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>
 * 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

#include <cstdio>

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

#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))
    {
      ptytty_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)
    {
      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));
#  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:	1.10
Committed:	Wed Jan 25 11:14:26 2006 UTC (20 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-0_1, rel-0_2, rel-1_0, rel-1_1, rel-1_2
Changes since 1.9:	+5 -5 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	1.9	* Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
22	root	1.1	*
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	root	1.2	#include "../config.h"
39	root	1.4
40	root	1.10	#include "ptytty.h"
41
42			#if UTMP_SUPPORT
43
44	root	1.7	#include <cstdio>
45
46			#include <sys/types.h>
47			#include <sys/stat.h>
48			#include <sys/fcntl.h>
49			#include <unistd.h>
50			#include <time.h>
51
52	root	1.1	#if HAVE_STRUCT_UTMP
53	root	1.3	static int write_bsd_utmp (int utmp_pos, struct utmp *wu);
54			static void update_wtmp (const char fname, const struct utmp putmp);
55	root	1.1	#endif
56
57	root	1.3	static void update_lastlog (const char fname, const char pty, const char *host);
58	root	1.1
59			/*
60			* BSD style utmp entry
61			* ut_line, ut_name, ut_host, ut_time
62			* SYSV style utmp (and utmpx) entry
63			* ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time
64			*/
65
66			/* ------------------------------------------------------------------------- */
67
68			/*
69			* make and write utmp and wtmp entries
70			*/
71			void
72	root	1.3	ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
73	root	1.1	{
74	root	1.2	const char *pty = name;
75
76			if (!pty \|\| !*pty)
77			return;
78
79			this->cmd_pid = cmd_pid;
80			this->login_shell = login_shell;
81
82	root	1.1	#ifdef HAVE_STRUCT_UTMP
83			struct utmp *ut = &this->ut;
84			#endif
85			#ifdef HAVE_STRUCT_UTMPX
86			struct utmpx *utx = &this->utx;
87			#endif
88			int i;
89			struct passwd *pwent = getpwuid (getuid ());
90
91			if (!strncmp (pty, "/dev/", 5))
92			pty += 5; /* skip /dev/ prefix */
93
94	root	1.2	#if defined(HAVE_UTMP_PID) \|\| defined(HAVE_STRUCT_UTMPX)
95	root	1.1	if (!strncmp (pty, "pty", 3) \|\| !strncmp (pty, "tty", 3))
96			strncpy (ut_id, pty + 3, sizeof (ut_id));
97			else if (sscanf (pty, "pts/%d", &i) == 1)
98			sprintf (ut_id, "vt%02x", (i & 0xff)); /* sysv naming */
99			else if (strncmp (pty, "pty", 3) && strncmp (pty, "tty", 3))
100			{
101	root	1.7	ptytty_warn ("can't parse tty name \"%s\", not adding utmp entry.\n", pty);
102	root	1.1	return;
103			}
104			#endif
105
106			#ifdef HAVE_STRUCT_UTMP
107			memset (ut, 0, sizeof (struct utmp));
108			# ifdef HAVE_UTMP_PID
109			setutent ();
110			strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
111			ut->ut_type = DEAD_PROCESS;
112			getutid (ut); /* position to entry in utmp file */
113	root	1.2	strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
114	root	1.1	# endif
115			#endif
116
117			#ifdef HAVE_STRUCT_UTMPX
118			memset (utx, 0, sizeof (struct utmpx));
119			setutxent ();
120			strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
121			utx->ut_type = DEAD_PROCESS;
