336 lines
11 KiB
C
336 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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#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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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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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(ppath, "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 (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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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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