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root |
1.37 |
// This file is part of libptytty. Do not make local modifications. |
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// http://software.schmorp.de/pkg/libptytty |
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/*----------------------------------------------------------------------* |
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pcg |
1.9 |
* File: logging.C |
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pcg |
1.1 |
*----------------------------------------------------------------------* |
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* |
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* All portions of code are copyright by their respective author/s. |
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* Copyright (c) 1992 John Bovey <jdb@ukc.ac.uk> |
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* - original version |
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* Copyright (c) 1993 lipka |
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* Copyright (c) 1993 Brian Stempien <stempien@cs.wmich.edu> |
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* Copyright (c) 1995 Raul Garcia Garcia <rgg@tid.es> |
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* Copyright (c) 1995 Piet W. Plomp <piet@idefix.icce.rug.nl> |
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* Copyright (c) 1997 Raul Garcia Garcia <rgg@tid.es> |
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* Copyright (c) 1998-2001 Geoff Wing <gcw@pobox.com> |
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* - extensive modifications |
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* Copyright (c) 1999 D J Hawkey Jr <hawkeyd@visi.com> |
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* - lastlog support |
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root |
1.30 |
* Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
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root |
1.40 |
* Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
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pcg |
1.1 |
* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*----------------------------------------------------------------------*/ |
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root |
1.20 |
#include "../config.h" |
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root |
1.36 |
|
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root |
1.41 |
#include "ptytty.h" |
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42 |
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#if UTMP_SUPPORT |
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root |
1.38 |
#include <cstdio> |
45 |
root |
1.47 |
#include <cstring> |
46 |
root |
1.38 |
|
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#include <sys/types.h> |
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#include <sys/stat.h> |
49 |
ayin |
1.45 |
#include <fcntl.h> |
50 |
root |
1.38 |
#include <unistd.h> |
51 |
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#include <time.h> |
52 |
root |
1.46 |
#include <errno.h> |
53 |
root |
1.38 |
|
54 |
pcg |
1.1 |
/* |
55 |
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* BSD style utmp entry |
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* ut_line, ut_name, ut_host, ut_time |
57 |
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* SYSV style utmp (and utmpx) entry |
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* ut_user, ut_id, ut_line, ut_pid, ut_type, ut_exit, ut_time |
59 |
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*/ |
60 |
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61 |
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/* ------------------------------------------------------------------------- */ |
62 |
ayin |
1.42 |
/* |
63 |
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* Write a BSD style utmp entry |
64 |
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*/ |
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#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID) |
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static int |
