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 <pcg@goof.com>
 *
 * 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

#if HAVE_STRUCT_UTMP
static int              write_bsd_utmp              (int utmp_pos, struct utmp *wu);
static void             update_wtmp                 (const char *fname, const struct utmp *putmp);
#endif

static void             update_lastlog              (const char *fname, const char *pty, const char *host);

/*
 * 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
 */

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

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

  if (!pty || !*pty)
    return;

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

#ifdef HAVE_STRUCT_UTMP
  struct utmp *ut = &this->ut;
#endif
#ifdef HAVE_STRUCT_UTMPX
  struct utmpx *utx = &this->utx;
#endif
  int i;
  struct passwd *pwent = getpwuid (getuid ());

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

#if defined(HAVE_UTMP_PID) || defined(HAVE_STRUCT_UTMPX)
  if (!strncmp (pty, "pty", 3) || !strncmp (pty, "tty", 3))
    strncpy (ut_id, pty + 3, sizeof (ut_id));
  else if (sscanf (pty, "pts/%d", &i) == 1)
    sprintf (ut_id, "vt%02x", (i & 0xff));      /* sysv naming */
  else if (strncmp (pty, "pty", 3) && strncmp (pty, "tty", 3))
    {
      warn ("can't parse tty name \"%s\", not adding utmp entry.\n", pty);
      return;
    }
#endif

#ifdef HAVE_STRUCT_UTMP
  memset (ut, 0, sizeof (struct utmp));
# ifdef HAVE_UTMP_PID
  setutent ();
  strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
  ut->ut_type = DEAD_PROCESS;
  getutid (ut);         /* position to entry in utmp file */
  strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
# endif
#endif

#ifdef HAVE_STRUCT_UTMPX
  memset (utx, 0, sizeof (struct utmpx));
  setutxent ();
  strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
  utx->ut_type = DEAD_PROCESS;
  getutxid (utx);               /* position to entry in utmp file */
  strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
#endif

#ifdef HAVE_STRUCT_UTMP
  strncpy (ut->ut_line, pty, sizeof (ut->ut_line));
  ut->ut_time = time (NULL);
# ifdef HAVE_UTMP_PID
  strncpy (ut->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
          sizeof (ut->ut_user));
  strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
  ut->ut_time = time (NULL);
  ut->ut_pid = cmd_pid;
#  ifdef HAVE_UTMP_HOST
  strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
#  endif
  ut->ut_type = USER_PROCESS;
  pututline (ut);
  endutent ();                  /* close the file */
  utmp_pos = 0;
# else
  strncpy (ut->ut_name, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
          sizeof (ut->ut_name));
#  ifdef HAVE_UTMP_HOST
  strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
#  endif
# endif
#endif

#ifdef HAVE_STRUCT_UTMPX
  strncpy (utx->ut_line, pty, sizeof (utx->ut_line));
  strncpy (utx->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
          sizeof (utx->ut_user));
  strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
# if HAVE_UTMPX_SESSION
  utx->ut_session = getsid (0);
# endif
  utx->ut_tv.tv_sec = time (NULL);
  utx->ut_tv.tv_usec = 0;
  utx->ut_pid = cmd_pid;
# ifdef HAVE_UTMPX_HOST
  strncpy (utx->ut_host, hostname, sizeof (utx->ut_host));
#  if 0
  {
    char           *colon;

    if ((colon = strrchr (ut->ut_host, ':')) != NULL)
      *colon = '\0';
  }
#  endif
# endif
  utx->ut_type = USER_PROCESS;
  pututxline (utx);
  endutxent ();         /* close the file */
  utmp_pos = 0;
#endif

