libptytty/src/logging.C

// This file is part of libptytty. Do not make local modifications.
// http://software.schmorp.de/pkg/libptytty

/*----------------------------------------------------------------------*
 * File:        logging.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 1992      John Bovey <jdb@ukc.ac.uk>
 *                              - original version
 * Copyright (c) 1993      lipka
 * Copyright (c) 1993      Brian Stempien <stempien@cs.wmich.edu>
 * Copyright (c) 1995      Raul Garcia Garcia <rgg@tid.es>
 * Copyright (c) 1995      Piet W. Plomp <piet@idefix.icce.rug.nl>
 * Copyright (c) 1997      Raul Garcia Garcia <rgg@tid.es>
 * Copyright (c) 1998-2001 Geoff Wing <gcw@pobox.com>
 *                              - extensive modifications
 * Copyright (c) 1999      D J Hawkey Jr <hawkeyd@visi.com>
 *                              - lastlog support
 * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de>
 * Copyright (c) 2006      Emanuele Giaquinta <e.giaquinta@glauco.it>
 *
 * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------*/

#include "config.h"

#include "ptytty.h"

#if UTMP_SUPPORT

#ifdef HAVE_UTMPX_H
# include <utmpx.h>
#endif
#ifdef HAVE_UTMP_H
# include <utmp.h>
#endif
#ifdef HAVE_LASTLOG_H
# include <lastlog.h>
#endif

#include <pwd.h>

#include <cstdio>
#include <cstring>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>

/*
 * BSD style utmp entry
 *      ut_line, ut_name, ut_host, ut_time
 * SYSV style utmp (and utmpx) entry
 *      ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time
 */

/* ------------------------------------------------------------------------- */
/*
 * Write a BSD style utmp entry
 */
#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
static void
write_bsd_utmp (int utmp_pos, struct utmp *ut)
{
  int             fd;

  if (utmp_pos <= 0 || (fd = open (UTMP_FILE, O_WRONLY)) == -1)
    return;

  if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1)
    write (fd, ut, sizeof (struct utmp));
  close (fd);
}
#endif

/* ------------------------------------------------------------------------- */
/*
 * Update a BSD style wtmp entry
 */
#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) && defined(HAVE_STRUCT_UTMP)
static void
update_wtmp (const char *fname, const struct utmp *ut)
{
  int             fd, gotlock, retry;
  struct flock    lck;  /* fcntl locking scheme */
  struct stat     sbuf;

  if ((fd = open (fname, O_WRONLY | O_APPEND, 0)) < 0)
    return;

  lck.l_whence = SEEK_END;      /* start lock at current eof */
  lck.l_len = 0;                /* end at ``largest possible eof'' */
  lck.l_start = 0;
  lck.l_type = F_WRLCK; /* we want a write lock */

  /* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */
  for (retry = 10, gotlock = 0; retry--;)
    if (fcntl (fd, F_SETLK, &lck) != -1)
      {
        gotlock = 1;
        break;
      }
    else if (errno != EAGAIN && errno != EACCES)
      break;

  if (gotlock)
    {
      if (fstat (fd, &sbuf) == 0)
        if (write (fd, ut, sizeof (struct utmp)) != sizeof (struct utmp))
          ftruncate (fd, sbuf.st_size); /* remove bad writes */

      lck.l_type = F_UNLCK;     /* unlocking the file */
      fcntl (fd, F_SETLK, &lck);
    }

  close (fd);
}
#endif

/* ------------------------------------------------------------------------- */
#ifdef LASTLOG_SUPPORT
static void
update_lastlog (const char *pty, const char *host)
{
# if defined(HAVE_STRUCT_LASTLOGX) && defined(HAVE_UPDLASTLOGX)
  struct lastlogx llx;
# endif
# ifdef HAVE_STRUCT_LASTLOG
  int             fd;
  struct lastlog  ll;
  struct passwd  *pwent;
# endif

