loginrec.c revision 207319
198937Sdes/* 298937Sdes * Copyright (c) 2000 Andre Lucas. All rights reserved. 398937Sdes * Portions copyright (c) 1998 Todd C. Miller 498937Sdes * Portions copyright (c) 1996 Jason Downs 598937Sdes * Portions copyright (c) 1996 Theo de Raadt 698937Sdes * 798937Sdes * Redistribution and use in source and binary forms, with or without 898937Sdes * modification, are permitted provided that the following conditions 998937Sdes * are met: 1098937Sdes * 1. Redistributions of source code must retain the above copyright 1198937Sdes * notice, this list of conditions and the following disclaimer. 1298937Sdes * 2. Redistributions in binary form must reproduce the above copyright 1398937Sdes * notice, this list of conditions and the following disclaimer in the 1498937Sdes * documentation and/or other materials provided with the distribution. 1598937Sdes * 1698937Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1798937Sdes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1898937Sdes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1998937Sdes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2098937Sdes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2198937Sdes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2298937Sdes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2398937Sdes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2498937Sdes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2598937Sdes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2698937Sdes */ 2798937Sdes 28147005Sdes/* 29147005Sdes * The btmp logging code is derived from login.c from util-linux and is under 30147005Sdes * the the following license: 31147005Sdes * 32147005Sdes * Copyright (c) 1980, 1987, 1988 The Regents of the University of California. 33147005Sdes * All rights reserved. 34147005Sdes * 35147005Sdes * Redistribution and use in source and binary forms are permitted 36147005Sdes * provided that the above copyright notice and this paragraph are 37147005Sdes * duplicated in all such forms and that any documentation, 38147005Sdes * advertising materials, and other materials related to such 39147005Sdes * distribution and use acknowledge that the software was developed 40147005Sdes * by the University of California, Berkeley. The name of the 41147005Sdes * University may not be used to endorse or promote products derived 42147005Sdes * from this software without specific prior written permission. 43147005Sdes * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 44147005Sdes * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 45147005Sdes * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 46147005Sdes */ 47147005Sdes 48147005Sdes 4998937Sdes/** 5098937Sdes ** loginrec.c: platform-independent login recording and lastlog retrieval 5198937Sdes **/ 5298937Sdes 5398937Sdes/* 54147005Sdes * The new login code explained 55147005Sdes * ============================ 56147005Sdes * 57147005Sdes * This code attempts to provide a common interface to login recording 58147005Sdes * (utmp and friends) and last login time retrieval. 59147005Sdes * 60147005Sdes * Its primary means of achieving this is to use 'struct logininfo', a 61147005Sdes * union of all the useful fields in the various different types of 62147005Sdes * system login record structures one finds on UNIX variants. 63147005Sdes * 64147005Sdes * We depend on autoconf to define which recording methods are to be 65147005Sdes * used, and which fields are contained in the relevant data structures 66147005Sdes * on the local system. Many C preprocessor symbols affect which code 67147005Sdes * gets compiled here. 68147005Sdes * 69147005Sdes * The code is designed to make it easy to modify a particular 70147005Sdes * recording method, without affecting other methods nor requiring so 71147005Sdes * many nested conditional compilation blocks as were commonplace in 72147005Sdes * the old code. 73147005Sdes * 74147005Sdes * For login recording, we try to use the local system's libraries as 75147005Sdes * these are clearly most likely to work correctly. For utmp systems 76147005Sdes * this usually means login() and logout() or setutent() etc., probably 77147005Sdes * in libutil, along with logwtmp() etc. On these systems, we fall back 78147005Sdes * to writing the files directly if we have to, though this method 79147005Sdes * requires very thorough testing so we do not corrupt local auditing 80147005Sdes * information. These files and their access methods are very system 81147005Sdes * specific indeed. 82147005Sdes * 83147005Sdes * For utmpx systems, the corresponding library functions are 84147005Sdes * setutxent() etc. To the author's knowledge, all utmpx systems have 85147005Sdes * these library functions and so no direct write is attempted. If such 86147005Sdes * a system exists and needs support, direct analogues of the [uw]tmp 87147005Sdes * code should suffice. 88147005Sdes * 89147005Sdes * Retrieving the time of last login ('lastlog') is in some ways even 90147005Sdes * more problemmatic than login recording. Some systems provide a 91147005Sdes * simple table of all users which we seek based on uid and retrieve a 92147005Sdes * relatively standard structure. Others record the same information in 93147005Sdes * a directory with a separate file, and others don't record the 94147005Sdes * information separately at all. For systems in the latter category, 95147005Sdes * we look backwards in the wtmp or wtmpx file for the last login entry 96147005Sdes * for our user. Naturally this is slower and on busy systems could 97147005Sdes * incur a significant performance penalty. 98147005Sdes * 99147005Sdes * Calling the new code 100147005Sdes * -------------------- 101147005Sdes * 102147005Sdes * In OpenSSH all login recording and retrieval is performed in 103147005Sdes * login.c. Here you'll find working examples. Also, in the logintest.c 104147005Sdes * program there are more examples. 105147005Sdes * 106147005Sdes * Internal handler calling method 107147005Sdes * ------------------------------- 108147005Sdes * 109147005Sdes * When a call is made to login_login() or login_logout(), both 110147005Sdes * routines set a struct logininfo flag defining which action (log in, 111147005Sdes * or log out) is to be taken. They both then call login_write(), which 112147005Sdes * calls whichever of the many structure-specific handlers autoconf 113147005Sdes * selects for the local system. 114147005Sdes * 115147005Sdes * The handlers themselves handle system data structure specifics. Both 116147005Sdes * struct utmp and struct utmpx have utility functions (see 117147005Sdes * construct_utmp*()) to try to make it simpler to add extra systems 118147005Sdes * that introduce new features to either structure. 119147005Sdes * 120147005Sdes * While it may seem terribly wasteful to replicate so much similar 121147005Sdes * code for each method, experience has shown that maintaining code to 122147005Sdes * write both struct utmp and utmpx in one function, whilst maintaining 123147005Sdes * support for all systems whether they have library support or not, is 124147005Sdes * a difficult and time-consuming task. 125147005Sdes * 126147005Sdes * Lastlog support proceeds similarly. Functions login_get_lastlog() 127147005Sdes * (and its OpenSSH-tuned friend login_get_lastlog_time()) call 128147005Sdes * getlast_entry(), which tries one of three methods to find the last 129147005Sdes * login time. It uses local system lastlog support if it can, 130147005Sdes * otherwise it tries wtmp or wtmpx before giving up and returning 0, 131147005Sdes * meaning "tilt". 132147005Sdes * 133147005Sdes * Maintenance 134147005Sdes * ----------- 135147005Sdes * 136147005Sdes * In many cases it's possible to tweak autoconf to select the correct 137147005Sdes * methods for a particular platform, either by improving the detection 138147005Sdes * code (best), or by presetting DISABLE_<method> or CONF_<method>_FILE 139147005Sdes * symbols for the platform. 