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 313262566Sdes if (strlcpy(li->username, pw->pw_name, sizeof(li->username)) >= 314262566Sdes sizeof(li->username)) { 315262566Sdes error("%s: username too long (%lu > max %lu)", __func__, 316262566Sdes (unsigned long)strlen(pw->pw_name), 317262566Sdes (unsigned long)sizeof(li->username) - 1); 318262566Sdes return NULL; 319262566Sdes } 32098937Sdes 32198937Sdes if (getlast_entry(li)) 322147005Sdes return (li); 32398937Sdes else 324147005Sdes return (NULL); 32598937Sdes} 32698937Sdes 327147005Sdes/* 328147005Sdes * login_alloc_entry(int, char*, char*, char*) - Allocate and initialise 32998937Sdes * a logininfo structure 33098937Sdes * 33198937Sdes * This function creates a new struct logininfo, a data structure 33298937Sdes * meant to carry the information required to portably record login info. 33398937Sdes * 33498937Sdes * Returns a pointer to a newly created struct logininfo. If memory 33598937Sdes * allocation fails, the program halts. 33698937Sdes */ 33798937Sdesstruct 338221420Sdeslogininfo *login_alloc_entry(pid_t pid, const char *username, 339147005Sdes const char *hostname, const char *line) 34098937Sdes{ 34198937Sdes struct logininfo *newli; 34298937Sdes 343147005Sdes newli = xmalloc(sizeof(*newli)); 344147005Sdes login_init_entry(newli, pid, username, hostname, line); 345147005Sdes return (newli); 34698937Sdes} 34798937Sdes 34898937Sdes 34998937Sdes/* login_free_entry(struct logininfo *) - free struct memory */ 35098937Sdesvoid 35198937Sdeslogin_free_entry(struct logininfo *li) 35298937Sdes{ 353255767Sdes free(li); 35498937Sdes} 35598937Sdes 35698937Sdes 35798937Sdes/* login_init_entry(struct logininfo *, int, char*, char*, char*) 35898937Sdes * - initialise a struct logininfo 35998937Sdes * 36098937Sdes * Populates a new struct logininfo, a data structure meant to carry 36198937Sdes * the information required to portably record login info. 36298937Sdes * 36398937Sdes * Returns: 1 36498937Sdes */ 36598937Sdesint 366221420Sdeslogin_init_entry(struct logininfo *li, pid_t pid, const char *username, 367147005Sdes const char *hostname, const char *line) 36898937Sdes{ 36998937Sdes struct passwd *pw; 37098937Sdes 37198937Sdes memset(li, 0, sizeof(*li)); 37298937Sdes 37398937Sdes li->pid = pid; 37498937Sdes 37598937Sdes /* set the line information */ 37698937Sdes if (line) 37798937Sdes line_fullname(li->line, line, sizeof(li->line)); 37898937Sdes 37998937Sdes if (username) { 38098937Sdes strlcpy(li->username, username, sizeof(li->username)); 38198937Sdes pw = getpwnam(li->username); 382147005Sdes if (pw == NULL) { 383149753Sdes fatal("%s: Cannot find user \"%s\"", __func__, 384147005Sdes li->username); 385147005Sdes } 38698937Sdes li->uid = pw->pw_uid; 38798937Sdes } 38898937Sdes 38998937Sdes if (hostname) 39098937Sdes strlcpy(li->hostname, hostname, sizeof(li->hostname)); 39198937Sdes 392147005Sdes return (1); 39398937Sdes} 39498937Sdes 395149753Sdes/* 396147005Sdes * login_set_current_time(struct logininfo *) - set the current time 39798937Sdes * 39898937Sdes * Set the current time in a logininfo structure. This function is 39998937Sdes * meant to eliminate the need to deal with system dependencies for 40098937Sdes * time handling. 40198937Sdes */ 40298937Sdesvoid 40398937Sdeslogin_set_current_time(struct logininfo *li) 40498937Sdes{ 40598937Sdes struct timeval tv; 40698937Sdes 40798937Sdes gettimeofday(&tv, NULL); 40898937Sdes 40998937Sdes li->tv_sec = tv.tv_sec; 41098937Sdes li->tv_usec = tv.tv_usec; 41198937Sdes} 41298937Sdes 41398937Sdes/* copy a sockaddr_* into our logininfo */ 41498937Sdesvoid 41598937Sdeslogin_set_addr(struct logininfo *li, const struct sockaddr *sa, 416147005Sdes const unsigned int sa_size) 41798937Sdes{ 41898937Sdes unsigned int bufsize = sa_size; 41998937Sdes 42098937Sdes /* make sure we don't overrun our union */ 42198937Sdes if (sizeof(li->hostaddr) < sa_size) 42298937Sdes bufsize = sizeof(li->hostaddr); 42398937Sdes 424147005Sdes memcpy(&li->hostaddr.sa, sa, bufsize); 42598937Sdes} 42698937Sdes 42798937Sdes 42898937Sdes/** 42998937Sdes ** login_write: Call low-level recording functions based on autoconf 43098937Sdes ** results 43198937Sdes **/ 43298937Sdesint 433147005Sdeslogin_write(struct logininfo *li) 43498937Sdes{ 43598937Sdes#ifndef HAVE_CYGWIN 436147005Sdes if (geteuid() != 0) { 437147005Sdes logit("Attempt to write login records by non-root user (aborting)"); 438147005Sdes return (1); 43998937Sdes } 44098937Sdes#endif 44198937Sdes 44298937Sdes /* set the timestamp */ 44398937Sdes login_set_current_time(li); 44498937Sdes#ifdef USE_LOGIN 44598937Sdes syslogin_write_entry(li); 44698937Sdes#endif 44798937Sdes#ifdef USE_LASTLOG 448147005Sdes if (li->type == LTYPE_LOGIN) 44998937Sdes lastlog_write_entry(li); 45098937Sdes#endif 45198937Sdes#ifdef USE_UTMP 45298937Sdes utmp_write_entry(li); 45398937Sdes#endif 45498937Sdes#ifdef USE_WTMP 45598937Sdes wtmp_write_entry(li); 45698937Sdes#endif 45798937Sdes#ifdef USE_UTMPX 45898937Sdes utmpx_write_entry(li); 45998937Sdes#endif 46098937Sdes#ifdef USE_WTMPX 46198937Sdes wtmpx_write_entry(li); 46298937Sdes#endif 463137019Sdes#ifdef CUSTOM_SYS_AUTH_RECORD_LOGIN 464149753Sdes if (li->type == LTYPE_LOGIN && 465149753Sdes !sys_auth_record_login(li->username,li->hostname,li->line, 466149753Sdes &loginmsg)) 467137019Sdes logit("Writing login record failed for %s", li->username); 468137019Sdes#endif 469147005Sdes#ifdef SSH_AUDIT_EVENTS 470147005Sdes if (li->type == LTYPE_LOGIN) 471221420Sdes audit_session_open(li); 472147005Sdes else if (li->type == LTYPE_LOGOUT) 473221420Sdes audit_session_close(li); 474147005Sdes#endif 475147005Sdes return (0); 47698937Sdes} 47798937Sdes 47898937Sdes#ifdef LOGIN_NEEDS_UTMPX 47998937Sdesint 48098937Sdeslogin_utmp_only(struct logininfo *li) 48198937Sdes{ 482126277Sdes li->type = LTYPE_LOGIN; 48398937Sdes login_set_current_time(li); 48498937Sdes# ifdef USE_UTMP 48598937Sdes utmp_write_entry(li); 48698937Sdes# endif 48798937Sdes# ifdef USE_WTMP 48898937Sdes wtmp_write_entry(li); 48998937Sdes# endif 49098937Sdes# ifdef USE_UTMPX 49198937Sdes utmpx_write_entry(li); 49298937Sdes# endif 49398937Sdes# ifdef