loginrec.c revision 181111
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" 149162856Sdes__RCSID("$FreeBSD: head/crypto/openssh/loginrec.c 181111 2008-08-01 02:48:36Z des $"); 15098937Sdes 151162856Sdes#include <sys/types.h> 152162856Sdes#include <sys/stat.h> 153162856Sdes#include <sys/socket.h> 154162856Sdes 155162856Sdes#include <netinet/in.h> 156162856Sdes 157162856Sdes#include <errno.h> 158162856Sdes#include <fcntl.h> 159162856Sdes#ifdef HAVE_PATHS_H 160162856Sdes# include <paths.h> 161162856Sdes#endif 162162856Sdes#include <pwd.h> 163162856Sdes#include <stdarg.h> 164162856Sdes#include <string.h> 165181111Sdes#include <time.h> 166162856Sdes#include <unistd.h> 167162856Sdes 168162856Sdes#include "xmalloc.h" 169162856Sdes#include "key.h" 170162856Sdes#include "hostfile.h" 17198937Sdes#include "ssh.h" 17298937Sdes#include "loginrec.h" 17398937Sdes#include "log.h" 17498937Sdes#include "atomicio.h" 175147005Sdes#include "packet.h" 176147005Sdes#include "canohost.h" 177147005Sdes#include "auth.h" 178147005Sdes#include "buffer.h" 17998937Sdes 18098937Sdes#ifdef HAVE_UTIL_H 181147005Sdes# include <util.h> 18298937Sdes#endif 18398937Sdes 18498937Sdes#ifdef HAVE_LIBUTIL_H 185147005Sdes# include <libutil.h> 18698937Sdes#endif 18798937Sdes 18898937Sdes/** 18998937Sdes ** prototypes for helper functions in this file 19098937Sdes **/ 19198937Sdes 19298937Sdes#if HAVE_UTMP_H 19398937Sdesvoid set_utmp_time(struct logininfo *li, struct utmp *ut); 19498937Sdesvoid construct_utmp(struct logininfo *li, struct utmp *ut); 19598937Sdes#endif 19698937Sdes 19798937Sdes#ifdef HAVE_UTMPX_H 19898937Sdesvoid set_utmpx_time(struct logininfo *li, struct utmpx *ut); 19998937Sdesvoid construct_utmpx(struct logininfo *li, struct utmpx *ut); 20098937Sdes#endif 20198937Sdes 20298937Sdesint utmp_write_entry(struct logininfo *li); 20398937Sdesint utmpx_write_entry(struct logininfo *li); 20498937Sdesint wtmp_write_entry(struct logininfo *li); 20598937Sdesint wtmpx_write_entry(struct logininfo *li); 20698937Sdesint lastlog_write_entry(struct logininfo *li); 20798937Sdesint syslogin_write_entry(struct logininfo *li); 20898937Sdes 20998937Sdesint getlast_entry(struct logininfo *li); 21098937Sdesint lastlog_get_entry(struct logininfo *li); 21198937Sdesint wtmp_get_entry(struct logininfo *li); 21298937Sdesint wtmpx_get_entry(struct logininfo *li); 21398937Sdes 214147005Sdesextern Buffer loginmsg; 215147005Sdes 21698937Sdes/* pick the shortest string */ 217147005Sdes#define MIN_SIZEOF(s1,s2) (sizeof(s1) < sizeof(s2) ? sizeof(s1) : sizeof(s2)) 21898937Sdes 21998937Sdes/** 22098937Sdes ** platform-independent login functions 22198937Sdes **/ 22298937Sdes 223147005Sdes/* 224147005Sdes * login_login(struct logininfo *) - Record a login 22598937Sdes * 22698937Sdes * Call with a pointer to a struct logininfo initialised with 22798937Sdes * login_init_entry() or login_alloc_entry() 22898937Sdes * 22998937Sdes * Returns: 23098937Sdes * >0 if successful 23198937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 23298937Sdes */ 23398937Sdesint 234147005Sdeslogin_login(struct logininfo *li) 23598937Sdes{ 23698937Sdes li->type = LTYPE_LOGIN; 237147005Sdes return (login_write(li)); 23898937Sdes} 23998937Sdes 24098937Sdes 241147005Sdes/* 242147005Sdes * login_logout(struct logininfo *) - Record a logout 24398937Sdes * 24498937Sdes * Call as with login_login() 24598937Sdes * 24698937Sdes * Returns: 24798937Sdes * >0 if successful 24898937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 24998937Sdes */ 25098937Sdesint 25198937Sdeslogin_logout(struct logininfo *li) 25298937Sdes{ 25398937Sdes li->type = LTYPE_LOGOUT; 254147005Sdes return (login_write(li)); 25598937Sdes} 25698937Sdes 257147005Sdes/* 258147005Sdes * login_get_lastlog_time(int) - Retrieve the last login time 25998937Sdes * 26098937Sdes * Retrieve the last login time for the given uid. Will try to use the 26198937Sdes * system lastlog facilities if they are available, but will fall back 26298937Sdes * to looking in wtmp/wtmpx if necessary 26398937Sdes * 26498937Sdes * Returns: 26598937Sdes * 0 on failure, or if user has never logged in 26698937Sdes * Time in seconds from the epoch if successful 26798937Sdes * 26898937Sdes * Useful preprocessor symbols: 26998937Sdes * DISABLE_LASTLOG: If set, *never* even try to retrieve lastlog 27098937Sdes * info 27198937Sdes * USE_LASTLOG: If set, indicates the presence of system lastlog 27298937Sdes * facilities. If this and DISABLE_LASTLOG are not set, 27398937Sdes * try to retrieve lastlog information from wtmp/wtmpx. 27498937Sdes */ 27598937Sdesunsigned int 27698937Sdeslogin_get_lastlog_time(const int uid) 27798937Sdes{ 27898937Sdes struct logininfo li; 27998937Sdes 28098937Sdes if (login_get_lastlog(&li, uid)) 281147005Sdes return (li.tv_sec); 28298937Sdes else 283147005Sdes return (0); 28498937Sdes} 28598937Sdes 286147005Sdes/* 287147005Sdes * login_get_lastlog(struct logininfo *, int) - Retrieve a lastlog entry 28898937Sdes * 28998937Sdes * Retrieve a logininfo structure populated (only partially) with 29098937Sdes * information from the system lastlog data, or from wtmp/wtmpx if no 29198937Sdes * system lastlog information exists. 29298937Sdes * 29398937Sdes * Note this routine must be given a pre-allocated logininfo. 29498937Sdes * 29598937Sdes * Returns: 29698937Sdes * >0: A pointer to your struct logininfo if successful 29798937Sdes * 0 on failure (will use OpenSSH's logging facilities for diagnostics) 29898937Sdes */ 29998937Sdesstruct logininfo * 30098937Sdeslogin_get_lastlog(struct logininfo *li, const int uid) 30198937Sdes{ 30298937Sdes struct passwd *pw; 30398937Sdes 30498937Sdes memset(li, '\0', sizeof(*li)); 30598937Sdes li->uid = uid; 30698937Sdes 30798937Sdes /* 30898937Sdes * If we don't have a 'real' lastlog, we need the username to 30998937Sdes * reliably search wtmp(x) for the last login (see 31098937Sdes * wtmp_get_entry().) 