140147005Sdes * 141147005Sdes * Use logintest to check which symbols are defined before modifying 142147005Sdes * configure.ac and loginrec.c. (You have to build logintest yourself 143147005Sdes * with 'make logintest' as it's not built by default.) 144147005Sdes * 145147005Sdes * Otherwise, patches to the specific method(s) are very helpful! 146147005Sdes */ 14798937Sdes 14898937Sdes#include "includes.h" 149202231Sed__RCSID("$FreeBSD: head/crypto/openssh/loginrec.c 207319 2010-04-28 10:36:33Z des $"); 15098937Sdes 151162856Sdes#include <sys/types.h> 152162856Sdes#include <sys/stat.h> 153162856Sdes#include <sys/socket.h> 154162856Sdes 155162856Sdes#include <netinet/in.h> 156162856Sdes 157162856Sdes#include <errno.h> 158162856Sdes#include <fcntl.h> 159162856Sdes#ifdef HAVE_PATHS_H 160162856Sdes# include <paths.h> 161162856Sdes#endif 162162856Sdes#include <pwd.h> 163162856Sdes#include <stdarg.h> 164162856Sdes#include <string.h> 165181111Sdes#include <time.h> 166162856Sdes#include <unistd.h> 167162856Sdes 168162856Sdes#include "xmalloc.h" 169162856Sdes#include "key.h" 170162856Sdes#include "hostfile.h" 17198937Sdes#include "ssh.h" 17298937Sdes#include "loginrec.h" 17398937Sdes#include "log.h" 17498937Sdes#include "atomicio.h" 175147005Sdes#include "packet.h" 176147005Sdes#include "canohost.h" 177147005Sdes#include "auth.h" 178147005Sdes#include "buffer.h" 17998937Sdes 18098937Sdes#ifdef HAVE_UTIL_H 181147005Sdes# include <util.h> 18298937Sdes#endif 18398937Sdes 18498937Sdes#ifdef HAVE_LIBUTIL_H 185147005Sdes# include <libutil.h> 18698937Sdes#endif 18798937Sdes 18898937Sdes/** 18998937Sdes ** prototypes for helper functions in this file 19098937Sdes **/ 19198937Sdes 19298937Sdes#if HAVE_UTMP_H 19398937Sdesvoid set_utmp_time(struct logininfo *li, struct utmp *ut); 19498937Sdesvoid construct_utmp(struct logininfo *li, struct utmp *ut); 19598937Sdes#endif 19698937Sdes 19798937Sdes#ifdef HAVE_UTMPX_H 19898937Sdesvoid set_utmpx_time(struct logininfo *li, struct utmpx *ut); 19998937Sdesvoid construct_utmpx(struct logininfo *li, struct utmpx *ut); 20098937Sdes#endif 20198937Sdes 20298937Sdesint utmp_write_entry(struct logininfo *li); 20398937Sdesint utmpx_write_entry(struct logininfo *li); 20498937Sdesint wtmp_write_entry(struct logininfo *li); 20598937Sdesint wtmpx_write_entry(struct logininfo *li); 20698937Sdesint lastlog_write_entry(struct logininfo *li); 20798937Sdesint syslogin_write_entry(struct logininfo *li); 20898937Sdes 20998937Sdesint getlast_entry(struct logininfo *li); 21098937Sdesint lastlog_get_entry(struct logininfo *li); 211202213Sedint utmpx_get_entry(struct logininfo *li); 21298937Sdesint wtmp_get_entry(struct logininfo *li); 21398937Sdesint wtmpx_get_entry(struct logininfo *li); 21498937Sdes 215147005Sdesextern Buffer loginmsg; 216147005Sdes 21798937Sdes/* pick the shortest string */ 218147005Sdes#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) 21998937Sdes 22098937Sdes/** 22198937Sdes ** platform-independent login functions 22298937Sdes **/ 22398937Sdes 224147005Sdes/* 225147005Sdes * login_login(struct logininfo *) - Record a login 22698937Sdes * 22798937Sdes * Call with a pointer to a struct logininfo initialised with 22898937Sdes * login_init_entry() or login_alloc_entry() 22998937Sdes * 23098937Sdes * Returns: 23198937Sdes * >0 if successful 23298937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 23398937Sdes */ 23498937Sdesint 235147005Sdeslogin_login(struct logininfo *li) 23698937Sdes{ 23798937Sdes li->type = LTYPE_LOGIN; 238147005Sdes return (login_write(li)); 23998937Sdes} 24098937Sdes 24198937Sdes 242147005Sdes/* 243147005Sdes * login_logout(struct logininfo *) - Record a logout 24498937Sdes * 24598937Sdes * Call as with login_login() 24698937Sdes * 24798937Sdes * Returns: 24898937Sdes * >0 if successful 24998937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 25098937Sdes */ 25198937Sdesint 25298937Sdeslogin_logout(struct logininfo *li) 25398937Sdes{ 25498937Sdes li->type = LTYPE_LOGOUT; 255147005Sdes return (login_write(li)); 25698937Sdes} 25798937Sdes 258147005Sdes/* 259147005Sdes * login_get_lastlog_time(int) - Retrieve the last login time 26098937Sdes * 26198937Sdes * Retrieve the last login time for the given uid. Will try to use the 26298937Sdes * system lastlog facilities if they are available, but will fall back 26398937Sdes * to looking in wtmp/wtmpx if necessary 26498937Sdes * 26598937Sdes * Returns: 26698937Sdes * 0 on failure, or if user has never logged in 26798937Sdes * Time in seconds from the epoch if successful 26898937Sdes * 26998937Sdes * Useful preprocessor symbols: 27098937Sdes * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog 27198937Sdes * info 27298937Sdes * USE_LASTLOG: If set, indicates the presence of system lastlog 27398937Sdes * facilities. If this and DISABLE_LASTLOG are not set, 27498937Sdes * try to retrieve lastlog information from wtmp/wtmpx. 27598937Sdes */ 27698937Sdesunsigned int 27798937Sdeslogin_get_lastlog_time(const int uid) 27898937Sdes{ 27998937Sdes struct logininfo li; 28098937Sdes 28198937Sdes if (login_get_lastlog(&li, uid)) 282147005Sdes return (li.tv_sec); 28398937Sdes else 284147005Sdes return (0); 28598937Sdes} 28698937Sdes 287147005Sdes/* 288147005Sdes * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry 28998937Sdes * 29098937Sdes * Retrieve a logininfo structure populated (only partially) with 29198937Sdes * information from the system lastlog data, or from wtmp/wtmpx if no 29298937Sdes * system lastlog information exists. 29398937Sdes * 29498937Sdes * Note this routine must be given a pre-allocated logininfo. 29598937Sdes * 29698937Sdes * Returns: 29798937Sdes * >0: A pointer to your struct logininfo if successful 29898937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 29998937Sdes */ 30098937Sdesstruct logininfo * 30198937Sdeslogin_get_lastlog(struct logininfo *li, const int uid) 30298937Sdes{ 30398937Sdes struct passwd *pw; 30498937Sdes 30598937Sdes memset(li, '\0', sizeof(*li)); 30698937Sdes li->uid = uid; 30798937Sdes 30898937Sdes /* 30998937Sdes * If we don't have a 'real' lastlog, we need the username to 31098937Sdes * reliably search wtmp(x) for the last login (see 31198937Sdes * wtmp_get_entry().) 31298937Sdes */ 31398937Sdes pw = getpwuid(uid); 31498937Sdes if (pw == NULL) 315147005Sdes fatal("%s: Cannot find account for uid %i", __func__, uid); 31698937Sdes 31798937Sdes /* No MIN_SIZEOF here - we absolutely *must not* truncate the 318147005Sdes * username (XXX - so check for trunc!) */ 31998937Sdes strlcpy(li->username, pw->pw_name, sizeof(li->username)); 32098937Sdes 32198937Sdes if (getlast_entry(li)) 322147005Sdes return (li); 32398937Sdes else 324147005Sdes return (NULL); 32598937Sdes} 32698937Sdes 32798937Sdes 328147005Sdes/* 329147005Sdes * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise 33098937Sdes * a logininfo structure 33198937Sdes * 33298937Sdes * This function creates a new struct logininfo, a data structure 33398937Sdes * meant to carry the information required to portably record login info. 33498937Sdes * 33598937Sdes * Returns a pointer to a newly created struct logininfo. If memory 33698937Sdes * allocation fails, the program halts. 