USE_WTMPX 49498937Sdes wtmpx_write_entry(li); 49598937Sdes# endif 496147005Sdes return (0); 49798937Sdes} 49898937Sdes#endif 49998937Sdes 50098937Sdes/** 50198937Sdes ** getlast_entry: Call low-level functions to retrieve the last login 50298937Sdes ** time. 50398937Sdes **/ 50498937Sdes 50598937Sdes/* take the uid in li and return the last login time */ 50698937Sdesint 50798937Sdesgetlast_entry(struct logininfo *li) 50898937Sdes{ 50998937Sdes#ifdef USE_LASTLOG 51098937Sdes return(lastlog_get_entry(li)); 51198937Sdes#else /* !USE_LASTLOG */ 512207319Sdes#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \ 513207319Sdes defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER) 514207319Sdes return (utmpx_get_entry(li)); 515207319Sdes#endif 51698937Sdes 517147005Sdes#if defined(DISABLE_LASTLOG) 51898937Sdes /* On some systems we shouldn't even try to obtain last login 51998937Sdes * time, e.g. AIX */ 520147005Sdes return (0); 521147005Sdes# elif defined(USE_WTMP) && \ 522147005Sdes (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) 52398937Sdes /* retrieve last login time from utmp */ 52498937Sdes return (wtmp_get_entry(li)); 525147005Sdes# elif defined(USE_WTMPX) && \ 526147005Sdes (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) 52798937Sdes /* If wtmp isn't available, try wtmpx */ 52898937Sdes return (wtmpx_get_entry(li)); 529147005Sdes# else 53098937Sdes /* Give up: No means of retrieving last login time */ 531147005Sdes return (0); 53298937Sdes# endif /* DISABLE_LASTLOG */ 53398937Sdes#endif /* USE_LASTLOG */ 53498937Sdes} 53598937Sdes 53698937Sdes 53798937Sdes 53898937Sdes/* 53998937Sdes * 'line' string utility functions 54098937Sdes * 54198937Sdes * These functions process the 'line' string into one of three forms: 54298937Sdes * 54398937Sdes * 1. The full filename (including '/dev') 54498937Sdes * 2. The stripped name (excluding '/dev') 54598937Sdes * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 54698937Sdes * /dev/pts/1 -> ts/1 ) 54798937Sdes * 54898937Sdes * Form 3 is used on some systems to identify a .tmp.? entry when 54998937Sdes * attempting to remove it. Typically both addition and removal is 55098937Sdes * performed by one application - say, sshd - so as long as the choice 55198937Sdes * uniquely identifies a terminal it's ok. 55298937Sdes */ 55398937Sdes 55498937Sdes 555147005Sdes/* 556147005Sdes * line_fullname(): add the leading '/dev/' if it doesn't exist make 557147005Sdes * sure dst has enough space, if not just copy src (ugh) 558147005Sdes */ 55998937Sdeschar * 560149753Sdesline_fullname(char *dst, const char *src, u_int dstsize) 56198937Sdes{ 56298937Sdes memset(dst, '\0', dstsize); 563147005Sdes if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) 56498937Sdes strlcpy(dst, src, dstsize); 565147005Sdes else { 56698937Sdes strlcpy(dst, "/dev/", dstsize); 56798937Sdes strlcat(dst, src, dstsize); 56898937Sdes } 569147005Sdes return (dst); 57098937Sdes} 57198937Sdes 57298937Sdes/* line_stripname(): strip the leading '/dev' if it exists, return dst */ 57398937Sdeschar * 57498937Sdesline_stripname(char *dst, const char *src, int dstsize) 57598937Sdes{ 57698937Sdes memset(dst, '\0', dstsize); 57798937Sdes if (strncmp(src, "/dev/", 5) == 0) 57898937Sdes strlcpy(dst, src + 5, dstsize); 57998937Sdes else 58098937Sdes strlcpy(dst, src, dstsize); 581147005Sdes return (dst); 58298937Sdes} 58398937Sdes 584149753Sdes/* 585147005Sdes * line_abbrevname(): Return the abbreviated (usually four-character) 58698937Sdes * form of the line (Just use the last <dstsize> characters of the 58798937Sdes * full name.) 58898937Sdes * 58998937Sdes * NOTE: use strncpy because we do NOT necessarily want zero 590147005Sdes * termination 591147005Sdes */ 59298937Sdeschar * 59398937Sdesline_abbrevname(char *dst, const char *src, int dstsize) 59498937Sdes{ 59598937Sdes size_t len; 59698937Sdes 59798937Sdes memset(dst, '\0', dstsize); 59898937Sdes 59998937Sdes /* Always skip prefix if present */ 60098937Sdes if (strncmp(src, "/dev/", 5) == 0) 60198937Sdes src += 5; 60298937Sdes 60398937Sdes#ifdef WITH_ABBREV_NO_TTY 60498937Sdes if (strncmp(src, "tty", 3) == 0) 60598937Sdes src += 3; 60698937Sdes#endif 60798937Sdes 60898937Sdes len = strlen(src); 60998937Sdes 61098937Sdes if (len > 0) { 61198937Sdes if (((int)len - dstsize) > 0) 61298937Sdes src += ((int)len - dstsize); 61398937Sdes 61498937Sdes /* note: _don't_ change this to strlcpy */ 61598937Sdes strncpy(dst, src, (size_t)dstsize); 61698937Sdes } 61798937Sdes 618147005Sdes return (dst); 61998937Sdes} 62098937Sdes 62198937Sdes/** 62298937Sdes ** utmp utility functions 62398937Sdes ** 62498937Sdes ** These functions manipulate struct utmp, taking system differences 62598937Sdes ** into account. 62698937Sdes **/ 62798937Sdes 62898937Sdes#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) 62998937Sdes 63098937Sdes/* build the utmp structure */ 63198937Sdesvoid 63298937Sdesset_utmp_time(struct logininfo *li, struct utmp *ut) 63398937Sdes{ 634147005Sdes# if defined(HAVE_TV_IN_UTMP) 63598937Sdes ut->ut_tv.tv_sec = li->tv_sec; 63698937Sdes ut->ut_tv.tv_usec = li->tv_usec; 637147005Sdes# elif defined(HAVE_TIME_IN_UTMP) 63898937Sdes ut->ut_time = li->tv_sec; 63998937Sdes# endif 64098937Sdes} 64198937Sdes 64298937Sdesvoid 64398937Sdesconstruct_utmp(struct logininfo *li, 64498937Sdes struct utmp *ut) 64598937Sdes{ 646113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 647113911Sdes struct sockaddr_in6 *sa6; 648147005Sdes# endif 649147005Sdes 65098937Sdes memset(ut, '\0', sizeof(*ut)); 65198937Sdes 65298937Sdes /* First fill out fields used for both logins and logouts */ 65398937Sdes 65498937Sdes# ifdef HAVE_ID_IN_UTMP 65598937Sdes line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); 65698937Sdes# endif 65798937Sdes 65898937Sdes# ifdef HAVE_TYPE_IN_UTMP 65998937Sdes /* This is done here to keep utmp constants out of struct logininfo */ 66098937Sdes switch (li->type) { 66198937Sdes case LTYPE_LOGIN: 66298937Sdes ut->ut_type = USER_PROCESS; 663106130Sdes#ifdef _UNICOS 66498937Sdes cray_set_tmpdir(ut); 66598937Sdes#endif 66698937Sdes break; 66798937Sdes case LTYPE_LOGOUT: 66898937Sdes ut->ut_type = DEAD_PROCESS; 669106130Sdes#ifdef _UNICOS 67098937Sdes cray_retain_utmp(ut, li->pid); 67198937Sdes#endif 67298937Sdes break; 67398937Sdes } 67498937Sdes# endif 67598937Sdes set_utmp_time(li, ut); 67698937Sdes 67798937Sdes line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); 67898937Sdes 67998937Sdes# ifdef HAVE_PID_IN_UTMP 68098937Sdes ut->ut_pid = li->pid; 68198937Sdes# endif 68298937Sdes 68398937Sdes /* If we're logging out, leave all other fields blank */ 68498937Sdes if (li->type == LTYPE_LOGOUT) 685147005Sdes return; 68698937Sdes 68798937Sdes /* 68898937Sdes * These fields are only used when logging in, and are blank 68998937Sdes * for logouts. 