#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
  {
# ifdef HAVE_TTYSLOT
    int fdstdin = dup (STDIN_FILENO);
    dup2 (tty, STDIN_FILENO);

    i = ttyslot ();
    if (write_bsd_utmp (i, ut))
      utmp_pos = i;

    dup2 (fdstdin, STDIN_FILENO);
    close (fdstdin);
# else
    FILE *fd0;

    if ((fd0 = fopen (TTYTAB_FILENAME, "r")) != NULL)
      {
        char buf[256], name[256];

        buf[sizeof (buf) - 1] = '\0';
        for (i = 1; (fgets (buf, sizeof (buf) - 1, fd0) != NULL);)
          {
            if (*buf == '#' || sscanf (buf, "%s", name) != 1)
              continue;
            if (!strcmp (ut->ut_line, name))
              {
                if (!write_bsd_utmp (i, ut))
                  i = 0;
                utmp_pos = i;
                fclose (fd0);
                break;
              }
            i++;
          }
        fclose (fd0);
      }
# endif
  }
#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
#if defined(LASTLOG_SUPPORT) && defined(LASTLOG_FILE)
#ifdef LOG_ONLY_ON_LOGIN
  if (login_shell)
#endif
    update_lastlog (LASTLOG_FILE, pty, hostname);
#endif
}

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

#ifdef HAVE_STRUCT_UTMP
  struct utmp *tmput, *ut = &this->ut;
#endif
#ifdef HAVE_STRUCT_UTMPX
  struct utmpx *tmputx, *utx = &this->utx;
#endif

#ifdef HAVE_STRUCT_UTMP
# ifdef HAVE_UTMP_PID
  memset (ut, 0, sizeof (struct utmp));
  setutent ();
  strncpy (ut->ut_id, this->ut_id, sizeof (ut->ut_id));
  ut->ut_type = USER_PROCESS;
  if ((tmput = getutid (ut)))           /* position to entry in utmp file */
    ut = tmput;
  ut->ut_type = DEAD_PROCESS;
# else
  memset (ut->ut_name, 0, sizeof (ut->ut_name));
#  ifdef HAVE_UTMP_HOST
  memset (ut->ut_host, 0, sizeof (ut->ut_host));
#  endif
# endif
  ut->ut_time = time (NULL);
#endif

#ifdef HAVE_STRUCT_UTMPX
  memset (utx, 0, sizeof (struct utmpx));
  setutxent ();
  strncpy (utx->ut_id, this->ut_id, sizeof (utx->ut_id));
  utx->ut_type = USER_PROCESS;
  if ((tmputx = getutxid (utx)))        /* position to entry in utmp file */
    utx = tmputx;
  utx->ut_type = DEAD_PROCESS;
# if HAVE_UTMPX_SESSION
  utx->ut_session = getsid (0);
# endif
  utx->ut_tv.tv_sec = time (NULL);
  utx->ut_tv.tv_usec = 0;
#endif

  /*
   * Write ending wtmp entry
   */
#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

  /*
   * Write utmp entry
   */
#ifdef HAVE_STRUCT_UTMP
# ifdef HAVE_UTMP_PID
  if (ut->ut_pid == cmd_pid)
    pututline (ut);
  endutent ();
# else
  memset (ut, 0, sizeof (struct utmp));
  write_bsd_utmp (utmp_pos, ut);
# endif
#endif
#ifdef HAVE_STRUCT_UTMPX
  if (utx->ut_pid == cmd_pid)
    pututxline (utx);
  endutxent ();
#endif

  cmd_pid = 0;
}

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

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

  if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1)
    write (fd, wu, sizeof (struct utmp));
  close (fd);
  return 1;
}
#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 *putmp)
{
  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)
    {           /* give it up */
      close (fd);
      return;
    }
  if (fstat (fd, &sbuf) == 0)
    if (write (fd, putmp, 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 *fname, const char *pty, const char *host)
{
# ifdef HAVE_STRUCT_LASTLOGX
  struct lastlogx llx;
# endif
# ifdef HAVE_STRUCT_LASTLOG
  int             fd;
  struct lastlog  ll;
#  ifdef LASTLOG_IS_DIR
  char            lastlogfile[256];
#  endif
  struct passwd  *pwent;
# endif

# ifdef HAVE_STRUCT_LASTLOGX
  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)
    {
      warn ("no entry in password file, not updating lastlog.\n");
      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));
#  ifdef LASTLOG_IS_DIR
  sprintf (lastlogfile, "%.*s/%.*s",
          sizeof (lastlogfile) - sizeof (pwent->pw_name) - 2, fname,
          sizeof (pwent->pw_name),
          (!pwent->pw_name || pwent->pw_name[0] == '\0') ? "unknown"
          : pwent->pw_name);
  if ((fd = open (lastlogfile, O_WRONLY | O_CREAT, 0644)) >= 0)
    {
      write (fd, &ll, sizeof (ll));
      close (fd);
    }
#  else
  if ((fd = open (fname, 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                        /* LASTLOG_IS_DIR */
# endif                         /* HAVE_STRUCT_LASTLOG */
}
#endif                          /* LASTLOG_SUPPORT */

