]> andersk Git - openssh.git/blame - login.c
forgot -kb
[openssh.git] / login.c
CommitLineData
8efc0c15 1/*
5260325f 2 *
3 * login.c
4 *
5 * Author: Tatu Ylonen <ylo@cs.hut.fi>
6 *
7 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
8 * All rights reserved
9 *
10 * Created: Fri Mar 24 14:51:08 1995 ylo
11 *
12 * This file performs some of the things login(1) normally does. We cannot
13 * easily use something like login -p -h host -f user, because there are
14 * several different logins around, and it is hard to determined what kind of
15 * login the current system has. Also, we want to be able to execute commands
16 * on a tty.
17 *
18 */
8efc0c15 19
20#include "includes.h"
21RCSID("$Id$");
22
92f90c57 23#if defined(HAVE_UTMPX_H) && defined(USE_UTMPX)
8946db53 24# include <utmpx.h>
25#endif
26#ifdef HAVE_UTMP_H
27# include <utmp.h>
28#endif
5260325f 29#include "ssh.h"
4cca272e 30
5260325f 31#ifdef HAVE_UTIL_H
32# include <util.h>
33#endif
4cca272e 34#ifdef HAVE_LASTLOG_H
35# include <lastlog.h>
36#endif
09041313 37#ifdef HAVE_LOGIN_H
38# include <login.h>
39#endif
4cca272e 40
aa3378df 41/*
42 * Returns the time when the user last logged in. Returns 0 if the
43 * information is not available. This must be called before record_login.
44 * The host the user logged in from will be returned in buf.
45 */
8efc0c15 46
aa3378df 47/*
48 * Returns the time when the user last logged in (or 0 if no previous login
49 * is found). The name of the host used last time is returned in buf.
50 */
8efc0c15 51
5260325f 52unsigned long
53get_last_login_time(uid_t uid, const char *logname,
54 char *buf, unsigned int bufsize)
8efc0c15 55{
ae28776a 56#if defined(_PATH_LASTLOG) && !defined(DISABLE_LASTLOG)
5260325f 57 struct lastlog ll;
58 char *lastlog;
59 int fd;
76a8e733 60#ifdef LASTLOG_IS_DIR
12aa90af 61 char lbuf[1024];
76a8e733 62#endif /* LASTLOG_IS_DIR */
5260325f 63
64 lastlog = _PATH_LASTLOG;
65 buf[0] = '\0';
66
12aa90af 67#ifndef LASTLOG_IS_DIR
5260325f 68 fd = open(lastlog, O_RDONLY);
69 if (fd < 0)
70 return 0;
71 lseek(fd, (off_t) ((long) uid * sizeof(ll)), SEEK_SET);
76a8e733 72#else /* LASTLOG_IS_DIR */
12aa90af 73 snprintf(lbuf, sizeof(buf), "%s/%s", lastlog, logname);
74 fd = open(lbuf, O_RDONLY);
76a8e733 75 if (fd < 0)
76 return 0;
77#endif /* LASTLOG_IS_DIR */
5260325f 78 if (read(fd, &ll, sizeof(ll)) != sizeof(ll)) {
79 close(fd);
80 return 0;
81 }
82 close(fd);
83 if (bufsize > sizeof(ll.ll_host) + 1)
84 bufsize = sizeof(ll.ll_host) + 1;
85 strncpy(buf, ll.ll_host, bufsize - 1);
86 buf[bufsize - 1] = 0;
87 return ll.ll_time;
a7effaac 88
ae28776a 89#else /* defined(_PATH_LASTLOG) && !defined(DISABLE_LASTLOG) */
a7effaac 90 /* Look in wtmp for the last login */
91 struct utmp wt;
92 char *wt_file = _PATH_WTMP;
93 int fd1;
