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-rw-r--r--daemon/gdm-session-record.c305
1 files changed, 305 insertions, 0 deletions
diff --git a/daemon/gdm-session-record.c b/daemon/gdm-session-record.c
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+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2006 Ray Strode <rstrode@redhat.com>
+ * Copyright (C) 2007 William Jon McCann <mccann@jhu.edu>
+ *
+ * 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, 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 Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#if defined(HAVE_UTMPX_H)
+#include <utmpx.h>
+#endif
+
+#if defined(HAVE_UTMP_H)
+#include <utmp.h>
+#endif
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+
+#include "gdm-session-record.h"
+
+#ifndef GDM_BAD_SESSION_RECORDS_FILE
+#define GDM_BAD_SESSION_RECORDS_FILE "/var/log/btmp"
+#endif
+
+#if !defined(GDM_NEW_SESSION_RECORDS_FILE)
+# if defined(WTMPX_FILE)
+# define GDM_NEW_SESSION_RECORDS_FILE WTMPX_FILE
+# elif defined(_PATH_WTMPX)
+# define GDM_NEW_SESSION_RECORDS_FILE _PATH_WTMPX
+# elif defined(WTMPX_FILENAME)
+# define GDM_NEW_SESSION_RECORDS_FILE WTMPX_FILENAME
+# elif defined(WTMP_FILE)
+# define GDM_NEW_SESSION_RECORDS_FILE WTMP_FILE
+# elif defined(_PATH_WTMP) /* BSD systems */
+# define GDM_NEW_SESSION_RECORDS_FILE _PATH_WTMP
+# else
+# define GDM_NEW_SESSION_RECORDS_FILE "/var/log/wtmp"
+# endif
+#endif
+
+static void
+record_set_username (UTMP *u,
+ const char *username)
+{
+#if defined(HAVE_UT_UT_USER)
+ memccpy (u->ut_user, username, '\0', sizeof (u->ut_user));
+ g_debug ("using ut_user %.*s",
+ (int) sizeof (u->ut_user),
+ u->ut_user);
+#elif defined(HAVE_UT_UT_NAME)
+ memccpy (u->ut_name, username, '\0', sizeof (u->ut_name));
+ g_debug ("using ut_name %.*s",
+ (int) sizeof (u->ut_name),
+ u->ut_name);
+#endif
+}
+
+static void
+record_set_timestamp (UTMP *u)
+{
+#if defined(HAVE_UT_UT_TV)
+ GTimeVal now = { 0 };
+
+ /* Set time in TV format */
+ g_get_current_time (&now);
+ u->ut_tv.tv_sec = now.tv_sec;
+ u->ut_tv.tv_usec = now.tv_usec;
+ g_debug ("using ut_tv time %ld",
+ (glong) u->ut_tv.tv_sec);
+#elif defined(HAVE_UT_UT_TIME)
+ /* Set time in time format */
+ time (&u->ut_time);
+ g_debug ("using ut_time %ld",
+ (glong) u->ut_time);
+#endif
+}
+
+static void
+record_set_pid (UTMP *u,
+ GPid pid)
+{
+#if defined(HAVE_UT_UT_PID)
+ /* Set pid */
+ if (pid != 0) {
+ u->ut_pid = pid;
+ }
+ g_debug ("using ut_pid %d", (int) u->ut_pid);
+#endif
+}
+
+static void
+record_set_host (UTMP *u,
+ const char *x11_display_name,
+ const char *host_name)
+{
+ char *hostname;
+
+#if defined(HAVE_UT_UT_HOST)
+ hostname = NULL;
+
+ /*
+ * Set ut_host to hostname:$DISPLAY if remote, otherwise set
+ * to $DISPLAY
+ */
+ if (host_name != NULL
+ && x11_display_name != NULL
+ && g_str_has_prefix (x11_display_name, ":")) {
+ hostname = g_strdup_printf ("%s%s", host_name, x11_display_name);
+ } else {
+ hostname = g_strdup (x11_display_name);
+ }
+
+ if (hostname != NULL) {
+ memccpy (u->ut_host, hostname, '\0', sizeof (u->ut_host));
+ g_debug ("using ut_host %.*s", (int) sizeof (u->ut_host), u->ut_host);
+#ifdef HAVE_UT_UT_SYSLEN
+ u->ut_syslen = MIN (strlen (hostname), sizeof (u->ut_host));
+#endif
+ g_free (hostname);
+ }
+#endif
+}
+
+static void
+record_set_line (UTMP *u,
+ const char *display_device,
+ const char *x11_display_name)
+{
+ /*
+ * Set ut_line to the device name associated with this display
+ * but remove the "/dev/" prefix. If no device, then use the
+ * $DISPLAY value.
