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" 14998937Sdes 150162856Sdes#include <sys/types.h> 151162856Sdes#include <sys/stat.h> 152162856Sdes#include <sys/socket.h> 153162856Sdes 154162856Sdes#include <netinet/in.h> 155162856Sdes 156162856Sdes#include <errno.h> 157162856Sdes#include <fcntl.h> 158162856Sdes#ifdef HAVE_PATHS_H 159162856Sdes# include <paths.h> 160162856Sdes#endif 161162856Sdes#include <pwd.h> 162162856Sdes#include <stdarg.h> 163162856Sdes#include <string.h> 164181111Sdes#include <time.h> 165162856Sdes#include <unistd.h> 166162856Sdes 167162856Sdes#include "xmalloc.h" 168162856Sdes#include "key.h" 169162856Sdes#include "hostfile.h" 17098937Sdes#include "ssh.h" 17198937Sdes#include "loginrec.h" 17298937Sdes#include "log.h" 17398937Sdes#include "atomicio.h" 174147005Sdes#include "packet.h" 175147005Sdes#include "canohost.h" 176147005Sdes#include "auth.h" 177147005Sdes#include "buffer.h" 17898937Sdes 17998937Sdes#ifdef HAVE_UTIL_H 180147005Sdes# include <util.h> 18198937Sdes#endif 18298937Sdes 18398937Sdes/** 18498937Sdes ** prototypes for helper functions in this file 18598937Sdes **/ 18698937Sdes 18798937Sdes#if HAVE_UTMP_H 18898937Sdesvoid set_utmp_time(struct logininfo *li, struct utmp *ut); 18998937Sdesvoid construct_utmp(struct logininfo *li, struct utmp *ut); 19098937Sdes#endif 19198937Sdes 19298937Sdes#ifdef HAVE_UTMPX_H 19398937Sdesvoid set_utmpx_time(struct logininfo *li, struct utmpx *ut); 19498937Sdesvoid construct_utmpx(struct logininfo *li, struct utmpx *ut); 19598937Sdes#endif 19698937Sdes 19798937Sdesint utmp_write_entry(struct logininfo *li); 19898937Sdesint utmpx_write_entry(struct logininfo *li); 19998937Sdesint wtmp_write_entry(struct logininfo *li); 20098937Sdesint wtmpx_write_entry(struct logininfo *li); 20198937Sdesint lastlog_write_entry(struct logininfo *li); 20298937Sdesint syslogin_write_entry(struct logininfo *li); 20398937Sdes 20498937Sdesint getlast_entry(struct logininfo *li); 20598937Sdesint lastlog_get_entry(struct logininfo *li); 206202213Sedint utmpx_get_entry(struct logininfo *li); 20798937Sdesint wtmp_get_entry(struct logininfo *li); 20898937Sdesint wtmpx_get_entry(struct logininfo *li); 20998937Sdes 210147005Sdesextern Buffer loginmsg; 211147005Sdes 21298937Sdes/* pick the shortest string */ 213147005Sdes#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) 21498937Sdes 21598937Sdes/** 21698937Sdes ** platform-independent login functions 21798937Sdes **/ 21898937Sdes 219147005Sdes/* 220147005Sdes * login_login(struct logininfo *) - Record a login 22198937Sdes * 22298937Sdes * Call with a pointer to a struct logininfo initialised with 22398937Sdes * login_init_entry() or login_alloc_entry() 22498937Sdes * 22598937Sdes * Returns: 22698937Sdes * >0 if successful 22798937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 22898937Sdes */ 22998937Sdesint 230147005Sdeslogin_login(struct logininfo *li) 23198937Sdes{ 23298937Sdes li->type = LTYPE_LOGIN; 233147005Sdes return (login_write(li)); 23498937Sdes} 23598937Sdes 23698937Sdes 237147005Sdes/* 238147005Sdes * login_logout(struct logininfo *) - Record a logout 23998937Sdes * 24098937Sdes * Call as with login_login() 24198937Sdes * 24298937Sdes * Returns: 24398937Sdes * >0 if successful 24498937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 24598937Sdes */ 24698937Sdesint 24798937Sdeslogin_logout(struct logininfo *li) 24898937Sdes{ 24998937Sdes li->type = LTYPE_LOGOUT; 250147005Sdes return (login_write(li)); 25198937Sdes} 25298937Sdes 253147005Sdes/* 254147005Sdes * login_get_lastlog_time(int) - Retrieve the last login time 25598937Sdes * 25698937Sdes * Retrieve the last login time for the given uid. Will try to use the 25798937Sdes * system lastlog facilities if they are available, but will fall back 25898937Sdes * to looking in wtmp/wtmpx if necessary 25998937Sdes * 26098937Sdes * Returns: 26198937Sdes * 0 on failure, or if user has never logged in 26298937Sdes * Time in seconds from the epoch if successful 26398937Sdes * 26498937Sdes * Useful preprocessor symbols: 26598937Sdes * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog 26698937Sdes * info 26798937Sdes * USE_LASTLOG: If set, indicates the presence of system lastlog 26898937Sdes * facilities. If this and DISABLE_LASTLOG are not set, 26998937Sdes * try to retrieve lastlog information from wtmp/wtmpx. 27098937Sdes */ 27198937Sdesunsigned int 272221420Sdeslogin_get_lastlog_time(const uid_t uid) 27398937Sdes{ 27498937Sdes struct logininfo li; 27598937Sdes 27698937Sdes if (login_get_lastlog(&li, uid)) 277147005Sdes return (li.tv_sec); 27898937Sdes else 279147005Sdes return (0); 28098937Sdes} 28198937Sdes 282147005Sdes/* 283147005Sdes * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry 28498937Sdes * 28598937Sdes * Retrieve a logininfo structure populated (only partially) with 28698937Sdes * information from the system lastlog data, or from wtmp/wtmpx if no 28798937Sdes * system lastlog information exists. 28898937Sdes * 28998937Sdes * Note this routine must be given a pre-allocated logininfo. 29098937Sdes * 29198937Sdes * Returns: 29298937Sdes * >0: A pointer to your struct logininfo if successful 29398937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 29498937Sdes */ 29598937Sdesstruct logininfo * 296221420Sdeslogin_get_lastlog(struct logininfo *li, const uid_t uid) 29798937Sdes{ 29898937Sdes struct passwd *pw; 29998937Sdes 30098937Sdes memset(li, '\0', sizeof(*li)); 30198937Sdes li->uid = uid; 30298937Sdes 30398937Sdes /* 30498937Sdes * If we don't have a 'real' lastlog, we need the username to 30598937Sdes * reliably search wtmp(x) for the last login (see 30698937Sdes * wtmp_get_entry().) 30798937Sdes */ 30898937Sdes pw = getpwuid(uid); 30998937Sdes if (pw == NULL) 310221420Sdes fatal("%s: Cannot find account for uid %ld", __func__, 311221420Sdes (long)uid); 31298937Sdes 31398937Sdes /* No MIN_SIZEOF here - we absolutely *must not* truncate the 314147005Sdes * username (XXX - so check for trunc!) */ 31598937Sdes strlcpy(li->username, pw->pw_name, sizeof(li->username)); 31698937Sdes 31798937Sdes if (getlast_entry(li)) 318147005Sdes return (li); 31998937Sdes else 320147005Sdes return (NULL); 32198937Sdes} 32298937Sdes 32398937Sdes 324147005Sdes/* 325147005Sdes * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise 32698937Sdes * a logininfo structure 32798937Sdes * 32898937Sdes * This function creates a new struct logininfo, a data structure 32998937Sdes * meant to carry the information required to portably record login info. 33098937Sdes * 33198937Sdes * Returns a pointer to a newly created struct logininfo. If memory 33298937Sdes * allocation fails, the program halts. 