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

Revision:	1.6
Committed:	Sun Jan 22 00:58:18 2006 UTC (20 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.5:	+4 -4 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.6	// This file is part of libptytty. Do not make local modifications.
2			// http://software.schmorp.de/pkg/libptytty
3
4			/----------------------------------------------------------------------
5	root	1.1	* 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	root	1.2	* Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
21	root	1.1	*
22			* This program is free software; you can redistribute it and/or modify
23			* it under the terms of the GNU General Public License as published by
24			* the Free Software Foundation; either version 2 of the License, or
25			* (at your option) any later version.
26			*
27			* This program is distributed in the hope that it will be useful,
28			* but WITHOUT ANY WARRANTY; without even the implied warranty of
29			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30			* GNU General Public License for more details.
31			*
32			* You should have received a copy of the GNU General Public License
33			* along with this program; if not, write to the Free Software
34			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
35			----------------------------------------------------------------------/
36
37	root	1.2	#include "../config.h"
38	root	1.4
39	root	1.2	#include "ptytty.h"
40
41			#if UTMP_SUPPORT
42	root	1.1
43			#if HAVE_STRUCT_UTMP
44	root	1.3	static int write_bsd_utmp (int utmp_pos, struct utmp *wu);
45			static void update_wtmp (const char fname, const struct utmp putmp);
46	root	1.1	#endif
47
48	root	1.3	static void update_lastlog (const char fname, const char pty, const char *host);
49	root	1.1
50			/*
51			* BSD style utmp entry
52			* ut_line, ut_name, ut_host, ut_time
53			* SYSV style utmp (and utmpx) entry
54			* ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time
55			*/
56
57			/* ------------------------------------------------------------------------- */
58
59			/*
60			* make and write utmp and wtmp entries
61			*/
62			void
63	root	1.3	ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
64	root	1.1	{
65	root	1.2	const char *pty = name;
66
67			if (!pty \|\| !*pty)
68			return;
69
70			this->cmd_pid = cmd_pid;
71			this->login_shell = login_shell;
72
73	root	1.1	#ifdef HAVE_STRUCT_UTMP
74			struct utmp *ut = &this->ut;
75			#endif
76			#ifdef HAVE_STRUCT_UTMPX
77			struct utmpx *utx = &this->utx;
78			#endif
79			int i;
80			struct passwd *pwent = getpwuid (getuid ());
81
82			if (!strncmp (pty, "/dev/", 5))
83			pty += 5; /* skip /dev/ prefix */
84
85	root	1.2	#if defined(HAVE_UTMP_PID) \|\| defined(HAVE_STRUCT_UTMPX)
86	root	1.1	if (!strncmp (pty, "pty", 3) \|\| !strncmp (pty, "tty", 3))
87			strncpy (ut_id, pty + 3, sizeof (ut_id));
88			else if (sscanf (pty, "pts/%d", &i) == 1)
89			sprintf (ut_id, "vt%02x", (i & 0xff)); /* sysv naming */
90			else if (strncmp (pty, "pty", 3) && strncmp (pty, "tty", 3))
91			{
92	root	1.3	warn ("can't parse tty name \"%s\", not adding utmp entry.\n", pty);
93	root	1.1	return;
94			}
95			#endif
96
97			#ifdef HAVE_STRUCT_UTMP
98			memset (ut, 0, sizeof (struct utmp));
99			# ifdef HAVE_UTMP_PID
100			setutent ();
101			strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
102			ut->ut_type = DEAD_PROCESS;
103			getutid (ut); /* position to entry in utmp file */