# if defined(HAVE_STRUCT_LASTLOGX) && defined(HAVE_UPDLASTLOGX)
  memset (&llx, 0, sizeof (llx));
  llx.ll_tv.tv_sec = time (NULL);
  llx.ll_tv.tv_usec = 0;
  strncpy (llx.ll_line, pty, sizeof (llx.ll_line));
  strncpy (llx.ll_host, host, sizeof (llx.ll_host));
  updlastlogx (LASTLOGX_FILE, getuid (), &llx);
# endif

# ifdef HAVE_STRUCT_LASTLOG
  pwent = getpwuid (getuid ());
  if (!pwent)
    {
      PTYTTY_WARN ("no entry in password file, not updating lastlog.\n", 0);
      return;
    }

  memset (&ll, 0, sizeof (ll));
  ll.ll_time = time (NULL);
  strncpy (ll.ll_line, pty, sizeof (ll.ll_line));
  strncpy (ll.ll_host, host, sizeof (ll.ll_host));
  if ((fd = open (LASTLOG_FILE, O_RDWR)) != -1)
    {
      if (lseek (fd, (off_t) ((long)pwent->pw_uid * sizeof (ll)),
                 SEEK_SET) != -1)
        write (fd, &ll, sizeof (ll));
      close (fd);
    }
# endif /* HAVE_STRUCT_LASTLOG */
}
#endif /* LASTLOG_SUPPORT */

#if defined(HAVE_UTMP_PID) || defined(HAVE_STRUCT_UTMPX)
static void
fill_id (char *id, const char *line, size_t id_size)
{
  size_t len = strlen (line);

  if (len > id_size)
    line += len - id_size;
  strncpy (id, line, id_size);
}
#endif

#ifdef HAVE_STRUCT_UTMP
static void
fill_utmp (struct utmp *ut, bool login, int pid, const char *line, const char *user, const char *host)
{
  memset (ut, 0, sizeof (struct utmp));

  strncpy (ut->ut_line, line, sizeof (ut->ut_line));
# ifdef HAVE_UTMP_PID
  fill_id (ut->ut_id, line, sizeof (ut->ut_id));
  ut->ut_pid = pid;
  ut->ut_type = login ? USER_PROCESS : DEAD_PROCESS;
# endif
  ut->ut_time = time (NULL);

  if (login)
    {
# ifdef HAVE_UTMP_PID
      strncpy (ut->ut_user, user, sizeof (ut->ut_user));
# else
      strncpy (ut->ut_name, user, sizeof (ut->ut_name));
# endif
# ifdef HAVE_UTMP_HOST
      strncpy (ut->ut_host, host, sizeof (ut->ut_host));
# endif
    }
}
#endif

#ifdef HAVE_STRUCT_UTMPX
static void
fill_utmpx (struct utmpx *utx, bool login, int pid, const char *line, const char *user, const char *host)
{
  memset (utx, 0, sizeof (struct utmpx));

  // posix says that ut_line is not meaningful for DEAD_PROCESS
  // records, but most implementations of last use ut_line to
  // associate records in wtmp file
  strncpy (utx->ut_line, line, sizeof (utx->ut_line));
  fill_id (utx->ut_id, line, sizeof (utx->ut_id));
  utx->ut_pid = pid;
  utx->ut_type = login ? USER_PROCESS : DEAD_PROCESS;
  utx->ut_tv.tv_sec = time (NULL);
  utx->ut_tv.tv_usec = 0;
# if HAVE_UTMPX_SESSION
  utx->ut_session = getsid (0);
# endif

  // posix says that ut_user is not meaningful for DEAD_PROCESS
  // records, but solaris utmp_update helper requires that the ut_user
  // field of a DEAD_PROCESS entry matches the one of an existing
  // USER_PROCESS entry for the same line, if any
  strncpy (utx->ut_user, user, sizeof (utx->ut_user));

  if (login)
    {
# ifdef HAVE_UTMPX_HOST
      strncpy (utx->ut_host, host, sizeof (utx->ut_host));
# endif
    }
}
#endif