69098937Sdes */ 69198937Sdes 69298937Sdes /* Use strncpy because we don't necessarily want null termination */ 693147005Sdes strncpy(ut->ut_name, li->username, 694147005Sdes MIN_SIZEOF(ut->ut_name, li->username)); 69598937Sdes# ifdef HAVE_HOST_IN_UTMP 696184122Sdes strncpy(ut->ut_host, li->hostname, 697184122Sdes MIN_SIZEOF(ut->ut_host, li->hostname)); 69898937Sdes# endif 69998937Sdes# ifdef HAVE_ADDR_IN_UTMP 70098937Sdes /* this is just a 32-bit IP address */ 70198937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 70298937Sdes ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 70398937Sdes# endif 704113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 705113911Sdes /* this is just a 128-bit IPv6 address */ 706113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 707113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 708113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 709113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 710113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 711113911Sdes ut->ut_addr_v6[1] = 0; 712113911Sdes ut->ut_addr_v6[2] = 0; 713113911Sdes ut->ut_addr_v6[3] = 0; 714113911Sdes } 715113911Sdes } 716113911Sdes# endif 71798937Sdes} 71898937Sdes#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ 71998937Sdes 72098937Sdes/** 72198937Sdes ** utmpx utility functions 72298937Sdes ** 72398937Sdes ** These functions manipulate struct utmpx, accounting for system 72498937Sdes ** variations. 72598937Sdes **/ 72698937Sdes 72798937Sdes#if defined(USE_UTMPX) || defined (USE_WTMPX) 72898937Sdes/* build the utmpx structure */ 72998937Sdesvoid 73098937Sdesset_utmpx_time(struct logininfo *li, struct utmpx *utx) 73198937Sdes{ 732147005Sdes# if defined(HAVE_TV_IN_UTMPX) 73398937Sdes utx->ut_tv.tv_sec = li->tv_sec; 73498937Sdes utx->ut_tv.tv_usec = li->tv_usec; 735147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 73698937Sdes utx->ut_time = li->tv_sec; 737147005Sdes# endif 73898937Sdes} 73998937Sdes 74098937Sdesvoid 74198937Sdesconstruct_utmpx(struct logininfo *li, struct utmpx *utx) 74298937Sdes{ 743113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 744113911Sdes struct sockaddr_in6 *sa6; 745113911Sdes# endif 74698937Sdes memset(utx, '\0', sizeof(*utx)); 747147005Sdes 74898937Sdes# ifdef HAVE_ID_IN_UTMPX 74998937Sdes line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); 75098937Sdes# endif 75198937Sdes 75298937Sdes /* this is done here to keep utmp constants out of loginrec.h */ 75398937Sdes switch (li->type) { 75498937Sdes case LTYPE_LOGIN: 75598937Sdes utx->ut_type = USER_PROCESS; 75698937Sdes break; 75798937Sdes case LTYPE_LOGOUT: 75898937Sdes utx->ut_type = DEAD_PROCESS; 75998937Sdes break; 76098937Sdes } 76198937Sdes line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); 76298937Sdes set_utmpx_time(li, utx); 76398937Sdes utx->ut_pid = li->pid; 764147005Sdes 76598937Sdes /* strncpy(): Don't necessarily want null termination */ 766202213Sed strncpy(utx->ut_user, li->username, 767202213Sed MIN_SIZEOF(utx->ut_user, li->username)); 76898937Sdes 76998937Sdes if (li->type == LTYPE_LOGOUT) 77098937Sdes return; 77198937Sdes 77298937Sdes /* 77398937Sdes * These fields are only used when logging in, and are blank 77498937Sdes * for logouts. 77598937Sdes */ 77698937Sdes 77798937Sdes# ifdef HAVE_HOST_IN_UTMPX 778147005Sdes strncpy(utx->ut_host, li->hostname, 779147005Sdes MIN_SIZEOF(utx->ut_host, li->hostname)); 78098937Sdes# endif 78198937Sdes# ifdef HAVE_ADDR_IN_UTMPX 78298937Sdes /* this is just a 32-bit IP address */ 78398937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 78498937Sdes utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 78598937Sdes# endif 786113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 787113911Sdes /* this is just a 128-bit IPv6 address */ 788113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 789113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 790113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 791113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 792113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 793113911Sdes ut->ut_addr_v6[1] = 0; 794113911Sdes ut->ut_addr_v6[2] = 0; 795113911Sdes ut->ut_addr_v6[3] = 0; 796113911Sdes } 797113911Sdes } 798113911Sdes# endif 79998937Sdes# ifdef HAVE_SYSLEN_IN_UTMPX 80098937Sdes /* ut_syslen is the length of the utx_host string */ 80198937Sdes utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); 80298937Sdes# endif 80398937Sdes} 80498937Sdes#endif /* USE_UTMPX || USE_WTMPX */ 80598937Sdes 80698937Sdes/** 80798937Sdes ** Low-level utmp functions 80898937Sdes **/ 80998937Sdes 81098937Sdes/* FIXME: (ATL) utmp_write_direct needs testing */ 81198937Sdes#ifdef USE_UTMP 81298937Sdes 81398937Sdes/* if we can, use pututline() etc. */ 81498937Sdes# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ 81598937Sdes defined(HAVE_PUTUTLINE) 81698937Sdes# define UTMP_USE_LIBRARY 81798937Sdes# endif 81898937Sdes 81998937Sdes 82098937Sdes/* write a utmp entry with the system's help (pututline() and pals) */ 82198937Sdes# ifdef UTMP_USE_LIBRARY 82298937Sdesstatic int 82398937Sdesutmp_write_library(struct logininfo *li, struct utmp *ut) 82498937Sdes{ 82598937Sdes setutent(); 82698937Sdes pututline(ut); 82798937Sdes# ifdef HAVE_ENDUTENT 82898937Sdes endutent(); 82998937Sdes# endif 830147005Sdes return (1); 83198937Sdes} 83298937Sdes# else /* UTMP_USE_LIBRARY */ 83398937Sdes 834149753Sdes/* 835147005Sdes * Write a utmp entry direct to the