libptytty/src/logging.C

/*--------------------------------*-C-*---------------------------------*
 * 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 "rxvt.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 */
/* ------------------------------------------------------------------------- */

#endif                          /* UTMP_SUPPORT */
Revision:	1.3
Committed:	Sat Jan 21 22:10:45 2006 UTC (20 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+23 -23 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/---------------------------------C----------------------------------
2			* File: logging.C
3			----------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6			* Copyright (c) 1992 John Bovey <jdb@ukc.ac.uk>
7			* - original version
8			* Copyright (c) 1993 lipka
9			* Copyright (c) 1993 Brian Stempien <stempien@cs.wmich.edu>
10			* Copyright (c) 1995 Raul Garcia Garcia <rgg@tid.es>
11			* Copyright (c) 1995 Piet W. Plomp <piet@idefix.icce.rug.nl>
12			* Copyright (c) 1997 Raul Garcia Garcia <rgg@tid.es>
13			* Copyright (c) 1998-2001 Geoff Wing <gcw@pobox.com>
14			* - extensive modifications
15			* Copyright (c) 1999 D J Hawkey Jr <hawkeyd@visi.com>
16			* - lastlog support
17	root	1.2	* Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
18	root	1.1	*
19			* This program is free software; you can redistribute it and/or modify
20			* it under the terms of the GNU General Public License as published by
21			* the Free Software Foundation; either version 2 of the License, or
22			* (at your option) any later version.
23			*
24			* This program is distributed in the hope that it will be useful,
25			* but WITHOUT ANY WARRANTY; without even the implied warranty of
26			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27			* GNU General Public License for more details.
28			*
29			* You should have received a copy of the GNU General Public License
30			* along with this program; if not, write to the Free Software
31			* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
32			----------------------------------------------------------------------/
33
34	root	1.2	#include "../config.h"
35			#include "rxvt.h"
36			#include "ptytty.h"
37
38			#if UTMP_SUPPORT
39	root	1.1
40			#if HAVE_STRUCT_UTMP
41	root	1.3	static int write_bsd_utmp (int utmp_pos, struct utmp *wu);
42			static void update_wtmp (const char fname, const struct utmp putmp);
43	root	1.1	#endif
44
45	root	1.3	static void update_lastlog (const char fname, const char pty, const char *host);
46	root	1.1
47			/*
48			* BSD style utmp entry
49			* ut_line, ut_name, ut_host, ut_time
50			* SYSV style utmp (and utmpx) entry
51			* ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time
52			*/
53
54			/* ------------------------------------------------------------------------- */
55
56			/*
57			* make and write utmp and wtmp entries
58			*/
59			void
60	root	1.3	ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
61	root	1.1	{
62	root	1.2	const char *pty = name;
63
64			if (!pty \|\| !*pty)
65			return;
66
67			this->cmd_pid = cmd_pid;
68			this->login_shell = login_shell;
69
70	root	1.1	#ifdef HAVE_STRUCT_UTMP
71			struct utmp *ut = &this->ut;
72			#endif
73			#ifdef HAVE_STRUCT_UTMPX
74			struct utmpx *utx = &this->utx;
75			#endif
76			int i;
77			struct passwd *pwent = getpwuid (getuid ());
78
79			if (!strncmp (pty, "/dev/", 5))
80			pty += 5; /* skip /dev/ prefix */
81
82	root	1.2	#if defined(HAVE_UTMP_PID) \|\| defined(HAVE_STRUCT_UTMPX)
83	root	1.1	if (!strncmp (pty, "pty", 3) \|\| !strncmp (pty, "tty", 3))
84			strncpy (ut_id, pty + 3, sizeof (ut_id));
85			else if (sscanf (pty, "pts/%d", &i) == 1)