/* ------------------------------------------------------------------------- */

/*
 * make and write utmp and wtmp entries
 */
void
ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
{
  if (!name || !*name)
    return;

  this->cmd_pid     = cmd_pid;
  this->login_shell = login_shell;

  log_session (true, hostname);
}

void
ptytty_unix::log_session (bool login, const char *hostname)
{
  struct passwd *pwent = getpwuid (getuid ());
  const char *user = (pwent && pwent->pw_name) ? pwent->pw_name : "?";

  const char *pty = name;

  if (!strncmp (pty, "/dev/", 5))
    pty += 5;           /* skip /dev/ prefix */

#ifdef HAVE_STRUCT_UTMP
  struct utmp *tmput;
  struct utmp ut;
  fill_utmp (&ut, login, cmd_pid, pty, user, hostname);
#endif

#ifdef HAVE_STRUCT_UTMPX
  struct utmpx *tmputx;
  struct utmpx utx;
  fill_utmpx (&utx, login, cmd_pid, pty, user, hostname);
#endif

#ifdef HAVE_STRUCT_UTMP
# ifdef HAVE_UTMP_PID
  setutent ();
  if (login || ((tmput = getutid (&ut)) && tmput->ut_pid == cmd_pid))
    pututline (&ut);
  endutent ();
# else
  int fd_stdin = dup (STDIN_FILENO);
  dup2 (tty, STDIN_FILENO);

  int utmp_pos = ttyslot ();
  write_bsd_utmp (utmp_pos, &ut);

  dup2 (fd_stdin, STDIN_FILENO);
  close (fd_stdin);
# endif
#endif

#ifdef HAVE_STRUCT_UTMPX
  setutxent ();
  if (login || ((tmputx = getutxid (&utx)) && tmputx->ut_pid == cmd_pid))
    pututxline (&utx);
  endutxent ();
#endif

#ifdef WTMP_SUPPORT
#ifdef LOG_ONLY_ON_LOGIN
  if (login_shell)
#endif
    {
# ifdef HAVE_STRUCT_UTMP
#  ifdef HAVE_UPDWTMP
      updwtmp (WTMP_FILE, &ut);
#  else
      update_wtmp (WTMP_FILE, &ut);
#  endif
# endif
# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
      updwtmpx (WTMPX_FILE, &utx);
# endif
    }
#endif

#ifdef LASTLOG_SUPPORT
#ifdef LOG_ONLY_ON_LOGIN
  if (login_shell)
#endif
    if (login)
      update_lastlog (pty, hostname);
#endif
}

/* ------------------------------------------------------------------------- */
/*
 * remove utmp and wtmp entries
 */
void
ptytty_unix::logout ()
{
  if (!cmd_pid)
    return;

  log_session (false, 0);

