[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 "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
07630cea	26	#include "string-util.h"
9d7d42bc KS	27	#include "udev.h"
9d7d42bc KS	28
1fa2f38f	29	static const struct key keyboard_lookup_key(const char str, unsigned len);
9d7d42bc	30	#include "keyboard-keys-from-name.h"
9d7d42bc	31
1fa2f38f	32	static int install_force_release(struct udev_device dev, const unsigned release, unsigned release_count) {
9d7d42bc KS	33	struct udev_device *atkbd;
	34	const char *cur;
	35	char codes[4096];
	36	char *s;
	37	size_t l;
1fa2f38f	38	unsigned i;
9d7d42bc KS	39	int ret;
9d7d42bc KS	40
3b64e4d4 TG	41	assert(dev);
	42	assert(release);
	43
9d7d42bc KS	44	atkbd = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
	45	if (!atkbd)
	46	return -ENODEV;
	47
	48	cur = udev_device_get_sysattr_value(atkbd, "force_release");
	49	if (!cur)
	50	return -ENODEV;
	51
	52	s = codes;
	53	l = sizeof(codes);
	54
	55	/* copy current content */
	56	l = strpcpy(&s, l, cur);
	57
	58	/* append new codes */
	59	for (i = 0; i < release_count; i++)
1fa2f38f	60	l = strpcpyf(&s, l, ",%u", release[i]);
9d7d42bc	61
9f6445e3	62	log_debug("keyboard: updating force-release list with '%s'", codes);
9d7d42bc KS	63	ret = udev_device_set_sysattr_value(atkbd, "force_release", codes);
9d7d42bc KS	64	if (ret < 0)
da927ba9	65	log_error_errno(ret, "Error writing force-release attribute: %m");
9d7d42bc KS	66	return ret;
	67	}
	68
c9a8e340 PH	69	static void map_keycode(int fd, const char devnode, int scancode, const char keycode)
c9a8e340 PH	70	{
9d7d42bc	71	struct {
1fa2f38f ZJS	72	unsigned scan;
1fa2f38f ZJS	73	unsigned key;
cfba2656	74	} map;
c9a8e340 PH	75	char *endptr;
	76	const struct key *k;
	77	unsigned keycode_num;
	78
	79	/* translate identifier to key code */
	80	k = keyboard_lookup_key(keycode, strlen(keycode));
	81	if (k) {
	82	keycode_num = k->id;
	83	} else {
	84	/* check if it's a numeric code already */
	85	keycode_num = strtoul(keycode, &endptr, 0);
	86	if (endptr[0] !='\0') {
c89280f8	87	log_error("Unknown key identifier '%s'", keycode);
c9a8e340 PH	88	return;
	89	}
	90	}
	91
	92	map.scan = scancode;
	93	map.key = keycode_num;
	94
	95	log_debug("keyboard: mapping scan code %d (0x%x) to key code %d (0x%x)",
	96	map.scan, map.scan, map.key, map.key);
	97
	98	if (ioctl(fd, EVIOCSKEYCODE, &map) < 0)
	99	log_error_errno(errno, "Error calling EVIOCSKEYCODE on device node '%s' (scan code 0x%x, key code %d): %m", devnode, map.scan, map.key);
	100	}
	101
51c0c286 PH	102	static inline char* parse_token(const char current, int32_t val_out) {
	103	char *next;
	104	int32_t val;
	105
	106	if (!current)
	107	return NULL;
	108
	109	val = strtol(current, &next, 0);
	110	if (next && next != ':')
	111	return NULL;
	112
	113	if (next != current)
	114	*val_out = val;
	115
	116	if (*next)
	117	next++;
	118
	119	return next;
	120	}
	121
	122	static void override_abs(int fd, const char *devnode,
	123	unsigned evcode, const char *value) {
	124	struct input_absinfo absinfo;
	125	int rc;
	126	char *next;
	127
	128	rc = ioctl(fd, EVIOCGABS(evcode), &absinfo);
	129	if (rc < 0) {
c89280f8	130	log_error_errno(errno, "Unable to EVIOCGABS device \"%s\"", devnode);
51c0c286 PH	131	return;
	132	}
	133
	134	next = parse_token(value, &absinfo.minimum);
	135	next = parse_token(next, &absinfo.maximum);
	136	next = parse_token(next, &absinfo.resolution);
	137	next = parse_token(next, &absinfo.fuzz);
	138	next = parse_token(next, &absinfo.flat);
	139	if (!next) {
c89280f8	140	log_error("Unable to parse EV_ABS override '%s' for '%s'", value, devnode);
51c0c286 PH	141	return;
	142	}
	143
ff9b60f3	144	log_debug("keyboard: %x overridden with %"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32"/%"PRIi32" for \"%s\"",
c89280f8 ZJS	145	evcode,
	146	absinfo.minimum, absinfo.maximum, absinfo.resolution, absinfo.fuzz, absinfo.flat,
	147	devnode);
51c0c286 PH	148	rc = ioctl(fd, EVIOCSABS(evcode), &absinfo);
51c0c286 PH	149	if (rc < 0)
c89280f8	150	log_error_errno(errno, "Unable to EVIOCSABS device \"%s\"", devnode);
51c0c286 PH	151	}
51c0c286 PH	152
