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/*
* Copyright (C) 2013 Red Hat, Inc.
* Copyright (C) 2014 Canonical Limited
*
* 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 3 of the licence, 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
*
* Authors: Ondrej Holy <oholy@redhat.com>
* Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include "wtmp-helper.h"
#include "user.h"
#ifdef HAVE_UTMPX_H
#include <utmpx.h>
typedef struct {
guint64 frequency;
gint64 time;
GList *previous_logins;
} UserAccounting;
typedef struct {
gchar *id;
gint64 login_time;
gint64 logout_time;
} UserPreviousLogin;
static void
user_previous_login_free (UserPreviousLogin *previous_login)
{
g_free (previous_login->id);
g_free (previous_login);
}
static gboolean
wtmp_helper_start (void)
{
#if defined(HAVE_SETUTXDB)
if (setutxdb (UTXDB_LOG, NULL) != 0) {
return FALSE;
}
#elif defined(PATH_WTMP)
if (utmpxname (PATH_WTMP) != 0) {
return FALSE;
}
setutxent ();
#else
#error You have utmpx.h, but no known way to use it for wtmp entries
#endif
return TRUE;
}
void
wtmp_helper_update_login_frequencies (GHashTable *users)
{
GHashTable *login_hash, *logout_hash;
struct utmpx *wtmp_entry;
GHashTableIter iter;
gpointer key, value;
User *user;
GVariantBuilder *builder, *builder2;
GList *l;
if (!wtmp_helper_start ()) {
return;
}
login_hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
logout_hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
while ((wtmp_entry = getutxent ())) {
UserAccounting *accounting;
UserPreviousLogin *previous_login;
gboolean shutdown_or_reboot = FALSE;
if (g_str_equal (wtmp_entry->ut_line, "~")) {
if (g_str_equal (wtmp_entry->ut_user, "shutdown") ||
g_str_equal (wtmp_entry->ut_user, "reboot")) {
shutdown_or_reboot = TRUE;
}
}
if (wtmp_entry->ut_type == BOOT_TIME || shutdown_or_reboot) {
/* Set shutdown, reboot, or boot time for missing logout records */
g_hash_table_iter_init (&iter, logout_hash);
while (g_hash_table_iter_next (&iter, &key, &value)) {
previous_login = (UserPreviousLogin *) value;
if (previous_login->logout_time == 0) {
previous_login->logout_time = wtmp_entry->ut_tv.tv_sec;
}
}
g_hash_table_remove_all (logout_hash);
} else if (wtmp_entry->ut_type == DEAD_PROCESS) {
/* Save corresponding logout time */
if (g_hash_table_lookup_extended (logout_hash, wtmp_entry->ut_line, &key, &value)) {
previous_login = (UserPreviousLogin *) value;
previous_login->logout_time = wtmp_entry->ut_tv.tv_sec;
g_hash_table_remove (logout_hash, previous_login->id);
}
}
if (wtmp_entry->ut_type != USER_PROCESS) {
continue;
}
if (wtmp_entry->ut_user[0] == 0) {
continue;
}
if (!g_hash_table_lookup_extended (login_hash,
wtmp_entry->ut_user,
&key, &value)) {
accounting = g_new (UserAccounting, 1);
accounting->frequency = 0;
accounting->previous_logins = NULL;
g_hash_table_insert (login_hash, g_strdup (wtmp_entry->ut_user), accounting);
} else {
accounting = value;
}
accounting->frequency++;
accounting->time = wtmp_entry->ut_tv.tv_sec;
/* Add zero logout time to change it later on logout record */
previous_login = g_new (UserPreviousLogin, 1);
previous_login->id = g_strdup (wtmp_entry->ut_line);
previous_login->login_time = wtmp_entry->ut_tv.tv_sec;
previous_login->logout_time = 0;
accounting->previous_logins = g_list_prepend (accounting->previous_logins, previous_login);
g_hash_table_insert (logout_hash, g_strdup (wtmp_entry->ut_line), previous_login);
}
/* Last iteration */
endutxent ();
g_hash_table_iter_init (&iter, login_hash);
while (g_hash_table_iter_next (&iter, &key, &value)) {
UserAccounting *accounting = (UserAccounting *) value;
UserPreviousLogin *previous_login;
gboolean changed = FALSE;
guint64 old_login_frequency;
guint64 old_login_time;
user = g_hash_table_lookup (users, key);
if (user == NULL) {
g_list_free_full (accounting->previous_logins, (GDestroyNotify) user_previous_login_free);
continue;
}
g_object_get (user,
"login-frequency", &old_login_frequency,
"login-time", &old_login_time,
NULL);
if (old_login_frequency != accounting->frequency) {
g_object_set (user, "login-frequency", accounting->frequency, NULL);
changed = TRUE;
}
if (old_login_time != accounting->time) {
g_object_set (user, "login-time", accounting->time, NULL);
changed = TRUE;
}
builder = g_variant_builder_new (G_VARIANT_TYPE ("a(xxa{sv})"));
for (l = g_list_last (accounting->previous_logins); l != NULL; l = l->prev) {
previous_login = l->data;
builder2 = g_variant_builder_new (G_VARIANT_TYPE ("a{sv}"));
g_variant_builder_add (builder2, "{sv}", "type", g_variant_new_string (previous_login->id));
g_variant_builder_add (builder, "(xxa{sv})", previous_login->login_time, previous_login->logout_time, builder2);
g_variant_builder_unref (builder2);
}
g_object_set (user, "login-history", g_variant_new ("a(xxa{sv})", builder), NULL);
g_variant_builder_unref (builder);
g_list_free_full (accounting->previous_logins, (GDestroyNotify) user_previous_login_free);
if (changed)
user_changed (user);
}
g_hash_table_unref (login_hash);
g_hash_table_unref (logout_hash);
}
const gchar *
wtmp_helper_get_path_for_monitor (void)
{
return PATH_WTMP;
}
#else /* HAVE_UTMPX_H */
const gchar *
wtmp_helper_get_path_for_monitor (void)
{
return NULL;
}
#endif /* HAVE_UTMPX_H */
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