33798937Sdes */ 33898937Sdesstruct 33998937Sdeslogininfo *login_alloc_entry(int pid, const char *username, 340147005Sdes const char *hostname, const char *line) 34198937Sdes{ 34298937Sdes struct logininfo *newli; 34398937Sdes 344147005Sdes newli = xmalloc(sizeof(*newli)); 345147005Sdes login_init_entry(newli, pid, username, hostname, line); 346147005Sdes return (newli); 34798937Sdes} 34898937Sdes 34998937Sdes 35098937Sdes/* login_free_entry(struct logininfo *) - free struct memory */ 35198937Sdesvoid 35298937Sdeslogin_free_entry(struct logininfo *li) 35398937Sdes{ 35498937Sdes xfree(li); 35598937Sdes} 35698937Sdes 35798937Sdes 35898937Sdes/* login_init_entry(struct logininfo *, int, char*, char*, char*) 35998937Sdes * - initialise a struct logininfo 36098937Sdes * 36198937Sdes * Populates a new struct logininfo, a data structure meant to carry 36298937Sdes * the information required to portably record login info. 36398937Sdes * 36498937Sdes * Returns: 1 36598937Sdes */ 36698937Sdesint 36798937Sdeslogin_init_entry(struct logininfo *li, int pid, const char *username, 368147005Sdes const char *hostname, const char *line) 36998937Sdes{ 37098937Sdes struct passwd *pw; 37198937Sdes 37298937Sdes memset(li, 0, sizeof(*li)); 37398937Sdes 37498937Sdes li->pid = pid; 37598937Sdes 37698937Sdes /* set the line information */ 37798937Sdes if (line) 37898937Sdes line_fullname(li->line, line, sizeof(li->line)); 37998937Sdes 38098937Sdes if (username) { 38198937Sdes strlcpy(li->username, username, sizeof(li->username)); 38298937Sdes pw = getpwnam(li->username); 383147005Sdes if (pw == NULL) { 384149753Sdes fatal("%s: Cannot find user \"%s\"", __func__, 385147005Sdes li->username); 386147005Sdes } 38798937Sdes li->uid = pw->pw_uid; 38898937Sdes } 38998937Sdes 39098937Sdes if (hostname) 39198937Sdes strlcpy(li->hostname, hostname, sizeof(li->hostname)); 39298937Sdes 393147005Sdes return (1); 39498937Sdes} 39598937Sdes 396149753Sdes/* 397147005Sdes * login_set_current_time(struct logininfo *) - set the current time 39898937Sdes * 39998937Sdes * Set the current time in a logininfo structure. This function is 40098937Sdes * meant to eliminate the need to deal with system dependencies for 40198937Sdes * time handling. 40298937Sdes */ 40398937Sdesvoid 40498937Sdeslogin_set_current_time(struct logininfo *li) 40598937Sdes{ 40698937Sdes struct timeval tv; 40798937Sdes 40898937Sdes gettimeofday(&tv, NULL); 40998937Sdes 41098937Sdes li->tv_sec = tv.tv_sec; 41198937Sdes li->tv_usec = tv.tv_usec; 41298937Sdes} 41398937Sdes 41498937Sdes/* copy a sockaddr_* into our logininfo */ 41598937Sdesvoid 41698937Sdeslogin_set_addr(struct logininfo *li, const struct sockaddr *sa, 417147005Sdes const unsigned int sa_size) 41898937Sdes{ 41998937Sdes unsigned int bufsize = sa_size; 42098937Sdes 42198937Sdes /* make sure we don't overrun our union */ 42298937Sdes if (sizeof(li->hostaddr) < sa_size) 42398937Sdes bufsize = sizeof(li->hostaddr); 42498937Sdes 425147005Sdes memcpy(&li->hostaddr.sa, sa, bufsize); 42698937Sdes} 42798937Sdes 42898937Sdes 42998937Sdes/** 43098937Sdes ** login_write: Call low-level recording functions based on autoconf 43198937Sdes ** results 43298937Sdes **/ 43398937Sdesint 434147005Sdeslogin_write(struct logininfo *li) 43598937Sdes{ 43698937Sdes#ifndef HAVE_CYGWIN 437147005Sdes if (geteuid() != 0) { 438147005Sdes logit("Attempt to write login records by non-root user (aborting)"); 439147005Sdes return (1); 44098937Sdes } 44198937Sdes#endif 44298937Sdes 44398937Sdes /* set the timestamp */ 44498937Sdes login_set_current_time(li); 44598937Sdes#ifdef USE_LOGIN 44698937Sdes syslogin_write_entry(li); 44798937Sdes#endif 44898937Sdes#ifdef USE_LASTLOG 449147005Sdes if (li->type == LTYPE_LOGIN) 45098937Sdes lastlog_write_entry(li); 45198937Sdes#endif 45298937Sdes#ifdef USE_UTMP 45398937Sdes utmp_write_entry(li); 45498937Sdes#endif 45598937Sdes#ifdef USE_WTMP 45698937Sdes wtmp_write_entry(li); 45798937Sdes#endif 45898937Sdes#ifdef USE_UTMPX 45998937Sdes utmpx_write_entry(li); 46098937Sdes#endif 46198937Sdes#ifdef USE_WTMPX 46298937Sdes wtmpx_write_entry(li); 46398937Sdes#endif 464137019Sdes#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN 465149753Sdes if (li->type == LTYPE_LOGIN && 466149753Sdes !sys_auth_record_login(li->username,li->hostname,li->line, 467149753Sdes &loginmsg)) 468137019Sdes logit("Writing login record failed for %s", li->username); 469137019Sdes#endif 470147005Sdes#ifdef SSH_AUDIT_EVENTS 471147005Sdes if (li->type == LTYPE_LOGIN) 472147005Sdes audit_session_open(li->line); 473147005Sdes else if (li->type == LTYPE_LOGOUT) 474147005Sdes audit_session_close(li->line); 475147005Sdes#endif 476147005Sdes return (0); 47798937Sdes} 47898937Sdes 47998937Sdes#ifdef LOGIN_NEEDS_UTMPX 48098937Sdesint 48198937Sdeslogin_utmp_only(struct logininfo *li) 48298937Sdes{ 483126277Sdes li->type = LTYPE_LOGIN; 48498937Sdes login_set_current_time(li); 48598937Sdes# ifdef USE_UTMP 48698937Sdes utmp_write_entry(li); 48798937Sdes# endif 48898937Sdes# ifdef USE_WTMP 48998937Sdes wtmp_write_entry(li); 49098937Sdes# endif 49198937Sdes# ifdef USE_UTMPX 49298937Sdes utmpx_write_entry(li); 49398937Sdes# endif 49498937Sdes# ifdef USE_WTMPX 49598937Sdes wtmpx_write_entry(li); 49698937Sdes# endif 497147005Sdes return (0); 49898937Sdes} 49998937Sdes#endif 50098937Sdes 50198937Sdes/** 50298937Sdes ** getlast_entry: Call low-level functions to retrieve the last login 50398937Sdes ** time. 50498937Sdes **/ 50598937Sdes 50698937Sdes/* take the uid in li and return the last login time */ 50798937Sdesint 50898937Sdesgetlast_entry(struct logininfo *li) 50998937Sdes{ 51098937Sdes#ifdef USE_LASTLOG 51198937Sdes return(lastlog_get_entry(li)); 51298937Sdes#else /* !USE_LASTLOG */ 513207319Sdes#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \ 514207319Sdes defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER) 515207319Sdes return (utmpx_get_entry(li)); 516207319Sdes#endif 51798937Sdes 518202213Sed#if 1 519202213Sed return (utmpx_get_entry(li)); 520202213Sed#endif 521202213Sed 522147005Sdes#if defined(DISABLE_LASTLOG) 52398937Sdes /* On some systems we shouldn't even try to obtain last login 52498937Sdes * time, e.g. AIX */ 525147005Sdes return (0); 526147005Sdes# elif defined(USE_WTMP) && \ 527147005Sdes (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) 52898937Sdes /* retrieve last login time from utmp */ 52998937Sdes return (wtmp_get_entry(li)); 530147005Sdes# elif defined(USE_WTMPX) && \ 531147005Sdes (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) 53298937Sdes /* If wtmp isn't available, try wtmpx */ 53398937Sdes return (wtmpx_get_entry(li)); 534147005Sdes# else 53598937Sdes /* Give up: No means of retrieving last login time */ 536147005Sdes return (0); 53798937Sdes# endif /* DISABLE_LASTLOG */ 53898937Sdes#endif /* USE_LASTLOG */ 53998937Sdes} 54098937Sdes 54198937Sdes 54298937Sdes 54398937Sdes/* 54498937Sdes * 'line' string utility functions 54598937Sdes * 54698937Sdes * These functions process the 'line' string into one of three forms: 54798937Sdes * 54898937Sdes * 1. The full filename (including '/dev') 54998937Sdes * 2. The stripped name (excluding '/dev') 55098937Sdes * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 55198937Sdes * /dev/pts/1 -> ts/1 ) 55298937Sdes * 55398937Sdes * Form 3 is used on some systems to identify a .tmp.? entry when 55498937Sdes * attempting to remove it. Typically both addition and removal is 55598937Sdes * performed by one application - say, sshd - so as long as the choice 55698937Sdes * uniquely identifies a terminal it's ok. 55798937Sdes */ 55898937Sdes 55998937Sdes 560147005Sdes/* 561147005Sdes * line_fullname(): add the leading '/dev/' if it doesn't exist make 562147005Sdes * sure dst has enough space, if not just copy src (ugh) 563147005Sdes */ 56498937Sdeschar * 565149753Sdesline_fullname(char *dst, const char *src, u_int dstsize) 56698937Sdes{ 56798937Sdes memset(dst, '\0', dstsize); 568147005Sdes if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) 56998937Sdes strlcpy(dst, src, dstsize); 570147005Sdes else { 57198937Sdes strlcpy(dst, "/dev/", dstsize); 57298937Sdes strlcat(dst, src, dstsize); 57398937Sdes } 574147005Sdes return (dst); 57598937Sdes} 57698937Sdes 57798937Sdes/* line_stripname(): strip the leading '/dev' if it exists, return dst */ 57898937Sdeschar * 57998937Sdesline_stripname(char *dst, const char *src, int dstsize) 58098937Sdes{ 58198937Sdes memset(dst, '\0', dstsize); 58298937Sdes if (strncmp(src, "/dev/", 5) == 0) 58398937Sdes strlcpy(dst, src + 5, dstsize); 58498937Sdes else 58598937Sdes