33398937Sdes */ 33498937Sdesstruct 335221420Sdeslogininfo *login_alloc_entry(pid_t pid, const char *username, 336147005Sdes const char *hostname, const char *line) 33798937Sdes{ 33898937Sdes struct logininfo *newli; 33998937Sdes 340147005Sdes newli = xmalloc(sizeof(*newli)); 341147005Sdes login_init_entry(newli, pid, username, hostname, line); 342147005Sdes return (newli); 34398937Sdes} 34498937Sdes 34598937Sdes 34698937Sdes/* login_free_entry(struct logininfo *) - free struct memory */ 34798937Sdesvoid 34898937Sdeslogin_free_entry(struct logininfo *li) 34998937Sdes{ 350255767Sdes free(li); 35198937Sdes} 35298937Sdes 35398937Sdes 35498937Sdes/* login_init_entry(struct logininfo *, int, char*, char*, char*) 35598937Sdes * - initialise a struct logininfo 35698937Sdes * 35798937Sdes * Populates a new struct logininfo, a data structure meant to carry 35898937Sdes * the information required to portably record login info. 35998937Sdes * 36098937Sdes * Returns: 1 36198937Sdes */ 36298937Sdesint 363221420Sdeslogin_init_entry(struct logininfo *li, pid_t pid, const char *username, 364147005Sdes const char *hostname, const char *line) 36598937Sdes{ 36698937Sdes struct passwd *pw; 36798937Sdes 36898937Sdes memset(li, 0, sizeof(*li)); 36998937Sdes 37098937Sdes li->pid = pid; 37198937Sdes 37298937Sdes /* set the line information */ 37398937Sdes if (line) 37498937Sdes line_fullname(li->line, line, sizeof(li->line)); 37598937Sdes 37698937Sdes if (username) { 37798937Sdes strlcpy(li->username, username, sizeof(li->username)); 37898937Sdes pw = getpwnam(li->username); 379147005Sdes if (pw == NULL) { 380149753Sdes fatal("%s: Cannot find user \"%s\"", __func__, 381147005Sdes li->username); 382147005Sdes } 38398937Sdes li->uid = pw->pw_uid; 38498937Sdes } 38598937Sdes 38698937Sdes if (hostname) 38798937Sdes strlcpy(li->hostname, hostname, sizeof(li->hostname)); 38898937Sdes 389147005Sdes return (1); 39098937Sdes} 39198937Sdes 392149753Sdes/* 393147005Sdes * login_set_current_time(struct logininfo *) - set the current time 39498937Sdes * 39598937Sdes * Set the current time in a logininfo structure. This function is 39698937Sdes * meant to eliminate the need to deal with system dependencies for 39798937Sdes * time handling. 39898937Sdes */ 39998937Sdesvoid 40098937Sdeslogin_set_current_time(struct logininfo *li) 40198937Sdes{ 40298937Sdes struct timeval tv; 40398937Sdes 40498937Sdes gettimeofday(&tv, NULL); 40598937Sdes 40698937Sdes li->tv_sec = tv.tv_sec; 40798937Sdes li->tv_usec = tv.tv_usec; 40898937Sdes} 40998937Sdes 41098937Sdes/* copy a sockaddr_* into our logininfo */ 41198937Sdesvoid 41298937Sdeslogin_set_addr(struct logininfo *li, const struct sockaddr *sa, 413147005Sdes const unsigned int sa_size) 41498937Sdes{ 41598937Sdes unsigned int bufsize = sa_size; 41698937Sdes 41798937Sdes /* make sure we don't overrun our union */ 41898937Sdes if (sizeof(li->hostaddr) < sa_size) 41998937Sdes bufsize = sizeof(li->hostaddr); 42098937Sdes 421147005Sdes memcpy(&li->hostaddr.sa, sa, bufsize); 42298937Sdes} 42398937Sdes 42498937Sdes 42598937Sdes/** 42698937Sdes ** login_write: Call low-level recording functions based on autoconf 42798937Sdes ** results 42898937Sdes **/ 42998937Sdesint 430147005Sdeslogin_write(struct logininfo *li) 43198937Sdes{ 43298937Sdes#ifndef HAVE_CYGWIN 433147005Sdes if (geteuid() != 0) { 434147005Sdes logit("Attempt to write login records by non-root user (aborting)"); 435147005Sdes return (1); 43698937Sdes } 43798937Sdes#endif 43898937Sdes 43998937Sdes /* set the timestamp */ 44098937Sdes login_set_current_time(li); 44198937Sdes#ifdef USE_LOGIN 44298937Sdes syslogin_write_entry(li); 44398937Sdes#endif 44498937Sdes#ifdef USE_LASTLOG 445147005Sdes if (li->type == LTYPE_LOGIN) 44698937Sdes lastlog_write_entry(li); 44798937Sdes#endif 44898937Sdes#ifdef USE_UTMP 44998937Sdes utmp_write_entry(li); 45098937Sdes#endif 45198937Sdes#ifdef USE_WTMP 45298937Sdes wtmp_write_entry(li); 45398937Sdes#endif 45498937Sdes#ifdef USE_UTMPX 45598937Sdes utmpx_write_entry(li); 45698937Sdes#endif 45798937Sdes#ifdef USE_WTMPX 45898937Sdes wtmpx_write_entry(li); 45998937Sdes#endif 460137019Sdes#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN 461149753Sdes if (li->type == LTYPE_LOGIN && 462149753Sdes !sys_auth_record_login(li->username,li->hostname,li->line, 463149753Sdes &loginmsg)) 464137019Sdes logit("Writing login record failed for %s", li->username); 465137019Sdes#endif 466147005Sdes#ifdef SSH_AUDIT_EVENTS 467147005Sdes if (li->type == LTYPE_LOGIN) 468221420Sdes audit_session_open(li); 469147005Sdes else if (li->type == LTYPE_LOGOUT) 470221420Sdes audit_session_close(li); 471147005Sdes#endif 472147005Sdes return (0); 47398937Sdes} 47498937Sdes 47598937Sdes#ifdef LOGIN_NEEDS_UTMPX 47698937Sdesint 47798937Sdeslogin_utmp_only(struct logininfo *li) 47898937Sdes{ 479126277Sdes li->type = LTYPE_LOGIN; 48098937Sdes login_set_current_time(li); 48198937Sdes# ifdef USE_UTMP 48298937Sdes utmp_write_entry(li); 48398937Sdes# endif 48498937Sdes# ifdef USE_WTMP 48598937Sdes wtmp_write_entry(li); 48698937Sdes# endif 48798937Sdes# ifdef USE_UTMPX 48898937Sdes utmpx_write_entry(li); 48998937Sdes# endif 49098937Sdes# ifdef USE_WTMPX 49198937Sdes wtmpx_write_entry(li); 49298937Sdes# endif 493147005Sdes return (0); 49498937Sdes} 49598937Sdes#endif 49698937Sdes 49798937Sdes/** 49898937Sdes ** getlast_entry: Call low-level functions to retrieve the last login 49998937Sdes ** time. 50098937Sdes **/ 50198937Sdes 50298937Sdes/* take the uid in li and return the last login time */ 50398937Sdesint 50498937Sdesgetlast_entry(struct logininfo *li) 50598937Sdes{ 50698937Sdes#ifdef USE_LASTLOG 50798937Sdes return(lastlog_get_entry(li)); 50898937Sdes#else /* !USE_LASTLOG */ 509207319Sdes#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \ 510207319Sdes defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER) 511207319Sdes return (utmpx_get_entry(li)); 512207319Sdes#endif 51398937Sdes 514147005Sdes#if defined(DISABLE_LASTLOG) 51598937Sdes /* On some systems we shouldn't even try to obtain last login 51698937Sdes * time, e.g. AIX */ 517147005Sdes return (0); 518147005Sdes# elif defined(USE_WTMP) && \ 519147005Sdes (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) 52098937Sdes /* retrieve last login time from utmp */ 52198937Sdes return (wtmp_get_entry(li)); 522147005Sdes# elif defined(USE_WTMPX) && \ 523147005Sdes (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) 52498937Sdes /* If wtmp isn't available, try wtmpx */ 52598937Sdes return (wtmpx_get_entry(li)); 526147005Sdes# else 52798937Sdes /* Give up: No means of retrieving last login time */ 528147005Sdes return (0); 52998937Sdes# endif /* DISABLE_LASTLOG */ 53098937Sdes#endif /* USE_LASTLOG */ 53198937Sdes} 53298937Sdes 53398937Sdes 53498937Sdes 53598937Sdes/* 53698937Sdes * 'line' string utility functions 53798937Sdes * 53898937Sdes * These functions process the 'line' string into one of three forms: 53998937Sdes * 54098937Sdes * 1. The full filename (including '/dev') 54198937Sdes * 2. The stripped name (excluding '/dev') 54298937Sdes * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 54398937Sdes * /dev/pts/1 -> ts/1 ) 54498937Sdes * 54598937Sdes * Form 3 is used on some systems to identify a .tmp.? entry when 54698937Sdes * attempting to remove it. Typically both addition and removal is 54798937Sdes * performed by one application - say, sshd - so as long as the choice 54898937Sdes * uniquely identifies a terminal it's ok. 54998937Sdes */ 55098937Sdes 55198937Sdes 552147005Sdes/* 553147005Sdes * line_fullname(): add the leading '/dev/' if it doesn't exist make 554147005Sdes * sure dst has enough space, if not just copy src (ugh) 555147005Sdes */ 55698937Sdeschar * 557149753Sdesline_fullname(char *dst, const char *src, u_int dstsize) 55898937Sdes{ 55998937Sdes memset(dst, '\0', dstsize); 560147005Sdes if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) 56198937Sdes strlcpy(dst, src, dstsize); 562147005Sdes else { 56398937Sdes strlcpy(dst, "/dev/", dstsize); 56498937Sdes strlcat(dst, src, dstsize); 56598937Sdes } 566147005Sdes return (dst); 56798937Sdes} 56898937Sdes 56998937Sdes/* line_stripname(): strip the leading '/dev' if it exists, return dst */ 57098937Sdeschar * 57198937Sdesline_stripname(char *dst, const char *src, int dstsize) 57298937Sdes{ 57398937Sdes memset(dst, '\0', dstsize); 57498937Sdes if (strncmp(src, "/dev/", 5) == 0) 57598937Sdes strlcpy(dst, src + 5, dstsize); 57698937Sdes else 57798937Sdes strlcpy(dst, src, dstsize); 578147005Sdes return (dst); 57998937Sdes} 58098937Sdes 581149753Sdes/* 582147005Sdes * line_abbrevname(): Return the abbreviated (usually four-character) 58398937Sdes * form of the line (Just use the last <dstsize> characters of the 58498937Sdes * full name.) 58598937Sdes * 58698937Sdes * NOTE: use strncpy because we do NOT necessarily want zero 587147005Sdes * termination 588147005Sdes */ 58998937Sdeschar * 59098937Sdesline_abbrevname(char *dst, const char *src, int dstsize) 59198937Sdes{ 59298937Sdes size_t len; 59398937Sdes 59498937Sdes memset(dst, '\0', dstsize); 59598937Sdes 59698937Sdes /* Always skip prefix if present */ 59798937Sdes if (strncmp(src, "/dev/", 5) == 0) 59898937Sdes src += 5; 59998937Sdes 60098937Sdes#ifdef WITH_ABBREV_NO_TTY 60198937Sdes if (strncmp(src, "tty", 3) == 0) 60298937Sdes src += 3; 60398937Sdes#endif 60498937Sdes 60598937Sdes len = strlen(src); 60698937Sdes 60798937Sdes if (len > 0) { 60898937Sdes if (((int)len - dstsize) > 0) 60998937Sdes src += ((int)len - dstsize); 61098937Sdes 61198937Sdes /* note: _don't_ change this to strlcpy */ 61298937Sdes strncpy(dst, src, (size_t)dstsize); 61398937Sdes } 61498937Sdes 615147005Sdes return (dst); 61698937Sdes} 61798937Sdes 61898937Sdes/** 61998937Sdes ** utmp utility functions 62098937Sdes ** 62198937Sdes ** These functions manipulate struct utmp, taking system differences 62298937Sdes ** into account. 62398937Sdes **/ 62498937Sdes 62598937Sdes#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) 62698937Sdes 62798937Sdes/* build the utmp structure */ 62898937Sdesvoid 62998937Sdesset_utmp_time(struct logininfo *li, struct utmp *ut) 63098937Sdes{ 631147005Sdes# if defined(HAVE_TV_IN_UTMP) 63298937Sdes ut->ut_tv.tv_sec = li->tv_sec; 63398937Sdes ut->ut_tv.tv_usec = li->tv_usec; 634147005Sdes# elif defined(HAVE_TIME_IN_UTMP) 63598937Sdes ut->ut_time = li->tv_sec; 63698937Sdes# endif 63798937Sdes} 63898937Sdes 63998937Sdesvoid 64098937Sdesconstruct_utmp(struct logininfo *li, 64198937Sdes struct utmp *ut) 64298937Sdes{ 643113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 644113911Sdes struct sockaddr_in6 *sa6; 645147005Sdes# endif 646147005Sdes 64798937Sdes memset(ut, '\0', sizeof(*ut)); 64898937Sdes 64998937Sdes /* First fill out fields used for both logins and logouts */ 65098937Sdes 65198937Sdes# ifdef HAVE_ID_IN_UTMP 65298937Sdes line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); 65398937Sdes# endif 65498937Sdes 65598937Sdes# ifdef HAVE_TYPE_IN_UTMP 65698937Sdes /* This is done here to keep utmp constants out of struct logininfo */ 65798937Sdes switch (li->type) { 65898937Sdes case LTYPE_LOGIN: 65998937Sdes ut->ut_type = USER_PROCESS; 660106130Sdes#ifdef _UNICOS 66198937Sdes cray_set_tmpdir(ut); 66298937Sdes#endif 66398937Sdes break; 66498937Sdes case LTYPE_LOGOUT: 66598937Sdes ut->ut_type = DEAD_PROCESS; 666106130Sdes#ifdef _UNICOS 66798937Sdes cray_retain_utmp(ut, li->pid); 66898937Sdes#endif 66998937Sdes break; 67098937Sdes } 67198937Sdes# endif 67298937Sdes set_utmp_time(li, ut); 67398937Sdes 67498937Sdes line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); 67598937Sdes 67698937Sdes# ifdef HAVE_PID_IN_UTMP 67798937Sdes ut->ut_pid = li->pid; 67898937Sdes# endif 67998937Sdes 68098937Sdes /* If we're logging out, leave all other fields blank */ 68198937Sdes if (li->type == LTYPE_LOGOUT) 682147005Sdes return; 68398937Sdes 68498937Sdes /* 68598937Sdes * These fields are only used when logging in, and are blank 68698937Sdes * for logouts. 68798937Sdes */ 68898937Sdes 68998937Sdes /* Use strncpy because we don't necessarily want null termination */ 690147005Sdes strncpy(ut->ut_name, li->username, 691147005Sdes MIN_SIZEOF(ut->ut_name, li->username)); 69298937Sdes# ifdef HAVE_HOST_IN_UTMP 693184122Sdes strncpy(ut->ut_host, li->hostname, 694184122Sdes MIN_SIZEOF(ut->ut_host, li->hostname)); 69598937Sdes# endif 69698937Sdes# ifdef HAVE_ADDR_IN_UTMP 69798937Sdes /* this is just a 32-bit IP address */ 69898937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 69998937Sdes ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 70098937Sdes# endif 701113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 702113911Sdes /* this is just a 128-bit IPv6 address */ 703113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 704113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 705113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 706113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 707113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 708113911Sdes ut->ut_addr_v6[1] = 0; 709113911Sdes ut->ut_addr_v6[2] = 0; 710113911Sdes ut->ut_addr_v6[3] = 0; 711113911Sdes } 712113911Sdes } 713113911Sdes# endif 71498937Sdes} 71598937Sdes#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ 71698937Sdes 71798937Sdes/** 71898937Sdes ** utmpx utility functions 71998937Sdes ** 72098937Sdes ** These functions manipulate struct utmpx, accounting for system 72198937Sdes ** variations. 