev_device *atkbd;
	37	const char *cur;
	38	char codes[4096];
	39	char *s;
	40	size_t l;
1fa2f38f	41	unsigned i;
9d7d42bc KS	42	int ret;
9d7d42bc KS	43
3b64e4d4 TG	44	assert(dev);
	45	assert(release);
	46
9d7d42bc KS	47	atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
	48	if (!atkbd)
	49	return -ENODEV;
	50
	51	cur = udev_device_get_sysattr_value(atkbd, "force_release");
	52	if (!cur)
	53	return -ENODEV;
	54
	55	s = codes;
	56	l = sizeof(codes);
	57
	58	/* copy current content */
	59	l = strpcpy(&s, l, cur);
	60
	61	/* append new codes */
	62	for (i = 0; i < release_count; i++)
1fa2f38f	63	l = strpcpyf(&s, l, ",%u", release[i]);
9d7d42bc	64
9f6445e3	65	log_debug("keyboard: updating force-release list with '%s'", codes);
9d7d42bc KS	66	ret = udev_device_set_sysattr_value(atkbd, "force_release", codes);
9d7d42bc KS	67	if (ret < 0)
da927ba9	68	log_error_errno(ret, "Error writing force-release attribute: %m");
9d7d42bc KS	69	return ret;
	70	}
	71
c9a8e340 PH	72	static void map_keycode(int fd, const char devnode, int scancode, const char keycode)
c9a8e340 PH	73	{
9d7d42bc	74	struct {
1fa2f38f ZJS	75	unsigned scan;
1fa2f38f ZJS	76	unsigned key;
cfba2656	77	} map;
c9a8e340 PH	78	char *endptr;
	79	const struct key *k;
	80	unsigned keycode_num;
	81
	82	/* translate identifier to key code */
	83	k = keyboard_lookup_key(keycode, strlen(keycode));
	84	if (k) {
	85	keycode_num = k->id;
	86	} else {
	87	/* check if it's a numeric code already */
	88	keycode_num = strtoul(keycode, &endptr, 0);
	89	if (endptr[0] !='\0') {
c89280f8	90	log_error("Unknown key identifier '%s'", keycode);
c9a8e340 PH	91	return;
	92	}
	93	}
	94
	95	map.scan = scancode;
	96	map.key = keycode_num;
	97
	98	log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
	99	map.scan, map.scan, map.key, map.key);
	100
	101	if (ioctl(fd, EVIOCSKEYCODE, &map) < 0)
	102	log_error_errno(errno, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", devnode, map.scan, map.key);
	103	}
	104
51c0c286 PH	105	static inline char* parse_token(const char current, int32_t val_out) {
	106	char *next;
	107	int32_t val;
	108
	109	if (!current)
	110	return NULL;
	111
	112	val = strtol(current, &next, 0);
	113	if (next && next != ':')
	114	return NULL;
	115
	116	if (next != current)
	117	*val_out = val;
	118
	119	if (*next)
	120	next++;
	121
	122	return next;
	123	}
	124
	125	static void override_abs(int fd, const char *devnode,
	126	unsigned evcode, const char *value) {
	127	struct input_absinfo absinfo;
	128	int rc;
	129	char *next;
	130
	131	rc = ioctl(fd, EVIOCGABS(evcode), &absinfo);
	132	if (rc < 0) {
c89280f8	133	log_error_errno(errno, "Unable to EVIOCGABS device \"%s\"", devnode);
51c0c286 PH	134	return;
	135	}
	136
	137	next = parse_token(value, &absinfo.minimum);
	138	next = parse_token(next, &absinfo.maximum);
	139	next = parse_token(next, &absinfo.resolution);
	140	next = parse_token(next, &absinfo.fuzz);
	141	next = parse_token(next, &absinfo.flat);
	142	if (!next) {
c89280f8	143	log_error("Unable to parse EV_ABS override '%s' for '%s'", value, devnode);
51c0c286 PH	144	return;
	145	}
	146
ff9b60f3	147	log_debug("keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32" for \"%s\"",
c89280f8 ZJS	148	evcode,
	149	absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat,
	150	devnode);
51c0c286 PH	151	rc = ioctl(fd, EVIOCSABS(evcode), &absinfo);
51c0c286 PH	152	if (rc < 0)
c89280f8	153	log_error_errno(errno, "Unable to EVIOCSABS device \"%s\"", devnode);
51c0c286 PH	154	}
51c0c286 PH	155
5defbb5f HG	156	static void set_trackpoint_sensitivity(struct udev_device dev, const char value)
	157	{
	158	struct udev_device *pdev;
	159	char val_s[DECIMAL_STR_MAX(int)];
	160	int r, val_i;
	161
3b64e4d4 TG	162	assert(dev);
	163	assert(value);
	164