strlcpy(dst, src, dstsize); 586147005Sdes return (dst); 58798937Sdes} 58898937Sdes 589149753Sdes/* 590147005Sdes * line_abbrevname(): Return the abbreviated (usually four-character) 59198937Sdes * form of the line (Just use the last <dstsize> characters of the 59298937Sdes * full name.) 59398937Sdes * 59498937Sdes * NOTE: use strncpy because we do NOT necessarily want zero 595147005Sdes * termination 596147005Sdes */ 59798937Sdeschar * 59898937Sdesline_abbrevname(char *dst, const char *src, int dstsize) 59998937Sdes{ 60098937Sdes size_t len; 60198937Sdes 60298937Sdes memset(dst, '\0', dstsize); 60398937Sdes 60498937Sdes /* Always skip prefix if present */ 60598937Sdes if (strncmp(src, "/dev/", 5) == 0) 60698937Sdes src += 5; 60798937Sdes 60898937Sdes#ifdef WITH_ABBREV_NO_TTY 60998937Sdes if (strncmp(src, "tty", 3) == 0) 61098937Sdes src += 3; 61198937Sdes#endif 61298937Sdes 61398937Sdes len = strlen(src); 61498937Sdes 61598937Sdes if (len > 0) { 61698937Sdes if (((int)len - dstsize) > 0) 61798937Sdes src += ((int)len - dstsize); 61898937Sdes 61998937Sdes /* note: _don't_ change this to strlcpy */ 62098937Sdes strncpy(dst, src, (size_t)dstsize); 62198937Sdes } 62298937Sdes 623147005Sdes return (dst); 62498937Sdes} 62598937Sdes 62698937Sdes/** 62798937Sdes ** utmp utility functions 62898937Sdes ** 62998937Sdes ** These functions manipulate struct utmp, taking system differences 63098937Sdes ** into account. 63198937Sdes **/ 63298937Sdes 63398937Sdes#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) 63498937Sdes 63598937Sdes/* build the utmp structure */ 63698937Sdesvoid 63798937Sdesset_utmp_time(struct logininfo *li, struct utmp *ut) 63898937Sdes{ 639147005Sdes# if defined(HAVE_TV_IN_UTMP) 64098937Sdes ut->ut_tv.tv_sec = li->tv_sec; 64198937Sdes ut->ut_tv.tv_usec = li->tv_usec; 642147005Sdes# elif defined(HAVE_TIME_IN_UTMP) 64398937Sdes ut->ut_time = li->tv_sec; 64498937Sdes# endif 64598937Sdes} 64698937Sdes 64798937Sdesvoid 64898937Sdesconstruct_utmp(struct logininfo *li, 64998937Sdes struct utmp *ut) 65098937Sdes{ 651113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 652113911Sdes struct sockaddr_in6 *sa6; 653147005Sdes# endif 654147005Sdes 65598937Sdes memset(ut, '\0', sizeof(*ut)); 65698937Sdes 65798937Sdes /* First fill out fields used for both logins and logouts */ 65898937Sdes 65998937Sdes# ifdef HAVE_ID_IN_UTMP 66098937Sdes line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); 66198937Sdes# endif 66298937Sdes 66398937Sdes# ifdef HAVE_TYPE_IN_UTMP 66498937Sdes /* This is done here to keep utmp constants out of struct logininfo */ 66598937Sdes switch (li->type) { 66698937Sdes case LTYPE_LOGIN: 66798937Sdes ut->ut_type = USER_PROCESS; 668106130Sdes#ifdef _UNICOS 66998937Sdes cray_set_tmpdir(ut); 67098937Sdes#endif 67198937Sdes break; 67298937Sdes case LTYPE_LOGOUT: 67398937Sdes ut->ut_type = DEAD_PROCESS; 674106130Sdes#ifdef _UNICOS 67598937Sdes cray_retain_utmp(ut, li->pid); 67698937Sdes#endif 67798937Sdes break; 67898937Sdes } 67998937Sdes# endif 68098937Sdes set_utmp_time(li, ut); 68198937Sdes 68298937Sdes line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); 68398937Sdes 68498937Sdes# ifdef HAVE_PID_IN_UTMP 68598937Sdes ut->ut_pid = li->pid; 68698937Sdes# endif 68798937Sdes 68898937Sdes /* If we're logging out, leave all other fields blank */ 68998937Sdes if (li->type == LTYPE_LOGOUT) 690147005Sdes return; 69198937Sdes 69298937Sdes /* 69398937Sdes * These fields are only used when logging in, and are blank 69498937Sdes * for logouts. 69598937Sdes */ 69698937Sdes 69798937Sdes /* Use strncpy because we don't necessarily want null termination */ 698147005Sdes strncpy(ut->ut_name, li->username, 699147005Sdes MIN_SIZEOF(ut->ut_name, li->username)); 70098937Sdes# ifdef HAVE_HOST_IN_UTMP 701184122Sdes strncpy(ut->ut_host, li->hostname, 702184122Sdes MIN_SIZEOF(ut->ut_host, li->hostname)); 70398937Sdes# endif 70498937Sdes# ifdef HAVE_ADDR_IN_UTMP 70598937Sdes /* this is just a 32-bit IP address */ 70698937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 70798937Sdes ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 70898937Sdes# endif 709113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 710113911Sdes /* this is just a 128-bit IPv6 address */ 711113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 712113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 713113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 714113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 715113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 716113911Sdes ut->ut_addr_v6[1] = 0; 717113911Sdes ut->ut_addr_v6[2] = 0; 718113911Sdes ut->ut_addr_v6[3] = 0; 719113911Sdes } 720113911Sdes } 721113911Sdes# endif 72298937Sdes} 72398937Sdes#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ 72498937Sdes 72598937Sdes/** 72698937Sdes ** utmpx utility functions 72798937Sdes ** 72898937Sdes ** These functions manipulate struct utmpx, accounting for system 72998937Sdes ** variations. 73098937Sdes **/ 73198937Sdes 73298937Sdes#if defined(USE_UTMPX) || defined (USE_WTMPX) 73398937Sdes/* build the utmpx structure */ 73498937Sdesvoid 73598937Sdesset_utmpx_time(struct logininfo *li, struct utmpx *utx) 73698937Sdes{ 737147005Sdes# if defined(HAVE_TV_IN_UTMPX) 73898937Sdes utx->ut_tv.tv_sec = li->tv_sec; 73998937Sdes utx->ut_tv.tv_usec = li->tv_usec; 740147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 74198937Sdes utx->ut_time = li->tv_sec; 742147005Sdes# endif 74398937Sdes} 74498937Sdes 74598937Sdesvoid 74698937Sdesconstruct_utmpx(struct logininfo *li, struct utmpx *utx) 74798937Sdes{ 748113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 749113911Sdes struct sockaddr_in6 *sa6; 750113911Sdes# endif 75198937Sdes memset(utx, '\0', sizeof(*utx)); 752147005Sdes 75398937Sdes# ifdef HAVE_ID_IN_UTMPX 75498937Sdes line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); 75598937Sdes# endif 75698937Sdes 75798937Sdes /* this is done here to keep utmp constants out of loginrec.h */ 75898937Sdes switch (li->type) { 75998937Sdes case LTYPE_LOGIN: 76098937Sdes utx->ut_type = USER_PROCESS; 76198937Sdes break; 76298937Sdes case LTYPE_LOGOUT: 76398937Sdes utx->ut_type = DEAD_PROCESS; 76498937Sdes break; 76598937Sdes } 76698937Sdes line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); 76798937Sdes set_utmpx_time(li, utx); 76898937Sdes utx->ut_pid = li->pid; 769147005Sdes 77098937Sdes /* strncpy(): Don't necessarily want null termination */ 771202213Sed strncpy(utx->ut_user, li->username, 772202213Sed MIN_SIZEOF(utx->ut_user, li->username)); 77398937Sdes 77498937Sdes if (li->type == LTYPE_LOGOUT) 77598937Sdes return; 77698937Sdes 77798937Sdes /* 77898937Sdes * These fields are only used when logging in, and are blank 77998937Sdes * for logouts. 