31198937Sdes */ 31298937Sdes pw = getpwuid(uid); 31398937Sdes if (pw == NULL) 314147005Sdes fatal("%s: Cannot find account for uid %i", __func__, uid); 31598937Sdes 31698937Sdes /* No MIN_SIZEOF here - we absolutely *must not* truncate the 317147005Sdes * username (XXX - so check for trunc!) */ 31898937Sdes strlcpy(li->username, pw->pw_name, sizeof(li->username)); 31998937Sdes 32098937Sdes if (getlast_entry(li)) 321147005Sdes return (li); 32298937Sdes else 323147005Sdes return (NULL); 32498937Sdes} 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 33898937Sdeslogininfo *login_alloc_entry(int 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{ 35398937Sdes xfree(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 36698937Sdeslogin_init_entry(struct logininfo *li, int 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) 471147005Sdes audit_session_open(li->line); 472147005Sdes else if (li->type == LTYPE_LOGOUT) 473147005Sdes audit_session_close(li->line); 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 */ 51298937Sdes 513147005Sdes#if defined(DISABLE_LASTLOG) 51498937Sdes /* On some systems we shouldn't even try to obtain last login 51598937Sdes * time, e.g. AIX */ 516147005Sdes return (0); 517147005Sdes# elif defined(USE_WTMP) && \ 518147005Sdes (defined(HAVE_TIME_IN_UTMP) || defined(HAVE_TV_IN_UTMP)) 51998937Sdes /* retrieve last login time from utmp */ 52098937Sdes return (wtmp_get_entry(li)); 521147005Sdes# elif defined(USE_WTMPX) && \ 522147005Sdes (defined(HAVE_TIME_IN_UTMPX) || defined(HAVE_TV_IN_UTMPX)) 52398937Sdes /* If wtmp isn't available, try wtmpx */ 52498937Sdes return (wtmpx_get_entry(li)); 525147005Sdes# else 52698937Sdes /* Give up: No means of retrieving last login time */ 527147005Sdes return (0); 52898937Sdes# endif /* DISABLE_LASTLOG */ 52998937Sdes#endif /* USE_LASTLOG */ 53098937Sdes} 53198937Sdes 53298937Sdes 53398937Sdes 53498937Sdes/* 53598937Sdes * 'line' string utility functions 53698937Sdes * 53798937Sdes * These functions process the 'line' string into one of three forms: 53898937Sdes * 53998937Sdes * 1. The full filename (including '/dev') 54098937Sdes * 2. The stripped name (excluding '/dev') 54198937Sdes * 3. The abbreviated name (e.g. /dev/ttyp00 -> yp00 54298937Sdes * /dev/pts/1 -> ts/1 ) 54398937Sdes * 54498937Sdes * Form 3 is used on some systems to identify a .tmp.? entry when 54598937Sdes * attempting to remove it. Typically both addition and removal is 54698937Sdes * performed by one application - say, sshd - so as long as the choice 54798937Sdes * uniquely identifies a terminal it's ok. 54898937Sdes */ 54998937Sdes 55098937Sdes 551147005Sdes/* 552147005Sdes * line_fullname(): add the leading '/dev/' if it doesn't exist make 553147005Sdes * sure dst has enough space, if not just copy src (ugh) 554147005Sdes */ 55598937Sdeschar * 556149753Sdesline_fullname(char *dst, const char *src, u_int dstsize) 55798937Sdes{ 55898937Sdes memset(dst, '\0', dstsize); 559147005Sdes if ((strncmp(src, "/dev/", 5) == 0) || (dstsize < (strlen(src) + 5))) 56098937Sdes strlcpy(dst, src, dstsize); 561147005Sdes else { 56298937Sdes strlcpy(dst, "/dev/", dstsize); 56398937Sdes strlcat(dst, src, dstsize); 56498937Sdes } 565147005Sdes return (dst); 56698937Sdes} 56798937Sdes 56898937Sdes/* line_stripname(): strip the leading '/dev' if it exists, return dst */ 56998937Sdeschar * 57098937Sdesline_stripname(char *dst, const char *src, int dstsize) 57198937Sdes{ 57298937Sdes memset(dst, '\0', dstsize); 57398937Sdes if (strncmp(src, "/dev/", 5) == 0) 57498937Sdes strlcpy(dst, src + 5, dstsize); 57598937Sdes else 57698937Sdes strlcpy(dst, src, dstsize); 577147005Sdes return (dst); 57898937Sdes} 57998937Sdes 580149753Sdes/* 581147005Sdes * line_abbrevname(): Return the abbreviated (usually four-character) 58298937Sdes * form of the line (Just use the last <dstsize> characters of the 58398937Sdes * full name.) 58498937Sdes * 58598937Sdes * NOTE: use strncpy because we do NOT necessarily want zero 586147005Sdes * termination 587147005Sdes */ 58898937Sdeschar * 58998937Sdesline_abbrevname(char *dst, const char *src, int dstsize) 59098937Sdes{ 59198937Sdes size_t len; 59298937Sdes 59398937Sdes memset(dst, '\0', dstsize); 59498937Sdes 59598937Sdes /* Always skip prefix if present */ 59698937Sdes if (strncmp(src, "/dev/", 5) == 0) 59798937Sdes src += 5; 59898937Sdes 59998937Sdes#ifdef WITH_ABBREV_NO_TTY 60098937Sdes if (strncmp(src, "tty", 3) == 0) 60198937Sdes src += 3; 60298937Sdes#endif 60398937Sdes 60498937Sdes len = strlen(src); 60598937Sdes 60698937Sdes if (len > 0) { 60798937Sdes if (((int)len - dstsize) > 0) 60898937Sdes src += ((int)len - dstsize); 60998937Sdes 61098937Sdes /* note: _don't_ change this to strlcpy */ 61198937Sdes strncpy(dst, src, (size_t)dstsize); 61298937Sdes } 61398937Sdes 614147005Sdes return (dst); 61598937Sdes} 61698937Sdes 61798937Sdes/** 61898937Sdes ** utmp utility functions 61998937Sdes ** 62098937Sdes ** These functions manipulate struct utmp, taking system differences 62198937Sdes ** into account. 