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write_bsd_utmp (int utmp_pos, struct utmp *wu) |
68 |
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{ |
69 |
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int fd; |
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71 |
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if (utmp_pos <= 0 || (fd = open (UTMP_FILE, O_WRONLY)) == -1) |
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return 0; |
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74 |
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if (lseek (fd, (off_t) (utmp_pos * sizeof (struct utmp)), SEEK_SET) != -1) |
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write (fd, wu, sizeof (struct utmp)); |
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close (fd); |
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return 1; |
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} |
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#endif |
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|
81 |
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/* ------------------------------------------------------------------------- */ |
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/* |
83 |
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* Update a BSD style wtmp entry |
84 |
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*/ |
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#if defined(WTMP_SUPPORT) && !defined(HAVE_UPDWTMP) && defined(HAVE_STRUCT_UTMP) |
86 |
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static void |
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update_wtmp (const char *fname, const struct utmp *putmp) |
88 |
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{ |
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int fd, gotlock, retry; |
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struct flock lck; /* fcntl locking scheme */ |
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struct stat sbuf; |
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if ((fd = open (fname, O_WRONLY | O_APPEND, 0)) < 0) |
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return; |
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96 |
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lck.l_whence = SEEK_END; /* start lock at current eof */ |
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lck.l_len = 0; /* end at ``largest possible eof'' */ |
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lck.l_start = 0; |
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lck.l_type = F_WRLCK; /* we want a write lock */ |
100 |
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101 |
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/* attempt lock with F_SETLK; F_SETLKW would cause a deadlock! */ |
102 |
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for (retry = 10, gotlock = 0; retry--;) |
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if (fcntl (fd, F_SETLK, &lck) != -1) |
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{ |
105 |
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gotlock = 1; |
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break; |
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} |
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else if (errno != EAGAIN && errno != EACCES) |
109 |
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break; |
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if (!gotlock) |
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ayin |
1.44 |
{ |
112 |
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/* give it up */ |
113 |
ayin |
1.42 |
close (fd); |
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return; |
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} |
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if (fstat (fd, &sbuf) == 0) |
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if (write (fd, putmp, sizeof (struct utmp)) != sizeof (struct utmp)) |
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ftruncate (fd, sbuf.st_size); /* remove bad writes */ |
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lck.l_type = F_UNLCK; /* unlocking the file */ |