104	root	1.2	strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
105	root	1.1	# endif
106			#endif
107
108			#ifdef HAVE_STRUCT_UTMPX
109			memset (utx, 0, sizeof (struct utmpx));
110			setutxent ();
111			strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
112			utx->ut_type = DEAD_PROCESS;
113			getutxid (utx); /* position to entry in utmp file */
114	root	1.2	strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
115	root	1.1	#endif
116
117			#ifdef HAVE_STRUCT_UTMP
118			strncpy (ut->ut_line, pty, sizeof (ut->ut_line));
119			ut->ut_time = time (NULL);
120			# ifdef HAVE_UTMP_PID
121			strncpy (ut->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
122			sizeof (ut->ut_user));
123			strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
124			ut->ut_time = time (NULL);
125			ut->ut_pid = cmd_pid;
126			# ifdef HAVE_UTMP_HOST
127			strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
128			# endif
129			ut->ut_type = USER_PROCESS;
130			pututline (ut);
131			endutent (); /* close the file */
132			utmp_pos = 0;
133			# else
134			strncpy (ut->ut_name, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
135			sizeof (ut->ut_name));
136			# ifdef HAVE_UTMP_HOST
137			strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
138			# endif
139			# endif
140			#endif
141
142			#ifdef HAVE_STRUCT_UTMPX
143			strncpy (utx->ut_line, pty, sizeof (utx->ut_line));
144			strncpy (utx->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
145			sizeof (utx->ut_user));
146			strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
147			# if HAVE_UTMPX_SESSION
148			utx->ut_session = getsid (0);
149			# endif
150			utx->ut_tv.tv_sec = time (NULL);
151			utx->ut_tv.tv_usec = 0;
152			utx->ut_pid = cmd_pid;
153			# ifdef HAVE_UTMPX_HOST
154			strncpy (utx->ut_host, hostname, sizeof (utx->ut_host));
155			# if 0
156			{
157			char *colon;
158
159			if ((colon = strrchr (ut->ut_host, ':')) != NULL)
160			*colon = '\0';
161			}
162			# endif
163			# endif
164			utx->ut_type = USER_PROCESS;
165			pututxline (utx);
166			endutxent (); /* close the file */
167			utmp_pos = 0;
168			#endif
169
170			#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
171			{
172			# ifdef HAVE_TTYSLOT
173	root	1.2	int fdstdin = dup (STDIN_FILENO);
174			dup2 (tty, STDIN_FILENO);
175
176	root	1.1	i = ttyslot ();
177	root	1.3	if (write_bsd_utmp (i, ut))
178	root	1.1	utmp_pos = i;
179	root	1.2
180			dup2 (fdstdin, STDIN_FILENO);
181			close (fdstdin);
182	root	1.1	# else
183	root	1.2	FILE *fd0;
184	root	1.1
185			if ((fd0 = fopen (TTYTAB_FILENAME, "r")) != NULL)
186			{
187			char buf[256], name[256];
188
189			buf[sizeof (buf) - 1] = '\0';
190			for (i = 1; (fgets (buf, sizeof (buf) - 1, fd0) != NULL);)
191			{
192			if (*buf == '#' \|\| sscanf (buf, "%s", name) != 1)
193			continue;
194			if (!strcmp (ut->ut_line, name))
195			{
196	root	1.3	if (!write_bsd_utmp (i, ut))
197	root	1.1	i = 0;
198			utmp_pos = i;
199			fclose (fd0);
200			break;
201			}
202			i++;
203			}
204			fclose (fd0);
205			}
206			# endif
207			}
208			#endif
209
210			#ifdef WTMP_SUPPORT
211	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
212			if (login_shell)
213			#endif
214	root	1.1	{
215			# ifdef HAVE_STRUCT_UTMP
216			# ifdef HAVE_UPDWTMP
217	root	1.3	updwtmp (WTMP_FILE, ut);
218	root	1.1	# else
219	root	1.3	update_wtmp (WTMP_FILE, ut);
220	root	1.1	# endif
221			# endif
222	root	1.2	# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