62298937Sdes **/ 62398937Sdes 62498937Sdes#if defined(USE_UTMP) || defined (USE_WTMP) || defined (USE_LOGIN) 62598937Sdes 62698937Sdes/* build the utmp structure */ 62798937Sdesvoid 62898937Sdesset_utmp_time(struct logininfo *li, struct utmp *ut) 62998937Sdes{ 630147005Sdes# if defined(HAVE_TV_IN_UTMP) 63198937Sdes ut->ut_tv.tv_sec = li->tv_sec; 63298937Sdes ut->ut_tv.tv_usec = li->tv_usec; 633147005Sdes# elif defined(HAVE_TIME_IN_UTMP) 63498937Sdes ut->ut_time = li->tv_sec; 63598937Sdes# endif 63698937Sdes} 63798937Sdes 63898937Sdesvoid 63998937Sdesconstruct_utmp(struct logininfo *li, 64098937Sdes struct utmp *ut) 64198937Sdes{ 642113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 643113911Sdes struct sockaddr_in6 *sa6; 644147005Sdes# endif 645147005Sdes 64698937Sdes memset(ut, '\0', sizeof(*ut)); 64798937Sdes 64898937Sdes /* First fill out fields used for both logins and logouts */ 64998937Sdes 65098937Sdes# ifdef HAVE_ID_IN_UTMP 65198937Sdes line_abbrevname(ut->ut_id, li->line, sizeof(ut->ut_id)); 65298937Sdes# endif 65398937Sdes 65498937Sdes# ifdef HAVE_TYPE_IN_UTMP 65598937Sdes /* This is done here to keep utmp constants out of struct logininfo */ 65698937Sdes switch (li->type) { 65798937Sdes case LTYPE_LOGIN: 65898937Sdes ut->ut_type = USER_PROCESS; 659106130Sdes#ifdef _UNICOS 66098937Sdes cray_set_tmpdir(ut); 66198937Sdes#endif 66298937Sdes break; 66398937Sdes case LTYPE_LOGOUT: 66498937Sdes ut->ut_type = DEAD_PROCESS; 665106130Sdes#ifdef _UNICOS 66698937Sdes cray_retain_utmp(ut, li->pid); 66798937Sdes#endif 66898937Sdes break; 66998937Sdes } 67098937Sdes# endif 67198937Sdes set_utmp_time(li, ut); 67298937Sdes 67398937Sdes line_stripname(ut->ut_line, li->line, sizeof(ut->ut_line)); 67498937Sdes 67598937Sdes# ifdef HAVE_PID_IN_UTMP 67698937Sdes ut->ut_pid = li->pid; 67798937Sdes# endif 67898937Sdes 67998937Sdes /* If we're logging out, leave all other fields blank */ 68098937Sdes if (li->type == LTYPE_LOGOUT) 681147005Sdes return; 68298937Sdes 68398937Sdes /* 68498937Sdes * These fields are only used when logging in, and are blank 68598937Sdes * for logouts. 68698937Sdes */ 68798937Sdes 68898937Sdes /* Use strncpy because we don't necessarily want null termination */ 689147005Sdes strncpy(ut->ut_name, li->username, 690147005Sdes MIN_SIZEOF(ut->ut_name, li->username)); 69198937Sdes# ifdef HAVE_HOST_IN_UTMP 69299768Sdes realhostname_sa(ut->ut_host, sizeof ut->ut_host, 69399768Sdes &li->hostaddr.sa, li->hostaddr.sa.sa_len); 69498937Sdes# endif 69598937Sdes# ifdef HAVE_ADDR_IN_UTMP 69698937Sdes /* this is just a 32-bit IP address */ 69798937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 69898937Sdes ut->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 69998937Sdes# endif 700113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 701113911Sdes /* this is just a 128-bit IPv6 address */ 702113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 703113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 704113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 705113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 706113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 707113911Sdes ut->ut_addr_v6[1] = 0; 708113911Sdes ut->ut_addr_v6[2] = 0; 709113911Sdes ut->ut_addr_v6[3] = 0; 710113911Sdes } 711113911Sdes } 712113911Sdes# endif 71398937Sdes} 71498937Sdes#endif /* USE_UTMP || USE_WTMP || USE_LOGIN */ 71598937Sdes 71698937Sdes/** 71798937Sdes ** utmpx utility functions 71898937Sdes ** 71998937Sdes ** These functions manipulate struct utmpx, accounting for system 72098937Sdes ** variations. 72198937Sdes **/ 72298937Sdes 72398937Sdes#if defined(USE_UTMPX) || defined (USE_WTMPX) 72498937Sdes/* build the utmpx structure */ 72598937Sdesvoid 72698937Sdesset_utmpx_time(struct logininfo *li, struct utmpx *utx) 72798937Sdes{ 728147005Sdes# if defined(HAVE_TV_IN_UTMPX) 72998937Sdes utx->ut_tv.tv_sec = li->tv_sec; 73098937Sdes utx->ut_tv.tv_usec = li->tv_usec; 731147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 73298937Sdes utx->ut_time = li->tv_sec; 733147005Sdes# endif 73498937Sdes} 73598937Sdes 73698937Sdesvoid 73798937Sdesconstruct_utmpx(struct logininfo *li, struct utmpx *utx) 73898937Sdes{ 739113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 740113911Sdes struct sockaddr_in6 *sa6; 741113911Sdes# endif 74298937Sdes memset(utx, '\0', sizeof(*utx)); 743147005Sdes 74498937Sdes# ifdef HAVE_ID_IN_UTMPX 74598937Sdes line_abbrevname(utx->ut_id, li->line, sizeof(utx->ut_id)); 74698937Sdes# endif 74798937Sdes 74898937Sdes /* this is done here to keep utmp constants out of loginrec.h */ 74998937Sdes switch (li->type) { 75098937Sdes case LTYPE_LOGIN: 75198937Sdes utx->ut_type = USER_PROCESS; 75298937Sdes break; 75398937Sdes case LTYPE_LOGOUT: 75498937Sdes utx->ut_type = DEAD_PROCESS; 75598937Sdes break; 75698937Sdes } 75798937Sdes line_stripname(utx->ut_line, li->line, sizeof(utx->ut_line)); 75898937Sdes set_utmpx_time(li, utx); 75998937Sdes utx->ut_pid = li->pid; 760147005Sdes 76198937Sdes /* strncpy(): Don't necessarily want null termination */ 762147005Sdes strncpy(utx->ut_name, li->username, 763147005Sdes MIN_SIZEOF(utx->ut_name, li->username)); 76498937Sdes 76598937Sdes if (li->type == LTYPE_LOGOUT) 76698937Sdes return; 76798937Sdes 76898937Sdes /* 76998937Sdes * These fields are only used when logging in, and are blank 77098937Sdes * for logouts. 77198937Sdes */ 77298937Sdes 77398937Sdes# ifdef HAVE_HOST_IN_UTMPX 774147005Sdes strncpy(utx->ut_host, li->hostname, 775147005Sdes MIN_SIZEOF(utx->ut_host, li->hostname)); 77698937Sdes# endif 77798937Sdes# ifdef HAVE_ADDR_IN_UTMPX 77898937Sdes /* this is just a 32-bit IP address */ 77998937Sdes if (li->hostaddr.sa.sa_family == AF_INET) 78098937Sdes utx->ut_addr = li->hostaddr.sa_in.sin_addr.s_addr; 78198937Sdes# endif 782113911Sdes# ifdef HAVE_ADDR_V6_IN_UTMP 783113911Sdes /* this is just a 128-bit IPv6 address */ 784113911Sdes if (li->hostaddr.sa.sa_family == AF_INET6) { 785113911Sdes sa6 = ((struct sockaddr_in6 *)&li->hostaddr.sa); 786113911Sdes memcpy(ut->ut_addr_v6, sa6->sin6_addr.s6_addr, 16); 787113911Sdes if (IN6_IS_ADDR_V4MAPPED(&sa6->sin6_addr)) { 788113911Sdes ut->ut_addr_v6[0] = ut->ut_addr_v6[3]; 789113911Sdes ut->ut_addr_v6[1] = 0; 790113911Sdes ut->ut_addr_v6[2] = 0; 791113911Sdes ut->ut_addr_v6[3] = 0; 792113911Sdes } 793113911Sdes } 794113911Sdes# endif 79598937Sdes# ifdef HAVE_SYSLEN_IN_UTMPX 79698937Sdes /* ut_syslen is the length of the utx_host string */ 79798937Sdes utx->ut_syslen = MIN(strlen(li->hostname), sizeof(utx->ut_host)); 79898937Sdes# endif 79998937Sdes} 80098937Sdes#endif /* USE_UTMPX || USE_WTMPX */ 80198937Sdes 80298937Sdes/** 80398937Sdes ** Low-level utmp functions 80498937Sdes **/ 