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logwtmp

/****************************************************************************
Copyright (c) 1999,2000 WU-FTPD Development Group.
All rights reserved.

Portions Copyright (c) 1980, 1985, 1988, 1989, 1990, 1991, 1993, 1994
The Regents of the University of California.
Portions Copyright (c) 1993, 1994 Washington University in Saint Louis.
Portions Copyright (c) 1996, 1998 Berkeley Software Design, Inc.
Portions Copyright (c) 1989 Massachusetts Institute of Technology.
Portions Copyright (c) 1998 Sendmail, Inc.
Portions Copyright (c) 1983, 1995, 1996, 1997 Eric P. Allman.
Portions Copyright (c) 1997 by Stan Barber.
Portions Copyright (c) 1997 by Kent Landfield.
Portions Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997
Free Software Foundation, Inc.

Use and distribution of this software and its source code are governed
by the terms and conditions of the WU-FTPD Software License ("LICENSE").

If you did not receive a copy of the license, it may be obtained online
at http://www.wu-ftpd.org/license.html.

$Id: logwtmp.c,v 1.16 2000/07/01 18:17:39 wuftpd Exp $

****************************************************************************/
#include "config.h"

#include
#ifdef TIME_WITH_SYS_TIME
#include
#include
#else
#ifdef HAVE_SYS_TIME_H
#include
#else
#include
#endif
#endif
#include
#if defined(HAVE_FCNTL_H)
#include
#endif
#include
#ifdef SVR4
#ifndef NO_UTMPX
#include
#ifndef _SCO_DS
#include
#endif
#endif
#endif
#ifdef BSD
#include
#else
#include
#endif
#ifdef HAVE_SYS_SYSLOG_H
#include
#endif
#if defined(HAVE_SYSLOG_H) || (!defined(AUTOCONF) && !defined(HAVE_SYS_SYSLOG_H))
#include
#endif
#ifdef __FreeBSD__
#include
#include
#include
#endif

#include "pathnames.h"
#include "proto.h"

static int fd = -1;
#ifdef SVR4
static int fdx = -1;
#endif

/* Modified version of logwtmp that holds wtmp file open after first call,
* for use with ftp (which may chroot after login, but before logout). */

void wu_logwtmp(char *line, char *name, char *host, int login)
{
struct stat buf;
struct utmp ut;

#ifdef SVR4
#ifndef NO_UTMPX
/*
* Date: Tue, 09 Mar 1999 14:59:42 -0600
* From: Chad Price
* To: wu-ftpd@wugate.wustl.edu
* Subject: Re: Problem w/ Solaris /var/adm/wtmpx and /usr/bin/last(1)
*
* I've been running Sol 2.4 since it came out, and the 'last' command
* has never worked correctly, for ftpd or logins either one. wtmpx
* often fails to close out sessions when the user logs out. As a
* result, I only use last to see who logged in, not who/when the
* logout occurred.
*
* When I first installed it, it was even worse, and they immediately
* told me to patch the system. This fixed it to semi-compus mentis,
* but not to working order. So I guess my conclusion is: ignore the
* wtmpx / last log stuff on Solaris 2.4 (and other releases of Solaris
* too from what I see in the comments), it's broken and always has
* been. I do of course stand ready to be corrected (in this case,
* pointed to a patch which really does fix it.)
*
*/
struct utmpx utx;

if (fdx < 0 && (fdx = open(WTMPX_FILE, O_WRONLY | O_APPEND, 0)) < 0) {
syslog(LOG_ERR, "wtmpx %s %m", WTMPX_FILE);
return;
}

if (fstat(fdx, &buf) == 0) {
memset((void *) &utx, '\0', sizeof(utx));
(void) strncpy(utx.ut_user, name, sizeof(utx.ut_user));
(void) strncpy(utx.ut_host, host, sizeof(utx.ut_host));
(void) strncpy(utx.ut_id, "ftp", sizeof(utx.ut_id));
(void) strncpy(utx.ut_line, line, sizeof(utx.ut_line));
utx.ut_syslen = strlen(utx.ut_host) + 1;
utx.ut_pid = getpid();
(void) time(&utx.ut_tv.tv_sec);
if (login /* name && *name */ ) {
utx.ut_type = USER_PROCESS;
}
else {
utx.ut_type = DEAD_PROCESS;
}
utx.ut_exit.e_termination = 0;
utx.ut_exit.e_exit = 0;
if (write(fdx, (char *) &utx, sizeof(struct utmpx)) !=
sizeof(struct utmpx))
(void) ftruncate(fdx, buf.st_size);
}
#endif
#endif

#ifdef __FreeBSD__
if (strlen(host) > UT_HOSTSIZE) {
struct hostent *hp = gethostbyname(host);

if (hp != NULL) {
struct in_addr in;

memmove(&in, hp->h_addr, sizeof(in));
host = inet_ntoa(in);
}
else
host = "invalid hostname";
}
#endif

if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY | O_APPEND, 0)) < 0) {
syslog(LOG_ERR, "wtmp %s %m", _PATH_WTMP);
return;
}
if (fstat(fd, &buf) == 0) {
#ifdef UTMAXTYPE
memset((void *) &ut, 0, sizeof(ut));
#ifdef LINUX
(void) strncpy(ut.ut_id, "", sizeof(ut.ut_id));
#else
(void) strncpy(ut.ut_id, "ftp", sizeof(ut.ut_id));
#endif
(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
ut.ut_pid = getpid();
if (login /* name && *name */ ) {
(void) strncpy(ut.ut_user, name, sizeof(ut.ut_user));
ut.ut_type = USER_PROCESS;
}
else
ut.ut_type = DEAD_PROCESS;
#if defined(HAVE_UT_UT_EXIT_E_TERMINATION) || (!defined(AUTOCONF) && !defined(LINUX))
ut.ut_exit.e_termination = 0;
ut.ut_exit.e_exit = 0;
#endif
#else
(void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
if (login) {
(void) strncpy(ut.ut_name, name, sizeof(ut.ut_name));
}
else {
(void) strncpy(ut.ut_name, "", sizeof(ut.ut_name));
}
#endif /* UTMAXTYPE */
#ifdef HAVE_UT_UT_HOST /* does have host in utmp */
if (login) {
(void) strncpy(ut.ut_host, host, sizeof(ut.ut_host));
}
else {
(void) strncpy(ut.ut_host, "", sizeof(ut.ut_host));
}
#endif
(void) time(&ut.ut_time);
if (write(fd, (char *) &ut, sizeof(struct utmp)) !=
sizeof(struct utmp))
(void) ftruncate(fd, buf.st_size);
}
}

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