78098937Sdes */ 78198937Sdes 78298937Sdes# ifdef HAVE_HOST_IN_UTMPX 783147005Sdes strncpy(utx->ut_host, li->hostname, 784147005Sdes MIN_SIZEOF(utx->ut_host, li->hostname)); 78598937Sdes# endif 78698937Sdes# ifdef HAVE_ADDR_IN_UTMPX 78798937Sdes /* this is just a 32-bit IP address */ 78898937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 78998937Sdes utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 79098937Sdes# endif 791113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 792113911Sdes /* this is just a 128-bit IPv6 address */ 793113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 794113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 795113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 796113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 797113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 798113911Sdes ut->ut_addr_v6[1] = 0; 799113911Sdes ut->ut_addr_v6[2] = 0; 800113911Sdes ut->ut_addr_v6[3] = 0; 801113911Sdes } 802113911Sdes } 803113911Sdes# endif 80498937Sdes# ifdef HAVE_SYSLEN_IN_UTMPX 80598937Sdes /* ut_syslen is the length of the utx_host string */ 80698937Sdes utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); 80798937Sdes# endif 80898937Sdes} 80998937Sdes#endif /* USE_UTMPX || USE_WTMPX */ 81098937Sdes 81198937Sdes/** 81298937Sdes ** Low-level utmp functions 81398937Sdes **/ 81498937Sdes 81598937Sdes/* FIXME: (ATL) utmp_write_direct needs testing */ 81698937Sdes#ifdef USE_UTMP 81798937Sdes 81898937Sdes/* if we can, use pututline() etc. */ 81998937Sdes# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ 82098937Sdes defined(HAVE_PUTUTLINE) 82198937Sdes# define UTMP_USE_LIBRARY 82298937Sdes# endif 82398937Sdes 82498937Sdes 82598937Sdes/* write a utmp entry with the system's help (pututline() and pals) */ 82698937Sdes# ifdef UTMP_USE_LIBRARY 82798937Sdesstatic int 82898937Sdesutmp_write_library(struct logininfo *li, struct utmp *ut) 82998937Sdes{ 83098937Sdes setutent(); 83198937Sdes pututline(ut); 83298937Sdes# ifdef HAVE_ENDUTENT 83398937Sdes endutent(); 83498937Sdes# endif 835147005Sdes return (1); 83698937Sdes} 83798937Sdes# else /* UTMP_USE_LIBRARY */ 83898937Sdes 839149753Sdes/* 840147005Sdes * Write a utmp entry direct to the file 841147005Sdes * This is a slightly modification of code in OpenBSD's login.c 842147005Sdes */ 84398937Sdesstatic int 84498937Sdesutmp_write_direct(struct logininfo *li, struct utmp *ut) 84598937Sdes{ 84698937Sdes struct utmp old_ut; 84798937Sdes register int fd; 84898937Sdes int tty; 84998937Sdes 85098937Sdes /* FIXME: (ATL) ttyslot() needs local implementation */ 85198937Sdes 85298937Sdes#if defined(HAVE_GETTTYENT) 853147005Sdes struct ttyent *ty; 85498937Sdes 85598937Sdes tty=0; 85698937Sdes setttyent(); 857147005Sdes while (NULL != (ty = getttyent())) { 85898937Sdes tty++; 85998937Sdes if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) 86098937Sdes break; 86198937Sdes } 86298937Sdes endttyent(); 86398937Sdes 864147005Sdes if (NULL == ty) { 865137019Sdes logit("%s: tty not found", __func__); 866137019Sdes return (0); 86798937Sdes } 86898937Sdes#else /* FIXME */ 86998937Sdes 87098937Sdes tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ 87198937Sdes 87298937Sdes#endif /* HAVE_GETTTYENT */ 87398937Sdes 87498937Sdes if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { 875137019Sdes off_t pos, ret; 876137019Sdes 877137019Sdes pos = (off_t)tty * sizeof(struct utmp); 878137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 879147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 880137019Sdes return (0); 881137019Sdes } 882137019Sdes if (ret != pos) { 883149753Sdes logit("%s: Couldn't seek to tty %d slot in %s", 884147005Sdes __func__, tty, UTMP_FILE); 885137019Sdes return (0); 886137019Sdes } 88798937Sdes /* 88898937Sdes * Prevent luser from zero'ing out ut_host. 88998937Sdes * If the new ut_line is empty but the old one is not 89098937Sdes * and ut_line and ut_name match, preserve the old ut_line. 89198937Sdes */ 89298937Sdes if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && 893147005Sdes (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && 894147005Sdes (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && 895147005Sdes (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) 896147005Sdes memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); 89798937Sdes 898137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 899147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 900137019Sdes return (0); 901137019Sdes } 902137019Sdes if (ret != pos) { 903147005Sdes logit("%s: Couldn't seek to tty %d slot in %s", 904137019Sdes __func__, tty, UTMP_FILE); 905137019Sdes return (0); 906137019Sdes } 907147005Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 908137019Sdes logit("%s: error writing %s: %s", __func__, 90998937Sdes UTMP_FILE, strerror(errno)); 910147005Sdes } 91198937Sdes 912147005Sdes close(fd); 913147005Sdes return (1); 91498937Sdes } else { 915147005Sdes return (0); 91698937Sdes } 91798937Sdes} 91898937Sdes# endif /* UTMP_USE_LIBRARY */ 91998937Sdes 92098937Sdesstatic int 92198937Sdesutmp_perform_login(struct logininfo *li) 92298937Sdes{ 92398937Sdes struct utmp ut; 92498937Sdes 92598937Sdes construct_utmp(li, &ut); 92698937Sdes# ifdef UTMP_USE_LIBRARY 92798937Sdes if (!utmp_write_library(li, &ut)) { 928147005Sdes logit("%s: utmp_write_library() failed", __func__); 929147005Sdes return (0); 93098937Sdes } 93198937Sdes# else 93298937Sdes if (!utmp_write_direct(li, &ut)) { 933147005Sdes logit("%s: utmp_write_direct() failed", __func__); 934147005Sdes return (0); 93598937Sdes } 93698937Sdes# endif 937147005Sdes return (1); 93898937Sdes} 93998937Sdes 94098937Sdes 94198937Sdesstatic int 94298937Sdesutmp_perform_logout(struct logininfo *li) 94398937Sdes{ 94498937Sdes struct utmp ut; 94598937Sdes 94698937Sdes construct_utmp(li, &ut); 94798937Sdes# ifdef UTMP_USE_LIBRARY 94898937Sdes if (!utmp_write_library(li, &ut)) { 949147005Sdes logit("%s: utmp_write_library() failed", __func__); 950147005Sdes return (0); 95198937Sdes } 95298937Sdes# else 95398937Sdes if (!utmp_write_direct(li, &ut)) { 954147005Sdes logit("%s: utmp_write_direct() failed", __func__); 955147005Sdes return (0); 95698937Sdes } 95798937Sdes# endif 958147005Sdes return (1); 95998937Sdes} 96098937Sdes 96198937Sdes 96298937Sdesint 96398937Sdesutmp_write_entry(struct logininfo *li) 96498937Sdes{ 96598937Sdes switch(li->type) { 96698937Sdes case LTYPE_LOGIN: 967147005Sdes return (utmp_perform_login(li)); 96898937Sdes 96998937Sdes case LTYPE_LOGOUT: 970147005Sdes return (utmp_perform_logout(li)); 97198937Sdes 97298937Sdes default: 973147005Sdes logit("%s: invalid type field", __func__); 974147005Sdes return (0); 97598937Sdes } 97698937Sdes} 97798937Sdes#endif /* USE_UTMP */ 97898937Sdes 97998937Sdes 98098937Sdes/** 98198937Sdes ** Low-level utmpx functions 98298937Sdes **/ 98398937Sdes 98498937Sdes/* not much point if we don't want utmpx entries */ 98598937Sdes#ifdef USE_UTMPX 98698937Sdes 98798937Sdes/* if we have the wherewithall, use pututxline etc. */ 98898937Sdes# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ 98998937Sdes defined(HAVE_PUTUTXLINE) 99098937Sdes# define UTMPX_USE_LIBRARY 99198937Sdes# endif 99298937Sdes 99398937Sdes 99498937Sdes/* write a utmpx entry with the system's help (pututxline() and pals) */ 99598937Sdes# ifdef UTMPX_USE_LIBRARY 99698937Sdesstatic int 99798937Sdesutmpx_write_library(struct logininfo *li, struct utmpx *utx) 99898937Sdes{ 99998937Sdes setutxent(); 100098937Sdes pututxline(utx); 100198937Sdes 100298937Sdes# ifdef HAVE_ENDUTXENT 100398937Sdes endutxent(); 100498937Sdes# endif 1005147005Sdes return (1); 100698937Sdes} 100798937Sdes 100898937Sdes# else /* UTMPX_USE_LIBRARY */ 100998937Sdes 101098937Sdes/* write a utmp entry direct to the file */ 101198937Sdesstatic int 101298937Sdesutmpx_write_direct(struct logininfo *li, struct utmpx *utx) 101398937Sdes{ 1014147005Sdes logit("%s: not implemented!", __func__); 1015147005Sdes return (0); 101698937Sdes} 101798937Sdes# endif /* UTMPX_USE_LIBRARY */ 101898937Sdes 101998937Sdesstatic int 102098937Sdesutmpx_perform_login(struct logininfo *li) 102198937Sdes{ 102298937Sdes struct utmpx utx; 102398937Sdes 102498937Sdes construct_utmpx(li, &utx); 102598937Sdes# ifdef UTMPX_USE_LIBRARY 102698937Sdes if (!utmpx_write_library(li, &utx)) { 1027147005Sdes logit("%s: utmp_write_library() failed", __func__); 1028147005Sdes return (0); 102998937Sdes } 103098937Sdes# else 103198937Sdes if (!utmpx_write_direct(li, &ut)) { 1032147005Sdes logit("%s: utmp_write_direct() failed", __func__); 1033147005Sdes return (0); 103498937Sdes } 103598937Sdes# endif 1036147005Sdes return (1); 103798937Sdes} 103898937Sdes 103998937Sdes 104098937Sdesstatic int 104198937Sdesutmpx_perform_logout(struct logininfo *li) 104298937Sdes{ 104398937Sdes struct utmpx utx; 104498937Sdes 104598937Sdes construct_utmpx(li, &utx); 104698937Sdes# ifdef HAVE_ID_IN_UTMPX 104798937Sdes line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); 104898937Sdes# endif 104998937Sdes# ifdef HAVE_TYPE_IN_UTMPX 