80598937Sdes 80698937Sdes/* FIXME: (ATL) utmp_write_direct needs testing */ 80798937Sdes#ifdef USE_UTMP 80898937Sdes 80998937Sdes/* if we can, use pututline() etc. */ 81098937Sdes# if !defined(DISABLE_PUTUTLINE) && defined(HAVE_SETUTENT) && \ 81198937Sdes defined(HAVE_PUTUTLINE) 81298937Sdes# define UTMP_USE_LIBRARY 81398937Sdes# endif 81498937Sdes 81598937Sdes 81698937Sdes/* write a utmp entry with the system's help (pututline() and pals) */ 81798937Sdes# ifdef UTMP_USE_LIBRARY 81898937Sdesstatic int 81998937Sdesutmp_write_library(struct logininfo *li, struct utmp *ut) 82098937Sdes{ 82198937Sdes setutent(); 82298937Sdes pututline(ut); 82398937Sdes# ifdef HAVE_ENDUTENT 82498937Sdes endutent(); 82598937Sdes# endif 826147005Sdes return (1); 82798937Sdes} 82898937Sdes# else /* UTMP_USE_LIBRARY */ 82998937Sdes 830149753Sdes/* 831147005Sdes * Write a utmp entry direct to the file 832147005Sdes * This is a slightly modification of code in OpenBSD's login.c 833147005Sdes */ 83498937Sdesstatic int 83598937Sdesutmp_write_direct(struct logininfo *li, struct utmp *ut) 83698937Sdes{ 83798937Sdes struct utmp old_ut; 83898937Sdes register int fd; 83998937Sdes int tty; 84098937Sdes 84198937Sdes /* FIXME: (ATL) ttyslot() needs local implementation */ 84298937Sdes 84398937Sdes#if defined(HAVE_GETTTYENT) 844147005Sdes struct ttyent *ty; 84598937Sdes 84698937Sdes tty=0; 84798937Sdes setttyent(); 848147005Sdes while (NULL != (ty = getttyent())) { 84998937Sdes tty++; 85098937Sdes if (!strncmp(ty->ty_name, ut->ut_line, sizeof(ut->ut_line))) 85198937Sdes break; 85298937Sdes } 85398937Sdes endttyent(); 85498937Sdes 855147005Sdes if (NULL == ty) { 856137019Sdes logit("%s: tty not found", __func__); 857137019Sdes return (0); 85898937Sdes } 85998937Sdes#else /* FIXME */ 86098937Sdes 86198937Sdes tty = ttyslot(); /* seems only to work for /dev/ttyp? style names */ 86298937Sdes 86398937Sdes#endif /* HAVE_GETTTYENT */ 86498937Sdes 86598937Sdes if (tty > 0 && (fd = open(UTMP_FILE, O_RDWR|O_CREAT, 0644)) >= 0) { 866137019Sdes off_t pos, ret; 867137019Sdes 868137019Sdes pos = (off_t)tty * sizeof(struct utmp); 869137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 870147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 871137019Sdes return (0); 872137019Sdes } 873137019Sdes if (ret != pos) { 874149753Sdes logit("%s: Couldn't seek to tty %d slot in %s", 875147005Sdes __func__, tty, UTMP_FILE); 876137019Sdes return (0); 877137019Sdes } 87898937Sdes /* 87998937Sdes * Prevent luser from zero'ing out ut_host. 88098937Sdes * If the new ut_line is empty but the old one is not 88198937Sdes * and ut_line and ut_name match, preserve the old ut_line. 88298937Sdes */ 88398937Sdes if (atomicio(read, fd, &old_ut, sizeof(old_ut)) == sizeof(old_ut) && 884147005Sdes (ut->ut_host[0] == '\0') && (old_ut.ut_host[0] != '\0') && 885147005Sdes (strncmp(old_ut.ut_line, ut->ut_line, sizeof(ut->ut_line)) == 0) && 886147005Sdes (strncmp(old_ut.ut_name, ut->ut_name, sizeof(ut->ut_name)) == 0)) 887147005Sdes memcpy(ut->ut_host, old_ut.ut_host, sizeof(ut->ut_host)); 88898937Sdes 889137019Sdes if ((ret = lseek(fd, pos, SEEK_SET)) == -1) { 890147005Sdes logit("%s: lseek: %s", __func__, strerror(errno)); 891137019Sdes return (0); 892137019Sdes } 893137019Sdes if (ret != pos) { 894147005Sdes logit("%s: Couldn't seek to tty %d slot in %s", 895137019Sdes __func__, tty, UTMP_FILE); 896137019Sdes return (0); 897137019Sdes } 898147005Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 899137019Sdes logit("%s: error writing %s: %s", __func__, 90098937Sdes UTMP_FILE, strerror(errno)); 901147005Sdes } 90298937Sdes 903147005Sdes close(fd); 904147005Sdes return (1); 90598937Sdes } else { 906147005Sdes return (0); 90798937Sdes } 90898937Sdes} 90998937Sdes# endif /* UTMP_USE_LIBRARY */ 91098937Sdes 91198937Sdesstatic int 91298937Sdesutmp_perform_login(struct logininfo *li) 91398937Sdes{ 91498937Sdes struct utmp ut; 91598937Sdes 91698937Sdes construct_utmp(li, &ut); 91798937Sdes# ifdef UTMP_USE_LIBRARY 91898937Sdes if (!utmp_write_library(li, &ut)) { 919147005Sdes logit("%s: utmp_write_library() failed", __func__); 920147005Sdes return (0); 92198937Sdes } 92298937Sdes# else 92398937Sdes if (!utmp_write_direct(li, &ut)) { 924147005Sdes logit("%s: utmp_write_direct() failed", __func__); 925147005Sdes return (0); 92698937Sdes } 92798937Sdes# endif 928147005Sdes return (1); 92998937Sdes} 93098937Sdes 93198937Sdes 93298937Sdesstatic int 93398937Sdesutmp_perform_logout(struct logininfo *li) 93498937Sdes{ 93598937Sdes struct utmp ut; 93698937Sdes 93798937Sdes construct_utmp(li, &ut); 93898937Sdes# ifdef UTMP_USE_LIBRARY 93998937Sdes if (!utmp_write_library(li, &ut)) { 940147005Sdes logit("%s: utmp_write_library() failed", __func__); 941147005Sdes return (0); 94298937Sdes } 94398937Sdes# else 94498937Sdes if (!utmp_write_direct(li, &ut)) { 945147005Sdes logit("%s: utmp_write_direct() failed", __func__); 946147005Sdes return (0); 94798937Sdes } 94898937Sdes# endif 949147005Sdes return (1); 95098937Sdes} 95198937Sdes 95298937Sdes 95398937Sdesint 95498937Sdesutmp_write_entry(struct logininfo *li) 95598937Sdes{ 95698937Sdes switch(li->type) { 95798937Sdes case LTYPE_LOGIN: 958147005Sdes return (utmp_perform_login(li)); 95998937Sdes 96098937Sdes case LTYPE_LOGOUT: 961147005Sdes return (utmp_perform_logout(li)); 96298937Sdes 96398937Sdes default: 964147005Sdes logit("%s: invalid type field", __func__); 965147005Sdes return (0); 96698937Sdes } 96798937Sdes} 96898937Sdes#endif /* USE_UTMP */ 96998937Sdes 97098937Sdes 97198937Sdes/** 97298937Sdes ** Low-level utmpx functions 97398937Sdes **/ 97498937Sdes 97598937Sdes/* not much point if we don't want utmpx entries */ 97698937Sdes#ifdef USE_UTMPX 97798937Sdes 97898937Sdes/* if we have the wherewithall, use pututxline etc. */ 97998937Sdes# if !defined(DISABLE_PUTUTXLINE) && defined(HAVE_SETUTXENT) && \ 98098937Sdes