file 836147005Sdes * This is a slightly modification of code in OpenBSD's login.c 837147005Sdes */ 83898937Sdesstatic int 83998937Sdesutmp_write_direct(struct logininfo *li, struct utmp *ut) 84098937Sdes{ 84198937Sdes struct utmp old_ut; 84298937Sdes register int fd; 84398937Sdes int tty; 84498937Sdes 84598937Sdes /* FIXME: (ATL) ttyslot() needs local implementation */ 84698937Sdes 84798937Sdes#if defined(HAVE_GETTTYENT) 848147005Sdes struct ttyent *ty; 84998937Sdes 85098937Sdes tty=0; 85198937Sdes setttyent(); 852147005Sdes while (NULL != (ty = getttyent())) { 85398937Sdes tty++; 85498937Sdes if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) 85598937Sdes break; 85698937Sdes } 85798937Sdes endttyent(); 85898937Sdes 859147005Sdes if (NULL == ty) { 860137019Sdes logit("%s: tty not found", __func__); 861137019Sdes return (0); 86298937Sdes } 86398937Sdes#else /* FIXME */ 86498937Sdes 86598937Sdes tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ 86698937Sdes 86798937Sdes#endif /* HAVE_GETTTYENT */ 86898937Sdes 86998937Sdes if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { 870137019Sdes off_t pos, ret; 871137019Sdes 872137019Sdes pos = (off_t)tty * sizeof(struct utmp); 873137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 874147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 875221420Sdes close(fd); 876137019Sdes return (0); 877137019Sdes } 878137019Sdes if (ret != pos) { 879149753Sdes logit("%s: Couldn't seek to tty %d slot in %s", 880147005Sdes __func__, tty, UTMP_FILE); 881221420Sdes close(fd); 882137019Sdes return (0); 883137019Sdes } 88498937Sdes /* 88598937Sdes * Prevent luser from zero'ing out ut_host. 88698937Sdes * If the new ut_line is empty but the old one is not 88798937Sdes * and ut_line and ut_name match, preserve the old ut_line. 88898937Sdes */ 88998937Sdes if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && 890147005Sdes (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && 891147005Sdes (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && 892147005Sdes (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) 893147005Sdes memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); 89498937Sdes 895137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 896147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 897221420Sdes close(fd); 898137019Sdes return (0); 899137019Sdes } 900137019Sdes if (ret != pos) { 901147005Sdes logit("%s: Couldn't seek to tty %d slot in %s", 902137019Sdes __func__, tty, UTMP_FILE); 903221420Sdes close(fd); 904137019Sdes return (0); 905137019Sdes } 906147005Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 907137019Sdes logit("%s: error writing %s: %s", __func__, 90898937Sdes UTMP_FILE, strerror(errno)); 909221420Sdes close(fd); 910221420Sdes return (0); 911147005Sdes } 91298937Sdes 913147005Sdes close(fd); 914147005Sdes return (1); 91598937Sdes } else { 916147005Sdes return (0); 91798937Sdes } 91898937Sdes} 91998937Sdes# endif /* UTMP_USE_LIBRARY */ 92098937Sdes 92198937Sdesstatic int 92298937Sdesutmp_perform_login(struct logininfo *li) 92398937Sdes{ 92498937Sdes struct utmp ut; 92598937Sdes 92698937Sdes construct_utmp(li, &ut); 92798937Sdes# ifdef UTMP_USE_LIBRARY 92898937Sdes if (!utmp_write_library(li, &ut)) { 929147005Sdes logit("%s: utmp_write_library() failed", __func__); 930147005Sdes return (0); 93198937Sdes } 93298937Sdes# else 93398937Sdes if (!utmp_write_direct(li, &ut)) { 934147005Sdes logit("%s: utmp_write_direct() failed", __func__); 935147005Sdes return (0); 93698937Sdes } 93798937Sdes# endif 938147005Sdes return (1); 93998937Sdes} 94098937Sdes 94198937Sdes 94298937Sdesstatic int 94398937Sdesutmp_perform_logout(struct logininfo *li) 94498937Sdes{ 94598937Sdes struct utmp ut; 94698937Sdes 94798937Sdes construct_utmp(li, &ut); 94898937Sdes# ifdef UTMP_USE_LIBRARY 94998937Sdes if (!utmp_write_library(li, &ut)) { 950147005Sdes logit("%s: utmp_write_library() failed", __func__); 951147005Sdes return (0); 95298937Sdes } 95398937Sdes# else 95498937Sdes if (!utmp_write_direct(li, &ut)) { 955147005Sdes logit("%s: utmp_write_direct() failed", __func__); 956147005Sdes return (0); 95798937Sdes } 95898937Sdes# endif 959147005Sdes return (1); 96098937Sdes} 96198937Sdes 96298937Sdes 96398937Sdesint 96498937Sdesutmp_write_entry(struct logininfo *li) 96598937Sdes{ 96698937Sdes switch(li->type) { 96798937Sdes case LTYPE_LOGIN: 968147005Sdes return (utmp_perform_login(li)); 96998937Sdes 97098937Sdes case LTYPE_LOGOUT: 971147005Sdes return (utmp_perform_logout(li)); 97298937Sdes 97398937Sdes default: 974147005Sdes logit("%s: invalid type field", __func__); 975147005Sdes return (0); 97698937Sdes } 97798937Sdes} 97898937Sdes#endif /* USE_UTMP */ 97998937Sdes 98098937Sdes 98198937Sdes/** 98298937Sdes ** Low-level utmpx functions 98398937Sdes **/ 98498937Sdes 98598937Sdes/* not much point if we don't want utmpx entries */ 98698937Sdes#ifdef USE_UTMPX 98798937Sdes 98898937Sdes/* if we have the wherewithall, use pututxline etc. */ 98998937Sdes# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ 99098937Sdes defined(HAVE_PUTUTXLINE) 99198937Sdes# define UTMPX_USE_LIBRARY 99298937Sdes# endif 99398937Sdes 99498937Sdes 99598937Sdes/* write a utmpx entry with the system's help (pututxline() and pals) */ 99698937Sdes# ifdef UTMPX_USE_LIBRARY 99798937Sdesstatic int 99898937Sdesutmpx_write_library(struct logininfo *li, struct utmpx *utx) 99998937Sdes{ 100098937Sdes setutxent(); 100198937Sdes pututxline(utx); 100298937Sdes 100398937Sdes# ifdef HAVE_ENDUTXENT 100498937Sdes endutxent(); 100598937Sdes# endif 1006147005Sdes return (1); 100798937Sdes} 100898937Sdes 100998937Sdes# else /* UTMPX_USE_LIBRARY */ 101098937Sdes 101198937Sdes/* write a utmp entry direct to the file */ 101298937Sdesstatic int 101398937Sdesutmpx_write_direct(struct logininfo *li, struct utmpx *utx) 101498937Sdes{ 1015147005Sdes logit("%s: not implemented!", __func__); 1016147005Sdes return (0); 101798937Sdes} 101898937Sdes# endif /* UTMPX_USE_LIBRARY */ 101998937Sdes 102098937Sdesstatic int 102198937Sdesutmpx_perform_login(struct logininfo *li) 102298937Sdes{ 102398937Sdes struct utmpx utx; 102498937Sdes 102598937Sdes