86			sprintf (ut_id, "vt%02x", (i & 0xff)); /* sysv naming */
87			else if (strncmp (pty, "pty", 3) && strncmp (pty, "tty", 3))
88			{
89	root	1.3	warn ("can't parse tty name \"%s\", not adding utmp entry.\n", pty);
90	root	1.1	return;
91			}
92			#endif
93
94			#ifdef HAVE_STRUCT_UTMP
95			memset (ut, 0, sizeof (struct utmp));
96			# ifdef HAVE_UTMP_PID
97			setutent ();
98			strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
99			ut->ut_type = DEAD_PROCESS;
100			getutid (ut); /* position to entry in utmp file */
101	root	1.2	strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
102	root	1.1	# endif
103			#endif
104
105			#ifdef HAVE_STRUCT_UTMPX
106			memset (utx, 0, sizeof (struct utmpx));
107			setutxent ();
108			strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
109			utx->ut_type = DEAD_PROCESS;
110			getutxid (utx); /* position to entry in utmp file */
111	root	1.2	strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
112	root	1.1	#endif
113
114			#ifdef HAVE_STRUCT_UTMP
115			strncpy (ut->ut_line, pty, sizeof (ut->ut_line));
116			ut->ut_time = time (NULL);
117			# ifdef HAVE_UTMP_PID
118			strncpy (ut->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
119			sizeof (ut->ut_user));
120			strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
121			ut->ut_time = time (NULL);
122			ut->ut_pid = cmd_pid;
123			# ifdef HAVE_UTMP_HOST
124			strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
125			# endif
126			ut->ut_type = USER_PROCESS;
127			pututline (ut);
128			endutent (); /* close the file */
129			utmp_pos = 0;
130			# else
131			strncpy (ut->ut_name, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
132			sizeof (ut->ut_name));
133			# ifdef HAVE_UTMP_HOST
134			strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
135			# endif
136			# endif
137			#endif
138
139			#ifdef HAVE_STRUCT_UTMPX
140			strncpy (utx->ut_line, pty, sizeof (utx->ut_line));
141			strncpy (utx->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
142			sizeof (utx->ut_user));
143			strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
144			# if HAVE_UTMPX_SESSION
145			utx->ut_session = getsid (0);
146			# endif
147			utx->ut_tv.tv_sec = time (NULL);
148			utx->ut_tv.tv_usec = 0;
149			utx->ut_pid = cmd_pid;
150			# ifdef HAVE_UTMPX_HOST
151			strncpy (utx->ut_host, hostname, sizeof (utx->ut_host));
152			# if 0
153			{
154			char *colon;
155
156			if ((colon = strrchr (ut->ut_host, ':')) != NULL)
157			*colon = '\0';
158			}
159			# endif
160			# endif
161			utx->ut_type = USER_PROCESS;
162			pututxline (utx);
163			endutxent (); /* close the file */
164			utmp_pos = 0;
165			#endif
166
167			#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
168			{
169			# ifdef HAVE_TTYSLOT
170	root	1.2	int fdstdin = dup (STDIN_FILENO);
171			dup2 (tty, STDIN_FILENO);
172
173	root	1.1	i = ttyslot ();
174	root	1.3	if (write_bsd_utmp (i, ut))
175	root	1.1	utmp_pos = i;
176	root	1.2
177			dup2 (fdstdin, STDIN_FILENO);
178			close (fdstdin);
179	root	1.1	# else
180	root	1.2	FILE *fd0;
181	root	1.1
182			if ((fd0 = fopen (TTYTAB_FILENAME, "r")) != NULL)
183			{
184			char buf[256], name[256];
185
186			buf[sizeof (buf) - 1] = '\0';
187			for (i = 1; (fgets (buf, sizeof (buf) - 1, fd0) != NULL);)
188			{
189			if (*buf == '#' \|\| sscanf (buf, "%s", name) != 1)
190			continue;
191			if (!strcmp (ut->ut_line, name))
192			{
193	root	1.3	if (!write_bsd_utmp (i, ut))
194	root	1.1	i = 0;
195			utmp_pos = i;
196			fclose (fd0);
197			break;
198			}
199			i++;
200			}
201			fclose (fd0);
202			}
203			# endif
204			}
205			#endif
206
207			#ifdef WTMP_SUPPORT