defined(HAVE_PUTUTXLINE) 98198937Sdes# define UTMPX_USE_LIBRARY 98298937Sdes# endif 98398937Sdes 98498937Sdes 98598937Sdes/* write a utmpx entry with the system's help (pututxline() and pals) */ 98698937Sdes# ifdef UTMPX_USE_LIBRARY 98798937Sdesstatic int 98898937Sdesutmpx_write_library(struct logininfo *li, struct utmpx *utx) 98998937Sdes{ 99098937Sdes setutxent(); 99198937Sdes pututxline(utx); 99298937Sdes 99398937Sdes# ifdef HAVE_ENDUTXENT 99498937Sdes endutxent(); 99598937Sdes# endif 996147005Sdes return (1); 99798937Sdes} 99898937Sdes 99998937Sdes# else /* UTMPX_USE_LIBRARY */ 100098937Sdes 100198937Sdes/* write a utmp entry direct to the file */ 100298937Sdesstatic int 100398937Sdesutmpx_write_direct(struct logininfo *li, struct utmpx *utx) 100498937Sdes{ 1005147005Sdes logit("%s: not implemented!", __func__); 1006147005Sdes return (0); 100798937Sdes} 100898937Sdes# endif /* UTMPX_USE_LIBRARY */ 100998937Sdes 101098937Sdesstatic int 101198937Sdesutmpx_perform_login(struct logininfo *li) 101298937Sdes{ 101398937Sdes struct utmpx utx; 101498937Sdes 101598937Sdes construct_utmpx(li, &utx); 101698937Sdes# ifdef UTMPX_USE_LIBRARY 101798937Sdes if (!utmpx_write_library(li, &utx)) { 1018147005Sdes logit("%s: utmp_write_library() failed", __func__); 1019147005Sdes return (0); 102098937Sdes } 102198937Sdes# else 102298937Sdes if (!utmpx_write_direct(li, &ut)) { 1023147005Sdes logit("%s: utmp_write_direct() failed", __func__); 1024147005Sdes return (0); 102598937Sdes } 102698937Sdes# endif 1027147005Sdes return (1); 102898937Sdes} 102998937Sdes 103098937Sdes 103198937Sdesstatic int 103298937Sdesutmpx_perform_logout(struct logininfo *li) 103398937Sdes{ 103498937Sdes struct utmpx utx; 103598937Sdes 103698937Sdes construct_utmpx(li, &utx); 103798937Sdes# ifdef HAVE_ID_IN_UTMPX 103898937Sdes line_abbrevname(utx.ut_id, li->line, sizeof(utx.ut_id)); 103998937Sdes# endif 104098937Sdes# ifdef HAVE_TYPE_IN_UTMPX 104198937Sdes utx.ut_type = DEAD_PROCESS; 104298937Sdes# endif 104398937Sdes 104498937Sdes# ifdef UTMPX_USE_LIBRARY 104598937Sdes utmpx_write_library(li, &utx); 104698937Sdes# else 104798937Sdes utmpx_write_direct(li, &utx); 104898937Sdes# endif 1049147005Sdes return (1); 105098937Sdes} 105198937Sdes 105298937Sdesint 105398937Sdesutmpx_write_entry(struct logininfo *li) 105498937Sdes{ 105598937Sdes switch(li->type) { 105698937Sdes case LTYPE_LOGIN: 1057147005Sdes return (utmpx_perform_login(li)); 105898937Sdes case LTYPE_LOGOUT: 1059147005Sdes return (utmpx_perform_logout(li)); 106098937Sdes default: 1061147005Sdes logit("%s: invalid type field", __func__); 1062147005Sdes return (0); 106398937Sdes } 106498937Sdes} 106598937Sdes#endif /* USE_UTMPX */ 106698937Sdes 106798937Sdes 106898937Sdes/** 106998937Sdes ** Low-level wtmp functions 107098937Sdes **/ 107198937Sdes 107298937Sdes#ifdef USE_WTMP 107398937Sdes 1074149753Sdes/* 1075147005Sdes * Write a wtmp entry direct to the end of the file 1076147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1077147005Sdes */ 107898937Sdesstatic int 107998937Sdeswtmp_write(struct logininfo *li, struct utmp *ut) 108098937Sdes{ 108198937Sdes struct stat buf; 108298937Sdes int fd, ret = 1; 108398937Sdes 108498937Sdes if ((fd = open(WTMP_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1085147005Sdes logit("%s: problem writing %s: %s", __func__, 108698937Sdes WTMP_FILE, strerror(errno)); 1087147005Sdes return (0); 108898937Sdes } 108998937Sdes if (fstat(fd, &buf) == 0) 1090124211Sdes if (atomicio(vwrite, fd, ut, sizeof(*ut)) != sizeof(*ut)) { 109198937Sdes ftruncate(fd, buf.st_size); 1092147005Sdes logit("%s: problem writing %s: %s", __func__, 109398937Sdes WTMP_FILE, strerror(errno)); 109498937Sdes ret = 0; 109598937Sdes } 1096147005Sdes close(fd); 1097147005Sdes return (ret); 109898937Sdes} 109998937Sdes 110098937Sdesstatic int 110198937Sdeswtmp_perform_login(struct logininfo *li) 110298937Sdes{ 110398937Sdes struct utmp ut; 110498937Sdes 110598937Sdes construct_utmp(li, &ut); 1106147005Sdes return (wtmp_write(li, &ut)); 110798937Sdes} 110898937Sdes 110998937Sdes 111098937Sdesstatic int 111198937Sdeswtmp_perform_logout(struct logininfo *li) 111298937Sdes{ 111398937Sdes struct utmp ut; 111498937Sdes 111598937Sdes construct_utmp(li, &ut); 1116147005Sdes return (wtmp_write(li, &ut)); 111798937Sdes} 111898937Sdes 111998937Sdes 112098937Sdesint 112198937Sdeswtmp_write_entry(struct logininfo *li) 112298937Sdes{ 112398937Sdes switch(li->type) { 112498937Sdes case LTYPE_LOGIN: 1125147005Sdes return (wtmp_perform_login(li)); 112698937Sdes case LTYPE_LOGOUT: 1127147005Sdes return (wtmp_perform_logout(li)); 112898937Sdes default: 1129147005Sdes logit("%s: invalid type field", __func__); 1130147005Sdes return (0); 113198937Sdes } 113298937Sdes} 113398937Sdes 113498937Sdes 1135149753Sdes/* 1136147005Sdes * Notes on fetching login data from wtmp/wtmpx 113798937Sdes * 113898937Sdes * Logouts are usually recorded with (amongst other things) a blank 113998937Sdes * username on a given tty line. However, some systems (HP-UX is one) 114098937Sdes * leave all fields set, but change the ut_type field to DEAD_PROCESS. 114198937Sdes * 114298937Sdes * Since we're only looking for logins here, we know that the username 114398937Sdes * must be set correctly. On systems that leave it in, we check for 114498937Sdes * ut_type==USER_PROCESS (indicating a login.) 