construct_utmpx(li, &utx); 102698937Sdes# ifdef UTMPX_USE_LIBRARY 102798937Sdes if (!utmpx_write_library(li, &utx)) { 1028147005Sdes logit("%s: utmp_write_library() failed", __func__); 1029147005Sdes return (0); 103098937Sdes } 103198937Sdes# else 103298937Sdes if (!utmpx_write_direct(li, &ut)) { 1033147005Sdes logit("%s: utmp_write_direct() failed", __func__); 1034147005Sdes return (0); 103598937Sdes } 103698937Sdes# endif 1037147005Sdes return (1); 103898937Sdes} 103998937Sdes 104098937Sdes 104198937Sdesstatic int 104298937Sdesutmpx_perform_logout(struct logininfo *li) 104398937Sdes{ 104498937Sdes struct utmpx utx; 104598937Sdes 104698937Sdes construct_utmpx(li, &utx); 104798937Sdes# ifdef HAVE_ID_IN_UTMPX 104898937Sdes line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); 104998937Sdes# endif 105098937Sdes# ifdef HAVE_TYPE_IN_UTMPX 105198937Sdes utx.ut_type = DEAD_PROCESS; 105298937Sdes# endif 105398937Sdes 105498937Sdes# ifdef UTMPX_USE_LIBRARY 105598937Sdes utmpx_write_library(li, &utx); 105698937Sdes# else 105798937Sdes utmpx_write_direct(li, &utx); 105898937Sdes# endif 1059147005Sdes return (1); 106098937Sdes} 106198937Sdes 106298937Sdesint 106398937Sdesutmpx_write_entry(struct logininfo *li) 106498937Sdes{ 106598937Sdes switch(li->type) { 106698937Sdes case LTYPE_LOGIN: 1067147005Sdes return (utmpx_perform_login(li)); 106898937Sdes case LTYPE_LOGOUT: 1069147005Sdes return (utmpx_perform_logout(li)); 107098937Sdes default: 1071147005Sdes logit("%s: invalid type field", __func__); 1072147005Sdes return (0); 107398937Sdes } 107498937Sdes} 107598937Sdes#endif /* USE_UTMPX */ 107698937Sdes 107798937Sdes 107898937Sdes/** 107998937Sdes ** Low-level wtmp functions 108098937Sdes **/ 108198937Sdes 108298937Sdes#ifdef USE_WTMP 108398937Sdes 1084149753Sdes/* 1085147005Sdes * Write a wtmp entry direct to the end of the file 1086147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1087147005Sdes */ 108898937Sdesstatic int 108998937Sdeswtmp_write(struct logininfo *li, struct utmp *ut) 109098937Sdes{ 109198937Sdes struct stat buf; 109298937Sdes int fd, ret = 1; 109398937Sdes 109498937Sdes if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1095147005Sdes logit("%s: problem writing %s: %s", __func__, 109698937Sdes WTMP_FILE, strerror(errno)); 1097147005Sdes return (0); 109898937Sdes } 109998937Sdes if (fstat(fd, &buf) == 0) 1100124211Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 110198937Sdes ftruncate(fd, buf.st_size); 1102147005Sdes logit("%s: problem writing %s: %s", __func__, 110398937Sdes WTMP_FILE, strerror(errno)); 110498937Sdes ret = 0; 110598937Sdes } 1106147005Sdes close(fd); 1107147005Sdes return (ret); 110898937Sdes} 110998937Sdes 111098937Sdesstatic int 111198937Sdeswtmp_perform_login(struct logininfo *li) 111298937Sdes{ 111398937Sdes struct utmp ut; 111498937Sdes 111598937Sdes construct_utmp(li, &ut); 1116147005Sdes return (wtmp_write(li, &ut)); 111798937Sdes} 111898937Sdes 111998937Sdes 112098937Sdesstatic int 112198937Sdeswtmp_perform_logout(struct logininfo *li) 112298937Sdes{ 112398937Sdes struct utmp ut; 112498937Sdes 112598937Sdes construct_utmp(li, &ut); 1126147005Sdes return (wtmp_write(li, &ut)); 112798937Sdes} 112898937Sdes 112998937Sdes 113098937Sdesint 113198937Sdeswtmp_write_entry(struct logininfo *li) 113298937Sdes{ 113398937Sdes switch(li->type) { 113498937Sdes case LTYPE_LOGIN: 1135147005Sdes return (wtmp_perform_login(li)); 113698937Sdes case LTYPE_LOGOUT: 1137147005Sdes return (wtmp_perform_logout(li)); 113898937Sdes default: 1139147005Sdes logit("%s: invalid type field", __func__); 1140147005Sdes return (0); 114198937Sdes } 114298937Sdes} 114398937Sdes 114498937Sdes 1145149753Sdes/* 1146147005Sdes * Notes on fetching login data from wtmp/wtmpx 114798937Sdes * 114898937Sdes * Logouts are usually recorded with (amongst other things) a blank 114998937Sdes * username on a given tty line. However, some systems (HP-UX is one) 115098937Sdes * leave all fields set, but change the ut_type field to DEAD_PROCESS. 115198937Sdes * 115298937Sdes * Since we're only looking for logins here, we know that the username 115398937Sdes * must be set correctly. On systems that leave it in, we check for 115498937Sdes * ut_type==USER_PROCESS (indicating a login.) 115598937Sdes * 115698937Sdes * Portability: Some systems may set something other than USER_PROCESS 115798937Sdes * to indicate a login process. I don't know of any as I write. Also, 115898937Sdes * it's possible that some systems may both leave the username in 115998937Sdes * place and not have ut_type. 116098937Sdes */ 116198937Sdes 116298937Sdes/* return true if this wtmp entry indicates a login */ 116398937Sdesstatic int 116498937Sdeswtmp_islogin(struct logininfo *li, struct utmp *ut) 116598937Sdes{ 116698937Sdes if (strncmp(li->username, ut->ut_name, 1167147005Sdes MIN_SIZEOF(li->username, ut->ut_name)) == 0) { 116898937Sdes# ifdef HAVE_TYPE_IN_UTMP 116998937Sdes if (ut->ut_type & USER_PROCESS) 1170147005Sdes return (1); 117198937Sdes# else 1172147005Sdes return (1); 117398937Sdes# endif 117498937Sdes } 1175147005Sdes return (0); 117698937Sdes} 117798937Sdes 117898937Sdesint 117998937Sdeswtmp_get_entry(struct logininfo *li) 118098937Sdes{ 118198937Sdes struct stat st; 118298937Sdes struct utmp ut; 1183147005Sdes int fd, found = 0; 118498937Sdes 118598937Sdes /* Clear the time entries in our logininfo */ 118698937Sdes li->tv_sec = li->tv_usec = 0; 118798937Sdes 118898937Sdes if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { 1189149753Sdes logit("%s: problem opening %s: %s", __func__, 119098937Sdes WTMP_FILE, strerror(errno)); 1191147005Sdes return (0); 119298937Sdes } 119398937Sdes if (fstat(fd, &st) != 0) { 1194149753Sdes logit("%s: couldn't stat %s: %s", __func__, 119598937Sdes WTMP_FILE, strerror(errno)); 119698937Sdes close(fd); 1197147005Sdes return (0); 119898937Sdes } 119998937Sdes 120098937Sdes /* Seek to the start of the last struct utmp */ 120198937Sdes if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { 120298937Sdes /* Looks like we've got a fresh wtmp file */ 120398937Sdes close(fd); 1204147005Sdes return (0); 120598937Sdes } 120698937Sdes 120798937Sdes