122			getutxid (utx); /* position to entry in utmp file */
123	root	1.2	strncpy (this->ut_id, ut_id, sizeof (this->ut_id));
124	root	1.1	#endif
125
126			#ifdef HAVE_STRUCT_UTMP
127			strncpy (ut->ut_line, pty, sizeof (ut->ut_line));
128			ut->ut_time = time (NULL);
129			# ifdef HAVE_UTMP_PID
130			strncpy (ut->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
131			sizeof (ut->ut_user));
132			strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id));
133			ut->ut_time = time (NULL);
134			ut->ut_pid = cmd_pid;
135			# ifdef HAVE_UTMP_HOST
136			strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
137			# endif
138			ut->ut_type = USER_PROCESS;
139			pututline (ut);
140			endutent (); /* close the file */
141			utmp_pos = 0;
142			# else
143			strncpy (ut->ut_name, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
144			sizeof (ut->ut_name));
145			# ifdef HAVE_UTMP_HOST
146			strncpy (ut->ut_host, hostname, sizeof (ut->ut_host));
147			# endif
148			# endif
149			#endif
150
151			#ifdef HAVE_STRUCT_UTMPX
152			strncpy (utx->ut_line, pty, sizeof (utx->ut_line));
153			strncpy (utx->ut_user, (pwent && pwent->pw_name) ? pwent->pw_name : "?",
154			sizeof (utx->ut_user));
155			strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id));
156			# if HAVE_UTMPX_SESSION
157			utx->ut_session = getsid (0);
158			# endif
159			utx->ut_tv.tv_sec = time (NULL);
160			utx->ut_tv.tv_usec = 0;
161			utx->ut_pid = cmd_pid;
162			# ifdef HAVE_UTMPX_HOST
163			strncpy (utx->ut_host, hostname, sizeof (utx->ut_host));
164			# if 0
165			{
166			char *colon;
167
168			if ((colon = strrchr (ut->ut_host, ':')) != NULL)
169			*colon = '\0';
170			}
171			# endif
172			# endif
173			utx->ut_type = USER_PROCESS;
174			pututxline (utx);
175			endutxent (); /* close the file */
176			utmp_pos = 0;
177			#endif
178
179			#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
180			{
181			# ifdef HAVE_TTYSLOT
182	root	1.2	int fdstdin = dup (STDIN_FILENO);
183			dup2 (tty, STDIN_FILENO);
184
185	root	1.1	i = ttyslot ();
186	root	1.3	if (write_bsd_utmp (i, ut))
187	root	1.1	utmp_pos = i;
188	root	1.2
189			dup2 (fdstdin, STDIN_FILENO);
190			close (fdstdin);
191	root	1.1	# else
192	root	1.2	FILE *fd0;
193	root	1.1
194			if ((fd0 = fopen (TTYTAB_FILENAME, "r")) != NULL)
195			{
196			char buf[256], name[256];
197
198			buf[sizeof (buf) - 1] = '\0';
199			for (i = 1; (fgets (buf, sizeof (buf) - 1, fd0) != NULL);)
200			{
201			if (*buf == '#' \|\| sscanf (buf, "%s", name) != 1)
202			continue;
203			if (!strcmp (ut->ut_line, name))
204			{
205	root	1.3	if (!write_bsd_utmp (i, ut))
206	root	1.1	i = 0;
207			utmp_pos = i;
208			fclose (fd0);
209			break;
210			}
211			i++;
212			}
213			fclose (fd0);
214			}
215			# endif
216			}
217			#endif
218
219			#ifdef WTMP_SUPPORT
220	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
221			if (login_shell)
222			#endif
223	root	1.1	{
224			# ifdef HAVE_STRUCT_UTMP
225			# ifdef HAVE_UPDWTMP
226	root	1.3	updwtmp (WTMP_FILE, ut);
227	root	1.1	# else
228	root	1.3	update_wtmp (WTMP_FILE, ut);
229	root	1.1	# endif
230			# endif
231	root	1.2	# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
232	root	1.3	updwtmpx (WTMPX_FILE, utx);
233	root	1.1	# endif
234			}
235			#endif
236	root	1.3	#if defined(LASTLOG_SUPPORT) && defined(LASTLOG_FILE)
237	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