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fcntl (fd, F_SETLK, &lck); |
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close (fd); |
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} |
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#endif |
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/* ------------------------------------------------------------------------- */ |
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#ifdef LASTLOG_SUPPORT |
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static void |
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update_lastlog (const char *fname, const char *pty, const char *host) |
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{ |
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# if defined(HAVE_STRUCT_LASTLOGX) && defined(HAVE_UPDLASTLOGX) |
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struct lastlogx llx; |
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# endif |
134 |
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# ifdef HAVE_STRUCT_LASTLOG |
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int fd; |
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struct lastlog ll; |
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char lastlogfile[256]; |
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struct passwd *pwent; |
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struct stat st; |
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# endif |
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# if defined(HAVE_STRUCT_LASTLOGX) && defined(HAVE_UPDLASTLOGX) |
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memset (&llx, 0, sizeof (llx)); |
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llx.ll_tv.tv_sec = time (NULL); |
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llx.ll_tv.tv_usec = 0; |
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strncpy (llx.ll_line, pty, sizeof (llx.ll_line)); |
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strncpy (llx.ll_host, host, sizeof (llx.ll_host)); |
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updlastlogx (LASTLOGX_FILE, getuid (), &llx); |
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# endif |
150 |
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# ifdef HAVE_STRUCT_LASTLOG |
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pwent = getpwuid (getuid ()); |
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if (!pwent) |
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{ |
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ptytty_warn ("no entry in password file, not updating lastlog.\n", 0); |
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return; |
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} |
158 |
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memset (&ll, 0, sizeof (ll)); |
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ll.ll_time = time (NULL); |
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strncpy (ll.ll_line, pty, sizeof (ll.ll_line)); |
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strncpy (ll.ll_host, host, sizeof (ll.ll_host)); |
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if (stat (fname, &st) != 0) |
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return; |
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if (S_ISDIR (st.st_mode)) |
166 |
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{ |
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sprintf (lastlogfile, "%.*s/%.*s", |
168 |
ayin |
1.43 |
(int)(sizeof (lastlogfile) - sizeof (pwent->pw_name) - 2), fname, |
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(int)sizeof (pwent->pw_name), |
170 |
ayin |
1.42 |
(!pwent->pw_name || pwent->pw_name[0] == '\0') ? "unknown" |
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: pwent->pw_name); |
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if ((fd = open (lastlogfile, O_WRONLY | O_CREAT, 0644)) >= 0) |
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{ |
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write (fd, &ll, sizeof (ll)); |
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close (fd); |
