159b03e137
Add support for multi-seat-aware input device hotplugging. This implements the multi-seat scheme explained here: http://www.freedesktop.org/wiki/Software/systemd/multiseat This introduces a new X server switch "-seat" which allows configuration of the seat to enumerate hotplugging devices on. If specified the value of this parameter will also be exported as root window property Xorg_Seat. To properly support input hotplugging devices need to be tagged in udev according to the seat they are on. Untagged devices are assumed to be on the default seat "seat0". If no "-seat" parameter is passed only devices on "seat0" are used. This means that the new scheme is perfectly compatible with existing setups which have no tagged input devices. Note that the -seat switch takes a completely generic identifier, and that it has no effect on non-Linux systems. In fact, on other OSes a completely different identifier scheme for seats could be used but still be exposed with the Xorg_Seat and -seat. I tried to follow the coding style of the surrounding code blocks if there was any one could follow. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
354 lines
11 KiB
C
354 lines
11 KiB
C
/*
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* Copyright © 2009 Julien Cristau
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Author: Julien Cristau <jcristau@debian.org>
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <libudev.h>
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#include <ctype.h>
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#include "input.h"
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#include "inputstr.h"
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#include "hotplug.h"
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#include "config-backends.h"
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#include "os.h"
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#include "globals.h"
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#define UDEV_XKB_PROP_KEY "xkb"
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#define LOG_PROPERTY(path, prop, val) \
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LogMessageVerb(X_INFO, 10, \
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"config/udev: getting property %s on %s " \
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"returned \"%s\"\n", \
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(prop), (path), (val) ? (val) : "(null)")
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#define LOG_SYSATTR(path, attr, val) \
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LogMessageVerb(X_INFO, 10, \
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"config/udev: getting attribute %s on %s " \
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"returned \"%s\"\n", \
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(attr), (path), (val) ? (val) : "(null)")
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static struct udev_monitor *udev_monitor;
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static void
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device_added(struct udev_device *udev_device)
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{
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const char *path, *name = NULL;
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char *config_info = NULL;
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const char *syspath;
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const char *tags_prop;
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const char *key, *value, *tmp;
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InputOption *options = NULL, *tmpo;
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InputAttributes attrs = {};
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DeviceIntPtr dev = NULL;
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struct udev_list_entry *set, *entry;
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struct udev_device *parent;
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int rc;
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const char *dev_seat;
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path = udev_device_get_devnode(udev_device);
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syspath = udev_device_get_syspath(udev_device);
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if (!path || !syspath)
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return;
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dev_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
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if (!dev_seat)
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dev_seat = "seat0";
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if (SeatId && strcmp(dev_seat, SeatId))
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return;
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if (!SeatId && strcmp(dev_seat, "seat0"))
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return;
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if (!udev_device_get_property_value(udev_device, "ID_INPUT")) {
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LogMessageVerb(X_INFO, 10,
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"config/udev: ignoring device %s without "
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"property ID_INPUT set\n",
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path);
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return;
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}
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options = calloc(sizeof(*options), 1);
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if (!options)
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return;
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options->key = strdup("_source");
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options->value = strdup("server/udev");
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if (!options->key || !options->value)
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goto unwind;
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parent = udev_device_get_parent(udev_device);
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if (parent) {
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const char *ppath = udev_device_get_devnode(parent);
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const char *product = udev_device_get_property_value(parent, "PRODUCT");
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const char *pnp_id = udev_device_get_sysattr_value(parent, "id");
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unsigned int usb_vendor, usb_model;
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name = udev_device_get_sysattr_value(parent, "name");
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LOG_SYSATTR(ppath, "name", name);
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if (!name) {
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name = udev_device_get_property_value(parent, "NAME");
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LOG_PROPERTY(ppath, "NAME", name);
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}
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if (pnp_id)
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attrs.pnp_id = strdup(pnp_id);
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LOG_SYSATTR(ppath, "id", pnp_id);
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/* construct USB ID in lowercase hex - "0000:ffff" */
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if (product && sscanf(product, "%*x/%4x/%4x/%*x", &usb_vendor, &usb_model) == 2) {
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if (asprintf(&attrs.usb_id, "%04x:%04x", usb_vendor, usb_model)
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== -1)
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attrs.usb_id = NULL;
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else
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LOG_PROPERTY(path, "PRODUCT", product);
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}
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}
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if (!name)
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name = "(unnamed)";
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else
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attrs.product = strdup(name);
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add_option(&options, "name", name);
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add_option(&options, "path", path);
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add_option(&options, "device", path);
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if (path)
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attrs.device = strdup(path);
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tags_prop = udev_device_get_property_value(udev_device, "ID_INPUT.tags");
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LOG_PROPERTY(path, "ID_INPUT.tags", tags_prop);
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attrs.tags = xstrtokenize(tags_prop, ",");
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if (asprintf(&config_info, "udev:%s", syspath) == -1) {
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config_info = NULL;
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goto unwind;
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}
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if (device_is_duplicate(config_info)) {
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LogMessage(X_WARNING, "config/udev: device %s already added. "
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"Ignoring.\n", name);
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goto unwind;
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}
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set = udev_device_get_properties_list_entry(udev_device);
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udev_list_entry_foreach(entry, set) {
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key = udev_list_entry_get_name(entry);
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if (!key)
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continue;
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value = udev_list_entry_get_value(entry);
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if (!strncasecmp(key, UDEV_XKB_PROP_KEY,
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sizeof(UDEV_XKB_PROP_KEY) - 1)) {
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LOG_PROPERTY(path, key, value);
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tmp = key + sizeof(UDEV_XKB_PROP_KEY) - 1;
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if (!strcasecmp(tmp, "rules"))
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add_option(&options, "xkb_rules", value);
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else if (!strcasecmp(tmp, "layout"))
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add_option(&options, "xkb_layout", value);
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else if (!strcasecmp(tmp, "variant"))
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add_option(&options, "xkb_variant", value);
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else if (!strcasecmp(tmp, "model"))
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add_option(&options, "xkb_model", value);
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else if (!strcasecmp(tmp, "options"))
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add_option(&options, "xkb_options", value);