while (!found) { 120898937Sdes if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { 1209149753Sdes logit("%s: read of %s failed: %s", __func__, 121098937Sdes WTMP_FILE, strerror(errno)); 121198937Sdes close (fd); 1212147005Sdes return (0); 121398937Sdes } 1214221420Sdes if (wtmp_islogin(li, &ut) ) { 121598937Sdes found = 1; 1216147005Sdes /* 1217147005Sdes * We've already checked for a time in struct 1218147005Sdes * utmp, in login_getlast() 1219147005Sdes */ 122098937Sdes# ifdef HAVE_TIME_IN_UTMP 122198937Sdes li->tv_sec = ut.ut_time; 122298937Sdes# else 122398937Sdes# if HAVE_TV_IN_UTMP 122498937Sdes li->tv_sec = ut.ut_tv.tv_sec; 122598937Sdes# endif 122698937Sdes# endif 122798937Sdes line_fullname(li->line, ut.ut_line, 1228147005Sdes MIN_SIZEOF(li->line, ut.ut_line)); 122998937Sdes# ifdef HAVE_HOST_IN_UTMP 123098937Sdes strlcpy(li->hostname, ut.ut_host, 1231147005Sdes MIN_SIZEOF(li->hostname, ut.ut_host)); 123298937Sdes# endif 123398937Sdes continue; 123498937Sdes } 123598937Sdes /* Seek back 2 x struct utmp */ 123698937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { 123798937Sdes /* We've found the start of the file, so quit */ 1238147005Sdes close(fd); 1239147005Sdes return (0); 124098937Sdes } 124198937Sdes } 124298937Sdes 124398937Sdes /* We found an entry. Tidy up and return */ 124498937Sdes close(fd); 1245147005Sdes return (1); 124698937Sdes} 124798937Sdes# endif /* USE_WTMP */ 124898937Sdes 124998937Sdes 125098937Sdes/** 125198937Sdes ** Low-level wtmpx functions 125298937Sdes **/ 125398937Sdes 125498937Sdes#ifdef USE_WTMPX 1255147005Sdes/* 1256147005Sdes * Write a wtmpx entry direct to the end of the file 1257147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1258147005Sdes */ 125998937Sdesstatic int 126098937Sdeswtmpx_write(struct logininfo *li, struct utmpx *utx) 126198937Sdes{ 1262126277Sdes#ifndef HAVE_UPDWTMPX 126398937Sdes struct stat buf; 126498937Sdes int fd, ret = 1; 126598937Sdes 126698937Sdes if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1267149753Sdes logit("%s: problem opening %s: %s", __func__, 126898937Sdes WTMPX_FILE, strerror(errno)); 1269147005Sdes return (0); 127098937Sdes } 127198937Sdes 127298937Sdes if (fstat(fd, &buf) == 0) 1273124211Sdes if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { 127498937Sdes ftruncate(fd, buf.st_size); 1275147005Sdes logit("%s: problem writing %s: %s", __func__, 127698937Sdes WTMPX_FILE, strerror(errno)); 127798937Sdes ret = 0; 127898937Sdes } 1279147005Sdes close(fd); 128098937Sdes 1281147005Sdes return (ret); 1282126277Sdes#else 1283126277Sdes updwtmpx(WTMPX_FILE, utx); 1284147005Sdes return (1); 1285126277Sdes#endif 128698937Sdes} 128798937Sdes 128898937Sdes 128998937Sdesstatic int 129098937Sdeswtmpx_perform_login(struct logininfo *li) 129198937Sdes{ 129298937Sdes struct utmpx utx; 129398937Sdes 129498937Sdes construct_utmpx(li, &utx); 1295147005Sdes return (wtmpx_write(li, &utx)); 129698937Sdes} 129798937Sdes 129898937Sdes 129998937Sdesstatic int 130098937Sdeswtmpx_perform_logout(struct logininfo *li) 130198937Sdes{ 130298937Sdes struct utmpx utx; 130398937Sdes 130498937Sdes construct_utmpx(li, &utx); 1305147005Sdes return (wtmpx_write(li, &utx)); 130698937Sdes} 130798937Sdes 130898937Sdes 130998937Sdesint 131098937Sdeswtmpx_write_entry(struct logininfo *li) 131198937Sdes{ 131298937Sdes switch(li->type) { 131398937Sdes case LTYPE_LOGIN: 1314147005Sdes return (wtmpx_perform_login(li)); 131598937Sdes case LTYPE_LOGOUT: 1316147005Sdes return (wtmpx_perform_logout(li)); 131798937Sdes default: 1318147005Sdes logit("%s: invalid type field", __func__); 1319147005Sdes return (0); 132098937Sdes } 132198937Sdes} 132298937Sdes 132398937Sdes/* Please see the notes above wtmp_islogin() for information about the 132498937Sdes next two functions */ 132598937Sdes 132698937Sdes/* Return true if this wtmpx entry indicates a login */ 132798937Sdesstatic int 132898937Sdeswtmpx_islogin(struct logininfo *li, struct utmpx *utx) 132998937Sdes{ 1330204917Sdes if (strncmp(li->username, utx->ut_user, 1331204917Sdes MIN_SIZEOF(li->username, utx->ut_user)) == 0 ) { 133298937Sdes# ifdef HAVE_TYPE_IN_UTMPX 133398937Sdes if (utx->ut_type == USER_PROCESS) 1334147005Sdes return (1); 133598937Sdes# else 1336147005Sdes return (1); 133798937Sdes# endif 133898937Sdes } 1339147005Sdes return (0); 134098937Sdes} 134198937Sdes 134298937Sdes 134398937Sdesint 134498937Sdeswtmpx_get_entry(struct logininfo *li) 134598937Sdes{ 134698937Sdes struct stat st; 134798937Sdes struct utmpx utx; 134898937Sdes int fd, found=0; 134998937Sdes 135098937Sdes /* Clear the time entries */ 135198937Sdes li->tv_sec = li->tv_usec = 0; 135298937Sdes 135398937Sdes if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { 1354149753Sdes logit("%s: problem opening %s: %s", __func__, 135598937Sdes WTMPX_FILE, strerror(errno)); 1356147005Sdes return (0); 135798937Sdes } 135898937Sdes if (fstat(fd, &st) != 0) { 1359149753Sdes logit("%s: couldn't stat %s: %s", __func__, 1360106130Sdes WTMPX_FILE, strerror(errno)); 136198937Sdes close(fd); 1362147005Sdes return (0); 136398937Sdes } 136498937Sdes 136598937Sdes /* Seek to the start of the last struct utmpx */ 136698937Sdes if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { 136798937Sdes /* probably a newly rotated wtmpx file */ 136898937Sdes close(fd); 1369147005Sdes return (0); 137098937Sdes } 137198937Sdes 137298937Sdes while (!found) { 137398937Sdes if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { 1374149753Sdes logit("%s: read of %s failed: %s", __func__, 137598937Sdes WTMPX_FILE, strerror(errno)); 137698937Sdes close (fd); 1377147005Sdes return (0); 137898937Sdes } 1379147005Sdes /* 1380149753Sdes * Logouts are recorded as a blank username on a particular 1381147005Sdes * line. So, we just need to find the username in struct utmpx 1382147005Sdes */ 1383147005Sdes if (wtmpx_islogin(li, &utx)) { 1384106130Sdes found = 1; 1385147005Sdes# if defined(HAVE_TV_IN_UTMPX) 138698937Sdes li->tv_sec = utx.ut_tv.tv_sec; 1387147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 138898937Sdes li->tv_sec = utx.ut_time; 138998937Sdes# endif 139098937Sdes