238			if (login_shell)
239			#endif
240	root	1.3	update_lastlog (LASTLOG_FILE, pty, hostname);
241	root	1.1	#endif
242			}
243
244			/* ------------------------------------------------------------------------- */
245			/*
246			* remove utmp and wtmp entries
247			*/
248			void
249	root	1.3	ptytty_unix::logout ()
250	root	1.1	{
251	root	1.2	if (!cmd_pid)
252			return;
253
254	root	1.1	#ifdef HAVE_STRUCT_UTMP
255	root	1.2	struct utmp tmput, ut = &this->ut;
256	root	1.1	#endif
257			#ifdef HAVE_STRUCT_UTMPX
258			struct utmpx tmputx, utx = &this->utx;
259			#endif
260
261			#ifdef HAVE_STRUCT_UTMP
262			# ifdef HAVE_UTMP_PID
263			memset (ut, 0, sizeof (struct utmp));
264			setutent ();
265	root	1.2	strncpy (ut->ut_id, this->ut_id, sizeof (ut->ut_id));
266	root	1.1	ut->ut_type = USER_PROCESS;
267	root	1.2	if ((tmput = getutid (ut))) /* position to entry in utmp file */
268			ut = tmput;
269	root	1.1	ut->ut_type = DEAD_PROCESS;
270			# else
271			memset (ut->ut_name, 0, sizeof (ut->ut_name));
272			# ifdef HAVE_UTMP_HOST
273			memset (ut->ut_host, 0, sizeof (ut->ut_host));
274			# endif
275			# endif
276			ut->ut_time = time (NULL);
277			#endif
278
279			#ifdef HAVE_STRUCT_UTMPX
280			memset (utx, 0, sizeof (struct utmpx));
281			setutxent ();
282	root	1.2	strncpy (utx->ut_id, this->ut_id, sizeof (utx->ut_id));
283	root	1.1	utx->ut_type = USER_PROCESS;
284			if ((tmputx = getutxid (utx))) /* position to entry in utmp file */
285			utx = tmputx;
286			utx->ut_type = DEAD_PROCESS;
287			# if HAVE_UTMPX_SESSION
288			utx->ut_session = getsid (0);
289			# endif
290			utx->ut_tv.tv_sec = time (NULL);
291			utx->ut_tv.tv_usec = 0;
292			#endif
293
294			/*
295			* Write ending wtmp entry
296			*/
297			#ifdef WTMP_SUPPORT
298	root	1.2	#ifdef LOG_ONLY_ON_LOGIN
299			if (login_shell)
300			#endif
301	root	1.1	{
302			# ifdef HAVE_STRUCT_UTMP
303			# ifdef HAVE_UPDWTMP
304	root	1.3	updwtmp (WTMP_FILE, ut);
305	root	1.1	# else
306	root	1.3	update_wtmp (WTMP_FILE, ut);
307	root	1.1	# endif
308			# endif
309	root	1.2	# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX)
310	root	1.3	updwtmpx (WTMPX_FILE, utx);
311	root	1.1	# endif
312			}
313			#endif
314
315			/*
316			* Write utmp entry
317			*/
318			#ifdef HAVE_STRUCT_UTMP
319			# ifdef HAVE_UTMP_PID
320			if (ut->ut_pid == cmd_pid)
321			pututline (ut);
322			endutent ();
323			# else
324			memset (ut, 0, sizeof (struct utmp));
325	root	1.3	write_bsd_utmp (utmp_pos, ut);
326	root	1.1	# endif
327			#endif
328			#ifdef HAVE_STRUCT_UTMPX
329			if (utx->ut_pid == cmd_pid)
330			pututxline (utx);
331			endutxent ();
332			#endif
333	root	1.2
334			cmd_pid = 0;
335	root	1.1	}
336
337			/* ------------------------------------------------------------------------- */
338			/*
339			* Write a BSD style utmp entry
340			*/
341	root	1.2	#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
342			static int
343	root	1.3	write_bsd_utmp (int utmp_pos, struct utmp *wu)
344	root	1.1	{
345			int fd;
346
347	root	1.3	if (utmp_pos <= 0 \|\| (fd = open (UTMP_FILE, O_WRONLY)) == -1)
348	root	1.1	return 0;
349
350			if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1)
351			write (fd, wu, sizeof (struct utmp));
352			close (fd);
353			return 1;
354			}
355			#endif
356
357			/* ------------------------------------------------------------------------- */
358			/*