208	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
209			if (login_shell)
210			#endif
211	root	1.1	{
212			# ifdef HAVE_STRUCT_UTMP
213			# ifdef HAVE_UPDWTMP
214	root	1.3	updwtmp (WTMP_FILE, ut);
215	root	1.1	# else
216	root	1.3	update_wtmp (WTMP_FILE, ut);
217	root	1.1	# endif
218			# endif
219	root	1.2	# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
220	root	1.3	updwtmpx (WTMPX_FILE, utx);
221	root	1.1	# endif
222			}
223			#endif
224	root	1.3	#if defined(LASTLOG_SUPPORT) && defined(LASTLOG_FILE)
225	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
226			if (login_shell)
227			#endif
228	root	1.3	update_lastlog (LASTLOG_FILE, pty, hostname);
229	root	1.1	#endif
230			}
231
232			/* ------------------------------------------------------------------------- */
233			/*
234			* remove utmp and wtmp entries
235			*/
236			void
237	root	1.3	ptytty_unix::logout ()
238	root	1.1	{
239	root	1.2	if (!cmd_pid)
240			return;
241
242	root	1.1	#ifdef HAVE_STRUCT_UTMP
243	root	1.2	struct utmp tmput, ut = &this->ut;
244	root	1.1	#endif
245			#ifdef HAVE_STRUCT_UTMPX
246			struct utmpx tmputx, utx = &this->utx;
247			#endif
248
249			#ifdef HAVE_STRUCT_UTMP
250			# ifdef HAVE_UTMP_PID
251			memset (ut, 0, sizeof (struct utmp));
252			setutent ();
253	root	1.2	strncpy (ut->ut_id, this->ut_id, sizeof (ut->ut_id));
254	root	1.1	ut->ut_type = USER_PROCESS;
255	root	1.2	if ((tmput = getutid (ut))) /* position to entry in utmp file */
256			ut = tmput;
257	root	1.1	ut->ut_type = DEAD_PROCESS;
258			# else
259			memset (ut->ut_name, 0, sizeof (ut->ut_name));
260			# ifdef HAVE_UTMP_HOST
261			memset (ut->ut_host, 0, sizeof (ut->ut_host));
262			# endif
263			# endif
264			ut->ut_time = time (NULL);
265			#endif
266
267			#ifdef HAVE_STRUCT_UTMPX
268			memset (utx, 0, sizeof (struct utmpx));
269			setutxent ();
270	root	1.2	strncpy (utx->ut_id, this->ut_id, sizeof (utx->ut_id));
271	root	1.1	utx->ut_type = USER_PROCESS;
272			if ((tmputx = getutxid (utx))) /* position to entry in utmp file */
273			utx = tmputx;
274			utx->ut_type = DEAD_PROCESS;
275			# if HAVE_UTMPX_SESSION
276			utx->ut_session = getsid (0);
277			# endif
278			utx->ut_tv.tv_sec = time (NULL);
279			utx->ut_tv.tv_usec = 0;
280			#endif
281
282			/*
283			* Write ending wtmp entry
284			*/
285			#ifdef WTMP_SUPPORT
286	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
287			if (login_shell)
288			#endif
289	root	1.1	{
290			# ifdef HAVE_STRUCT_UTMP
291			# ifdef HAVE_UPDWTMP
292	root	1.3	updwtmp (WTMP_FILE, ut);
293	root	1.1	# else
294	root	1.3	update_wtmp (WTMP_FILE, ut);
295	root	1.1	# endif
296			# endif
297	root	1.2	# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
298	root	1.3	updwtmpx (WTMPX_FILE, utx);
299	root	1.1	# endif
300			}
301			#endif
302
303			/*
304			* Write utmp entry
305			*/
306			#ifdef HAVE_STRUCT_UTMP
307			# ifdef HAVE_UTMP_PID
308			if (ut->ut_pid == cmd_pid)
309			pututline (ut);
310			endutent ();
311			# else
312			memset (ut, 0, sizeof (struct utmp));
313	root	1.3	write_bsd_utmp (utmp_pos, ut);
314	root	1.1	# endif
315			#endif
316			#ifdef HAVE_STRUCT_UTMPX
317			if (utx->ut_pid == cmd_pid)
318			pututxline (utx);
319			endutxent ();
320			#endif
321	root	1.2
322			cmd_pid = 0;
323	root	1.1	}
324
325			/* ------------------------------------------------------------------------- */
326			/*
327			* Write a BSD style utmp entry
328			*/
329	root	1.2	#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
330			static int
331	root	1.3	write_bsd_utmp (int utmp_pos, struct utmp *wu)
332	root	1.1	{
333			int fd;
334
335	root	1.3	if (utmp_pos <= 0 \|\| (fd = open (UTMP_FILE, O_WRONLY)) == -1)