114598937Sdes * 114698937Sdes * Portability: Some systems may set something other than USER_PROCESS 114798937Sdes * to indicate a login process. I don't know of any as I write. Also, 114898937Sdes * it's possible that some systems may both leave the username in 114998937Sdes * place and not have ut_type. 115098937Sdes */ 115198937Sdes 115298937Sdes/* return true if this wtmp entry indicates a login */ 115398937Sdesstatic int 115498937Sdeswtmp_islogin(struct logininfo *li, struct utmp *ut) 115598937Sdes{ 115698937Sdes if (strncmp(li->username, ut->ut_name, 1157147005Sdes MIN_SIZEOF(li->username, ut->ut_name)) == 0) { 115898937Sdes# ifdef HAVE_TYPE_IN_UTMP 115998937Sdes if (ut->ut_type & USER_PROCESS) 1160147005Sdes return (1); 116198937Sdes# else 1162147005Sdes return (1); 116398937Sdes# endif 116498937Sdes } 1165147005Sdes return (0); 116698937Sdes} 116798937Sdes 116898937Sdesint 116998937Sdeswtmp_get_entry(struct logininfo *li) 117098937Sdes{ 117198937Sdes struct stat st; 117298937Sdes struct utmp ut; 1173147005Sdes int fd, found = 0; 117498937Sdes 117598937Sdes /* Clear the time entries in our logininfo */ 117698937Sdes li->tv_sec = li->tv_usec = 0; 117798937Sdes 117898937Sdes if ((fd = open(WTMP_FILE, O_RDONLY)) < 0) { 1179149753Sdes logit("%s: problem opening %s: %s", __func__, 118098937Sdes WTMP_FILE, strerror(errno)); 1181147005Sdes return (0); 118298937Sdes } 118398937Sdes if (fstat(fd, &st) != 0) { 1184149753Sdes logit("%s: couldn't stat %s: %s", __func__, 118598937Sdes WTMP_FILE, strerror(errno)); 118698937Sdes close(fd); 1187147005Sdes return (0); 118898937Sdes } 118998937Sdes 119098937Sdes /* Seek to the start of the last struct utmp */ 119198937Sdes if (lseek(fd, -(off_t)sizeof(struct utmp), SEEK_END) == -1) { 119298937Sdes /* Looks like we've got a fresh wtmp file */ 119398937Sdes close(fd); 1194147005Sdes return (0); 119598937Sdes } 119698937Sdes 119798937Sdes while (!found) { 119898937Sdes if (atomicio(read, fd, &ut, sizeof(ut)) != sizeof(ut)) { 1199149753Sdes logit("%s: read of %s failed: %s", __func__, 120098937Sdes WTMP_FILE, strerror(errno)); 120198937Sdes close (fd); 1202147005Sdes return (0); 120398937Sdes } 120498937Sdes if ( wtmp_islogin(li, &ut) ) { 120598937Sdes found = 1; 1206147005Sdes /* 1207147005Sdes * We've already checked for a time in struct 1208147005Sdes * utmp, in login_getlast() 1209147005Sdes */ 121098937Sdes# ifdef HAVE_TIME_IN_UTMP 121198937Sdes li->tv_sec = ut.ut_time; 121298937Sdes# else 121398937Sdes# if HAVE_TV_IN_UTMP 121498937Sdes li->tv_sec = ut.ut_tv.tv_sec; 121598937Sdes# endif 121698937Sdes# endif 121798937Sdes line_fullname(li->line, ut.ut_line, 1218147005Sdes MIN_SIZEOF(li->line, ut.ut_line)); 121998937Sdes# ifdef HAVE_HOST_IN_UTMP 122098937Sdes strlcpy(li->hostname, ut.ut_host, 1221147005Sdes MIN_SIZEOF(li->hostname, ut.ut_host)); 122298937Sdes# endif 122398937Sdes continue; 122498937Sdes } 122598937Sdes /* Seek back 2 x struct utmp */ 122698937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmp)), SEEK_CUR) == -1) { 122798937Sdes /* We've found the start of the file, so quit */ 1228147005Sdes close(fd); 1229147005Sdes return (0); 123098937Sdes } 123198937Sdes } 123298937Sdes 123398937Sdes /* We found an entry. Tidy up and return */ 123498937Sdes close(fd); 1235147005Sdes return (1); 123698937Sdes} 123798937Sdes# endif /* USE_WTMP */ 123898937Sdes 123998937Sdes 124098937Sdes/** 124198937Sdes ** Low-level wtmpx functions 124298937Sdes **/ 124398937Sdes 124498937Sdes#ifdef USE_WTMPX 1245147005Sdes/* 1246147005Sdes * Write a wtmpx entry direct to the end of the file 1247147005Sdes * This is a slight modification of code in OpenBSD's logwtmp.c 1248147005Sdes */ 124998937Sdesstatic int 125098937Sdeswtmpx_write(struct logininfo *li, struct utmpx *utx) 125198937Sdes{ 1252126277Sdes#ifndef HAVE_UPDWTMPX 125398937Sdes struct stat buf; 125498937Sdes int fd, ret = 1; 125598937Sdes 125698937Sdes if ((fd = open(WTMPX_FILE, O_WRONLY|O_APPEND, 0)) < 0) { 1257149753Sdes logit("%s: problem opening %s: %s", __func__, 125898937Sdes WTMPX_FILE, strerror(errno)); 1259147005Sdes return (0); 126098937Sdes } 126198937Sdes 126298937Sdes if (fstat(fd, &buf) == 0) 1263124211Sdes if (atomicio(vwrite, fd, utx, sizeof(*utx)) != sizeof(*utx)) { 126498937Sdes ftruncate(fd, buf.st_size); 1265147005Sdes logit("%s: problem writing %s: %s", __func__, 126698937Sdes WTMPX_FILE, strerror(errno)); 126798937Sdes ret = 0; 126898937Sdes } 1269147005Sdes close(fd); 127098937Sdes 1271147005Sdes return (ret); 1272126277Sdes#else 1273126277Sdes updwtmpx(WTMPX_FILE, utx); 1274147005Sdes return (1); 1275126277Sdes#endif 127698937Sdes} 127798937Sdes 127898937Sdes 127998937Sdesstatic int 128098937Sdeswtmpx_perform_login(struct logininfo *li) 128198937Sdes{ 128298937Sdes struct utmpx utx; 128398937Sdes 128498937Sdes construct_utmpx(li, &utx); 1285147005Sdes return (wtmpx_write(li, &utx)); 128698937Sdes} 128798937Sdes 128898937Sdes 128998937Sdesstatic int 129098937Sdeswtmpx_perform_logout(struct logininfo *li) 129198937Sdes{ 129298937Sdes struct utmpx utx; 129398937Sdes 129498937Sdes construct_utmpx(li, &utx); 1295147005Sdes return (wtmpx_write(li, &utx)); 129698937Sdes} 129798937Sdes 129898937Sdes 129998937Sdesint 130098937Sdeswtmpx_write_entry(struct logininfo *li) 130198937Sdes{ 130298937Sdes switch(li->type) { 130398937Sdes case LTYPE_LOGIN: 1304147005Sdes return (wtmpx_perform_login(li)); 130598937Sdes case LTYPE_LOGOUT: 1306147005Sdes return (wtmpx_perform_logout(li)); 130798937Sdes default: 1308147005Sdes logit("%s: invalid type field", __func__); 1309147005Sdes return (0); 131098937Sdes } 131198937Sdes} 131298937Sdes 131398937Sdes/* Please see the notes above wtmp_islogin() for information about the 131498937Sdes next two functions */ 131598937Sdes 131698937Sdes/* Return true if this wtmpx entry indicates a login */ 131798937Sdesstatic int 131898937Sdeswtmpx_islogin(struct logininfo *li, struct utmpx *utx) 131998937Sdes{ 1320147005Sdes if (strncmp(li->username, utx->ut_name, 1321147005Sdes MIN_SIZEOF(li->username, utx->ut_name)) == 0 ) { 132298937Sdes# ifdef HAVE_TYPE_IN_UTMPX 132398937Sdes if (utx->ut_type == USER_PROCESS) 1324147005Sdes return (1); 132598937Sdes# else 1326147005Sdes return (1); 132798937Sdes# endif 132898937Sdes } 1329147005Sdes return (0); 133098937Sdes} 133198937Sdes 133298937Sdes 133398937Sdesint 133498937Sdeswtmpx_get_entry(struct logininfo *li) 133598937Sdes{ 133698937Sdes