105098937Sdes utx.ut_type = DEAD_PROCESS; 105198937Sdes# endif 105298937Sdes 105398937Sdes# ifdef UTMPX_USE_LIBRARY 105498937Sdes utmpx_write_library(li, &utx); 105598937Sdes# else 105698937Sdes utmpx_write_direct(li, &utx); 105798937Sdes# endif 1058147005Sdes return (1); 105998937Sdes} 106098937Sdes 106198937Sdesint 106298937Sdesutmpx_write_entry(struct logininfo *li) 106398937Sdes{ 106498937Sdes switch(li->type) { 106598937Sdes case LTYPE_LOGIN: 1066147005Sdes return (utmpx_perform_login(li)); 106798937Sdes case LTYPE_LOGOUT: 1068147005Sdes return (utmpx_perform_logout(li)); 106998937Sdes default: 1070147005Sdes logit("%s: invalid type field", __func__); 1071147005Sdes return (0); 107298937Sdes } 107398937Sdes} 107498937Sdes#endif /* USE_UTMPX */ 107598937Sdes 107698937Sdes 107798937Sdes/** 107898937Sdes ** Low-level wtmp functions 107998937Sdes **/ 108098937Sdes 108198937Sdes#ifdef USE_WTMP 108298937Sdes 1083149753Sdes/* 1084147005Sdes * Write a wtmp entry direct to the end of the file 1085147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1086147005Sdes */ 108798937Sdesstatic int 108898937Sdeswtmp_write(struct logininfo *li, struct utmp *ut) 108998937Sdes{ 109098937Sdes struct stat buf; 109198937Sdes int fd, ret = 1; 109298937Sdes 109398937Sdes if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1094147005Sdes logit("%s: problem writing %s: %s", __func__, 109598937Sdes WTMP_FILE, strerror(errno)); 1096147005Sdes return (0); 109798937Sdes } 109898937Sdes if (fstat(fd, &buf) == 0) 1099124211Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 110098937Sdes ftruncate(fd, buf.st_size); 1101147005Sdes logit("%s: problem writing %s: %s", __func__, 110298937Sdes WTMP_FILE, strerror(errno)); 110398937Sdes ret = 0; 110498937Sdes } 1105147005Sdes close(fd); 1106147005Sdes return (ret); 110798937Sdes} 110898937Sdes 110998937Sdesstatic int 111098937Sdeswtmp_perform_login(struct logininfo *li) 111198937Sdes{ 111298937Sdes struct utmp ut; 111398937Sdes 111498937Sdes construct_utmp(li, &ut); 1115147005Sdes return (wtmp_write(li, &ut)); 111698937Sdes} 111798937Sdes 111898937Sdes 111998937Sdesstatic int 112098937Sdeswtmp_perform_logout(struct logininfo *li) 112198937Sdes{ 112298937Sdes struct utmp ut; 112398937Sdes 112498937Sdes construct_utmp(li, &ut); 1125147005Sdes return (wtmp_write(li, &ut)); 112698937Sdes} 112798937Sdes 112898937Sdes 112998937Sdesint 113098937Sdeswtmp_write_entry(struct logininfo *li) 113198937Sdes{ 113298937Sdes switch(li->type) { 113398937Sdes case LTYPE_LOGIN: 1134147005Sdes return (wtmp_perform_login(li)); 113598937Sdes case LTYPE_LOGOUT: 1136147005Sdes return (wtmp_perform_logout(li)); 113798937Sdes default: 1138147005Sdes logit("%s: invalid type field", __func__); 1139147005Sdes return (0); 114098937Sdes } 114198937Sdes} 114298937Sdes 114398937Sdes 1144149753Sdes/* 1145147005Sdes * Notes on fetching login data from wtmp/wtmpx 114698937Sdes * 114798937Sdes * Logouts are usually recorded with (amongst other things) a blank 114898937Sdes * username on a given tty line. However, some systems (HP-UX is one) 114998937Sdes * leave all fields set, but change the ut_type field to DEAD_PROCESS. 115098937Sdes * 115198937Sdes * Since we're only looking for logins here, we know that the username 115298937Sdes * must be set correctly. On systems that leave it in, we check for 115398937Sdes * ut_type==USER_PROCESS (indicating a login.) 115498937Sdes * 115598937Sdes * Portability: Some systems may set something other than USER_PROCESS 115698937Sdes * to indicate a login process. I don't know of any as I write. Also, 115798937Sdes * it's possible that some systems may both leave the username in 115898937Sdes * place and not have ut_type. 115998937Sdes */ 116098937Sdes 116198937Sdes/* return true if this wtmp entry indicates a login */ 116298937Sdesstatic int 116398937Sdeswtmp_islogin(struct logininfo *li, struct utmp *ut) 116498937Sdes{ 116598937Sdes if (strncmp(li->username, ut->ut_name, 1166147005Sdes MIN_SIZEOF(li->username, ut->ut_name)) == 0) { 116798937Sdes# ifdef HAVE_TYPE_IN_UTMP 116898937Sdes if (ut->ut_type & USER_PROCESS) 1169147005Sdes return (1); 117098937Sdes# else 1171147005Sdes return (1); 117298937Sdes# endif 117398937Sdes } 1174147005Sdes return (0); 117598937Sdes} 117698937Sdes 117798937Sdesint 117898937Sdeswtmp_get_entry(struct logininfo *li) 117998937Sdes{ 118098937Sdes struct stat st; 118198937Sdes struct utmp ut; 1182147005Sdes int fd, found = 0; 118398937Sdes 118498937Sdes /* Clear the time entries in our logininfo */ 118598937Sdes li->tv_sec = li->tv_usec = 0; 118698937Sdes 118798937Sdes if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { 1188149753Sdes logit("%s: problem opening %s: %s", __func__, 118998937Sdes WTMP_FILE, strerror(errno)); 1190147005Sdes return (0); 119198937Sdes } 119298937Sdes if (fstat(fd, &st) != 0) { 1193149753Sdes logit("%s: couldn't stat %s: %s", __func__, 119498937Sdes WTMP_FILE, strerror(errno)); 119598937Sdes close(fd); 1196147005Sdes return (0); 119798937Sdes } 119898937Sdes 119998937Sdes /* Seek to the start of the last struct utmp */ 120098937Sdes if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { 120198937Sdes /* Looks like we've got a fresh wtmp file */ 120298937Sdes close(fd); 1203147005Sdes return (0); 120498937Sdes } 120598937Sdes 120698937Sdes while (!found) { 120798937Sdes if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { 1208149753Sdes logit("%s: read of %s failed: %s", __func__, 120998937Sdes WTMP_FILE, strerror(errno)); 121098937Sdes close (fd); 1211147005Sdes return (0); 121298937Sdes } 121398937Sdes if ( wtmp_islogin(li, &ut) ) { 121498937Sdes found = 1; 1215147005Sdes /* 1216147005Sdes * We've already checked for a time in struct 1217147005Sdes * utmp, in login_getlast() 1218147005Sdes */ 121998937Sdes# ifdef HAVE_TIME_IN_UTMP 122098937Sdes li->tv_sec = ut.ut_time; 122198937Sdes# else 122298937Sdes# if HAVE_TV_IN_UTMP 122398937Sdes li->tv_sec = ut.ut_tv.tv_sec; 122498937Sdes# endif 122598937Sdes# endif 122698937Sdes line_fullname(li->line, ut.ut_line, 1227147005Sdes MIN_SIZEOF(li->line, ut.ut_line)); 122898937Sdes# ifdef HAVE_HOST_IN_UTMP 122998937Sdes strlcpy(li->hostname, ut.ut_host, 1230147005Sdes MIN_SIZEOF(li->hostname, ut.ut_host)); 123198937Sdes# endif 123298937Sdes continue; 123398937Sdes } 123498937Sdes /* Seek back 2 x struct utmp */ 123598937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { 123698937Sdes /* We've found the start of the file, so quit */ 1237147005Sdes close(fd); 1238147005Sdes return (0); 123998937Sdes } 124098937Sdes } 124198937Sdes 124298937Sdes /* We found an entry. Tidy up and return */ 124398937Sdes close(fd); 1244147005Sdes return (1); 124598937Sdes} 124698937Sdes# endif /* USE_WTMP */ 124798937Sdes 124898937Sdes 124998937Sdes/** 125098937Sdes ** Low-level wtmpx functions 125198937Sdes **/ 125298937Sdes 125398937Sdes#ifdef USE_WTMPX 1254147005Sdes/* 1255147005Sdes * Write a wtmpx entry direct to the end of the file 1256147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1257147005Sdes */ 125898937Sdesstatic int 125998937Sdeswtmpx_write(struct logininfo *li, struct utmpx *utx) 126098937Sdes{ 1261126277Sdes#ifndef HAVE_UPDWTMPX 126298937Sdes struct stat buf; 126398937Sdes int fd, ret = 1; 126498937Sdes 126598937Sdes if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1266149753Sdes logit("%s: problem opening %s: %s", __func__, 126798937Sdes WTMPX_FILE, strerror(errno)); 1268147005Sdes return (0); 126998937Sdes } 127098937Sdes 127198937Sdes if (fstat(fd, &buf) == 0) 1272124211Sdes if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { 127398937Sdes ftruncate(fd, buf.st_size); 1274147005Sdes logit("%s: problem writing %s: %s", __func__, 127598937Sdes WTMPX_FILE, strerror(errno)); 127698937Sdes ret = 0; 127798937Sdes } 1278147005Sdes close(fd); 127998937Sdes 1280147005Sdes return (ret); 1281126277Sdes#else 1282126277Sdes updwtmpx(WTMPX_FILE, utx); 