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/***************************************************************************
*
* up-devd.c : process devd events
*
* Copyright (C) 2006, 2007 Joe Marcus Clarke <marcus@FreeBSD.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
**************************************************************************/
#include "config.h"
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "up-backend.h"
#include "up-backend-acpi.h"
#include "up-devd.h"
#define UP_DEVD_SOCK_PATH "/var/run/devd.pipe"
#define UP_DEVD_EVENT_NOTIFY '!'
#define UP_DEVD_EVENT_ADD '+'
#define UP_DEVD_EVENT_REMOVE '-'
#define UP_DEVD_EVENT_NOMATCH '?'
static UpDevdHandler *handlers[] = {
&up_backend_acpi_devd_handler,
};
static gboolean up_devd_inited = FALSE;
#if 0
static GHashTable *
up_devd_parse_params (const gchar *str)
{
GHashTable *params;
gchar **pairs;
gint i;
g_return_val_if_fail (str != NULL, FALSE);
params = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
pairs = g_strsplit(str, " ", 0);
for (i = 0; pairs[i]; i++) {
gchar *equal;
equal = strchr (pairs[i], '=');
g_hash_table_insert (params,
equal ? g_strndup(pairs[i], equal - pairs[i]) : g_strdup(pairs[i]),
equal ? g_strdup(equal + 1) : NULL);
}
g_strfreev (pairs);
return params;
}
#endif
static gboolean
up_devd_parse_notify (const gchar *event,
gchar **system,
gchar **subsystem,
gchar **type,
gchar **data)
{
gchar **items;
gboolean status = FALSE;
/*
!system=IFNET subsystem=bge0 type=LINK_DOWN
*/
g_return_val_if_fail(event != NULL, FALSE);
g_return_val_if_fail(system != NULL, FALSE);
g_return_val_if_fail(subsystem != NULL, FALSE);
g_return_val_if_fail(type != NULL, FALSE);
g_return_val_if_fail(data != NULL, FALSE);
items = g_strsplit(event, " ", 0);
if (g_strv_length(items) < 3)
goto end;
if (! g_str_has_prefix(items[0], "system=") ||
! g_str_has_prefix(items[1], "subsystem=") ||
! g_str_has_prefix(items[2], "type="))
goto end;
*system = g_strdup(items[0] + 7);
*subsystem = g_strdup(items[1] + 10);
*type = g_strdup(items[2] + 5);
*data = g_strdup(items[3]); /* may be NULL */
status = TRUE;
end:
g_strfreev(items);
return status;
}
static void
up_devd_process_notify_event (UpBackend *backend,
const gchar *system,
const gchar *subsystem,
const gchar *type,
const gchar *data)
{
gint i;
g_return_if_fail(backend != NULL);
g_return_if_fail(system != NULL);
g_return_if_fail(subsystem != NULL);
g_return_if_fail(type != NULL);
g_return_if_fail(data != NULL);
for (i = 0; i < (int) G_N_ELEMENTS(handlers); i++)
if (handlers[i]->notify && handlers[i]->notify (backend, system, subsystem, type, data))
return;
/* no default action */
}
static void
up_devd_process_event (const gchar *event, gpointer user_data)
{
UpBackend *backend;
g_return_if_fail(event != NULL);
backend = UP_BACKEND(user_data);
g_debug("received devd event: '%s'", event);
switch (event[0]) {
case UP_DEVD_EVENT_ADD:
case UP_DEVD_EVENT_REMOVE:
/* Do nothing as we don't currently hotplug ACPI devices. */
return;
case UP_DEVD_EVENT_NOTIFY: {
gchar *system;
gchar *subsystem;
gchar *type;
gchar *data;
if (!up_devd_parse_notify (event + 1, &system, &subsystem, &type, &data))
goto malformed;
up_devd_process_notify_event (backend, system, subsystem, type, data);
g_free (system);
g_free (subsystem);
g_free (type);
g_free (data);
}
return;
case UP_DEVD_EVENT_NOMATCH:
/* Do nothing. */
return;
}
malformed:
g_warning("malformed devd event: %s", event);
}
static gboolean
up_devd_event_cb (GIOChannel *source, GIOCondition condition,
gpointer user_data)
{
gchar *event;
gsize terminator;
GIOStatus status;
status = g_io_channel_read_line(source, &event, NULL, &terminator, NULL);
if (status == G_IO_STATUS_NORMAL) {
event[terminator] = 0;
up_devd_process_event(event, user_data);
g_free(event);
} else if (status == G_IO_STATUS_AGAIN) {
up_devd_init (UP_BACKEND(user_data));
if (up_devd_inited) {
int fd;
fd = g_io_channel_unix_get_fd (source);
g_io_channel_shutdown (source, FALSE, NULL);
close (fd);
return FALSE;
}
}
return TRUE;
}
void
up_devd_init (UpBackend *backend)
{
int event_fd;
struct sockaddr_un addr;
event_fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (event_fd < 0) {
g_warning("failed to create event socket: '%s'", g_strerror(errno));
up_devd_inited = FALSE;
return;
}
addr.sun_family = AF_UNIX;
strncpy (addr.sun_path, UP_DEVD_SOCK_PATH, sizeof(addr.sun_path));
if (connect (event_fd, (struct sockaddr *)&addr, sizeof(addr)) == 0) {
GIOChannel *channel;
channel = g_io_channel_unix_new (event_fd);
g_io_add_watch (channel, G_IO_IN, up_devd_event_cb, backend);
g_io_channel_unref (channel);
up_devd_inited = TRUE;
} else {
g_warning ("failed to connect to %s: '%s'", UP_DEVD_SOCK_PATH,
g_strerror(errno));
close (event_fd);
up_devd_inited = FALSE;
}
}
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