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} else if (!strcmp(key, "ID_VENDOR")) {
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LOG_PROPERTY(path, key, value);
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attrs.vendor = strdup(value);
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} else if (!strcmp(key, "ID_INPUT_KEY")) {
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LOG_PROPERTY(path, key, value);
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attrs.flags |= ATTR_KEYBOARD;
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} else if (!strcmp(key, "ID_INPUT_MOUSE")) {
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LOG_PROPERTY(path, key, value);
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attrs.flags |= ATTR_POINTER;
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} else if (!strcmp(key, "ID_INPUT_JOYSTICK")) {
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LOG_PROPERTY(path, key, value);
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attrs.flags |= ATTR_JOYSTICK;
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} else if (!strcmp(key, "ID_INPUT_TABLET")) {
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LOG_PROPERTY(path, key, value);
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attrs.flags |= ATTR_TABLET;
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} else if (!strcmp(key, "ID_INPUT_TOUCHPAD")) {
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LOG_PROPERTY(path, key, value);
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attrs.flags |= ATTR_TOUCHPAD;
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} else if (!strcmp(key, "ID_INPUT_TOUCHSCREEN")) {
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LOG_PROPERTY(path, key, value);
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attrs.flags |= ATTR_TOUCHSCREEN;
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}
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}
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add_option(&options, "config_info", config_info);
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LogMessage(X_INFO, "config/udev: Adding input device %s (%s)\n",
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name, path);
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rc = NewInputDeviceRequest(options, &attrs, &dev);
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if (rc != Success)
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goto unwind;
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unwind:
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free(config_info);
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while ((tmpo = options)) {
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options = tmpo->next;
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free(tmpo->key); /* NULL if dev != NULL */
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free(tmpo->value); /* NULL if dev != NULL */
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free(tmpo);
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}
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free(attrs.usb_id);
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free(attrs.pnp_id);
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free(attrs.product);
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free(attrs.device);
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free(attrs.vendor);
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if (attrs.tags) {
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char **tag = attrs.tags;
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while (*tag) {
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free(*tag);
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tag++;
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}
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free(attrs.tags);
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}
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return;
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}
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static void
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device_removed(struct udev_device *device)
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{
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char *value;
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const char *syspath = udev_device_get_syspath(device);
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if (asprintf(&value, "udev:%s", syspath) == -1)
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return;
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remove_devices("udev", value);
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free(value);
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}
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static void
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wakeup_handler(pointer data, int err, pointer read_mask)
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{
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int udev_fd = udev_monitor_get_fd(udev_monitor);
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struct udev_device *udev_device;
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const char *action;
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if (err < 0)
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return;
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if (FD_ISSET(udev_fd, (fd_set *)read_mask)) {
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udev_device = udev_monitor_receive_device(udev_monitor);
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if (!udev_device)
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return;
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action = udev_device_get_action(udev_device);
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if (action) {
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if (!strcmp(action, "add") || !strcmp(action, "change")) {
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device_removed(udev_device);
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device_added(udev_device);
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}
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else if (!strcmp(action, "remove"))
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device_removed(udev_device);
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}
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udev_device_unref(udev_device);
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}
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}
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static void
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block_handler(pointer data, struct timeval **tv, pointer read_mask)
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{
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}
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int
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config_udev_init(void)
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{
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struct udev *udev;
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struct udev_enumerate *enumerate;
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struct udev_list_entry *devices, *device;
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udev = udev_new();
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if (!udev)
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return 0;
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udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
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if (!udev_monitor)
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return 0;
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udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "input", NULL);
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udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL); /* For Wacom serial devices */
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if (SeatId && strcmp(SeatId, "seat0"))
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udev_monitor_filter_add_match_tag(udev_monitor, SeatId);
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if (udev_monitor_enable_receiving(udev_monitor)) {
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ErrorF("config/udev: failed to bind the udev monitor\n");
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return 0;
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}
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enumerate = udev_enumerate_new(udev);
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if (!enumerate)
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return 0;
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udev_enumerate_add_match_subsystem(enumerate, "input");
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udev_enumerate_add_match_subsystem(enumerate, "tty");
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if (SeatId && strcmp(SeatId, "seat0"))
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udev_enumerate_add_match_tag(enumerate, SeatId);
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udev_enumerate_scan_devices(enumerate);
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devices = udev_enumerate_get_list_entry(enumerate);
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udev_list_entry_foreach(device, devices) {
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const char *syspath = udev_list_entry_get_name(device);
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struct udev_device *udev_device = udev_device_new_from_syspath(udev, syspath);
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/* Device might be gone by the time we try to open it */
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if (!udev_device)
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continue;
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device_added(udev_device);
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udev_device_unref(udev_device);
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}
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udev_enumerate_unref(enumerate);
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RegisterBlockAndWakeupHandlers(block_handler, wakeup_handler, NULL);
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AddGeneralSocket(udev_monitor_get_fd(udev_monitor));
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return 1;
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}
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void
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config_udev_fini(void)
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{
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struct udev *udev;
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if (!udev_monitor)
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return;
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udev = udev_monitor_get_udev(udev_monitor);
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RemoveGeneralSocket(udev_monitor_get_fd(udev_monitor));
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RemoveBlockAndWakeupHandlers(block_handler, wakeup_handler, NULL);
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udev_monitor_unref(udev_monitor);
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udev_monitor = NULL;
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udev_unref(udev);
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}
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