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} |
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} |
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else if (S_ISREG (st.st_mode)) |
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if ((fd = open (fname, O_RDWR)) != -1) |
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{ |
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if (lseek (fd, (off_t) ((long)pwent->pw_uid * sizeof (ll)), |
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SEEK_SET) != -1) |
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write (fd, &ll, sizeof (ll)); |
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close (fd); |
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} |
186 |
ayin |
1.43 |
# endif /* HAVE_STRUCT_LASTLOG */ |
187 |
ayin |
1.42 |
} |
188 |
ayin |
1.43 |
#endif /* LASTLOG_SUPPORT */ |
189 |
ayin |
1.42 |
|
190 |
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/* ------------------------------------------------------------------------- */ |
191 |
pcg |
1.1 |
|
192 |
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/* |
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* make and write utmp and wtmp entries |
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*/ |
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void |
196 |
root |
1.36 |
ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname) |
197 |
pcg |
1.1 |
{ |
198 |
root |
1.28 |
const char *pty = name; |
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200 |
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if (!pty || !*pty) |
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return; |
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root |
1.25 |
this->cmd_pid = cmd_pid; |
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this->login_shell = login_shell; |
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206 |
pcg |
1.1 |
#ifdef HAVE_STRUCT_UTMP |
207 |
root |
1.12 |
struct utmp *ut = &this->ut; |
208 |
pcg |
1.1 |
#endif |
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#ifdef HAVE_STRUCT_UTMPX |
210 |
root |
1.12 |
struct utmpx *utx = &this->utx; |
211 |
pcg |
1.1 |
#endif |
212 |
root |
1.12 |
int i; |
213 |
root |
1.17 |
struct passwd *pwent = getpwuid (getuid ()); |
214 |
ayin |
1.43 |
const char *name = (pwent && pwent->pw_name) ? pwent->pw_name : "?"; |
215 |
pcg |
1.1 |
|
216 |
root |
1.11 |
if (!strncmp (pty, "/dev/", 5)) |
217 |
pcg |
1.6 |
pty += 5; /* skip /dev/ prefix */ |
218 |
pcg |
1.1 |
|
219 |
root |
1.22 |
#if defined(HAVE_UTMP_PID) || defined(HAVE_STRUCT_UTMPX) |
220 |
root |
1.11 |
if (!strncmp (pty, "pty", 3) || !strncmp (pty, "tty", 3)) |
221 |
root |
1.13 |
strncpy (ut_id, pty + 3, sizeof (ut_id)); |
222 |
pcg |
1.7 |
else if (sscanf (pty, "pts/%d", &i) == 1) |
223 |
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sprintf (ut_id, "vt%02x", (i & 0xff)); /* sysv naming */ |
224 |
ayin |
1.44 |
else |
225 |
pcg |
1.6 |
{ |
226 |
root |
1.38 |
ptytty_warn ("can't parse tty name \"%s\", not adding utmp entry.\n", pty); |
227 |
pcg |
1.6 |
return; |
228 |
pcg |
1.1 |
} |
229 |
root |
1.13 |
#endif |
230 |
pcg |
1.1 |
|
231 |
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#ifdef HAVE_STRUCT_UTMP |
232 |
root |
1.11 |
memset (ut, 0, sizeof (struct utmp)); |
233 |
pcg |
1.1 |
# ifdef HAVE_UTMP_PID |
234 |
pcg |
1.7 |
setutent (); |
235 |
root |
1.11 |
strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id)); |
236 |
pcg |
1.6 |
ut->ut_type = DEAD_PROCESS; |
237 |
pcg |
1.7 |
getutid (ut); /* position to entry in utmp file */ |
238 |
pcg |
1.1 |
# endif |
239 |
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#endif |
240 |
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241 |
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#ifdef HAVE_STRUCT_UTMPX |
242 |
root |
1.11 |
memset (utx, 0, sizeof (struct utmpx)); |
243 |
pcg |
1.7 |
setutxent (); |
244 |
root |
1.11 |
strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id)); |
245 |
pcg |
1.6 |
utx->ut_type = DEAD_PROCESS; |
246 |
pcg |
1.7 |
getutxid (utx); /* position to entry in utmp file */ |
247 |
pcg |
1.1 |
#endif |
248 |
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|
249 |