72298937Sdes **/ 72398937Sdes 72498937Sdes#if defined(USE_UTMPX) || defined (USE_WTMPX) 72598937Sdes/* build the utmpx structure */ 72698937Sdesvoid 72798937Sdesset_utmpx_time(struct logininfo *li, struct utmpx *utx) 72898937Sdes{ 729147005Sdes# if defined(HAVE_TV_IN_UTMPX) 73098937Sdes utx->ut_tv.tv_sec = li->tv_sec; 73198937Sdes utx->ut_tv.tv_usec = li->tv_usec; 732147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 73398937Sdes utx->ut_time = li->tv_sec; 734147005Sdes# endif 73598937Sdes} 73698937Sdes 73798937Sdesvoid 73898937Sdesconstruct_utmpx(struct logininfo *li, struct utmpx *utx) 73998937Sdes{ 740113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 741113911Sdes struct sockaddr_in6 *sa6; 742113911Sdes# endif 74398937Sdes memset(utx, '\0', sizeof(*utx)); 744147005Sdes 74598937Sdes# ifdef HAVE_ID_IN_UTMPX 74698937Sdes line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); 74798937Sdes# endif 74898937Sdes 74998937Sdes /* this is done here to keep utmp constants out of loginrec.h */ 75098937Sdes switch (li->type) { 75198937Sdes case LTYPE_LOGIN: 75298937Sdes utx->ut_type = USER_PROCESS; 75398937Sdes break; 75498937Sdes case LTYPE_LOGOUT: 75598937Sdes utx->ut_type = DEAD_PROCESS; 75698937Sdes break; 75798937Sdes } 75898937Sdes line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); 75998937Sdes set_utmpx_time(li, utx); 76098937Sdes utx->ut_pid = li->pid; 761147005Sdes 76298937Sdes /* strncpy(): Don't necessarily want null termination */ 763202213Sed strncpy(utx->ut_user, li->username, 764202213Sed MIN_SIZEOF(utx->ut_user, li->username)); 76598937Sdes 76698937Sdes if (li->type == LTYPE_LOGOUT) 76798937Sdes return; 76898937Sdes 76998937Sdes /* 77098937Sdes * These fields are only used when logging in, and are blank 77198937Sdes * for logouts. 77298937Sdes */ 77398937Sdes 77498937Sdes# ifdef HAVE_HOST_IN_UTMPX 775147005Sdes strncpy(utx->ut_host, li->hostname, 776147005Sdes MIN_SIZEOF(utx->ut_host, li->hostname)); 77798937Sdes# endif 77898937Sdes# ifdef HAVE_ADDR_IN_UTMPX 77998937Sdes /* this is just a 32-bit IP address */ 78098937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 78198937Sdes utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 78298937Sdes# endif 783113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 784113911Sdes /* this is just a 128-bit IPv6 address */ 785113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 786113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 787113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 788113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 789113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 790113911Sdes ut->ut_addr_v6[1] = 0; 791113911Sdes ut->ut_addr_v6[2] = 0; 792113911Sdes ut->ut_addr_v6[3] = 0; 793113911Sdes } 794113911Sdes } 795113911Sdes# endif 79698937Sdes# ifdef HAVE_SYSLEN_IN_UTMPX 79798937Sdes /* ut_syslen is the length of the utx_host string */ 79898937Sdes utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); 79998937Sdes# endif 80098937Sdes} 80198937Sdes#endif /* USE_UTMPX || USE_WTMPX */ 80298937Sdes 80398937Sdes/** 80498937Sdes ** Low-level utmp functions 80598937Sdes **/ 80698937Sdes 80798937Sdes/* FIXME: (ATL) utmp_write_direct needs testing */ 80898937Sdes#ifdef USE_UTMP 80998937Sdes 81098937Sdes/* if we can, use pututline() etc. */ 81198937Sdes# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ 81298937Sdes defined(HAVE_PUTUTLINE) 81398937Sdes# define UTMP_USE_LIBRARY 81498937Sdes# endif 81598937Sdes 81698937Sdes 81798937Sdes/* write a utmp entry with the system's help (pututline() and pals) */ 81898937Sdes# ifdef UTMP_USE_LIBRARY 81998937Sdesstatic int 82098937Sdesutmp_write_library(struct logininfo *li, struct utmp *ut) 82198937Sdes{ 82298937Sdes setutent(); 82398937Sdes pututline(ut); 82498937Sdes# ifdef HAVE_ENDUTENT 82598937Sdes endutent(); 82698937Sdes# endif 827147005Sdes return (1); 82898937Sdes} 82998937Sdes# else /* UTMP_USE_LIBRARY */ 83098937Sdes 831149753Sdes/* 832147005Sdes * Write a utmp entry direct to the file 833147005Sdes * This is a slightly modification of code in OpenBSD's login.c 834147005Sdes */ 83598937Sdesstatic int 83698937Sdesutmp_write_direct(struct logininfo *li, struct utmp *ut) 83798937Sdes{ 83898937Sdes struct utmp old_ut; 83998937Sdes register int fd; 84098937Sdes int tty; 84198937Sdes 84298937Sdes /* FIXME: (ATL) ttyslot() needs local implementation */ 84398937Sdes 84498937Sdes#if defined(HAVE_GETTTYENT) 845147005Sdes struct ttyent *ty; 84698937Sdes 84798937Sdes tty=0; 84898937Sdes setttyent(); 849147005Sdes while (NULL != (ty = getttyent())) { 85098937Sdes tty++; 85198937Sdes if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) 85298937Sdes break; 85398937Sdes } 85498937Sdes endttyent(); 85598937Sdes 856147005Sdes if (NULL == ty) { 857137019Sdes logit("%s: tty not found", __func__); 858137019Sdes return (0); 85998937Sdes } 86098937Sdes#else /* FIXME */ 86198937Sdes 86298937Sdes tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ 86398937Sdes 86498937Sdes#endif /* HAVE_GETTTYENT */ 86598937Sdes 86698937Sdes if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { 867137019Sdes off_t pos, ret; 868137019Sdes 869137019Sdes pos = (off_t)tty * sizeof(struct utmp); 870137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 871147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 872221420Sdes close(fd); 873137019Sdes return (0); 874137019Sdes } 875137019Sdes if (ret != pos) { 876149753Sdes logit("%s: Couldn't seek to tty %d slot in %s", 877147005Sdes __func__, tty, UTMP_FILE); 878221420Sdes close(fd); 879137019Sdes return (0); 880137019Sdes } 88198937Sdes /* 88298937Sdes * Prevent luser from zero'ing out ut_host. 88398937Sdes * If the new ut_line is empty but the old one is not 88498937Sdes * and ut_line and ut_name match, preserve the old ut_line. 88598937Sdes */ 88698937Sdes if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && 887147005Sdes (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && 888147005Sdes (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && 889147005Sdes (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) 890147005Sdes memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); 89198937Sdes 892137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 893147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 894221420Sdes close(fd); 895137019Sdes return (0); 896137019Sdes } 897137019Sdes if (ret != pos) { 898147005Sdes logit("%s: Couldn't seek to tty %d slot in %s", 899137019Sdes __func__, tty, UTMP_FILE); 900221420Sdes close(fd); 901137019Sdes return (0); 902137019Sdes } 903147005Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 904137019Sdes logit("%s: error writing %s: %s", __func__, 90598937Sdes UTMP_FILE, strerror(errno)); 906221420Sdes close(fd); 907221420Sdes return (0); 908147005Sdes } 90998937Sdes 910147005Sdes close(fd); 911147005Sdes return (1); 91298937Sdes } else { 913147005Sdes return (0); 91498937Sdes } 91598937Sdes} 91698937Sdes# endif /* UTMP_USE_LIBRARY */ 91798937Sdes 91898937Sdesstatic int 91998937Sdesutmp_perform_login(struct logininfo *li) 92098937Sdes{ 92198937Sdes struct utmp ut; 92298937Sdes 92398937Sdes construct_utmp(li, &ut); 92498937Sdes# ifdef UTMP_USE_LIBRARY 92598937Sdes if (!utmp_write_library(li, &ut)) { 926147005Sdes logit("%s: utmp_write_library() failed", __func__); 927147005Sdes