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usb_moded-appsync.c
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usb_moded-appsync.c
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/**
@file usb_moded-appsync.c
Copyright (C) 2010 Nokia Corporation. All rights reserved.
@author: Philippe De Swert <philippe.de-swert@nokia.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the Lesser GNU General Public License
version 2 as published by the Free Software Foundation.
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 Lesser 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
*/
#define _GNU_SOURCE
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/time.h>
#include <glib.h>
#include <glib/gstdio.h>
#include "usb_moded-appsync.h"
#include "usb_moded-appsync-dbus.h"
#include "usb_moded-appsync-dbus-private.h"
#include "usb_moded-modesetting.h"
#include "usb_moded-log.h"
#include "usb_moded-systemd.h"
static struct list_elem *read_file(const gchar *filename, int diag);
static void enumerate_usb(void);
static gboolean enumerate_usb_cb(gpointer data);
static void start_enumerate_usb_timer(void);
static void cancel_enumerate_usb_timer(void);
static GList *sync_list = NULL;
static guint enumerate_usb_id = 0;
static struct timeval sync_tv;
#ifdef APP_SYNC_DBUS
static int no_dbus = 0;
#else
static int no_dbus = 0;
#endif /* APP_SYNC_DBUS */
static void free_elem(struct list_elem *elem)
{
g_free(elem->name);
g_free(elem->launch);
g_free(elem->mode);
free(elem);
}
static void free_elem_cb(gpointer elem, gpointer user_data)
{
(void)user_data;
free_elem(elem);
}
void free_appsync_list(void)
{
if( sync_list != 0 )
{
/*g_list_free_full(sync_list, free_elem); */
g_list_foreach (sync_list, free_elem_cb, NULL);
g_list_free (sync_list);
sync_list = 0;
log_debug("Appsync list freed\n");
}
}
static gint list_sort_func(gconstpointer a, gconstpointer b)
{
return strcasecmp( (char*)a, (char*)b );
}
void readlist(int diag)
{
GDir *confdir = 0;
const gchar *dirname;
struct list_elem *list_item;
free_appsync_list();
if(diag)
{
if( !(confdir = g_dir_open(CONF_DIR_DIAG_PATH, 0, NULL)) )
goto cleanup;
}
else
{
if( !(confdir = g_dir_open(CONF_DIR_PATH, 0, NULL)) )
goto cleanup;
}
while( (dirname = g_dir_read_name(confdir)) )
{
log_debug("Read file %s\n", dirname);
if( (list_item = read_file(dirname, diag)) )
sync_list = g_list_append(sync_list, list_item);
}
cleanup:
if( confdir ) g_dir_close(confdir);
/* sort list alphabetically so services for a mode
can be run in a certain order */
sync_list=g_list_sort(sync_list, list_sort_func);
/* set up session bus connection if app sync in use
* so we do not need to make the time consuming connect
* operation at enumeration time ... */
if( sync_list )
{
log_debug("Sync list valid\n");
#ifdef APP_SYN_DBUS
usb_moded_app_sync_init_connection();
#endif
}
}
static struct list_elem *read_file(const gchar *filename, int diag)
{
gchar *full_filename = NULL;
GKeyFile *settingsfile = NULL;
struct list_elem *list_item = NULL;
if(diag)
{
if( !(full_filename = g_strconcat(CONF_DIR_DIAG_PATH, "/", filename, NULL)) )
goto cleanup;
}
else
{
if( !(full_filename = g_strconcat(CONF_DIR_PATH, "/", filename, NULL)) )
goto cleanup;
}
if( !(settingsfile = g_key_file_new()) )
goto cleanup;
if( !g_key_file_load_from_file(settingsfile, full_filename, G_KEY_FILE_NONE, NULL) )
goto cleanup;
if( !(list_item = calloc(1, sizeof *list_item)) )
goto cleanup;