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#ifdef HAVE_STRUCT_UTMP |
250 |
root |
1.11 |
strncpy (ut->ut_line, pty, sizeof (ut->ut_line)); |
251 |
ayin |
1.44 |
# ifdef HAVE_UTMP_HOST |
252 |
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strncpy (ut->ut_host, hostname, sizeof (ut->ut_host)); |
253 |
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# endif |
254 |
pcg |
1.7 |
ut->ut_time = time (NULL); |
255 |
pcg |
1.1 |
# ifdef HAVE_UTMP_PID |
256 |
ayin |
1.43 |
strncpy (ut->ut_user, name, sizeof (ut->ut_user)); |
257 |
root |
1.11 |
strncpy (ut->ut_id, ut_id, sizeof (ut->ut_id)); |
258 |
pcg |
1.6 |
ut->ut_pid = cmd_pid; |
259 |
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ut->ut_type = USER_PROCESS; |
260 |
pcg |
1.7 |
pututline (ut); |
261 |
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endutent (); /* close the file */ |
262 |
pcg |
1.6 |
utmp_pos = 0; |
263 |
pcg |
1.1 |
# else |
264 |
ayin |
1.43 |
strncpy (ut->ut_name, name, sizeof (ut->ut_name)); |
265 |
pcg |
1.1 |
# endif |
266 |
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#endif |
267 |
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|
268 |
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#ifdef HAVE_STRUCT_UTMPX |
269 |
root |
1.11 |
strncpy (utx->ut_line, pty, sizeof (utx->ut_line)); |
270 |
ayin |
1.43 |
strncpy (utx->ut_user, name, sizeof (utx->ut_user)); |
271 |
root |
1.11 |
strncpy (utx->ut_id, ut_id, sizeof (utx->ut_id)); |
272 |
root |
1.15 |
# if HAVE_UTMPX_SESSION |
273 |
pcg |
1.7 |
utx->ut_session = getsid (0); |
274 |
root |
1.15 |
# endif |
275 |
pcg |
1.7 |
utx->ut_tv.tv_sec = time (NULL); |
276 |
pcg |
1.6 |
utx->ut_tv.tv_usec = 0; |
277 |
|
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utx->ut_pid = cmd_pid; |
278 |
pcg |
1.1 |
# ifdef HAVE_UTMPX_HOST |
279 |
root |
1.11 |
strncpy (utx->ut_host, hostname, sizeof (utx->ut_host)); |
280 |
pcg |
1.1 |
# if 0 |
281 |
pcg |
1.6 |
{ |
282 |
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char *colon; |
283 |
pcg |
1.1 |
|
284 |
root |
1.11 |
if ((colon = strrchr (ut->ut_host, ':')) != NULL) |
285 |
pcg |
1.6 |
*colon = '\0'; |
286 |
|
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} |
287 |
pcg |
1.1 |
# endif |
288 |
|
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# endif |
289 |
pcg |
1.6 |
utx->ut_type = USER_PROCESS; |
290 |
pcg |
1.7 |
pututxline (utx); |
291 |
|
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endutxent (); /* close the file */ |
292 |
pcg |
1.6 |
utmp_pos = 0; |
293 |
pcg |
1.1 |
#endif |
294 |
|
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|
295 |
|
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#if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID) |
296 |
pcg |
1.6 |
{ |
297 |
ayin |
1.42 |
# if 1 |
298 |
root |
1.31 |
int fdstdin = dup (STDIN_FILENO); |
299 |
root |
1.33 |
dup2 (tty, STDIN_FILENO); |
300 |
root |
1.31 |
|
301 |
pcg |
1.7 |
i = ttyslot (); |
302 |
root |
1.36 |
if (write_bsd_utmp (i, ut)) |
303 |
pcg |
1.6 |
utmp_pos = i; |
304 |
root |
1.31 |
|
305 |
|
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dup2 (fdstdin, STDIN_FILENO); |
306 |
|
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close (fdstdin); |
307 |
pcg |
1.6 |
# endif |
308 |
|
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} |
309 |
pcg |
1.1 |
#endif |
310 |
|
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|
311 |
|
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#ifdef WTMP_SUPPORT |
312 |
ayin |
1.34 |
#ifdef LOG_ONLY_ON_LOGIN |
313 |
root |
1.25 |
if (login_shell) |
314 |
ayin |
1.34 |
#endif |
315 |
pcg |
1.1 |
{ |
316 |
|
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# ifdef HAVE_STRUCT_UTMP |
317 |
|
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# ifdef HAVE_UPDWTMP |
318 |
root |
1.36 |
updwtmp (WTMP_FILE, ut); |
319 |
pcg |
1.1 |
# else |
320 |
root |
1.36 |
update_wtmp (WTMP_FILE, ut); |
321 |
pcg |
1.1 |
# endif |
322 |
|
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# endif |
323 |
root |
1.23 |
# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX) |
324 |
root |
1.36 |
updwtmpx (WTMPX_FILE, utx); |
325 |
pcg |
1.1 |
# endif |
326 |
|