return (0); 92898937Sdes } 92998937Sdes# else 93098937Sdes if (!utmp_write_direct(li, &ut)) { 931147005Sdes logit("%s: utmp_write_direct() failed", __func__); 932147005Sdes return (0); 93398937Sdes } 93498937Sdes# endif 935147005Sdes return (1); 93698937Sdes} 93798937Sdes 93898937Sdes 93998937Sdesstatic int 94098937Sdesutmp_perform_logout(struct logininfo *li) 94198937Sdes{ 94298937Sdes struct utmp ut; 94398937Sdes 94498937Sdes construct_utmp(li, &ut); 94598937Sdes# ifdef UTMP_USE_LIBRARY 94698937Sdes if (!utmp_write_library(li, &ut)) { 947147005Sdes logit("%s: utmp_write_library() failed", __func__); 948147005Sdes return (0); 94998937Sdes } 95098937Sdes# else 95198937Sdes if (!utmp_write_direct(li, &ut)) { 952147005Sdes logit("%s: utmp_write_direct() failed", __func__); 953147005Sdes return (0); 95498937Sdes } 95598937Sdes# endif 956147005Sdes return (1); 95798937Sdes} 95898937Sdes 95998937Sdes 96098937Sdesint 96198937Sdesutmp_write_entry(struct logininfo *li) 96298937Sdes{ 96398937Sdes switch(li->type) { 96498937Sdes case LTYPE_LOGIN: 965147005Sdes return (utmp_perform_login(li)); 96698937Sdes 96798937Sdes case LTYPE_LOGOUT: 968147005Sdes return (utmp_perform_logout(li)); 96998937Sdes 97098937Sdes default: 971147005Sdes logit("%s: invalid type field", __func__); 972147005Sdes return (0); 97398937Sdes } 97498937Sdes} 97598937Sdes#endif /* USE_UTMP */ 97698937Sdes 97798937Sdes 97898937Sdes/** 97998937Sdes ** Low-level utmpx functions 98098937Sdes **/ 98198937Sdes 98298937Sdes/* not much point if we don't want utmpx entries */ 98398937Sdes#ifdef USE_UTMPX 98498937Sdes 98598937Sdes/* if we have the wherewithall, use pututxline etc. */ 98698937Sdes# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ 98798937Sdes defined(HAVE_PUTUTXLINE) 98898937Sdes# define UTMPX_USE_LIBRARY 98998937Sdes# endif 99098937Sdes 99198937Sdes 99298937Sdes/* write a utmpx entry with the system's help (pututxline() and pals) */ 99398937Sdes# ifdef UTMPX_USE_LIBRARY 99498937Sdesstatic int 99598937Sdesutmpx_write_library(struct logininfo *li, struct utmpx *utx) 99698937Sdes{ 99798937Sdes setutxent(); 99898937Sdes pututxline(utx); 99998937Sdes 100098937Sdes# ifdef HAVE_ENDUTXENT 100198937Sdes endutxent(); 100298937Sdes# endif 1003147005Sdes return (1); 100498937Sdes} 100598937Sdes 100698937Sdes# else /* UTMPX_USE_LIBRARY */ 100798937Sdes 100898937Sdes/* write a utmp entry direct to the file */ 100998937Sdesstatic int 101098937Sdesutmpx_write_direct(struct logininfo *li, struct utmpx *utx) 101198937Sdes{ 1012147005Sdes logit("%s: not implemented!", __func__); 1013147005Sdes return (0); 101498937Sdes} 101598937Sdes# endif /* UTMPX_USE_LIBRARY */ 101698937Sdes 101798937Sdesstatic int 101898937Sdesutmpx_perform_login(struct logininfo *li) 101998937Sdes{ 102098937Sdes struct utmpx utx; 102198937Sdes 102298937Sdes construct_utmpx(li, &utx); 102398937Sdes# ifdef UTMPX_USE_LIBRARY 102498937Sdes if (!utmpx_write_library(li, &utx)) { 1025147005Sdes logit("%s: utmp_write_library() failed", __func__); 1026147005Sdes return (0); 102798937Sdes } 102898937Sdes# else 102998937Sdes if (!utmpx_write_direct(li, &ut)) { 1030147005Sdes logit("%s: utmp_write_direct() failed", __func__); 1031147005Sdes return (0); 103298937Sdes } 103398937Sdes# endif 1034147005Sdes return (1); 103598937Sdes} 103698937Sdes 103798937Sdes 103898937Sdesstatic int 103998937Sdesutmpx_perform_logout(struct logininfo *li) 104098937Sdes{ 104198937Sdes struct utmpx utx; 104298937Sdes 104398937Sdes construct_utmpx(li, &utx); 104498937Sdes# ifdef HAVE_ID_IN_UTMPX 104598937Sdes line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); 104698937Sdes# endif 104798937Sdes# ifdef HAVE_TYPE_IN_UTMPX 104898937Sdes utx.ut_type = DEAD_PROCESS; 104998937Sdes# endif 105098937Sdes 105198937Sdes# ifdef UTMPX_USE_LIBRARY 105298937Sdes utmpx_write_library(li, &utx); 105398937Sdes# else 105498937Sdes utmpx_write_direct(li, &utx); 105598937Sdes# endif 1056147005Sdes return (1); 105798937Sdes} 105898937Sdes 105998937Sdesint 106098937Sdesutmpx_write_entry(struct logininfo *li) 106198937Sdes{ 106298937Sdes switch(li->type) { 106398937Sdes case LTYPE_LOGIN: 1064147005Sdes return (utmpx_perform_login(li)); 106598937Sdes case LTYPE_LOGOUT: 1066147005Sdes return (utmpx_perform_logout(li)); 106798937Sdes default: 1068147005Sdes logit("%s: invalid type field", __func__); 1069147005Sdes return (0); 107098937Sdes } 107198937Sdes} 107298937Sdes#endif /* USE_UTMPX */ 107398937Sdes 107498937Sdes 107598937Sdes/** 107698937Sdes ** Low-level wtmp functions 107798937Sdes **/ 107898937Sdes 107998937Sdes#ifdef USE_WTMP 108098937Sdes 1081149753Sdes/* 1082147005Sdes * Write a wtmp entry direct to the end of the file 1083147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1084147005Sdes */ 108598937Sdesstatic int 108698937Sdeswtmp_write(struct logininfo *li, struct utmp *ut) 108798937Sdes{ 108898937Sdes struct stat buf; 108998937Sdes int fd, ret = 1; 109098937Sdes 109198937Sdes if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1092147005Sdes logit("%s: problem writing %s: %s", __func__, 109398937Sdes WTMP_FILE, strerror(errno)); 1094147005Sdes return (0); 109598937Sdes } 109698937Sdes if (fstat(fd, &buf) == 0) 1097124211Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 109898937Sdes ftruncate(fd, buf.st_size); 1099147005Sdes logit("%s: problem writing %s: %s", __func__, 110098937Sdes WTMP_FILE, strerror(errno)); 110198937Sdes ret = 0; 110298937Sdes } 1103147005Sdes close(fd); 1104147005Sdes return (ret); 110598937Sdes} 110698937Sdes 110798937Sdesstatic int 110898937Sdeswtmp_perform_login(struct logininfo *li) 110998937Sdes{ 111098937Sdes struct utmp ut; 111198937Sdes 111298937Sdes construct_utmp(li, &ut); 1113147005Sdes return (wtmp_write(li, &ut)); 111498937Sdes} 111598937Sdes 111698937Sdes 111798937Sdesstatic int 111898937Sdeswtmp_perform_logout(struct logininfo *li) 111998937Sdes{ 112098937Sdes struct utmp ut; 112198937Sdes 112298937Sdes construct_utmp(li, &ut); 1123147005Sdes return (wtmp_write(li, &ut)); 112498937Sdes} 112598937Sdes 112698937Sdes 112798937Sdesint 112898937Sdeswtmp_write_entry(struct logininfo *li) 112998937Sdes{ 113098937Sdes switch(li->type) { 113198937Sdes case LTYPE_LOGIN: 1132147005Sdes return (wtmp_perform_login(li)); 113398937Sdes case LTYPE_LOGOUT: 1134147005Sdes return (wtmp_perform_logout(li)); 113598937Sdes default: 1136147005Sdes logit("%s: invalid type field", __func__); 1137147005Sdes return (0); 113898937Sdes } 113998937Sdes} 114098937Sdes 114198937Sdes 1142149753Sdes/* 1143147005Sdes * Notes on fetching login data from wtmp/wtmpx 114498937Sdes * 114598937Sdes * Logouts are usually recorded with (amongst other things) a blank 114698937Sdes * username on a given tty line. However, some systems (HP-UX is one) 114798937Sdes * leave all fields set, but change the ut_type field to DEAD_PROCESS. 