359			* Update a BSD style wtmp entry
360			*/
361			#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) && defined(HAVE_STRUCT_UTMP)
362	root	1.2	static void
363	root	1.3	update_wtmp (const char fname, const struct utmp putmp)
364	root	1.1	{
365			int fd, gotlock, retry;
366			struct flock lck; /* fcntl locking scheme */
367			struct stat sbuf;
368
369			if ((fd = open (fname, O_WRONLY \| O_APPEND, 0)) < 0)
370			return;
371
372			lck.l_whence = SEEK_END; /* start lock at current eof */
373			lck.l_len = 0; /* end at ``largest possible eof'' */
374			lck.l_start = 0;
375			lck.l_type = F_WRLCK; /* we want a write lock */
376
377			/* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */
378			for (retry = 10, gotlock = 0; retry--;)
379			if (fcntl (fd, F_SETLK, &lck) != -1)
380			{
381			gotlock = 1;
382			break;
383			}
384			else if (errno != EAGAIN && errno != EACCES)
385			break;
386			if (!gotlock)
387			{ /* give it up */
388			close (fd);
389			return;
390			}
391			if (fstat (fd, &sbuf) == 0)
392			if (write (fd, putmp, sizeof (struct utmp)) != sizeof (struct utmp))
393			ftruncate (fd, sbuf.st_size); /* remove bad writes */
394
395			lck.l_type = F_UNLCK; /* unlocking the file */
396			fcntl (fd, F_SETLK, &lck);
397			close (fd);
398			}
399			#endif
400
401			/* ------------------------------------------------------------------------- */
402			#ifdef LASTLOG_SUPPORT
403	root	1.2	static void
404	root	1.3	update_lastlog (const char fname, const char pty, const char *host)
405	root	1.1	{
406			# ifdef HAVE_STRUCT_LASTLOGX
407			struct lastlogx llx;
408			# endif
409			# ifdef HAVE_STRUCT_LASTLOG
410			int fd;
411			struct lastlog ll;
412			# ifdef LASTLOG_IS_DIR
413			char lastlogfile[256];
414			# endif
415			struct passwd *pwent;
416			# endif
417
418			# ifdef HAVE_STRUCT_LASTLOGX
419			memset (&llx, 0, sizeof (llx));
420			llx.ll_tv.tv_sec = time (NULL);
421			llx.ll_tv.tv_usec = 0;
422			strncpy (llx.ll_line, pty, sizeof (llx.ll_line));
423			strncpy (llx.ll_host, host, sizeof (llx.ll_host));
424	root	1.3	updlastlogx (LASTLOGX_FILE, getuid (), &llx);
425	root	1.1	# endif
426
427			# ifdef HAVE_STRUCT_LASTLOG
428			pwent = getpwuid (getuid ());
429			if (!pwent)
430			{
431	root	1.10	ptytty_warn ("no entry in password file, not updating lastlog.\n", 0);
432	root	1.1	return;
433			}
434
435			memset (&ll, 0, sizeof (ll));
436			ll.ll_time = time (NULL);
437			strncpy (ll.ll_line, pty, sizeof (ll.ll_line));
438			strncpy (ll.ll_host, host, sizeof (ll.ll_host));
439			# ifdef LASTLOG_IS_DIR
440			sprintf (lastlogfile, "%.s/%.s",
441			sizeof (lastlogfile) - sizeof (pwent->pw_name) - 2, fname,
442			sizeof (pwent->pw_name),
443			(!pwent->pw_name \|\| pwent->pw_name[0] == '\0') ? "unknown"
444			: pwent->pw_name);
445			if ((fd = open (lastlogfile, O_WRONLY \| O_CREAT, 0644)) >= 0)
446			{
447			write (fd, &ll, sizeof (ll));
448			close (fd);
449			}
450			# else
451			if ((fd = open (fname, O_RDWR)) != -1)
452			{
453			if (lseek (fd, (off_t) ((long)pwent->pw_uid * sizeof (ll)),
454			SEEK_SET) != -1)
455			write (fd, &ll, sizeof (ll));
456			close (fd);
457			}
458			# endif /* LASTLOG_IS_DIR */
459			# endif /* HAVE_STRUCT_LASTLOG */
460			}
461			#endif /* LASTLOG_SUPPORT */
462
463	root	1.5	#else
464			void
465			ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname)
466			{
467			}
468			#endif
469