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} |
327 |
|
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#endif |
328 |
root |
1.36 |
#if defined(LASTLOG_SUPPORT) && defined(LASTLOG_FILE) |
329 |
ayin |
1.34 |
#ifdef LOG_ONLY_ON_LOGIN |
330 |
root |
1.25 |
if (login_shell) |
331 |
ayin |
1.34 |
#endif |
332 |
root |
1.36 |
update_lastlog (LASTLOG_FILE, pty, hostname); |
333 |
pcg |
1.1 |
#endif |
334 |
|
|
} |
335 |
|
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|
336 |
|
|
/* ------------------------------------------------------------------------- */ |
337 |
|
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/* |
338 |
|
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* remove utmp and wtmp entries |
339 |
|
|
*/ |
340 |
|
|
void |
341 |
root |
1.36 |
ptytty_unix::logout () |
342 |
pcg |
1.1 |
{ |
343 |
root |
1.28 |
if (!cmd_pid) |
344 |
|
|
return; |
345 |
|
|
|
346 |
pcg |
1.1 |
#ifdef HAVE_STRUCT_UTMP |
347 |
ayin |
1.26 |
struct utmp *tmput, *ut = &this->ut; |
348 |
pcg |
1.1 |
#endif |
349 |
|
|
#ifdef HAVE_STRUCT_UTMPX |
350 |
root |
1.12 |
struct utmpx *tmputx, *utx = &this->utx; |
351 |
pcg |
1.1 |
#endif |
352 |
|
|
|
353 |
|
|
#ifdef HAVE_STRUCT_UTMP |
354 |
|
|
# ifdef HAVE_UTMP_PID |
355 |
root |
1.11 |
memset (ut, 0, sizeof (struct utmp)); |
356 |
pcg |
1.7 |
setutent (); |
357 |
root |
1.21 |
strncpy (ut->ut_id, this->ut_id, sizeof (ut->ut_id)); |
358 |
pcg |
1.6 |
ut->ut_type = USER_PROCESS; |
359 |
ayin |
1.26 |
if ((tmput = getutid (ut))) /* position to entry in utmp file */ |
360 |
|
|
ut = tmput; |
361 |
pcg |
1.6 |
ut->ut_type = DEAD_PROCESS; |
362 |
|
|
# else |
363 |
root |
1.11 |
memset (ut->ut_name, 0, sizeof (ut->ut_name)); |
364 |
pcg |
1.1 |
# ifdef HAVE_UTMP_HOST |
365 |
root |
1.11 |
memset (ut->ut_host, 0, sizeof (ut->ut_host)); |
366 |
pcg |
1.1 |
# endif |
367 |
|
|
# endif |
368 |
pcg |
1.7 |
ut->ut_time = time (NULL); |
369 |
pcg |
1.1 |
#endif |
370 |
|
|
|
371 |
|
|
#ifdef HAVE_STRUCT_UTMPX |
372 |
root |
1.11 |
memset (utx, 0, sizeof (struct utmpx)); |
373 |
pcg |
1.7 |
setutxent (); |
374 |
root |
1.21 |
strncpy (utx->ut_id, this->ut_id, sizeof (utx->ut_id)); |
375 |
pcg |
1.6 |
utx->ut_type = USER_PROCESS; |
376 |
pcg |
1.7 |
if ((tmputx = getutxid (utx))) /* position to entry in utmp file */ |
377 |
pcg |
1.6 |
utx = tmputx; |
378 |
|
|
utx->ut_type = DEAD_PROCESS; |
379 |
root |
1.15 |
# if HAVE_UTMPX_SESSION |
380 |
pcg |
1.7 |
utx->ut_session = getsid (0); |
381 |
root |
1.15 |
# endif |
382 |
pcg |
1.7 |
utx->ut_tv.tv_sec = time (NULL); |
383 |
pcg |
1.6 |
utx->ut_tv.tv_usec = 0; |
384 |
pcg |
1.1 |
#endif |
385 |
|
|
|
386 |
pcg |
1.6 |
/* |
387 |
|
|
* Write ending wtmp entry |
388 |
|
|
*/ |
389 |
pcg |
1.1 |
#ifdef WTMP_SUPPORT |
390 |
ayin |
1.34 |
#ifdef LOG_ONLY_ON_LOGIN |
391 |
root |
1.25 |
if (login_shell) |
392 |
ayin |
1.34 |
#endif |
393 |
pcg |
1.1 |
{ |
394 |
|
|
# ifdef HAVE_STRUCT_UTMP |
395 |
|
|
# ifdef HAVE_UPDWTMP |
396 |
root |
1.36 |
updwtmp (WTMP_FILE, ut); |
397 |
pcg |
1.1 |
# else |
398 |
root |
1.36 |
update_wtmp (WTMP_FILE, ut); |
399 |
pcg |
1.1 |
# endif |
400 |
|
|
# endif |
401 |
root |
1.24 |
# if defined(HAVE_STRUCT_UTMPX) && defined(HAVE_UPDWTMPX) |
402 |
root |
1.36 |
updwtmpx (WTMPX_FILE, utx); |
403 |
pcg |
1.1 |
# endif |
404 |
|
|
} |
405 |
|
|
#endif |
406 |
|
|
|
407 |
pcg |
1.6 |
/* |
408 |
|
|
* Write utmp entry |
409 |
|
|
*/ |
410 |
pcg |
1.1 |
#ifdef HAVE_STRUCT_UTMP |
411 |
|
|
# ifdef HAVE_UTMP_PID |
412 |
pcg |
1.6 |
if (ut->ut_pid == cmd_pid) |
413 |
pcg |
1.7 |
pututline (ut); |
414 |
|
|
endutent (); |
415 |
pcg |
1.1 |
# else |
416 |
root |
1.11 |
memset (ut, 0, sizeof (struct utmp)); |
417 |
root |
1.36 |
write_bsd_utmp (utmp_pos, ut); |
418 |
pcg |
1.1 |
# endif |
419 |
|
|
#endif |
420 |
|
|
#ifdef HAVE_STRUCT_UTMPX |
421 |
pcg |
1.6 |
if (utx->ut_pid == cmd_pid) |
422 |
pcg |
1.7 |
pututxline (utx); |
423 |
|
|
endutxent (); |
424 |
pcg |
1.1 |
#endif |
425 |
root |
1.28 |
|
426 |
|
|
cmd_pid = 0; |
427 |
pcg |
1.1 |
} |
428 |
|
|
|
429 |
root |
1.35 |
#else |
430 |
|
|
void |
431 |
root |
1.36 |
ptytty_unix::login (int cmd_pid, bool login_shell, const char *hostname) |
432 |
root |
1.35 |
{ |
433 |
|
|
} |
434 |
root |
1.36 |
#endif |
435 |
|
|
|