336	root	1.1	return 0;
337
338			if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1)
339			write (fd, wu, sizeof (struct utmp));
340			close (fd);
341			return 1;
342			}
343			#endif
344
345			/* ------------------------------------------------------------------------- */
346			/*
347			* Update a BSD style wtmp entry
348			*/
349			#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) && defined(HAVE_STRUCT_UTMP)
350	root	1.2	static void
351	root	1.3	update_wtmp (const char fname, const struct utmp putmp)
352	root	1.1	{
353			int fd, gotlock, retry;
354			struct flock lck; /* fcntl locking scheme */
355			struct stat sbuf;
356
357			if ((fd = open (fname, O_WRONLY \| O_APPEND, 0)) < 0)
358			return;
359
360			lck.l_whence = SEEK_END; /* start lock at current eof */
361			lck.l_len = 0; /* end at ``largest possible eof'' */
362			lck.l_start = 0;
363			lck.l_type = F_WRLCK; /* we want a write lock */
364
365			/* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */
366			for (retry = 10, gotlock = 0; retry--;)
367			if (fcntl (fd, F_SETLK, &lck) != -1)
368			{
369			gotlock = 1;
370			break;
371			}
372			else if (errno != EAGAIN && errno != EACCES)
373			break;
374			if (!gotlock)
375			{ /* give it up */
376			close (fd);
377			return;
378			}
379			if (fstat (fd, &sbuf) == 0)
380			if (write (fd, putmp, sizeof (struct utmp)) != sizeof (struct utmp))
381			ftruncate (fd, sbuf.st_size); /* remove bad writes */
382
383			lck.l_type = F_UNLCK; /* unlocking the file */
384			fcntl (fd, F_SETLK, &lck);
385			close (fd);
386			}
387			#endif
388
389			/* ------------------------------------------------------------------------- */
390			#ifdef LASTLOG_SUPPORT
391	root	1.2	static void
392	root	1.3	update_lastlog (const char fname, const char pty, const char *host)
393	root	1.1	{
394			# ifdef HAVE_STRUCT_LASTLOGX
395			struct lastlogx llx;
396			# endif
397			# ifdef HAVE_STRUCT_LASTLOG
398			int fd;
399			struct lastlog ll;
400			# ifdef LASTLOG_IS_DIR
401			char lastlogfile[256];
402			# endif
403			struct passwd *pwent;
404			# endif
405
406			# ifdef HAVE_STRUCT_LASTLOGX
407			memset (&llx, 0, sizeof (llx));
408			llx.ll_tv.tv_sec = time (NULL);
409			llx.ll_tv.tv_usec = 0;
410			strncpy (llx.ll_line, pty, sizeof (llx.ll_line));
411			strncpy (llx.ll_host, host, sizeof (llx.ll_host));
412	root	1.3	updlastlogx (LASTLOGX_FILE, getuid (), &llx);
413	root	1.1	# endif
414
415			# ifdef HAVE_STRUCT_LASTLOG
416			pwent = getpwuid (getuid ());
417			if (!pwent)
418			{
419	root	1.3	warn ("no entry in password file, not updating lastlog.\n");
420	root	1.1	return;
421			}
422
423			memset (&ll, 0, sizeof (ll));
424			ll.ll_time = time (NULL);
425			strncpy (ll.ll_line, pty, sizeof (ll.ll_line));
426			strncpy (ll.ll_host, host, sizeof (ll.ll_host));
427			# ifdef LASTLOG_IS_DIR
428			sprintf (lastlogfile, "%.s/%.s",
429			sizeof (lastlogfile) - sizeof (pwent->pw_name) - 2, fname,
430			sizeof (pwent->pw_name),
431			(!pwent->pw_name \|\| pwent->pw_name[0] == '\0') ? "unknown"
432			: pwent->pw_name);
433			if ((fd = open (lastlogfile, O_WRONLY \| O_CREAT, 0644)) >= 0)
434			{
435			write (fd, &ll, sizeof (ll));
436			close (fd);
437			}
438			# else
439			if ((fd = open (fname, O_RDWR)) != -1)
440			{
441			if (lseek (fd, (off_t) ((long)pwent->pw_uid * sizeof (ll)),
442			SEEK_SET) != -1)
443			write (fd, &ll, sizeof (ll));
444			close (fd);
445			}
446			# endif /* LASTLOG_IS_DIR */
447			# endif /* HAVE_STRUCT_LASTLOG */
448			}
449			#endif /* LASTLOG_SUPPORT */
450			/* ------------------------------------------------------------------------- */
451
452			#endif /* UTMP_SUPPORT */