114898937Sdes * 114998937Sdes * Since we're only looking for logins here, we know that the username 115098937Sdes * must be set correctly. On systems that leave it in, we check for 115198937Sdes * ut_type==USER_PROCESS (indicating a login.) 115298937Sdes * 115398937Sdes * Portability: Some systems may set something other than USER_PROCESS 115498937Sdes * to indicate a login process. I don't know of any as I write. Also, 115598937Sdes * it's possible that some systems may both leave the username in 115698937Sdes * place and not have ut_type. 115798937Sdes */ 115898937Sdes 115998937Sdes/* return true if this wtmp entry indicates a login */ 116098937Sdesstatic int 116198937Sdeswtmp_islogin(struct logininfo *li, struct utmp *ut) 116298937Sdes{ 116398937Sdes if (strncmp(li->username, ut->ut_name, 1164147005Sdes MIN_SIZEOF(li->username, ut->ut_name)) == 0) { 116598937Sdes# ifdef HAVE_TYPE_IN_UTMP 116698937Sdes if (ut->ut_type & USER_PROCESS) 1167147005Sdes return (1); 116898937Sdes# else 1169147005Sdes return (1); 117098937Sdes# endif 117198937Sdes } 1172147005Sdes return (0); 117398937Sdes} 117498937Sdes 117598937Sdesint 117698937Sdeswtmp_get_entry(struct logininfo *li) 117798937Sdes{ 117898937Sdes struct stat st; 117998937Sdes struct utmp ut; 1180147005Sdes int fd, found = 0; 118198937Sdes 118298937Sdes /* Clear the time entries in our logininfo */ 118398937Sdes li->tv_sec = li->tv_usec = 0; 118498937Sdes 118598937Sdes if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { 1186149753Sdes logit("%s: problem opening %s: %s", __func__, 118798937Sdes WTMP_FILE, strerror(errno)); 1188147005Sdes return (0); 118998937Sdes } 119098937Sdes if (fstat(fd, &st) != 0) { 1191149753Sdes logit("%s: couldn't stat %s: %s", __func__, 119298937Sdes WTMP_FILE, strerror(errno)); 119398937Sdes close(fd); 1194147005Sdes return (0); 119598937Sdes } 119698937Sdes 119798937Sdes /* Seek to the start of the last struct utmp */ 119898937Sdes if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { 119998937Sdes /* Looks like we've got a fresh wtmp file */ 120098937Sdes close(fd); 1201147005Sdes return (0); 120298937Sdes } 120398937Sdes 120498937Sdes while (!found) { 120598937Sdes if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { 1206149753Sdes logit("%s: read of %s failed: %s", __func__, 120798937Sdes WTMP_FILE, strerror(errno)); 120898937Sdes close (fd); 1209147005Sdes return (0); 121098937Sdes } 1211221420Sdes if (wtmp_islogin(li, &ut) ) { 121298937Sdes found = 1; 1213147005Sdes /* 1214147005Sdes * We've already checked for a time in struct 1215147005Sdes * utmp, in login_getlast() 1216147005Sdes */ 121798937Sdes# ifdef HAVE_TIME_IN_UTMP 121898937Sdes li->tv_sec = ut.ut_time; 121998937Sdes# else 122098937Sdes# if HAVE_TV_IN_UTMP 122198937Sdes li->tv_sec = ut.ut_tv.tv_sec; 122298937Sdes# endif 122398937Sdes# endif 122498937Sdes line_fullname(li->line, ut.ut_line, 1225147005Sdes MIN_SIZEOF(li->line, ut.ut_line)); 122698937Sdes# ifdef HAVE_HOST_IN_UTMP 122798937Sdes strlcpy(li->hostname, ut.ut_host, 1228147005Sdes MIN_SIZEOF(li->hostname, ut.ut_host)); 122998937Sdes# endif 123098937Sdes continue; 123198937Sdes } 123298937Sdes /* Seek back 2 x struct utmp */ 123398937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { 123498937Sdes /* We've found the start of the file, so quit */ 1235147005Sdes close(fd); 1236147005Sdes return (0); 123798937Sdes } 123898937Sdes } 123998937Sdes 124098937Sdes /* We found an entry. Tidy up and return */ 124198937Sdes close(fd); 1242147005Sdes return (1); 124398937Sdes} 124498937Sdes# endif /* USE_WTMP */ 124598937Sdes 124698937Sdes 124798937Sdes/** 124898937Sdes ** Low-level wtmpx functions 124998937Sdes **/ 125098937Sdes 125198937Sdes#ifdef USE_WTMPX 1252147005Sdes/* 1253147005Sdes * Write a wtmpx entry direct to the end of the file 1254147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1255147005Sdes */ 125698937Sdesstatic int 125798937Sdeswtmpx_write(struct logininfo *li, struct utmpx *utx) 125898937Sdes{ 1259126277Sdes#ifndef HAVE_UPDWTMPX 126098937Sdes struct stat buf; 126198937Sdes int fd, ret = 1; 126298937Sdes 126398937Sdes if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1264149753Sdes logit("%s: problem opening %s: %s", __func__, 126598937Sdes WTMPX_FILE, strerror(errno)); 1266147005Sdes return (0); 126798937Sdes } 126898937Sdes 126998937Sdes if (fstat(fd, &buf) == 0) 1270124211Sdes if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { 127198937Sdes ftruncate(fd, buf.st_size); 1272147005Sdes logit("%s: problem writing %s: %s", __func__, 127398937Sdes WTMPX_FILE, strerror(errno)); 127498937Sdes ret = 0; 127598937Sdes } 1276147005Sdes close(fd); 127798937Sdes 1278147005Sdes return (ret); 1279126277Sdes#else 1280126277Sdes updwtmpx(WTMPX_FILE, utx); 1281147005Sdes return (1); 1282126277Sdes#endif 128398937Sdes} 128498937Sdes 128598937Sdes 128698937Sdesstatic int 128798937Sdeswtmpx_perform_login(struct logininfo *li) 128898937Sdes{ 128998937Sdes struct utmpx utx; 129098937Sdes 129198937Sdes construct_utmpx(li, &utx); 1292147005Sdes return (wtmpx_write(li, &utx)); 129398937Sdes} 129498937Sdes 129598937Sdes 129698937Sdesstatic int 129798937Sdeswtmpx_perform_logout(struct logininfo *li) 129898937Sdes{ 129998937Sdes struct utmpx utx; 130098937Sdes 130198937Sdes construct_utmpx(li, &utx); 1302147005Sdes return (wtmpx_write(li, &utx)); 130398937Sdes} 130498937Sdes 130598937Sdes 130698937Sdesint 130798937Sdeswtmpx_write_entry(struct logininfo *li) 130898937Sdes{ 130998937Sdes switch(li->type) { 131098937Sdes case LTYPE_LOGIN: 1311147005Sdes return (wtmpx_perform_login(li)); 131298937Sdes case LTYPE_LOGOUT: 1313147005Sdes return (wtmpx_perform_logout(li)); 131498937Sdes default: 1315147005Sdes logit("%s: invalid type field", __func__); 1316147005Sdes return (0); 131798937Sdes } 131898937Sdes} 131998937Sdes 132098937Sdes/* Please see the notes above wtmp_islogin() for information about the 132198937Sdes next two functions */ 132298937Sdes 132398937Sdes/* Return true if this wtmpx entry indicates a login */ 132498937Sdesstatic int 132598937Sdeswtmpx_islogin(struct logininfo *li, struct utmpx *utx) 132698937Sdes{ 1327204917Sdes if (strncmp(li->username, utx->ut_user, 1328204917Sdes MIN_SIZEOF(li->username, utx->ut_user)) == 0 ) { 132998937Sdes# ifdef HAVE_TYPE_IN_UTMPX 133098937Sdes if (utx->ut_type == USER_PROCESS) 1331147005Sdes return (1); 133298937Sdes# else 1333147005Sdes return (1); 133498937Sdes# endif 133598937Sdes } 1336147005Sdes return (0); 133798937Sdes} 133898937Sdes 133998937Sdes 134098937Sdesint 134198937Sdeswtmpx_get_entry(struct logininfo *li) 134298937Sdes{ 134398937Sdes struct stat st; 134498937Sdes struct utmpx utx; 134598937Sdes int fd, found=0; 134698937Sdes 134798937Sdes /* Clear the time entries */ 134898937Sdes li->tv_sec = li->tv_usec = 0; 134998937Sdes 135098937Sdes if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { 1351149753Sdes logit("%s: problem opening %s: %s", __func__, 135298937Sdes WTMPX_FILE, strerror(errno)); 1353147005Sdes return (0); 135498937Sdes } 135598937Sdes if (fstat(fd, &st) != 0) { 1356149753Sdes logit("%s: couldn't stat %s: %s", __func__, 1357106130Sdes WTMPX_FILE, strerror(errno)); 135898937Sdes close(fd); 1359147005Sdes return (0); 136098937Sdes } 136198937Sdes 136298937Sdes /* Seek to the start of the last struct utmpx */ 136398937Sdes if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { 136498937Sdes /* probably a newly rotated wtmpx file */ 136598937Sdes close(fd); 1366147005Sdes return (0); 136798937Sdes } 136898937Sdes 136998937Sdes while (!found) { 137098937Sdes if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { 1371149753Sdes logit("%s: read of %s failed: %s", __func__, 137298937Sdes WTMPX_FILE, strerror(errno)); 137398937Sdes close (fd); 1374147005Sdes return (0); 137598937Sdes } 1376147005Sdes /* 1377149753Sdes * Logouts are recorded as a blank username on a particular 1378147005Sdes * line. So, we just need to find the username in struct utmpx 1379147005Sdes */ 1380147005Sdes if (wtmpx_islogin(li, &utx)) { 1381106130Sdes found = 1; 1382147005Sdes# if defined(HAVE_TV_IN_UTMPX) 138398937Sdes li->tv_sec = utx.ut_tv.tv_sec; 1384147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 138598937Sdes li->tv_sec = utx.ut_time; 138698937Sdes# endif 138798937Sdes line_fullname(li->line, utx.ut_line, sizeof(li->line)); 1388147005Sdes# if defined(HAVE_HOST_IN_UTMPX) 138998937Sdes strlcpy(li->hostname, utx.ut_host, 1390147005Sdes MIN_SIZEOF(li->hostname, utx.ut_host)); 139198937Sdes# endif 139298937Sdes continue; 139398937Sdes } 139498937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { 1395147005Sdes close(fd); 1396147005Sdes return (0); 139798937Sdes } 139898937Sdes } 139998937Sdes 140098937Sdes close(fd); 1401147005Sdes return (1); 140298937Sdes} 140398937Sdes#endif /* USE_WTMPX */ 140498937Sdes 140598937Sdes/** 140698937Sdes ** Low-level libutil login() functions 140798937Sdes **/ 140898937Sdes 140998937Sdes#ifdef USE_LOGIN 141098937Sdesstatic int 141198937Sdessyslogin_perform_login(struct logininfo *li) 141298937Sdes{ 141398937Sdes struct utmp *ut; 141498937Sdes 1415147005Sdes ut = xmalloc(sizeof(*ut)); 141698937Sdes construct_utmp(li, ut); 141798937Sdes login(ut); 1418113911Sdes free(ut); 141998937Sdes 1420147005Sdes return (1); 142198937Sdes} 142298937Sdes 142398937Sdesstatic int 142498937Sdessyslogin_perform_logout(struct logininfo *li) 142598937Sdes{ 142698937Sdes# ifdef HAVE_LOGOUT 1427128460Sdes char line[UT_LINESIZE]; 142898937Sdes 142998937Sdes (void)line_stripname(line, li->line, sizeof(line)); 143098937Sdes 1431147005Sdes if (!logout(line)) 1432147005Sdes logit("%s: logout() returned an error", __func__); 143398937Sdes# ifdef HAVE_LOGWTMP 1434147005Sdes else 143598937Sdes logwtmp(line, "", ""); 143698937Sdes# endif 143798937Sdes /* FIXME: (ATL - if the need arises) What to do if we have 143898937Sdes * login, but no logout? what if logout but no logwtmp? All 143998937Sdes * routines are in libutil so they should all be there, 144098937Sdes * but... */ 144198937Sdes# endif 1442147005Sdes return (1); 144398937Sdes} 144498937Sdes 144598937Sdesint 144698937Sdessyslogin_write_entry(struct logininfo *li) 144798937Sdes{ 144898937Sdes switch (li->type) { 144998937Sdes case LTYPE_LOGIN: 1450147005Sdes return (syslogin_perform_login(li)); 145198937Sdes case LTYPE_LOGOUT: 1452147005Sdes return (syslogin_perform_logout(li)); 145398937Sdes default: 1454147005Sdes logit("%s: Invalid type field", __func__); 1455147005Sdes return (0); 145698937Sdes } 145798937Sdes} 145898937Sdes#endif /* USE_LOGIN */ 145998937Sdes 146098937Sdes/* end of file log-syslogin.c */ 146198937Sdes 146298937Sdes/** 146398937Sdes ** Low-level lastlog functions 146498937Sdes **/ 146598937Sdes 146698937Sdes#ifdef USE_LASTLOG 146798937Sdes 1468192595Sdes#if !defined(LASTLOG_WRITE_PUTUTXLINE) || !defined(HAVE_GETLASTLOGXBYNAME) 1469192595Sdes/* open the file (using filemode) and seek to the login entry */ 147098937Sdesstatic int 1471192595Sdeslastlog_openseek(struct logininfo *li, int *fd, int filemode) 147298937Sdes{ 1473192595Sdes off_t offset; 1474192595Sdes char lastlog_file[1024]; 147598937Sdes struct stat st; 147698937Sdes 147798937Sdes if (stat(LASTLOG_FILE, &st) != 0) { 1478147005Sdes logit("%s: Couldn't stat %s: %s", __func__, 1479147005Sdes LASTLOG_FILE, strerror(errno)); 1480147005Sdes return (0); 148198937Sdes } 1482192595Sdes if (S_ISDIR(st.st_mode)) { 1483147005Sdes snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", 1484147005Sdes LASTLOG_FILE, li->username); 1485192595Sdes } else if (S_ISREG(st.st_mode)) { 1486192595Sdes strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file)); 1487192595Sdes } else { 1488147005Sdes logit("%s: %.100s is not a file or directory!", __func__, 1489147005Sdes LASTLOG_FILE); 1490147005Sdes return (0); 149198937Sdes } 149298937Sdes 1493124211Sdes *fd = open(lastlog_file, filemode, 0600); 1494147005Sdes if (*fd < 0) { 1495147005Sdes debug("%s: Couldn't open %s: %s", __func__, 149698937Sdes lastlog_file, strerror(errno)); 1497147005Sdes return (0); 149898937Sdes } 149998937Sdes 1500192595Sdes if (S_ISREG(st.st_mode)) { 150198937Sdes /* find this uid's offset in the lastlog file */ 1502221420Sdes offset = (off_t) ((u_long)li->uid * sizeof(struct lastlog)); 150398937Sdes 1504147005Sdes if (lseek(*fd, offset, SEEK_SET) != offset) { 1505147005Sdes logit("%s: %s->lseek(): %s", __func__, 1506147005Sdes lastlog_file, strerror(errno)); 1507221420Sdes close(*fd); 1508147005Sdes return (0); 150998937Sdes } 151098937Sdes } 151198937Sdes 1512147005Sdes return (1); 151398937Sdes} 1514192595Sdes#endif /* !LASTLOG_WRITE_PUTUTXLINE || !HAVE_GETLASTLOGXBYNAME */ 151598937Sdes 1516192595Sdes#ifdef LASTLOG_WRITE_PUTUTXLINE 1517192595Sdesint 1518192595Sdeslastlog_write_entry(struct logininfo *li) 151998937Sdes{ 1520192595Sdes switch(li->type) { 1521192595Sdes case LTYPE_LOGIN: 1522192595Sdes return 1; /* lastlog written by pututxline */ 1523192595Sdes default: 1524192595Sdes logit("lastlog_write_entry: Invalid type field"); 1525192595Sdes return 0; 152698937Sdes } 152798937Sdes} 1528192595Sdes#else /* LASTLOG_WRITE_PUTUTXLINE */ 152998937Sdesint 153098937Sdeslastlog_write_entry(struct logininfo *li) 153198937Sdes{ 1532192595Sdes struct lastlog last; 1533192595Sdes int fd; 1534192595Sdes 153598937Sdes switch(li->type) { 153698937Sdes case LTYPE_LOGIN: 1537192595Sdes /* create our struct lastlog */ 1538192595Sdes memset(&last, '\0', sizeof(last)); 1539192595Sdes line_stripname(last.ll_line, li->line, sizeof(last.ll_line)); 1540192595Sdes strlcpy(last.ll_host, li->hostname, 1541192595Sdes MIN_SIZEOF(last.ll_host, li->hostname)); 1542192595Sdes last.ll_time = li->tv_sec; 1543192595Sdes 1544192595Sdes if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) 1545192595Sdes