223	root	1.3	updwtmpx (WTMPX_FILE, utx);
224	root	1.1	# endif
225			}
226			#endif
227	root	1.3	#if defined(LASTLOG_SUPPORT) && defined(LASTLOG_FILE)
228	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
229			if (login_shell)
230			#endif
231	root	1.3	update_lastlog (LASTLOG_FILE, pty, hostname);
232	root	1.1	#endif
233			}
234
235			/* ------------------------------------------------------------------------- */
236			/*
237			* remove utmp and wtmp entries
238			*/
239			void
240	root	1.3	ptytty_unix::logout ()
241	root	1.1	{
242	root	1.2	if (!cmd_pid)
243			return;
244
245	root	1.1	#ifdef HAVE_STRUCT_UTMP
246	root	1.2	struct utmp tmput, ut = &this->ut;
247	root	1.1	#endif
248			#ifdef HAVE_STRUCT_UTMPX
249			struct utmpx tmputx, utx = &this->utx;
250			#endif
251
252			#ifdef HAVE_STRUCT_UTMP
253			# ifdef HAVE_UTMP_PID
254			memset (ut, 0, sizeof (struct utmp));
255			setutent ();
256	root	1.2	strncpy (ut->ut_id, this->ut_id, sizeof (ut->ut_id));
257	root	1.1	ut->ut_type = USER_PROCESS;
258	root	1.2	if ((tmput = getutid (ut))) /* position to entry in utmp file */
259			ut = tmput;
260	root	1.1	ut->ut_type = DEAD_PROCESS;
261			# else
262			memset (ut->ut_name, 0, sizeof (ut->ut_name));
263			# ifdef HAVE_UTMP_HOST
264			memset (ut->ut_host, 0, sizeof (ut->ut_host));
265			# endif
266			# endif
267			ut->ut_time = time (NULL);
268			#endif
269
270			#ifdef HAVE_STRUCT_UTMPX
271			memset (utx, 0, sizeof (struct utmpx));
272			setutxent ();
273	root	1.2	strncpy (utx->ut_id, this->ut_id, sizeof (utx->ut_id));
274	root	1.1	utx->ut_type = USER_PROCESS;
275			if ((tmputx = getutxid (utx))) /* position to entry in utmp file */
276			utx = tmputx;
277			utx->ut_type = DEAD_PROCESS;
278			# if HAVE_UTMPX_SESSION
279			utx->ut_session = getsid (0);
280			# endif
281			utx->ut_tv.tv_sec = time (NULL);
282			utx->ut_tv.tv_usec = 0;
283			#endif
284
285			/*
286			* Write ending wtmp entry
287			*/
288			#ifdef WTMP_SUPPORT
289	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
290			if (login_shell)
291			#endif
292	root	1.1	{
293			# ifdef HAVE_STRUCT_UTMP
294			# ifdef HAVE_UPDWTMP
295	root	1.3	updwtmp (WTMP_FILE, ut);
296	root	1.1	# else
297	root	1.3	update_wtmp (WTMP_FILE, ut);
298	root	1.1	# endif
299			# endif
300	root	1.2	# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
301	root	1.3	updwtmpx (WTMPX_FILE, utx);
302	root	1.1	# endif
303			}
304			#endif
305
306			/*
307			* Write utmp entry
308			*/
309			#ifdef HAVE_STRUCT_UTMP
310			# ifdef HAVE_UTMP_PID
311			if (ut->ut_pid == cmd_pid)
312			pututline (ut);
313			endutent ();
314			# else
315			memset (ut, 0, sizeof (struct utmp));
316	root	1.3	write_bsd_utmp (utmp_pos, ut);
317	root	1.1	# endif
318			#endif
319			#ifdef HAVE_STRUCT_UTMPX
320			if (utx->ut_pid == cmd_pid)
321			pututxline (utx);
322			endutxent ();
323			#endif
324	root	1.2
325			cmd_pid = 0;
326	root	1.1	}
327
328			/* ------------------------------------------------------------------------- */
329			/*
330			* Write a BSD style utmp entry
331			*/
332	root	1.2	#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
333			static int
334	root	1.3	write_bsd_utmp (int utmp_pos, struct utmp *wu)
335	root	1.1	{
336			int fd;
337
338	root	1.3	if (utmp_pos <= 0 \|\| (fd = open (UTMP_FILE, O_WRONLY)) == -1)
339	root	1.1	return 0;
340
341			if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1)
342			write (fd, wu, sizeof (struct utmp));
343			close (fd);
344			return 1;
345			}
346			#endif