1283147005Sdes return (1); 1284126277Sdes#endif 128598937Sdes} 128698937Sdes 128798937Sdes 128898937Sdesstatic int 128998937Sdeswtmpx_perform_login(struct logininfo *li) 129098937Sdes{ 129198937Sdes struct utmpx utx; 129298937Sdes 129398937Sdes construct_utmpx(li, &utx); 1294147005Sdes return (wtmpx_write(li, &utx)); 129598937Sdes} 129698937Sdes 129798937Sdes 129898937Sdesstatic int 129998937Sdeswtmpx_perform_logout(struct logininfo *li) 130098937Sdes{ 130198937Sdes struct utmpx utx; 130298937Sdes 130398937Sdes construct_utmpx(li, &utx); 1304147005Sdes return (wtmpx_write(li, &utx)); 130598937Sdes} 130698937Sdes 130798937Sdes 130898937Sdesint 130998937Sdeswtmpx_write_entry(struct logininfo *li) 131098937Sdes{ 131198937Sdes switch(li->type) { 131298937Sdes case LTYPE_LOGIN: 1313147005Sdes return (wtmpx_perform_login(li)); 131498937Sdes case LTYPE_LOGOUT: 1315147005Sdes return (wtmpx_perform_logout(li)); 131698937Sdes default: 1317147005Sdes logit("%s: invalid type field", __func__); 1318147005Sdes return (0); 131998937Sdes } 132098937Sdes} 132198937Sdes 132298937Sdes/* Please see the notes above wtmp_islogin() for information about the 132398937Sdes next two functions */ 132498937Sdes 132598937Sdes/* Return true if this wtmpx entry indicates a login */ 132698937Sdesstatic int 132798937Sdeswtmpx_islogin(struct logininfo *li, struct utmpx *utx) 132898937Sdes{ 1329204917Sdes if (strncmp(li->username, utx->ut_user, 1330204917Sdes MIN_SIZEOF(li->username, utx->ut_user)) == 0 ) { 133198937Sdes# ifdef HAVE_TYPE_IN_UTMPX 133298937Sdes if (utx->ut_type == USER_PROCESS) 1333147005Sdes return (1); 133498937Sdes# else 1335147005Sdes return (1); 133698937Sdes# endif 133798937Sdes } 1338147005Sdes return (0); 133998937Sdes} 134098937Sdes 134198937Sdes 134298937Sdesint 134398937Sdeswtmpx_get_entry(struct logininfo *li) 134498937Sdes{ 134598937Sdes struct stat st; 134698937Sdes struct utmpx utx; 134798937Sdes int fd, found=0; 134898937Sdes 134998937Sdes /* Clear the time entries */ 135098937Sdes li->tv_sec = li->tv_usec = 0; 135198937Sdes 135298937Sdes if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { 1353149753Sdes logit("%s: problem opening %s: %s", __func__, 135498937Sdes WTMPX_FILE, strerror(errno)); 1355147005Sdes return (0); 135698937Sdes } 135798937Sdes if (fstat(fd, &st) != 0) { 1358149753Sdes logit("%s: couldn't stat %s: %s", __func__, 1359106130Sdes WTMPX_FILE, strerror(errno)); 136098937Sdes close(fd); 1361147005Sdes return (0); 136298937Sdes } 136398937Sdes 136498937Sdes /* Seek to the start of the last struct utmpx */ 136598937Sdes if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { 136698937Sdes /* probably a newly rotated wtmpx file */ 136798937Sdes close(fd); 1368147005Sdes return (0); 136998937Sdes } 137098937Sdes 137198937Sdes while (!found) { 137298937Sdes if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { 1373149753Sdes logit("%s: read of %s failed: %s", __func__, 137498937Sdes WTMPX_FILE, strerror(errno)); 137598937Sdes close (fd); 1376147005Sdes return (0); 137798937Sdes } 1378147005Sdes /* 1379149753Sdes * Logouts are recorded as a blank username on a particular 1380147005Sdes * line. So, we just need to find the username in struct utmpx 1381147005Sdes */ 1382147005Sdes if (wtmpx_islogin(li, &utx)) { 1383106130Sdes found = 1; 1384147005Sdes# if defined(HAVE_TV_IN_UTMPX) 138598937Sdes li->tv_sec = utx.ut_tv.tv_sec; 1386147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 138798937Sdes li->tv_sec = utx.ut_time; 138898937Sdes# endif 138998937Sdes line_fullname(li->line, utx.ut_line, sizeof(li->line)); 1390147005Sdes# if defined(HAVE_HOST_IN_UTMPX) 139198937Sdes strlcpy(li->hostname, utx.ut_host, 1392147005Sdes MIN_SIZEOF(li->hostname, utx.ut_host)); 139398937Sdes# endif 139498937Sdes continue; 139598937Sdes } 139698937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { 1397147005Sdes close(fd); 1398147005Sdes return (0); 139998937Sdes } 140098937Sdes } 140198937Sdes 140298937Sdes close(fd); 1403147005Sdes return (1); 140498937Sdes} 140598937Sdes#endif /* USE_WTMPX */ 140698937Sdes 140798937Sdes/** 140898937Sdes ** Low-level libutil login() functions 140998937Sdes **/ 141098937Sdes 141198937Sdes#ifdef USE_LOGIN 141298937Sdesstatic int 141398937Sdessyslogin_perform_login(struct logininfo *li) 141498937Sdes{ 141598937Sdes struct utmp *ut; 141698937Sdes 1417147005Sdes ut = xmalloc(sizeof(*ut)); 141898937Sdes construct_utmp(li, ut); 141998937Sdes login(ut); 1420113911Sdes free(ut); 142198937Sdes 1422147005Sdes return (1); 142398937Sdes} 142498937Sdes 142598937Sdesstatic int 142698937Sdessyslogin_perform_logout(struct logininfo *li) 142798937Sdes{ 142898937Sdes# ifdef HAVE_LOGOUT 1429128460Sdes char line[UT_LINESIZE]; 143098937Sdes 143198937Sdes (void)line_stripname(line, li->line, sizeof(line)); 143298937Sdes 1433147005Sdes if (!logout(line)) 1434147005Sdes logit("%s: logout() returned an error", __func__); 143598937Sdes# ifdef HAVE_LOGWTMP 1436147005Sdes else 143798937Sdes logwtmp(line, "", ""); 143898937Sdes# endif 143998937Sdes /* FIXME: (ATL - if the need arises) What to do if we have 144098937Sdes * login, but no logout? what if logout but no logwtmp? All 144198937Sdes * routines are in libutil so they should all be there, 144298937Sdes * but... */ 144398937Sdes# endif 1444147005Sdes return (1); 144598937Sdes} 144698937Sdes 144798937Sdesint 144898937Sdessyslogin_write_entry(struct logininfo *li) 144998937Sdes{ 145098937Sdes switch (li->type) { 145198937Sdes case LTYPE_LOGIN: 1452147005Sdes return (syslogin_perform_login(li)); 145398937Sdes case LTYPE_LOGOUT: 1454147005Sdes return (syslogin_perform_logout(li)); 145598937Sdes default: 1456147005Sdes logit("%s: Invalid type field", __func__); 1457147005Sdes return (0); 145898937Sdes } 145998937Sdes} 146098937Sdes#endif /* USE_LOGIN */ 146198937Sdes 146298937Sdes/* end of file log-syslogin.c */ 146398937Sdes 146498937Sdes/** 146598937Sdes ** Low-level lastlog functions 146698937Sdes **/ 146798937Sdes 146898937Sdes#ifdef USE_LASTLOG 146998937Sdes 1470192595Sdes#if !defined(LASTLOG_WRITE_PUTUTXLINE) || !defined(HAVE_GETLASTLOGXBYNAME) 1471192595Sdes/* open the file (using filemode) and seek to the login entry */ 147298937Sdesstatic int 1473192595Sdeslastlog_openseek(struct logininfo *li, int *fd, int filemode) 147498937Sdes{ 1475192595Sdes off_t offset; 1476192595Sdes char lastlog_file[1024]; 147798937Sdes struct stat st; 147898937Sdes 147998937Sdes if (stat(LASTLOG_FILE, &st) != 0) { 1480147005Sdes logit("%s: Couldn't stat %s: %s", __func__, 1481147005Sdes LASTLOG_FILE, strerror(errno)); 1482147005Sdes return (0); 148398937Sdes } 1484192595Sdes if (S_ISDIR(st.st_mode)) { 1485147005Sdes snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", 1486147005Sdes LASTLOG_FILE, li->username); 1487192595Sdes } else if (S_ISREG(st.st_mode)) { 1488192595Sdes strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file)); 1489192595Sdes } else { 1490147005Sdes logit("%s: %.100s is not a file or directory!", __func__, 1491147005Sdes LASTLOG_FILE); 1492147005Sdes return (0); 149398937Sdes } 149498937Sdes 1495124211Sdes *fd = open(lastlog_file, filemode, 0600); 1496147005Sdes if (*fd < 0) { 1497147005Sdes debug("%s: Couldn't open %s: %s", __func__, 149898937Sdes lastlog_file, strerror(errno)); 1499147005Sdes return (0); 150098937Sdes } 150198937Sdes 1502192595Sdes if (S_ISREG(st.st_mode)) { 150398937Sdes /* find this uid's offset in the lastlog file */ 150498937Sdes offset = (off_t) ((long)li->uid * sizeof(struct lastlog)); 150598937Sdes 1506147005Sdes if (lseek(*fd, offset, SEEK_SET) != offset) { 1507147005Sdes logit("%s: %s->lseek(): %s", __func__, 1508147005Sdes lastlog_file, strerror(errno)); 1509147005Sdes return (0); 151098937Sdes } 151198937Sdes } 151298937Sdes 1513147005Sdes return (1); 151498937Sdes} 1515192595Sdes#endif /* !LASTLOG_WRITE_PUTUTXLINE || !HAVE_GETLASTLOGXBYNAME */ 151698937Sdes 1517192595Sdes#ifdef LASTLOG_WRITE_PUTUTXLINE 