5defbb5f HG	153	static void set_trackpoint_sensitivity(struct udev_device dev, const char value)
	154	{
	155	struct udev_device *pdev;
	156	char val_s[DECIMAL_STR_MAX(int)];
	157	int r, val_i;
	158
3b64e4d4 TG	159	assert(dev);
	160	assert(value);
	161
5defbb5f HG	162	/* The sensitivity sysfs attr belongs to the serio parent device */
	163	pdev = udev_device_get_parent_with_subsystem_devtype(dev, "serio", NULL);
	164	if (!pdev) {
	165	log_warning("Failed to get serio parent for '%s'", udev_device_get_devnode(dev));
	166	return;
	167	}
	168
	169	r = safe_atoi(value, &val_i);
	170	if (r < 0) {
	171	log_error("Unable to parse POINTINGSTICK_SENSITIVITY '%s' for '%s'", value, udev_device_get_devnode(dev));
	172	return;
	173	}
	174
	175	xsprintf(val_s, "%d", val_i);
	176
	177	r = udev_device_set_sysattr_value(pdev, "sensitivity", val_s);
	178	if (r < 0)
	179	log_error_errno(r, "Failed to write 'sensitivity' attribute for '%s': %m", udev_device_get_devnode(pdev));
	180	}
	181
51c0c286 PH	182	static int open_device(const char *devnode) {
	183	int fd;
	184
	185	fd = open(devnode, O_RDWR\|O_CLOEXEC\|O_NONBLOCK\|O_NOCTTY);
	186	if (fd < 0)
c89280f8	187	return log_error_errno(errno, "Error opening device \"%s\": %m", devnode);
51c0c286	188
c89280f8	189	return fd;
51c0c286 PH	190	}
51c0c286 PH	191
c9a8e340 PH	192	static int builtin_keyboard(struct udev_device dev, int argc, char argv[], bool test) {
c9a8e340 PH	193	struct udev_list_entry *entry;
1fa2f38f ZJS	194	unsigned release[1024];
1fa2f38f ZJS	195	unsigned release_count = 0;
cfba2656	196	_cleanup_close_ int fd = -1;
753bd5c7 PH	197	const char *node;
	198
	199	node = udev_device_get_devnode(dev);
	200	if (!node) {
c89280f8	201	log_error("No device node for \"%s\"", udev_device_get_syspath(dev));
753bd5c7 PH	202	return EXIT_FAILURE;
753bd5c7 PH	203	}
9d7d42bc KS	204
	205	udev_list_entry_foreach(entry, udev_device_get_properties_list_entry(dev)) {
	206	const char *key;
9d7d42bc	207	char *endptr;
9d7d42bc KS	208
9d7d42bc KS	209	key = udev_list_entry_get_name(entry);
8a0fd83c PH	210	if (startswith(key, "KEYBOARD_KEY_")) {
	211	const char *keycode;
	212	unsigned scancode;
	213
	214	/* KEYBOARD_KEY_<hex scan code>=<key identifier string> */
	215	scancode = strtoul(key + 13, &endptr, 16);
	216	if (endptr[0] != '\0') {
c89280f8	217	log_warning("Unable to parse scan code from \"%s\"", key);
8a0fd83c PH	218	continue;
8a0fd83c PH	219	}
9d7d42bc	220
8a0fd83c	221	keycode = udev_list_entry_get_value(entry);
9d7d42bc	222
8a0fd83c PH	223	/* a leading '!' needs a force-release entry */
	224	if (keycode[0] == '!') {
	225	keycode++;
9d7d42bc	226
8a0fd83c PH	227	release[release_count] = scancode;
	228	if (release_count < ELEMENTSOF(release)-1)
	229	release_count++;
9d7d42bc	230
8a0fd83c PH	231	if (keycode[0] == '\0')
	232	continue;
	233	}
9d7d42bc	234
8a0fd83c	235	if (fd == -1) {
51c0c286 PH	236	fd = open_device(node);
51c0c286 PH	237	if (fd < 0)
8a0fd83c	238	return EXIT_FAILURE;
cfba2656	239	}
9d7d42bc	240
8a0fd83c	241	map_keycode(fd, node, scancode, keycode);
51c0c286 PH	242	} else if (startswith(key, "EVDEV_ABS_")) {
	243	unsigned evcode;
	244
	245	/* EVDEV_ABS_<EV_ABS code>=<min>:<max>:<res>:<fuzz>:<flat> */
	246	evcode = strtoul(key + 10, &endptr, 16);
	247	if (endptr[0] != '\0') {
c89280f8	248	log_warning("Unable to parse EV_ABS code from \"%s\"", key);
51c0c286 PH	249	continue;
	250	}
	251
	252	if (fd == -1) {
	253	fd = open_device(node);
	254	if (fd < 0)
	255	return EXIT_FAILURE;
	256	}
	257
	258	override_abs(fd, node, evcode, udev_list_entry_get_value(entry));
1f6b4113	259	} else if (streq(key, "POINTINGSTICK_SENSITIVITY"))
5defbb5f	260	set_trackpoint_sensitivity(dev, udev_list_entry_get_value(entry));
9d7d42bc KS	261	}
9d7d42bc KS	262
cfba2656 PH	263	/* install list of force-release codes */
	264	if (release_count > 0)
	265	install_force_release(dev, release, release_count);
	266
9d7d42bc KS	267	return EXIT_SUCCESS;
	268	}
	269
	270	const struct udev_builtin udev_builtin_keyboard = {
	271	.name = "keyboard",
	272	.cmd = builtin_keyboard,
5ac0162c	273	.help = "Keyboard scan code to key mapping",
9d7d42bc	274	};