  cmd_pid = 0;
}

#else
void
ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
{
}
#endif

Revision:	1.57
Committed:	Fri Nov 25 16:31:38 2011 UTC (14 years, 10 months ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.56:	+8 -9 lines
Log Message:	Simplify.
#	Content
1	// This file is part of libptytty. Do not make local modifications.
2	// http://software.schmorp.de/pkg/libptytty
3
4	/----------------------------------------------------------------------
5	* File: logging.C
6	----------------------------------------------------------------------
7	*
8	* All portions of code are copyright by their respective author/s.
9	* Copyright (c) 1992 John Bovey <jdb@ukc.ac.uk>
10	* - original version
11	* Copyright (c) 1993 lipka
12	* Copyright (c) 1993 Brian Stempien <stempien@cs.wmich.edu>
13	* Copyright (c) 1995 Raul Garcia Garcia <rgg@tid.es>
14	* Copyright (c) 1995 Piet W. Plomp <piet@idefix.icce.rug.nl>
15	* Copyright (c) 1997 Raul Garcia Garcia <rgg@tid.es>
16	* Copyright (c) 1998-2001 Geoff Wing <gcw@pobox.com>
17	* - extensive modifications
18	* Copyright (c) 1999 D J Hawkey Jr <hawkeyd@visi.com>
19	* - lastlog support
20	* Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de>
21	* Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
22	*
23	* This program is free software; you can redistribute it and/or modify
24	* it under the terms of the GNU General Public License as published by
25	* the Free Software Foundation; either version 2 of the License, or
26	* (at your option) any later version.
27	*
28	* This program is distributed in the hope that it will be useful,
29	* but WITHOUT ANY WARRANTY; without even the implied warranty of
30	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
31	* GNU General Public License for more details.
32	*
33	* You should have received a copy of the GNU General Public License
34	* along with this program; if not, write to the Free Software
35	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
36	----------------------------------------------------------------------/
37
38	#include "config.h"
39
40	#include "ptytty.h"
41
42	#if UTMP_SUPPORT
43
44	#ifdef HAVE_UTMPX_H
45	# include <utmpx.h>
46	#endif
47	#ifdef HAVE_UTMP_H
48	# include <utmp.h>
49	#endif
50	#ifdef HAVE_LASTLOG_H
51	# include <lastlog.h>
52	#endif
53
54	#include <pwd.h>
55
56	#include <cstdio>
57	#include <cstring>
58
59	#include <sys/types.h>
60	#include <sys/stat.h>
61	#include <fcntl.h>
62	#include <unistd.h>
63	#include <time.h>
64	#include <errno.h>
65
66	/*
67	* BSD style utmp entry
68	* ut_line, ut_name, ut_host, ut_time
69	* SYSV style utmp (and utmpx) entry
70	* ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time
71	*/
72
73	/* ------------------------------------------------------------------------- */
74	/*
75	* Write a BSD style utmp entry
76	*/
77	#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
78	static void
79	write_bsd_utmp (int utmp_pos, struct utmp *ut)
80	{
81	int fd;
82
83	if (utmp_pos <= 0 \|\| (fd = open (UTMP_FILE, O_WRONLY)) == -1)
84	return;
85
86	if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1)
87	write (fd, ut, sizeof (struct utmp));
88	close (fd);
89	}
90	#endif
91
92	/* ------------------------------------------------------------------------- */
93	/*
94	* Update a BSD style wtmp entry
95	*/
96	#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) && defined(HAVE_STRUCT_UTMP)
97	static void
98	update_wtmp (const char fname, const struct utmp ut)
99	{
100	int fd, gotlock, retry;