list_item->name = g_key_file_get_string(settingsfile, APP_INFO_ENTRY, APP_INFO_NAME_KEY, NULL);
log_debug("Appname = %s\n", list_item->name);
list_item->launch = g_key_file_get_string(settingsfile, APP_INFO_ENTRY, APP_INFO_LAUNCH_KEY, NULL);
log_debug("Launch = %s\n", list_item->launch);
list_item->mode = g_key_file_get_string(settingsfile, APP_INFO_ENTRY, APP_INFO_MODE_KEY, NULL);
log_debug("Launch mode = %s\n", list_item->mode);
list_item->systemd = g_key_file_get_integer(settingsfile, APP_INFO_ENTRY, APP_INFO_SYSTEMD_KEY, NULL);
log_debug("Systemd control = %d\n", list_item->systemd);
list_item->post = g_key_file_get_integer(settingsfile, APP_INFO_ENTRY, APP_INFO_POST, NULL);
list_item->state = APP_STATE_DONTCARE;
cleanup:
if(settingsfile)
g_key_file_free(settingsfile);
g_free(full_filename);
/* if a minimum set of required elements is not filled in we discard the list_item */
if( list_item && !(list_item->name && list_item->mode) )
{
log_debug("Element invalid, discarding\n");
free_elem(list_item);
list_item = 0;
}
return list_item;
}
/* @return 0 on succes, 1 if there is a failure */
int activate_sync(const char *mode)
{
GList *iter;
int count = 0;
log_debug("activate sync");
/* Get start of activation timestamp */
gettimeofday(&sync_tv, 0);
if( sync_list == 0 )
{
log_debug("No sync list! Enumerating\n");
enumerate_usb();
return 0;
}
/* Count apps that need to be activated for this mode and
* mark them as currently inactive */
for( iter = sync_list; iter; iter = g_list_next(iter) )
{
struct list_elem *data = iter->data;
if(!strcmp(data->mode, mode))
{
++count;
data->state = APP_STATE_INACTIVE;
}
else
{
data->state = APP_STATE_DONTCARE;
}
}
/* If there is nothing to activate, enumerate immediately */
if(count <= 0)
{
log_debug("Nothing to launch.\n");
enumerate_usb();
return(0);
}
#ifdef APP_SYNC_DBUS
/* check dbus initialisation, skip dbus activated services if this fails */
if(!usb_moded_app_sync_init())
{
log_debug("dbus setup failed => skipping dbus launched apps \n");
no_dbus = 1;
}
#endif /* APP_SYNC_DBUS */
/* start timer */
start_enumerate_usb_timer();
/* go through list and launch apps */
for( iter = sync_list; iter; iter = g_list_next(iter) )
{
struct list_elem *data = iter->data;
if(!strcmp(mode, data->mode))
{
/* do not launch items marked as post, will be launched after usb is up */
if(data->post)
{
continue;
}
log_debug("launching pre-enum-app %s\n", data->name);
if(data->systemd)
{
if(!systemd_control_service(data->name, SYSTEMD_START))
mark_active(data->name, 0);
else
goto error;
}
else if(data->launch)
{
/* skipping if dbus session bus is not available,
or not compiled in */
if(no_dbus)
mark_active(data->name, 0);
#ifdef APP_SYNC_DBUS
else
if(!usb_moded_dbus_app_launch(data->launch))
mark_active(data->name, 0);
else
goto error;
#endif /* APP_SYNC_DBUS */
}
}
}
return(0);
error:
log_warning("Error launching a service!\n");
return(1);
}
int activate_sync_post(const char *mode)
{
GList *iter;
log_debug("activate post sync");
if( sync_list == 0 )
{
log_debug("No sync list! skipping post sync\n");
return 0;
}
#ifdef APP_SYNC_DBUS
/* check dbus initialisation, skip dbus activated services if this fails */
if(!usb_moded_app_sync_init())
{
log_debug("dbus setup failed => skipping dbus launched apps \n");
no_dbus = 1;
}
#endif /* APP_SYNC_DBUS */
/* go through list and launch apps */
for( iter = sync_list; iter; iter = g_list_next(iter) )
{
struct list_elem *data = iter->data;
if(!strcmp(mode, data->mode))