347
348			/* ------------------------------------------------------------------------- */
349			/*
350			* Update a BSD style wtmp entry
351			*/
352			#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) && defined(HAVE_STRUCT_UTMP)
353	root	1.2	static void
354	root	1.3	update_wtmp (const char fname, const struct utmp putmp)
355	root	1.1	{
356			int fd, gotlock, retry;
357			struct flock lck; /* fcntl locking scheme */
358			struct stat sbuf;
359
360			if ((fd = open (fname, O_WRONLY \| O_APPEND, 0)) < 0)
361			return;
362
363			lck.l_whence = SEEK_END; /* start lock at current eof */
364			lck.l_len = 0; /* end at ``largest possible eof'' */
365			lck.l_start = 0;
366			lck.l_type = F_WRLCK; /* we want a write lock */
367
368			/* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */
369			for (retry = 10, gotlock = 0; retry--;)
370			if (fcntl (fd, F_SETLK, &lck) != -1)
371			{
372			gotlock = 1;
373			break;
374			}
375			else if (errno != EAGAIN && errno != EACCES)
376			break;
377			if (!gotlock)
378			{ /* give it up */
379			close (fd);
380			return;
381			}
382			if (fstat (fd, &sbuf) == 0)
383			if (write (fd, putmp, sizeof (struct utmp)) != sizeof (struct utmp))
384			ftruncate (fd, sbuf.st_size); /* remove bad writes */
385
386			lck.l_type = F_UNLCK; /* unlocking the file */
387			fcntl (fd, F_SETLK, &lck);
388			close (fd);
389			}
390			#endif
391
392			/* ------------------------------------------------------------------------- */
393			#ifdef LASTLOG_SUPPORT
394	root	1.2	static void
395	root	1.3	update_lastlog (const char fname, const char pty, const char *host)
396	root	1.1	{
397			# ifdef HAVE_STRUCT_LASTLOGX
398			struct lastlogx llx;
399			# endif
400			# ifdef HAVE_STRUCT_LASTLOG
401			int fd;
402			struct lastlog ll;
403			# ifdef LASTLOG_IS_DIR
404			char lastlogfile[256];
405			# endif
406			struct passwd *pwent;
407			# endif
408
409			# ifdef HAVE_STRUCT_LASTLOGX
410			memset (&llx, 0, sizeof (llx));
411			llx.ll_tv.tv_sec = time (NULL);
412			llx.ll_tv.tv_usec = 0;
413			strncpy (llx.ll_line, pty, sizeof (llx.ll_line));
414			strncpy (llx.ll_host, host, sizeof (llx.ll_host));
415	root	1.3	updlastlogx (LASTLOGX_FILE, getuid (), &llx);
416	root	1.1	# endif
417
418			# ifdef HAVE_STRUCT_LASTLOG
419			pwent = getpwuid (getuid ());
420			if (!pwent)
421			{
422	root	1.3	warn ("no entry in password file, not updating lastlog.\n");
423	root	1.1	return;
424			}
425
426			memset (&ll, 0, sizeof (ll));
427			ll.ll_time = time (NULL);
428			strncpy (ll.ll_line, pty, sizeof (ll.ll_line));
429			strncpy (ll.ll_host, host, sizeof (ll.ll_host));
430			# ifdef LASTLOG_IS_DIR
431			sprintf (lastlogfile, "%.s/%.s",
432			sizeof (lastlogfile) - sizeof (pwent->pw_name) - 2, fname,
433			sizeof (pwent->pw_name),
434			(!pwent->pw_name \|\| pwent->pw_name[0] == '\0') ? "unknown"
435			: pwent->pw_name);
436			if ((fd = open (lastlogfile, O_WRONLY \| O_CREAT, 0644)) >= 0)
437			{
438			write (fd, &ll, sizeof (ll));
439			close (fd);
440			}
441			# else
442			if ((fd = open (fname, O_RDWR)) != -1)
443			{
444			if (lseek (fd, (off_t) ((long)pwent->pw_uid * sizeof (ll)),
445			SEEK_SET) != -1)
446			write (fd, &ll, sizeof (ll));
447			close (fd);
448			}
449			# endif /* LASTLOG_IS_DIR */
450			# endif /* HAVE_STRUCT_LASTLOG */
451			}
452			#endif /* LASTLOG_SUPPORT */
453
454	root	1.5	#else
455			void
456			ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
457			{
458			}
459			#endif
460