101	struct flock lck; /* fcntl locking scheme */
102	struct stat sbuf;
103
104	if ((fd = open (fname, O_WRONLY \| O_APPEND, 0)) < 0)
105	return;
106
107	lck.l_whence = SEEK_END; /* start lock at current eof */
108	lck.l_len = 0; /* end at ``largest possible eof'' */
109	lck.l_start = 0;
110	lck.l_type = F_WRLCK; /* we want a write lock */
111
112	/* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */
113	for (retry = 10, gotlock = 0; retry--;)
114	if (fcntl (fd, F_SETLK, &lck) != -1)
115	{
116	gotlock = 1;
117	break;
118	}
119	else if (errno != EAGAIN && errno != EACCES)
120	break;
121
122	if (gotlock)
123	{
124	if (fstat (fd, &sbuf) == 0)
125	if (write (fd, ut, sizeof (struct utmp)) != sizeof (struct utmp))
126	ftruncate (fd, sbuf.st_size); /* remove bad writes */
127
128	lck.l_type = F_UNLCK; /* unlocking the file */
129	fcntl (fd, F_SETLK, &lck);
130	}
131
132	close (fd);
133	}
134	#endif
135
136	/* ------------------------------------------------------------------------- */
137	#ifdef LASTLOG_SUPPORT
138	static void
139	update_lastlog (const char pty, const char host)
140	{
141	# if defined(HAVE_STRUCT_LASTLOGX) && defined(HAVE_UPDLASTLOGX)
142	struct lastlogx llx;
143	# endif
144	# ifdef HAVE_STRUCT_LASTLOG
145	int fd;
146	struct lastlog ll;
147	struct passwd *pwent;
148	# endif
149
150	# if defined(HAVE_STRUCT_LASTLOGX) && defined(HAVE_UPDLASTLOGX)
151	memset (&llx, 0, sizeof (llx));
152	llx.ll_tv.tv_sec = time (NULL);
153	llx.ll_tv.tv_usec = 0;
154	strncpy (llx.ll_line, pty, sizeof (llx.ll_line));
155	strncpy (llx.ll_host, host, sizeof (llx.ll_host));
156	updlastlogx (LASTLOGX_FILE, getuid (), &llx);
157	# endif
158
159	# ifdef HAVE_STRUCT_LASTLOG
160	pwent = getpwuid (getuid ());
161	if (!pwent)
162	{
163	PTYTTY_WARN ("no entry in password file, not updating lastlog.\n", 0);
164	return;
165	}
166
167	memset (&ll, 0, sizeof (ll));
168	ll.ll_time = time (NULL);
169	strncpy (ll.ll_line, pty, sizeof (ll.ll_line));
170	strncpy (ll.ll_host, host, sizeof (ll.ll_host));
171	if ((fd = open (LASTLOG_FILE, O_RDWR)) != -1)
172	{
173	if (lseek (fd, (off_t) ((long)pwent->pw_uid * sizeof (ll)),
174	SEEK_SET) != -1)
175	write (fd, &ll, sizeof (ll));
176	close (fd);
177	}
178	# endif /* HAVE_STRUCT_LASTLOG */
179	}
180	#endif /* LASTLOG_SUPPORT */
181
182	#if defined(HAVE_UTMP_PID) \|\| defined(HAVE_STRUCT_UTMPX)
183	static void
184	fill_id (char id, const char line, size_t id_size)
185	{
186	size_t len = strlen (line);
187
188	if (len > id_size)
189	line += len - id_size;
190	strncpy (id, line, id_size);
191	}
192	#endif
193
194	#ifdef HAVE_STRUCT_UTMP
195	static void
196	fill_utmp (struct utmp ut, bool login, int pid, const char line, const char user, const char host)
197	{
198	memset (ut, 0, sizeof (struct utmp));
199
200	strncpy (ut->ut_line, line, sizeof (ut->ut_line));
201	# ifdef HAVE_UTMP_PID
202	fill_id (ut->ut_id, line, sizeof (ut->ut_id));
203	ut->ut_pid = pid;
204	ut->ut_type = login ? USER_PROCESS : DEAD_PROCESS;
205	# endif
206	ut->ut_time = time (NULL);
207
208	if (login)
209	{
210	# ifdef HAVE_UTMP_PID
211	strncpy (ut->ut_user, user, sizeof (ut->ut_user));
212	# else
213	strncpy (ut->ut_name, user, sizeof (ut->ut_name));
214	# endif
215	# ifdef HAVE_UTMP_HOST
216	strncpy (ut->ut_host, host, sizeof (ut->ut_host));
217	# endif
218	}
219	}
220	#endif
221
222	#ifdef HAVE_STRUCT_UTMPX
223	static void
224	fill_utmpx (struct utmpx utx, bool login, int pid, const char line, const char user, const char host)
225	{