{
/* launch only items marked as post, others are already running */
if(!data->post)
continue;
log_debug("launching post-enum-app %s\n", data->name);
if(data->systemd)
{
if(systemd_control_service(data->name, SYSTEMD_START))
goto error;
mark_active(data->name, 1);
}
else if(data->launch)
{
/* skipping if dbus session bus is not available,
or not compiled in */
if(no_dbus)
continue;
#ifdef APP_SYNC_DBUS
else
if(usb_moded_dbus_app_launch(data->launch) != 0)
goto error;
#endif /* APP_SYNC_DBUS */
}
}
}
return(0);
error:
log_warning("Error launching a service!\n");
return(1);
}
int mark_active(const gchar *name, int post)
{
int ret = -1; // assume name not found
int missing = 0;
GList *iter;
log_debug("%s-enum-app %s is started\n", post ? "post" : "pre", name);
for( iter = sync_list; iter; iter = g_list_next(iter) )
{
struct list_elem *data = iter->data;
if(!strcmp(data->name, name))
{
/* TODO: do we need to worry about duplicate names in the list? */
ret = (data->state != APP_STATE_ACTIVE);
data->state = APP_STATE_ACTIVE;
/* updated + missing -> not going to enumerate */
if( missing ) break;
}
else if( data->state == APP_STATE_INACTIVE && data->post == post )
{
missing = 1;
/* updated + missing -> not going to enumerate */
if( ret != -1 ) break;
}
}
if( !post && !missing )
{
log_debug("All pre-enum-apps active. Let's enumerate\n");
enumerate_usb();
}
/* -1=not found, 0=already active, 1=activated now */
return ret;
}
static gboolean enumerate_usb_cb(gpointer data)
{
(void)data;
enumerate_usb_id = 0;
log_debug("handling enumeration timeout");
enumerate_usb();
/* return false to stop the timer from repeating */
return FALSE;
}
static void start_enumerate_usb_timer(void)
{
log_debug("scheduling enumeration timeout");
if( enumerate_usb_id )
g_source_remove(enumerate_usb_id), enumerate_usb_id = 0;
enumerate_usb_id = g_timeout_add_seconds(2, enumerate_usb_cb, NULL);
}
static void cancel_enumerate_usb_timer(void)
{
if( enumerate_usb_id )
{
log_debug("canceling enumeration timeout");
g_source_remove(enumerate_usb_id), enumerate_usb_id = 0;
}
}
static void enumerate_usb(void)
{
struct timeval tv;
/* Stop the timer in case of explicit enumeration call */
cancel_enumerate_usb_timer();
/* Debug: how long it took from sync start to get here */
gettimeofday(&tv, 0);
timersub(&tv, &sync_tv, &tv);
log_debug("sync to enum: %.3f seconds", tv.tv_sec + tv.tv_usec * 1e-6);
#ifdef APP_SYNC_DBUS
/* remove dbus service */
usb_moded_appsync_cleanup();
#endif /* APP_SYNC_DBUS */
}
static void appsync_stop_apps(int post)
{
GList *iter = 0;
for( iter = sync_list; iter; iter = g_list_next(iter) )
{
struct list_elem *data = iter->data;
if(data->systemd && data->state == APP_STATE_ACTIVE && data->post == post)
{
log_debug("stopping %s-enum-app %s", post ? "post" : "pre", data->name);
if(systemd_control_service(data->name, SYSTEMD_STOP))
log_debug("Failed to stop %s\n", data->name);
data->state = APP_STATE_DONTCARE;
}
}
}
int appsync_stop(int force)
{
/* If force arg is used, stop all applications that
* could have been started by usb-moded */
if(force)
{
GList *iter;
log_debug("assuming all applications are active");
for( iter = sync_list; iter; iter = g_list_next(iter) )
{
struct list_elem *data = iter->data;
data->state = APP_STATE_ACTIVE;
}
}
/* Stop post-apps 1st */
appsync_stop_apps(1);
/* Then pre-apps */
appsync_stop_apps(0);
/* Do not leave active timers behind */
cancel_enumerate_usb_timer();
return(0);
}