5defbb5f HG	165	/* The sensitivity sysfs attr belongs to the serio parent device */
	166	pdev = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
	167	if (!pdev) {
	168	log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev));
	169	return;
	170	}
	171
	172	r = safe_atoi(value, &val_i);
	173	if (r < 0) {
	174	log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value, udev_device_get_devnode(dev));
	175	return;
	176	}
	177
	178	xsprintf(val_s, "%d", val_i);
	179
	180	r = udev_device_set_sysattr_value(pdev, "sensitivity", val_s);
	181	if (r < 0)
	182	log_error_errno(r, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev));
	183	}
	184
51c0c286 PH	185	static int open_device(const char *devnode) {
	186	int fd;
	187
	188	fd = open(devnode, O_RDWR\|O_CLOEXEC\|O_NONBLOCK\|O_NOCTTY);
	189	if (fd < 0)
c89280f8	190	return log_error_errno(errno, "Error opening device \"%s\": %m", devnode);
51c0c286	191
c89280f8	192	return fd;
51c0c286 PH	193	}
51c0c286 PH	194
c9a8e340 PH	195	static int builtin_keyboard(struct udev_device dev, int argc, char argv[], bool test) {
c9a8e340 PH	196	struct udev_list_entry *entry;
1fa2f38f ZJS	197	unsigned release[1024];
1fa2f38f ZJS	198	unsigned release_count = 0;
cfba2656	199	_cleanup_close_ int fd = -1;
753bd5c7 PH	200	const char *node;
	201
	202	node = udev_device_get_devnode(dev);
	203	if (!node) {
c89280f8	204	log_error("No device node for \"%s\"", udev_device_get_syspath(dev));
753bd5c7 PH	205	return EXIT_FAILURE;
753bd5c7 PH	206	}
9d7d42bc KS	207
	208	udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
	209	const char *key;
9d7d42bc	210	char *endptr;
9d7d42bc KS	211
9d7d42bc KS	212	key = udev_list_entry_get_name(entry);
8a0fd83c PH	213	if (startswith(key, "KEYBOARD_KEY_")) {
	214	const char *keycode;
	215	unsigned scancode;
	216
	217	/* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
	218	scancode = strtoul(key + 13, &endptr, 16);
	219	if (endptr[0] != '\0') {
c89280f8	220	log_warning("Unable to parse scan code from \"%s\"", key);
8a0fd83c PH	221	continue;
8a0fd83c PH	222	}
9d7d42bc	223
8a0fd83c	224	keycode = udev_list_entry_get_value(entry);
9d7d42bc	225
8a0fd83c PH	226	/* a leading '!' needs a force-release entry */
	227	if (keycode[0] == '!') {
	228	keycode++;
9d7d42bc	229
8a0fd83c PH	230	release[release_count] = scancode;
	231	if (release_count < ELEMENTSOF(release)-1)
	232	release_count++;
9d7d42bc	233
8a0fd83c PH	234	if (keycode[0] == '\0')
	235	continue;
	236	}
9d7d42bc	237
8a0fd83c	238	if (fd == -1) {
51c0c286 PH	239	fd = open_device(node);
51c0c286 PH	240	if (fd < 0)
8a0fd83c	241	return EXIT_FAILURE;
cfba2656	242	}
9d7d42bc	243
8a0fd83c	244	map_keycode(fd, node, scancode, keycode);
51c0c286 PH	245	} else if (startswith(key, "EVDEV_ABS_")) {
	246	unsigned evcode;
	247
	248	/* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
	249	evcode = strtoul(key + 10, &endptr, 16);
	250	if (endptr[0] != '\0') {
c89280f8	251	log_warning("Unable to parse EV_ABS code from \"%s\"", key);
51c0c286 PH	252	continue;
	253	}
	254
	255	if (fd == -1) {
	256	fd = open_device(node);
	257	if (fd < 0)
	258	return EXIT_FAILURE;
	259	}
	260
	261	override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
1f6b4113	262	} else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
5defbb5f	263	set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
9d7d42bc KS	264	}
9d7d42bc KS	265
cfba2656 PH	266	/* install list of force-release codes */
	267	if (release_count > 0)
	268	install_force_release(dev, release, release_count);
	269
9d7d42bc KS	270	return EXIT_SUCCESS;
	271	}
	272
	273	const struct udev_builtin udev_builtin_keyboard = {
	274	.name = "keyboard",
	275	.cmd = builtin_keyboard,
5ac0162c	276	.help = "Keyboard scan code to key mapping",
9d7d42bc	277	};