+ */
+ if (display_device != NULL
+ && g_str_has_prefix (display_device, "/dev/")) {
+ memccpy (u->ut_line,
+ display_device + strlen ("/dev/"),
+ '\0',
+ sizeof (u->ut_line));
+ } else if (x11_display_name != NULL) {
+ memccpy (u->ut_line,
+ x11_display_name,
+ '\0',
+ sizeof (u->ut_line));
+ }
+
+ g_debug ("using ut_line %.*s", (int) sizeof (u->ut_line), u->ut_line);
+}
+
+void
+gdm_session_record_login (GPid session_pid,
+ const char *user_name,
+ const char *host_name,
+ const char *x11_display_name,
+ const char *display_device)
+{
+ UTMP session_record = { 0 };
+
+ if (x11_display_name == NULL)
+ x11_display_name = display_device;
+
+ record_set_username (&session_record, user_name);
+
+ g_debug ("Writing login record");
+
+#if defined(HAVE_UT_UT_TYPE)
+ session_record.ut_type = USER_PROCESS;
+ g_debug ("using ut_type USER_PROCESS");
+#endif
+
+ record_set_timestamp (&session_record);
+ record_set_pid (&session_record, session_pid);
+ record_set_host (&session_record, x11_display_name, host_name);
+ record_set_line (&session_record, display_device, x11_display_name);
+
+ /* Handle wtmp */
+ g_debug ("Writing wtmp session record to " GDM_NEW_SESSION_RECORDS_FILE);
+#if defined(HAVE_UPDWTMPX)
+ updwtmpx (GDM_NEW_SESSION_RECORDS_FILE, &session_record);
+#elif defined(HAVE_UPDWTMP)
+ updwtmp (GDM_NEW_SESSION_RECORDS_FILE, &session_record);
+#elif defined(HAVE_LOGWTMP) && defined(HAVE_UT_UT_HOST)
+#if defined(HAVE_UT_UT_USER)
+ logwtmp (session_record.ut_line, session_record.ut_user, session_record.ut_host);
+#elif defined(HAVE_UT_UT_NAME)
+ logwtmp (session_record.ut_line, session_record.ut_name, session_record.ut_host);
+#endif
+#endif
+
+ /* Handle utmp */
+#if defined(HAVE_GETUTXENT)
+ g_debug ("Adding or updating utmp record for login");
+ setutxent();
+ pututxline (&session_record);
+ endutxent();
+#elif defined(HAVE_LOGIN)
+ login (&session_record);
+#endif
+}
+
+void
+gdm_session_record_logout (GPid session_pid,
+ const char *user_name,
+ const char *host_name,
+ const char *x11_display_name,
+ const char *display_device)
+{
+ UTMP session_record = { 0 };
+
+ if (x11_display_name == NULL)
+ x11_display_name = display_device;
+
+ g_debug ("Writing logout record");
+
+#if defined(HAVE_UT_UT_TYPE)
+ session_record.ut_type = DEAD_PROCESS;
+ g_debug ("using ut_type DEAD_PROCESS");
+#endif
+
+ record_set_timestamp (&session_record);
+ record_set_pid (&session_record, session_pid);
+ record_set_host (&session_record, x11_display_name, host_name);
+ record_set_line (&session_record, display_device, x11_display_name);
+
+ /* Handle wtmp */
+ g_debug ("Writing wtmp logout record to " GDM_NEW_SESSION_RECORDS_FILE);
+#if defined(HAVE_UPDWTMPX)
+ updwtmpx (GDM_NEW_SESSION_RECORDS_FILE, &session_record);
+#elif defined (HAVE_UPDWTMP)
+ updwtmp (GDM_NEW_SESSION_RECORDS_FILE, &session_record);
+#elif defined(HAVE_LOGWTMP)
+ logwtmp (session_record.ut_line, "", "");
+#endif
+
+ /* Handle utmp */
+#if defined(HAVE_GETUTXENT)
+ g_debug ("Adding or updating utmp record for logout");
+ setutxent();
+ pututxline (&session_record);
+ endutxent();
+#elif defined(HAVE_LOGOUT)
+ logout (session_record.ut_line);
+#endif
+}
+
+void
+gdm_session_record_failed (GPid session_pid,
+ const char *user_name,
+ const char *host_name,
+ const char *x11_display_name,
+ const char *display_device)
+{
+ UTMP session_record = { 0 };
+
+ if (x11_display_name == NULL)
+ x11_display_name = display_device;
+
+ record_set_username (&session_record, user_name);
+
+ g_debug ("Writing failed session attempt record");
+
+#if defined(HAVE_UT_UT_TYPE)
+ session_record.ut_type = USER_PROCESS;
+ g_debug ("using ut_type USER_PROCESS");
+#endif
+
+ record_set_timestamp (&session_record);
+ record_set_pid (&session_record, session_pid);
+ record_set_host (&session_record, x11_display_name, host_name);
+ record_set_line (&session_record, display_device, x11_display_name);
+
+#if defined(HAVE_UPDWTMPX) || defined(HAVE_UPDWTMP)
+ /* Handle btmp */
+ g_debug ("Writing btmp failed session attempt record to "
+ GDM_BAD_SESSION_RECORDS_FILE);
+#endif
+
+#if defined(HAVE_UPDWTMPX)
+ updwtmpx (GDM_BAD_SESSION_RECORDS_FILE, &session_record);
+#elif defined(HAVE_UPDWTMP)
+ updwtmp(GDM_BAD_SESSION_RECORDS_FILE, &session_record);
+#endif
+
+}
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