1518192595Sdesint 1519192595Sdeslastlog_write_entry(struct logininfo *li) 152098937Sdes{ 1521192595Sdes switch(li->type) { 1522192595Sdes case LTYPE_LOGIN: 1523192595Sdes return 1; /* lastlog written by pututxline */ 1524192595Sdes default: 1525192595Sdes logit("lastlog_write_entry: Invalid type field"); 1526192595Sdes return 0; 152798937Sdes } 152898937Sdes} 1529192595Sdes#else /* LASTLOG_WRITE_PUTUTXLINE */ 153098937Sdesint 153198937Sdeslastlog_write_entry(struct logininfo *li) 153298937Sdes{ 1533192595Sdes struct lastlog last; 1534192595Sdes int fd; 1535192595Sdes 153698937Sdes switch(li->type) { 153798937Sdes case LTYPE_LOGIN: 1538192595Sdes /* create our struct lastlog */ 1539192595Sdes memset(&last, '\0', sizeof(last)); 1540192595Sdes line_stripname(last.ll_line, li->line, sizeof(last.ll_line)); 1541192595Sdes strlcpy(last.ll_host, li->hostname, 1542192595Sdes MIN_SIZEOF(last.ll_host, li->hostname)); 1543192595Sdes last.ll_time = li->tv_sec; 1544192595Sdes 1545192595Sdes if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) 1546192595Sdes return (0); 1547192595Sdes 1548192595Sdes /* write the entry */ 1549192595Sdes if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { 1550192595Sdes close(fd); 1551192595Sdes logit("%s: Error writing to %s: %s", __func__, 1552192595Sdes LASTLOG_FILE, strerror(errno)); 1553192595Sdes return (0); 1554192595Sdes } 1555192595Sdes 1556192595Sdes close(fd); 1557192595Sdes return (1); 155898937Sdes default: 1559147005Sdes logit("%s: Invalid type field", __func__); 1560147005Sdes return (0); 156198937Sdes } 156298937Sdes} 1563192595Sdes#endif /* LASTLOG_WRITE_PUTUTXLINE */ 156498937Sdes 1565192595Sdes#ifdef HAVE_GETLASTLOGXBYNAME 1566192595Sdesint 1567192595Sdeslastlog_get_entry(struct logininfo *li) 156898937Sdes{ 1569192595Sdes struct lastlogx l, *ll; 1570192595Sdes 1571192595Sdes if ((ll = getlastlogxbyname(li->username, &l)) == NULL) { 1572192595Sdes memset(&l, '\0', sizeof(l)); 1573192595Sdes ll = &l; 1574192595Sdes } 1575192595Sdes line_fullname(li->line, ll->ll_line, sizeof(li->line)); 1576192595Sdes strlcpy(li->hostname, ll->ll_host, 1577192595Sdes MIN_SIZEOF(li->hostname, ll->ll_host)); 1578192595Sdes li->tv_sec = ll->ll_tv.tv_sec; 1579192595Sdes li->tv_usec = ll->ll_tv.tv_usec; 1580192595Sdes return (1); 158198937Sdes} 1582192595Sdes#else /* HAVE_GETLASTLOGXBYNAME */ 158398937Sdesint 158498937Sdeslastlog_get_entry(struct logininfo *li) 158598937Sdes{ 158698937Sdes struct lastlog last; 1587113911Sdes int fd, ret; 158898937Sdes 158998937Sdes if (!lastlog_openseek(li, &fd, O_RDONLY)) 1590113911Sdes return (0); 159198937Sdes 1592113911Sdes ret = atomicio(read, fd, &last, sizeof(last)); 1593113911Sdes close(fd); 1594113911Sdes 1595113911Sdes switch (ret) { 1596113911Sdes case 0: 1597113911Sdes memset(&last, '\0', sizeof(last)); 1598113911Sdes /* FALLTHRU */ 1599113911Sdes case sizeof(last): 1600192595Sdes line_fullname(li->line, last.ll_line, sizeof(li->line)); 1601192595Sdes strlcpy(li->hostname, last.ll_host, 1602192595Sdes MIN_SIZEOF(li->hostname, last.ll_host)); 1603192595Sdes li->tv_sec = last.ll_time; 1604113911Sdes return (1); 1605113911Sdes case -1: 1606126277Sdes error("%s: Error reading from %s: %s", __func__, 160798937Sdes LASTLOG_FILE, strerror(errno)); 1608113911Sdes return (0); 1609113911Sdes default: 1610113911Sdes error("%s: Error reading from %s: Expecting %d, got %d", 1611157019Sdes __func__, LASTLOG_FILE, (int)sizeof(last), ret); 1612113911Sdes return (0); 161398937Sdes } 161498937Sdes 1615113911Sdes /* NOTREACHED */ 1616113911Sdes return (0); 161798937Sdes} 1618192595Sdes#endif /* HAVE_GETLASTLOGXBYNAME */ 161998937Sdes#endif /* USE_LASTLOG */ 1620147005Sdes 1621207319Sdes#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \ 1622207319Sdes defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER) 1623202213Sedint 1624202213Sedutmpx_get_entry(struct logininfo *li) 1625202213Sed{ 1626202213Sed struct utmpx *utx; 1627202213Sed 1628202213Sed if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0) 1629202213Sed return (0); 1630202213Sed utx = getutxuser(li->username); 1631202213Sed if (utx == NULL) { 1632202213Sed endutxent(); 1633202213Sed return (0); 1634202213Sed } 1635202213Sed 1636202213Sed line_fullname(li->line, utx->ut_line, 1637202213Sed MIN_SIZEOF(li->line, utx->ut_line)); 1638202213Sed strlcpy(li->hostname, utx->ut_host, 1639202213Sed MIN_SIZEOF(li->hostname, utx->ut_host)); 1640202213Sed li->tv_sec = utx->ut_tv.tv_sec; 1641202213Sed li->tv_usec = utx->ut_tv.tv_usec; 1642202213Sed endutxent(); 1643202213Sed return (1); 1644202213Sed} 1645207319Sdes#endif /* USE_UTMPX && HAVE_SETUTXDB && UTXDB_LASTLOGIN && HAVE_GETUTXUSER */ 1646202213Sed 1647147005Sdes#ifdef USE_BTMP 1648147005Sdes /* 1649147005Sdes * Logs failed login attempts in _PATH_BTMP if that exists. 1650147005Sdes * The most common login failure is to give password instead of username. 1651147005Sdes * So the _PATH_BTMP file checked for the correct permission, so that 1652147005Sdes * only root can read it. 1653147005Sdes */ 1654147005Sdes 1655147005Sdesvoid 1656147005Sdesrecord_failed_login(const char *username, const char *hostname, 1657147005Sdes const char *ttyn) 1658147005Sdes{ 1659147005Sdes int fd; 1660147005Sdes struct utmp ut; 1661147005Sdes struct sockaddr_storage from; 1662157019Sdes socklen_t fromlen = sizeof(from); 1663147005Sdes struct sockaddr_in *a4; 1664147005Sdes struct sockaddr_in6 *a6; 1665147005Sdes time_t t; 1666147005Sdes struct stat fst; 1667147005Sdes 1668147005Sdes if (geteuid() != 0) 1669147005Sdes return; 1670147005Sdes if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { 1671147005Sdes debug("Unable to open the btmp file %s: %s", _PATH_BTMP, 1672147005Sdes strerror(errno)); 1673147005Sdes return; 1674147005Sdes } 1675147005Sdes if (fstat(fd, &fst) < 0) { 1676147005Sdes logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, 1677147005Sdes strerror(errno)); 1678147005Sdes goto out; 1679147005Sdes } 1680147005Sdes if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){ 1681147005Sdes logit("Excess permission or bad ownership on file %s", 1682147005Sdes _PATH_BTMP); 1683147005Sdes goto out; 1684147005Sdes } 1685147005Sdes 1686147005Sdes memset(&ut, 0, sizeof(ut)); 1687147005Sdes /* strncpy because we don't necessarily want nul termination */ 1688147005Sdes strncpy(ut.ut_user, username, sizeof(ut.ut_user)); 1689147005Sdes strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); 1690147005Sdes 1691147005Sdes time(&t); 1692147005Sdes ut.ut_time = t; /* ut_time is not always a time_t */ 1693147005Sdes ut.ut_type = LOGIN_PROCESS; 1694147005Sdes ut.ut_pid = getpid(); 1695147005Sdes 1696147005Sdes /* strncpy because we don't necessarily want nul termination */ 1697147005Sdes strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); 1698147005Sdes 1699147005Sdes if (packet_connection_is_on_socket() && 1700147005Sdes getpeername(packet_get_connection_in(), 1701147005Sdes (struct sockaddr *)&from, &fromlen) == 0) { 1702147005Sdes ipv64_normalise_mapped(&from, &fromlen); 1703147005Sdes if (from.ss_family == AF_INET) { 1704147005Sdes a4 = (struct sockaddr_in *)&from; 1705147005Sdes memcpy(&ut.ut_addr, &(a4->sin_addr), 1706147005Sdes MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); 1707147005Sdes } 1708147005Sdes#ifdef HAVE_ADDR_V6_IN_UTMP 1709147005Sdes if (from.ss_family == AF_INET6) { 1710147005Sdes a6 = (struct sockaddr_in6 *)&from; 1711147005Sdes memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), 1712147005Sdes MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); 1713147005Sdes } 1714147005Sdes#endif 1715147005Sdes } 1716147005Sdes 1717147005Sdes if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) 1718147005Sdes error("Failed to write to %s: %s", _PATH_BTMP, 1719147005Sdes strerror(errno)); 1720147005Sdes 1721147005Sdesout: 1722147005Sdes close(fd); 1723147005Sdes} 1724147005Sdes#endif /* USE_BTMP */ 1725