line_fullname(li->line, utx.ut_line, sizeof(li->line)); 1391147005Sdes# if defined(HAVE_HOST_IN_UTMPX) 139298937Sdes strlcpy(li->hostname, utx.ut_host, 1393147005Sdes MIN_SIZEOF(li->hostname, utx.ut_host)); 139498937Sdes# endif 139598937Sdes continue; 139698937Sdes } 139798937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { 1398147005Sdes close(fd); 1399147005Sdes return (0); 140098937Sdes } 140198937Sdes } 140298937Sdes 140398937Sdes close(fd); 1404147005Sdes return (1); 140598937Sdes} 140698937Sdes#endif /* USE_WTMPX */ 140798937Sdes 140898937Sdes/** 140998937Sdes ** Low-level libutil login() functions 141098937Sdes **/ 141198937Sdes 141298937Sdes#ifdef USE_LOGIN 141398937Sdesstatic int 141498937Sdessyslogin_perform_login(struct logininfo *li) 141598937Sdes{ 141698937Sdes struct utmp *ut; 141798937Sdes 1418147005Sdes ut = xmalloc(sizeof(*ut)); 141998937Sdes construct_utmp(li, ut); 142098937Sdes login(ut); 1421113911Sdes free(ut); 142298937Sdes 1423147005Sdes return (1); 142498937Sdes} 142598937Sdes 142698937Sdesstatic int 142798937Sdessyslogin_perform_logout(struct logininfo *li) 142898937Sdes{ 142998937Sdes# ifdef HAVE_LOGOUT 1430128460Sdes char line[UT_LINESIZE]; 143198937Sdes 143298937Sdes (void)line_stripname(line, li->line, sizeof(line)); 143398937Sdes 1434147005Sdes if (!logout(line)) 1435147005Sdes logit("%s: logout() returned an error", __func__); 143698937Sdes# ifdef HAVE_LOGWTMP 1437147005Sdes else 143898937Sdes logwtmp(line, "", ""); 143998937Sdes# endif 144098937Sdes /* FIXME: (ATL - if the need arises) What to do if we have 144198937Sdes * login, but no logout? what if logout but no logwtmp? All 144298937Sdes * routines are in libutil so they should all be there, 144398937Sdes * but... */ 144498937Sdes# endif 1445147005Sdes return (1); 144698937Sdes} 144798937Sdes 144898937Sdesint 144998937Sdessyslogin_write_entry(struct logininfo *li) 145098937Sdes{ 145198937Sdes switch (li->type) { 145298937Sdes case LTYPE_LOGIN: 1453147005Sdes return (syslogin_perform_login(li)); 145498937Sdes case LTYPE_LOGOUT: 1455147005Sdes return (syslogin_perform_logout(li)); 145698937Sdes default: 1457147005Sdes logit("%s: Invalid type field", __func__); 1458147005Sdes return (0); 145998937Sdes } 146098937Sdes} 146198937Sdes#endif /* USE_LOGIN */ 146298937Sdes 146398937Sdes/* end of file log-syslogin.c */ 146498937Sdes 146598937Sdes/** 146698937Sdes ** Low-level lastlog functions 146798937Sdes **/ 146898937Sdes 146998937Sdes#ifdef USE_LASTLOG 147098937Sdes 1471192595Sdes#if !defined(LASTLOG_WRITE_PUTUTXLINE) || !defined(HAVE_GETLASTLOGXBYNAME) 1472192595Sdes/* open the file (using filemode) and seek to the login entry */ 147398937Sdesstatic int 1474192595Sdeslastlog_openseek(struct logininfo *li, int *fd, int filemode) 147598937Sdes{ 1476192595Sdes off_t offset; 1477192595Sdes char lastlog_file[1024]; 147898937Sdes struct stat st; 147998937Sdes 148098937Sdes if (stat(LASTLOG_FILE, &st) != 0) { 1481147005Sdes logit("%s: Couldn't stat %s: %s", __func__, 1482147005Sdes LASTLOG_FILE, strerror(errno)); 1483147005Sdes return (0); 148498937Sdes } 1485192595Sdes if (S_ISDIR(st.st_mode)) { 1486147005Sdes snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", 1487147005Sdes LASTLOG_FILE, li->username); 1488192595Sdes } else if (S_ISREG(st.st_mode)) { 1489192595Sdes strlcpy(lastlog_file, LASTLOG_FILE, sizeof(lastlog_file)); 1490192595Sdes } else { 1491147005Sdes logit("%s: %.100s is not a file or directory!", __func__, 1492147005Sdes LASTLOG_FILE); 1493147005Sdes return (0); 149498937Sdes } 149598937Sdes 1496124211Sdes *fd = open(lastlog_file, filemode, 0600); 1497147005Sdes if (*fd < 0) { 1498147005Sdes debug("%s: Couldn't open %s: %s", __func__, 149998937Sdes lastlog_file, strerror(errno)); 1500147005Sdes return (0); 150198937Sdes } 150298937Sdes 1503192595Sdes if (S_ISREG(st.st_mode)) { 150498937Sdes /* find this uid's offset in the lastlog file */ 1505221420Sdes offset = (off_t) ((u_long)li->uid * sizeof(struct lastlog)); 150698937Sdes 1507147005Sdes if (lseek(*fd, offset, SEEK_SET) != offset) { 1508147005Sdes logit("%s: %s->lseek(): %s", __func__, 1509147005Sdes lastlog_file, strerror(errno)); 1510221420Sdes close(*fd); 1511147005Sdes return (0); 151298937Sdes } 151398937Sdes } 151498937Sdes 1515147005Sdes return (1); 151698937Sdes} 1517192595Sdes#endif /* !LASTLOG_WRITE_PUTUTXLINE || !HAVE_GETLASTLOGXBYNAME */ 151898937Sdes 1519192595Sdes#ifdef LASTLOG_WRITE_PUTUTXLINE 1520192595Sdesint 1521192595Sdeslastlog_write_entry(struct logininfo *li) 152298937Sdes{ 1523192595Sdes switch(li->type) { 1524192595Sdes case LTYPE_LOGIN: 1525192595Sdes return 1; /* lastlog written by pututxline */ 1526192595Sdes default: 1527192595Sdes logit("lastlog_write_entry: Invalid type field"); 1528192595Sdes return 0; 152998937Sdes } 153098937Sdes} 1531192595Sdes#else /* LASTLOG_WRITE_PUTUTXLINE */ 153298937Sdesint 153398937Sdeslastlog_write_entry(struct logininfo *li) 153498937Sdes{ 1535192595Sdes struct lastlog last; 1536192595Sdes int fd; 1537192595Sdes 153898937Sdes switch(li->type) { 153998937Sdes case LTYPE_LOGIN: 1540192595Sdes /* create our struct lastlog */ 1541192595Sdes memset(&last, '\0', sizeof(last)); 1542192595Sdes line_stripname(last.ll_line, li->line, sizeof(last.ll_line)); 1543192595Sdes strlcpy(last.ll_host, li->hostname, 1544192595Sdes MIN_SIZEOF(last.ll_host, li->hostname)); 1545192595Sdes last.ll_time = li->tv_sec; 1546192595Sdes 1547192595Sdes if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) 1548192595Sdes return (0); 1549192595Sdes 1550192595Sdes /* write the entry */ 1551192595Sdes if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { 1552192595Sdes close(fd); 1553192595Sdes logit("%s: Error writing to %s: %s", __func__, 1554192595Sdes LASTLOG_FILE, strerror(errno)); 1555192595Sdes return (0); 1556192595Sdes } 1557192595Sdes 1558192595Sdes close(fd); 1559192595Sdes return (1); 156098937Sdes default: 1561147005Sdes logit("%s: Invalid type field", __func__); 1562147005Sdes return (0); 156398937Sdes } 156498937Sdes} 1565192595Sdes#endif /* LASTLOG_WRITE_PUTUTXLINE */ 156698937Sdes 1567192595Sdes#ifdef HAVE_GETLASTLOGXBYNAME 1568192595Sdesint 1569192595Sdeslastlog_get_entry(struct