226	memset (utx, 0, sizeof (struct utmpx));
227
228	// posix says that ut_line is not meaningful for DEAD_PROCESS
229	// records, but most implementations of last use ut_line to
230	// associate records in wtmp file
231	strncpy (utx->ut_line, line, sizeof (utx->ut_line));
232	fill_id (utx->ut_id, line, sizeof (utx->ut_id));
233	utx->ut_pid = pid;
234	utx->ut_type = login ? USER_PROCESS : DEAD_PROCESS;
235	utx->ut_tv.tv_sec = time (NULL);
236	utx->ut_tv.tv_usec = 0;
237	# if HAVE_UTMPX_SESSION
238	utx->ut_session = getsid (0);
239	# endif
240
241	// posix says that ut_user is not meaningful for DEAD_PROCESS
242	// records, but solaris utmp_update helper requires that the ut_user
243	// field of a DEAD_PROCESS entry matches the one of an existing
244	// USER_PROCESS entry for the same line, if any
245	strncpy (utx->ut_user, user, sizeof (utx->ut_user));
246
247	if (login)
248	{
249	# ifdef HAVE_UTMPX_HOST
250	strncpy (utx->ut_host, host, sizeof (utx->ut_host));
251	# endif
252	}
253	}
254	#endif
255
256	/* ------------------------------------------------------------------------- */
257
258	/*
259	* make and write utmp and wtmp entries
260	*/
261	void
262	ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
263	{
264	if (!name \|\| !*name)
265	return;
266
267	this->cmd_pid = cmd_pid;
268	this->login_shell = login_shell;
269
270	log_session (true, hostname);
271	}
272
273	void
274	ptytty_unix::log_session (bool login, const char *hostname)
275	{
276	struct passwd *pwent = getpwuid (getuid ());
277	const char *user = (pwent && pwent->pw_name) ? pwent->pw_name : "?";
278
279	const char *pty = name;
280
281	if (!strncmp (pty, "/dev/", 5))
282	pty += 5; /* skip /dev/ prefix */
283
284	#ifdef HAVE_STRUCT_UTMP
285	struct utmp *tmput;
286	struct utmp ut;
287	fill_utmp (&ut, login, cmd_pid, pty, user, hostname);
288	#endif
289
290	#ifdef HAVE_STRUCT_UTMPX
291	struct utmpx *tmputx;
292	struct utmpx utx;
293	fill_utmpx (&utx, login, cmd_pid, pty, user, hostname);
294	#endif
295
296	#ifdef HAVE_STRUCT_UTMP
297	# ifdef HAVE_UTMP_PID
298	setutent ();
299	if (login \|\| ((tmput = getutid (&ut)) && tmput->ut_pid == cmd_pid))
300	pututline (&ut);
301	endutent ();
302	# else
303	int fd_stdin = dup (STDIN_FILENO);
304	dup2 (tty, STDIN_FILENO);
305
306	int utmp_pos = ttyslot ();
307	write_bsd_utmp (utmp_pos, &ut);
308
309	dup2 (fd_stdin, STDIN_FILENO);
310	close (fd_stdin);
311	# endif
312	#endif
313
314	#ifdef HAVE_STRUCT_UTMPX
315	setutxent ();
316	if (login \|\| ((tmputx = getutxid (&utx)) && tmputx->ut_pid == cmd_pid))
317	pututxline (&utx);
318	endutxent ();
319	#endif
320
321	#ifdef WTMP_SUPPORT
322	#ifdef LOG_ONLY_ON_LOGIN
323	if (login_shell)
324	#endif
325	{
326	# ifdef HAVE_STRUCT_UTMP
327	# ifdef HAVE_UPDWTMP
328	updwtmp (WTMP_FILE, &ut);
329	# else
330	update_wtmp (WTMP_FILE, &ut);
331	# endif
332	# endif
333	# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
334	updwtmpx (WTMPX_FILE, &utx);
335	# endif
336	}
337	#endif
338
339	#ifdef LASTLOG_SUPPORT
340	#ifdef LOG_ONLY_ON_LOGIN
341	if (login_shell)
342	#endif
343	if (login)
344	update_lastlog (pty, hostname);
345	#endif
346	}
347
348	/* ------------------------------------------------------------------------- */
349	/*
350	* remove utmp and wtmp entries
351	*/
352	void
353	ptytty_unix::logout ()
354	{
355	if (!cmd_pid)
356	return;
357
358	log_session (false, 0);
359
360	cmd_pid = 0;
361	}
362
363	#else
364	void
365	ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
366	{
367	}
368	#endif
369