struct stat st; 133798937Sdes struct utmpx utx; 133898937Sdes int fd, found=0; 133998937Sdes 134098937Sdes /* Clear the time entries */ 134198937Sdes li->tv_sec = li->tv_usec = 0; 134298937Sdes 134398937Sdes if ((fd = open(WTMPX_FILE, O_RDONLY)) < 0) { 1344149753Sdes logit("%s: problem opening %s: %s", __func__, 134598937Sdes WTMPX_FILE, strerror(errno)); 1346147005Sdes return (0); 134798937Sdes } 134898937Sdes if (fstat(fd, &st) != 0) { 1349149753Sdes logit("%s: couldn't stat %s: %s", __func__, 1350106130Sdes WTMPX_FILE, strerror(errno)); 135198937Sdes close(fd); 1352147005Sdes return (0); 135398937Sdes } 135498937Sdes 135598937Sdes /* Seek to the start of the last struct utmpx */ 135698937Sdes if (lseek(fd, -(off_t)sizeof(struct utmpx), SEEK_END) == -1 ) { 135798937Sdes /* probably a newly rotated wtmpx file */ 135898937Sdes close(fd); 1359147005Sdes return (0); 136098937Sdes } 136198937Sdes 136298937Sdes while (!found) { 136398937Sdes if (atomicio(read, fd, &utx, sizeof(utx)) != sizeof(utx)) { 1364149753Sdes logit("%s: read of %s failed: %s", __func__, 136598937Sdes WTMPX_FILE, strerror(errno)); 136698937Sdes close (fd); 1367147005Sdes return (0); 136898937Sdes } 1369147005Sdes /* 1370149753Sdes * Logouts are recorded as a blank username on a particular 1371147005Sdes * line. So, we just need to find the username in struct utmpx 1372147005Sdes */ 1373147005Sdes if (wtmpx_islogin(li, &utx)) { 1374106130Sdes found = 1; 1375147005Sdes# if defined(HAVE_TV_IN_UTMPX) 137698937Sdes li->tv_sec = utx.ut_tv.tv_sec; 1377147005Sdes# elif defined(HAVE_TIME_IN_UTMPX) 137898937Sdes li->tv_sec = utx.ut_time; 137998937Sdes# endif 138098937Sdes line_fullname(li->line, utx.ut_line, sizeof(li->line)); 1381147005Sdes# if defined(HAVE_HOST_IN_UTMPX) 138298937Sdes strlcpy(li->hostname, utx.ut_host, 1383147005Sdes MIN_SIZEOF(li->hostname, utx.ut_host)); 138498937Sdes# endif 138598937Sdes continue; 138698937Sdes } 138798937Sdes if (lseek(fd, -(off_t)(2 * sizeof(struct utmpx)), SEEK_CUR) == -1) { 1388147005Sdes close(fd); 1389147005Sdes return (0); 139098937Sdes } 139198937Sdes } 139298937Sdes 139398937Sdes close(fd); 1394147005Sdes return (1); 139598937Sdes} 139698937Sdes#endif /* USE_WTMPX */ 139798937Sdes 139898937Sdes/** 139998937Sdes ** Low-level libutil login() functions 140098937Sdes **/ 140198937Sdes 140298937Sdes#ifdef USE_LOGIN 140398937Sdesstatic int 140498937Sdessyslogin_perform_login(struct logininfo *li) 140598937Sdes{ 140698937Sdes struct utmp *ut; 140798937Sdes 1408147005Sdes ut = xmalloc(sizeof(*ut)); 140998937Sdes construct_utmp(li, ut); 141098937Sdes login(ut); 1411113911Sdes free(ut); 141298937Sdes 1413147005Sdes return (1); 141498937Sdes} 141598937Sdes 141698937Sdesstatic int 141798937Sdessyslogin_perform_logout(struct logininfo *li) 141898937Sdes{ 141998937Sdes# ifdef HAVE_LOGOUT 1420128460Sdes char line[UT_LINESIZE]; 142198937Sdes 142298937Sdes (void)line_stripname(line, li->line, sizeof(line)); 142398937Sdes 1424147005Sdes if (!logout(line)) 1425147005Sdes logit("%s: logout() returned an error", __func__); 142698937Sdes# ifdef HAVE_LOGWTMP 1427147005Sdes else 142898937Sdes logwtmp(line, "", ""); 142998937Sdes# endif 143098937Sdes /* FIXME: (ATL - if the need arises) What to do if we have 143198937Sdes * login, but no logout? what if logout but no logwtmp? All 143298937Sdes * routines are in libutil so they should all be there, 143398937Sdes * but... */ 143498937Sdes# endif 1435147005Sdes return (1); 143698937Sdes} 143798937Sdes 143898937Sdesint 143998937Sdessyslogin_write_entry(struct logininfo *li) 144098937Sdes{ 144198937Sdes switch (li->type) { 144298937Sdes case LTYPE_LOGIN: 1443147005Sdes return (syslogin_perform_login(li)); 144498937Sdes case LTYPE_LOGOUT: 1445147005Sdes return (syslogin_perform_logout(li)); 144698937Sdes default: 1447147005Sdes logit("%s: Invalid type field", __func__); 1448147005Sdes return (0); 144998937Sdes } 145098937Sdes} 145198937Sdes#endif /* USE_LOGIN */ 145298937Sdes 145398937Sdes/* end of file log-syslogin.c */ 145498937Sdes 145598937Sdes/** 145698937Sdes ** Low-level lastlog functions 145798937Sdes **/ 145898937Sdes 145998937Sdes#ifdef USE_LASTLOG 146098937Sdes#define LL_FILE 1 146198937Sdes#define LL_DIR 2 146298937Sdes#define LL_OTHER 3 146398937Sdes 146498937Sdesstatic void 146598937Sdeslastlog_construct(struct logininfo *li, struct lastlog *last) 146698937Sdes{ 146798937Sdes /* clear the structure */ 146898937Sdes memset(last, '\0', sizeof(*last)); 146998937Sdes 1470147005Sdes line_stripname(last->ll_line, li->line, sizeof(last->ll_line)); 147198937Sdes strlcpy(last->ll_host, li->hostname, 147298937Sdes MIN_SIZEOF(last->ll_host, li->hostname)); 147398937Sdes last->ll_time = li->tv_sec; 147498937Sdes} 147598937Sdes 147698937Sdesstatic int 147798937Sdeslastlog_filetype(char *filename) 147898937Sdes{ 147998937Sdes struct stat st; 148098937Sdes 148198937Sdes if (stat(LASTLOG_FILE, &st) != 0) { 1482147005Sdes logit("%s: Couldn't stat %s: %s", __func__, 1483147005Sdes LASTLOG_FILE, strerror(errno)); 1484147005Sdes return (0); 148598937Sdes } 148698937Sdes if (S_ISDIR(st.st_mode)) 1487147005Sdes return (LL_DIR); 148898937Sdes else if (S_ISREG(st.st_mode)) 1489147005Sdes return (LL_FILE); 149098937Sdes else 1491147005Sdes return (LL_OTHER); 149298937Sdes} 149398937Sdes 149498937Sdes 149598937Sdes/* open the file (using filemode) and seek to the login entry */ 149698937Sdesstatic int 149798937Sdeslastlog_openseek(struct logininfo *li, int *fd, int filemode) 149898937Sdes{ 149998937Sdes off_t offset; 150098937Sdes int type; 150198937Sdes char lastlog_file[1024]; 150298937Sdes 150398937Sdes type = lastlog_filetype(LASTLOG_FILE); 150498937Sdes switch (type) { 1505147005Sdes case LL_FILE: 1506147005Sdes strlcpy(lastlog_file, LASTLOG_FILE, 1507147005Sdes sizeof(lastlog_file)); 1508147005Sdes break; 1509147005Sdes case LL_DIR: 1510147005Sdes