logininfo *li) 157098937Sdes{ 1571192595Sdes struct lastlogx l, *ll; 1572192595Sdes 1573192595Sdes if ((ll = getlastlogxbyname(li->username, &l)) == NULL) { 1574192595Sdes memset(&l, '\0', sizeof(l)); 1575192595Sdes ll = &l; 1576192595Sdes } 1577192595Sdes line_fullname(li->line, ll->ll_line, sizeof(li->line)); 1578192595Sdes strlcpy(li->hostname, ll->ll_host, 1579192595Sdes MIN_SIZEOF(li->hostname, ll->ll_host)); 1580192595Sdes li->tv_sec = ll->ll_tv.tv_sec; 1581192595Sdes li->tv_usec = ll->ll_tv.tv_usec; 1582192595Sdes return (1); 158398937Sdes} 1584192595Sdes#else /* HAVE_GETLASTLOGXBYNAME */ 158598937Sdesint 158698937Sdeslastlog_get_entry(struct logininfo *li) 158798937Sdes{ 158898937Sdes struct lastlog last; 1589113911Sdes int fd, ret; 159098937Sdes 159198937Sdes if (!lastlog_openseek(li, &fd, O_RDONLY)) 1592113911Sdes return (0); 159398937Sdes 1594113911Sdes ret = atomicio(read, fd, &last, sizeof(last)); 1595113911Sdes close(fd); 1596113911Sdes 1597113911Sdes switch (ret) { 1598113911Sdes case 0: 1599113911Sdes memset(&last, '\0', sizeof(last)); 1600113911Sdes /* FALLTHRU */ 1601113911Sdes case sizeof(last): 1602192595Sdes line_fullname(li->line, last.ll_line, sizeof(li->line)); 1603192595Sdes strlcpy(li->hostname, last.ll_host, 1604192595Sdes MIN_SIZEOF(li->hostname, last.ll_host)); 1605192595Sdes li->tv_sec = last.ll_time; 1606113911Sdes return (1); 1607113911Sdes case -1: 1608126277Sdes error("%s: Error reading from %s: %s", __func__, 160998937Sdes LASTLOG_FILE, strerror(errno)); 1610113911Sdes return (0); 1611113911Sdes default: 1612113911Sdes error("%s: Error reading from %s: Expecting %d, got %d", 1613157019Sdes __func__, LASTLOG_FILE, (int)sizeof(last), ret); 1614113911Sdes return (0); 161598937Sdes } 161698937Sdes 1617113911Sdes /* NOTREACHED */ 1618113911Sdes return (0); 161998937Sdes} 1620192595Sdes#endif /* HAVE_GETLASTLOGXBYNAME */ 162198937Sdes#endif /* USE_LASTLOG */ 1622147005Sdes 1623207319Sdes#if defined(USE_UTMPX) && defined(HAVE_SETUTXDB) && \ 1624207319Sdes defined(UTXDB_LASTLOGIN) && defined(HAVE_GETUTXUSER) 1625202213Sedint 1626202213Sedutmpx_get_entry(struct logininfo *li) 1627202213Sed{ 1628202213Sed struct utmpx *utx; 1629202213Sed 1630202213Sed if (setutxdb(UTXDB_LASTLOGIN, NULL) != 0) 1631202213Sed return (0); 1632202213Sed utx = getutxuser(li->username); 1633202213Sed if (utx == NULL) { 1634202213Sed endutxent(); 1635202213Sed return (0); 1636202213Sed } 1637202213Sed 1638202213Sed line_fullname(li->line, utx->ut_line, 1639202213Sed MIN_SIZEOF(li->line, utx->ut_line)); 1640202213Sed strlcpy(li->hostname, utx->ut_host, 1641202213Sed MIN_SIZEOF(li->hostname, utx->ut_host)); 1642202213Sed li->tv_sec = utx->ut_tv.tv_sec; 1643202213Sed li->tv_usec = utx->ut_tv.tv_usec; 1644202213Sed endutxent(); 1645202213Sed return (1); 1646202213Sed} 1647207319Sdes#endif /* USE_UTMPX && HAVE_SETUTXDB && UTXDB_LASTLOGIN && HAVE_GETUTXUSER */ 1648202213Sed 1649147005Sdes#ifdef USE_BTMP 1650147005Sdes /* 1651147005Sdes * Logs failed login attempts in _PATH_BTMP if that exists. 1652147005Sdes * The most common login failure is to give password instead of username. 1653147005Sdes * So the _PATH_BTMP file checked for the correct permission, so that 1654147005Sdes * only root can read it. 1655147005Sdes */ 1656147005Sdes 1657147005Sdesvoid 1658147005Sdesrecord_failed_login(const char *username, const char *hostname, 1659147005Sdes const char *ttyn) 1660147005Sdes{ 1661147005Sdes int fd; 1662147005Sdes struct utmp ut; 1663147005Sdes struct sockaddr_storage from; 1664157019Sdes socklen_t fromlen = sizeof(from); 1665147005Sdes struct sockaddr_in *a4; 1666147005Sdes struct sockaddr_in6 *a6; 1667147005Sdes time_t t; 1668147005Sdes struct stat fst; 1669147005Sdes 1670147005Sdes if (geteuid() != 0) 1671147005Sdes return; 1672147005Sdes if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { 1673147005Sdes debug("Unable to open the btmp file %s: %s", _PATH_BTMP, 1674147005Sdes strerror(errno)); 1675147005Sdes return; 1676147005Sdes } 1677147005Sdes if (fstat(fd, &fst) < 0) { 1678147005Sdes logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, 1679147005Sdes strerror(errno)); 1680147005Sdes goto out; 1681147005Sdes } 1682221420Sdes if((fst.st_mode & (S_IXGRP | S_IRWXO)) || (fst.st_uid != 0)){ 1683147005Sdes logit("Excess permission or bad ownership on file %s", 1684147005Sdes _PATH_BTMP); 1685147005Sdes goto out; 1686147005Sdes } 1687147005Sdes 1688147005Sdes memset(&ut, 0, sizeof(ut)); 1689147005Sdes /* strncpy because we don't necessarily want nul termination */ 1690147005Sdes strncpy(ut.ut_user, username, sizeof(ut.ut_user)); 1691147005Sdes strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); 1692147005Sdes 1693147005Sdes time(&t); 1694147005Sdes ut.ut_time = t; /* ut_time is not always a time_t */ 1695147005Sdes ut.ut_type = LOGIN_PROCESS; 1696147005Sdes ut.ut_pid = getpid(); 1697147005Sdes 1698147005Sdes /* strncpy because we don't necessarily want nul termination */ 1699147005Sdes strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); 1700147005Sdes 1701147005Sdes if (packet_connection_is_on_socket() && 1702147005Sdes getpeername(packet_get_connection_in(), 1703147005Sdes (struct sockaddr *)&from, &fromlen) == 0) { 1704147005Sdes ipv64_normalise_mapped(&from, &fromlen); 1705147005Sdes if (from.ss_family == AF_INET) { 1706147005Sdes a4 = (struct sockaddr_in *)&from; 1707147005Sdes memcpy(&ut.ut_addr, &(a4->sin_addr), 1708147005Sdes MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); 1709147005Sdes } 1710147005Sdes#ifdef HAVE_ADDR_V6_IN_UTMP 1711147005Sdes if (from.ss_family == AF_INET6) { 1712147005Sdes a6 = (struct sockaddr_in6 *)&from; 1713147005Sdes memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), 1714147005Sdes MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); 1715147005Sdes } 1716147005Sdes#endif 1717147005Sdes } 1718147005Sdes 1719147005Sdes if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) 1720147005Sdes error("Failed to write to %s: %s", _PATH_BTMP, 1721147005Sdes strerror(errno)); 1722147005Sdes 1723147005Sdesout: 1724147005Sdes close(fd); 1725147005Sdes} 1726147005Sdes#endif /* USE_BTMP */ 1727