return (0); 1546192595Sdes 1547192595Sdes /* write the entry */ 1548192595Sdes if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { 1549192595Sdes close(fd); 1550192595Sdes logit("%s: Error writing to %s: %s", __func__, 1551192595Sdes LASTLOG_FILE, strerror(errno)); 1552192595Sdes return (0); 1553192595Sdes } 1554192595Sdes 1555192595Sdes close(fd); 1556192595Sdes return (1); 155798937Sdes default: 1558147005Sdes logit("%s: Invalid type field", __func__); 1559147005Sdes return (0); 156098937Sdes } 156198937Sdes} 1562192595Sdes#endif /* LASTLOG_WRITE_PUTUTXLINE */ 156398937Sdes 1564192595Sdes#ifdef HAVE_GETLASTLOGXBYNAME 1565192595Sdesint 1566192595Sdeslastlog_get_entry(struct logininfo *li) 156798937Sdes{ 1568192595Sdes struct lastlogx l, *ll; 1569192595Sdes 1570192595Sdes if ((ll = getlastlogxbyname(li->username, &l)) == NULL) { 1571192595Sdes memset(&l, '\0', sizeof(l)); 1572192595Sdes ll = &l; 1573192595Sdes } 1574192595Sdes line_fullname(li->line, ll->ll_line, sizeof(li->line)); 1575192595Sdes strlcpy(li->hostname, ll->ll_host, 1576192595Sdes MIN_SIZEOF(li->hostname, ll->ll_host)); 1577192595Sdes li->tv_sec = ll->ll_tv.tv_sec; 1578192595Sdes li->tv_usec = ll->ll_tv.tv_usec; 1579192595Sdes return (1); 158098937Sdes} 1581192595Sdes#else /* HAVE_GETLASTLOGXBYNAME */ 158298937Sdesint 158398937Sdeslastlog_get_entry(struct logininfo *li) 158498937Sdes{ 158598937Sdes struct lastlog last; 1586113911Sdes int fd, ret; 158798937Sdes 158898937Sdes if (!lastlog_openseek(li, &fd, O_RDONLY)) 1589113911Sdes return (0); 159098937Sdes 1591113911Sdes ret = atomicio(read, fd, &last, sizeof(last)); 1592113911Sdes close(fd); 1593113911Sdes 1594113911Sdes switch (ret) { 1595113911Sdes case 0: 1596113911Sdes memset(&last, '\0', sizeof(last)); 1597113911Sdes /* FALLTHRU */ 1598113911Sdes case sizeof(last): 1599192595Sdes line_fullname(li->line, last.ll_line, sizeof(li->line)); 1600192595Sdes strlcpy(li->hostname, last.ll_host, 1601192595Sdes MIN_SIZEOF(li->hostname, last.ll_host)); 1602192595Sdes li->tv_sec = last.ll_time; 1603113911Sdes return (1); 1604113911Sdes case -1: 1605126277Sdes error("%s: Error reading from %s: %s", __func__, 160698937Sdes LASTLOG_FILE, strerror(errno)); 1607113911Sdes return (0); 1608113911Sdes default: 1609113911Sdes error("%s: Error reading from %s: Expecting %d, got %d", 1610157019Sdes __func__, LASTLOG_FILE, (int)sizeof(last), ret); 1611113911Sdes return (0); 161298937Sdes } 161398937Sdes 1614113911Sdes /* NOTREACHED */ 1615113911Sdes return (0); 161698937Sdes} 1617192595Sdes#endif /* HAVE_GETLASTLOGXBYNAME */ 161898937Sdes#endif /* USE_LASTLOG */ 1619147005Sdes 1620207319Sdes#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \ 1621207319Sdes defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER) 1622202213Sedint 1623202213Sedutmpx_get_entry(struct logininfo *li) 1624202213Sed{ 1625202213Sed struct utmpx *utx; 1626202213Sed 1627202213Sed if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0) 1628202213Sed return (0); 1629202213Sed utx = getutxuser(li->username); 1630202213Sed if (utx == NULL) { 1631202213Sed endutxent(); 1632202213Sed return (0); 1633202213Sed } 1634202213Sed 1635202213Sed line_fullname(li->line, utx->ut_line, 1636202213Sed MIN_SIZEOF(li->line, utx->ut_line)); 1637202213Sed strlcpy(li->hostname, utx->ut_host, 1638202213Sed MIN_SIZEOF(li->hostname, utx->ut_host)); 1639202213Sed li->tv_sec = utx->ut_tv.tv_sec; 1640202213Sed li->tv_usec = utx->ut_tv.tv_usec; 1641202213Sed endutxent(); 1642202213Sed return (1); 1643202213Sed} 1644207319Sdes#endif /* USE_UTMPX && HAVE_SETUTXDB && UTXDB_LASTLOGIN && HAVE_GETUTXUSER */ 1645202213Sed 1646147005Sdes#ifdef USE_BTMP 1647147005Sdes /* 1648147005Sdes * Logs failed login attempts in _PATH_BTMP if that exists. 1649147005Sdes * The most common login failure is to give password instead of username. 1650147005Sdes * So the _PATH_BTMP file checked for the correct permission, so that 1651147005Sdes * only root can read it. 1652147005Sdes */ 1653147005Sdes 1654147005Sdesvoid 1655147005Sdesrecord_failed_login(const char *username, const char *hostname, 1656147005Sdes const char *ttyn) 1657147005Sdes{ 1658147005Sdes int fd; 1659147005Sdes struct utmp ut; 1660147005Sdes struct sockaddr_storage from; 1661157019Sdes socklen_t fromlen = sizeof(from); 1662147005Sdes struct sockaddr_in *a4; 1663147005Sdes struct sockaddr_in6 *a6; 1664147005Sdes time_t t; 1665147005Sdes struct stat fst; 1666147005Sdes 1667147005Sdes if (geteuid() != 0) 1668147005Sdes return; 1669147005Sdes if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { 1670147005Sdes debug("Unable to open the btmp file %s: %s", _PATH_BTMP, 1671147005Sdes strerror(errno)); 1672147005Sdes return; 1673147005Sdes } 1674147005Sdes if (fstat(fd, &fst) < 0) { 1675147005Sdes logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, 1676147005Sdes strerror(errno)); 1677147005Sdes goto out; 1678147005Sdes } 1679221420Sdes if((fst.st_mode & (S_IXGRP | S_IRWXO)) || (fst.st_uid != 0)){ 1680147005Sdes logit("Excess permission or bad ownership on file %s", 1681147005Sdes _PATH_BTMP); 1682147005Sdes goto out; 1683147005Sdes } 1684147005Sdes 1685147005Sdes memset(&ut, 0, sizeof(ut)); 1686147005Sdes /* strncpy because we don't necessarily want nul termination */ 1687147005Sdes strncpy(ut.ut_user, username, sizeof(ut.ut_user)); 1688147005Sdes strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); 1689147005Sdes 1690147005Sdes time(&t); 1691147005Sdes ut.ut_time = t; /* ut_time is not always a time_t */ 1692147005Sdes ut.ut_type = LOGIN_PROCESS; 1693147005Sdes ut.ut_pid = getpid(); 1694147005Sdes 1695147005Sdes /* strncpy because we don't necessarily want nul termination */ 1696147005Sdes strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); 1697147005Sdes 1698147005Sdes if (packet_connection_is_on_socket() && 1699147005Sdes getpeername(packet_get_connection_in(), 1700147005Sdes (struct sockaddr *)&from, &fromlen) == 0) { 1701147005Sdes ipv64_normalise_mapped(&from, &fromlen); 1702147005Sdes if (from.ss_family == AF_INET) { 1703147005Sdes a4 = (struct sockaddr_in *)&from; 1704147005Sdes memcpy(&ut.ut_addr, &(a4->sin_addr), 1705147005Sdes MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); 1706147005Sdes } 1707147005Sdes#ifdef HAVE_ADDR_V6_IN_UTMP 1708147005Sdes if (from.ss_family == AF_INET6) { 1709147005Sdes a6 = (struct sockaddr_in6 *)&from; 1710147005Sdes memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), 1711147005Sdes MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); 1712147005Sdes } 1713147005Sdes#endif 1714147005Sdes } 1715147005Sdes 1716147005Sdes if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) 1717147005Sdes error("Failed to write to %s: %s", _PATH_BTMP, 1718147005Sdes strerror(errno)); 1719147005Sdes 1720147005Sdesout: 1721147005Sdes close(fd); 1722147005Sdes} 1723147005Sdes#endif /* USE_BTMP */ 1724