snprintf(lastlog_file, sizeof(lastlog_file), "%s/%s", 1511147005Sdes LASTLOG_FILE, li->username); 1512147005Sdes break; 1513147005Sdes default: 1514147005Sdes logit("%s: %.100s is not a file or directory!", __func__, 1515147005Sdes LASTLOG_FILE); 1516147005Sdes return (0); 151798937Sdes } 151898937Sdes 1519124211Sdes *fd = open(lastlog_file, filemode, 0600); 1520147005Sdes if (*fd < 0) { 1521147005Sdes debug("%s: Couldn't open %s: %s", __func__, 152298937Sdes lastlog_file, strerror(errno)); 1523147005Sdes return (0); 152498937Sdes } 152598937Sdes 152698937Sdes if (type == LL_FILE) { 152798937Sdes /* find this uid's offset in the lastlog file */ 152898937Sdes offset = (off_t) ((long)li->uid * sizeof(struct lastlog)); 152998937Sdes 1530147005Sdes if (lseek(*fd, offset, SEEK_SET) != offset) { 1531147005Sdes logit("%s: %s->lseek(): %s", __func__, 1532147005Sdes lastlog_file, strerror(errno)); 1533147005Sdes return (0); 153498937Sdes } 153598937Sdes } 153698937Sdes 1537147005Sdes return (1); 153898937Sdes} 153998937Sdes 154098937Sdesstatic int 154198937Sdeslastlog_perform_login(struct logininfo *li) 154298937Sdes{ 154398937Sdes struct lastlog last; 154498937Sdes int fd; 154598937Sdes 154698937Sdes /* create our struct lastlog */ 154798937Sdes lastlog_construct(li, &last); 154898937Sdes 154998937Sdes if (!lastlog_openseek(li, &fd, O_RDWR|O_CREAT)) 1550147005Sdes return (0); 155198937Sdes 155298937Sdes /* write the entry */ 1553124211Sdes if (atomicio(vwrite, fd, &last, sizeof(last)) != sizeof(last)) { 155498937Sdes close(fd); 1555147005Sdes logit("%s: Error writing to %s: %s", __func__, 155698937Sdes LASTLOG_FILE, strerror(errno)); 1557147005Sdes return (0); 155898937Sdes } 155998937Sdes 156098937Sdes close(fd); 1561147005Sdes return (1); 156298937Sdes} 156398937Sdes 156498937Sdesint 156598937Sdeslastlog_write_entry(struct logininfo *li) 156698937Sdes{ 156798937Sdes switch(li->type) { 156898937Sdes case LTYPE_LOGIN: 1569147005Sdes return (lastlog_perform_login(li)); 157098937Sdes default: 1571147005Sdes logit("%s: Invalid type field", __func__); 1572147005Sdes return (0); 157398937Sdes } 157498937Sdes} 157598937Sdes 157698937Sdesstatic void 157798937Sdeslastlog_populate_entry(struct logininfo *li, struct lastlog *last) 157898937Sdes{ 157998937Sdes line_fullname(li->line, last->ll_line, sizeof(li->line)); 158098937Sdes strlcpy(li->hostname, last->ll_host, 1581147005Sdes MIN_SIZEOF(li->hostname, last->ll_host)); 158298937Sdes li->tv_sec = last->ll_time; 158398937Sdes} 158498937Sdes 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): 1602113911Sdes lastlog_populate_entry(li, &last); 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} 161798937Sdes#endif /* USE_LASTLOG */ 1618147005Sdes 1619147005Sdes#ifdef USE_BTMP 1620147005Sdes /* 1621147005Sdes * Logs failed login attempts in _PATH_BTMP if that exists. 1622147005Sdes * The most common login failure is to give password instead of username. 1623147005Sdes * So the _PATH_BTMP file checked for the correct permission, so that 1624147005Sdes * only root can read it. 1625147005Sdes */ 1626147005Sdes 1627147005Sdesvoid 1628147005Sdesrecord_failed_login(const char *username, const char *hostname, 1629147005Sdes const char *ttyn) 1630147005Sdes{ 1631147005Sdes int fd; 1632147005Sdes struct utmp ut; 1633147005Sdes struct sockaddr_storage from; 1634157019Sdes socklen_t fromlen = sizeof(from); 1635147005Sdes struct sockaddr_in *a4; 1636147005Sdes struct sockaddr_in6 *a6; 1637147005Sdes time_t t; 1638147005Sdes struct stat fst; 1639147005Sdes 1640147005Sdes if (geteuid() != 0) 1641147005Sdes return; 1642147005Sdes if ((fd = open(_PATH_BTMP, O_WRONLY | O_APPEND)) < 0) { 1643147005Sdes debug("Unable to open the btmp file %s: %s", _PATH_BTMP, 1644147005Sdes strerror(errno)); 1645147005Sdes return; 1646147005Sdes } 1647147005Sdes if (fstat(fd, &fst) < 0) { 1648147005Sdes logit("%s: fstat of %s failed: %s", __func__, _PATH_BTMP, 1649147005Sdes strerror(errno)); 1650147005Sdes goto out; 1651147005Sdes } 1652147005Sdes if((fst.st_mode & (S_IRWXG | S_IRWXO)) || (fst.st_uid != 0)){ 1653147005Sdes logit("Excess permission or bad ownership on file %s", 1654147005Sdes _PATH_BTMP); 1655147005Sdes goto out; 1656147005Sdes } 1657147005Sdes 1658147005Sdes memset(&ut, 0, sizeof(ut)); 1659147005Sdes /* strncpy because we don't necessarily want nul termination */ 1660147005Sdes strncpy(ut.ut_user, username, sizeof(ut.ut_user)); 1661147005Sdes strlcpy(ut.ut_line, "ssh:notty", sizeof(ut.ut_line)); 1662147005Sdes 1663147005Sdes time(&t); 1664147005Sdes ut.ut_time = t; /* ut_time is not always a time_t */ 1665147005Sdes ut.ut_type = LOGIN_PROCESS; 1666147005Sdes ut.ut_pid = getpid(); 1667147005Sdes 1668147005Sdes /* strncpy because we don't necessarily want nul termination */ 1669147005Sdes strncpy(ut.ut_host, hostname, sizeof(ut.ut_host)); 1670147005Sdes 1671147005Sdes if (packet_connection_is_on_socket() && 1672147005Sdes getpeername(packet_get_connection_in(), 1673147005Sdes (struct sockaddr *)&from, &fromlen) == 0) { 1674147005Sdes ipv64_normalise_mapped(&from, &fromlen); 1675147005Sdes if (from.ss_family == AF_INET) { 1676147005Sdes a4 = (struct sockaddr_in *)&from; 1677147005Sdes memcpy(&ut.ut_addr, &(a4->sin_addr), 1678147005Sdes MIN_SIZEOF(ut.ut_addr, a4->sin_addr)); 1679147005Sdes } 1680147005Sdes#ifdef HAVE_ADDR_V6_IN_UTMP 1681147005Sdes if (from.ss_family == AF_INET6) { 1682147005Sdes a6 = (struct sockaddr_in6 *)&from; 1683147005Sdes memcpy(&ut.ut_addr_v6, &(a6->sin6_addr), 1684147005Sdes MIN_SIZEOF(ut.ut_addr_v6, a6->sin6_addr)); 1685147005Sdes } 1686147005Sdes#endif 1687147005Sdes } 1688147005Sdes 1689147005Sdes if (atomicio(vwrite, fd, &ut, sizeof(ut)) != sizeof(ut)) 1690147005Sdes error("Failed to write to %s: %s", _PATH_BTMP, 1691147005Sdes strerror(errno)); 1692147005Sdes 1693147005Sdesout: 1694147005Sdes close(fd); 1695147005Sdes} 1696147005Sdes#endif /* USE_BTMP */ 1697