94 unsigned long t = 0;
95
96 if ( (fd1 = open(wt_file, O_RDONLY)) < 0 ) {
97 error("Couldn't open %.100s to find last login time.", wt_file);
98 return 0;
99 }
100
101 /* seek to last record of file */
102 lseek(fd1, (off_t)(0-sizeof(struct utmp)), SEEK_END);
103
104 /* loop through wtmp for our last user login record */
105 do {
106 if (read(fd1, &wt, sizeof(wt)) != sizeof(wt)) {
107 close(fd1);
108 return 0;
109 }
110
111 if ( wt.ut_type == USER_PROCESS) {
112 if ( !strncmp(logname, wt.ut_user, 8) ) {
113 t = (unsigned long) wt.ut_time;
ae28776a 114#ifdef HAVE_HOST_IN_UTMP
a7effaac 115 if (bufsize > sizeof(wt.ut_host) + 1)
116 bufsize = sizeof(wt.ut_host) + 1;
117 strncpy(buf, wt.ut_host, bufsize - 1);
118 buf[bufsize - 1] = 0;
ae28776a 119#else /* HAVE_HOST_IN_UTMP */
120 buf[0] = 0;
121#endif /* HAVE_HOST_IN_UTMP */
a7effaac 122 }
123 }
124
125 if (lseek(fd1, (off_t)(0-2*sizeof(struct utmp)), SEEK_CUR) == -1)
126 break;
127 } while (t == 0);
128
129 return t;
ae28776a 130#endif /* defined(_PATH_LASTLOG) && !defined(DISABLE_LASTLOG) */
8efc0c15 131}
132
aa3378df 133/*
134 * Records that the user has logged in. I these parts of operating systems
135 * were more standardized.
136 */
8efc0c15 137
5260325f 138void
139record_login(int pid, const char *ttyname, const char *user, uid_t uid,
48e671d5 140 const char *host, struct sockaddr * addr)
8efc0c15 141{
ae28776a 142#if defined(_PATH_LASTLOG) && !defined(DISABLE_LASTLOG)
5260325f 143 struct lastlog ll;
144 char *lastlog;
76a8e733 145#ifdef LASTLOG_IS_DIR
146 char buf[1024];
147#endif /* LASTLOG_IS_DIR */
ae28776a 148#endif /* defined(_PATH_LASTLOG) && !defined(DISABLE_LASTLOG) */
f498ed15 149 struct utmp u;
150#if defined(HAVE_UTMPX_H) && defined(USE_UTMPX)
151 struct utmpx utx;
152#endif
5260325f 153
154 /* Construct an utmp/wtmp entry. */
155 memset(&u, 0, sizeof(u));
156 strncpy(u.ut_line, ttyname + 5, sizeof(u.ut_line));
c73a0cb5 157#if defined(HAVE_ID_IN_UTMP)
21feb5fa 158 strncpy(u.ut_id, ttyname + 8, sizeof(u.ut_id));
c73a0cb5 159#endif /* defined(HAVE_ID_IN_UTMP) */
5260325f 160 strncpy(u.ut_name, user, sizeof(u.ut_name));
70e0115b 161#if defined(HAVE_TV_IN_UTMP)
162 (void)gettimeofday(&u.ut_tv, NULL);
163#else /* defined(HAVE_TV_IN_UTMP) */
164 u.ut_time = time(NULL);
165#endif /* defined(HAVE_TV_IN_UTMP) */
166#if defined(HAVE_PID_IN_UTMP)
167 u.ut_pid = (pid_t)pid;
168#endif /* HAVE_PID_IN_UTMP */
169#if defined(HAVE_TYPE_IN_UTMP)
f498ed15 170 u.ut_type = (uid == -1)?DEAD_PROCESS:USER_PROCESS;
70e0115b 171#endif /* HAVE_TYPE_IN_UTMP */
f498ed15 172#if defined(HAVE_HOST_IN_UTMP)
5260325f 173 strncpy(u.ut_host, host, sizeof(u.ut_host));
4cca272e 174#endif
4811cc0b 175#if defined(HAVE_ADDR_IN_UTMP)
bfae20ad 176 if (addr) {
177 switch (addr->sa_family) {
178 case AF_INET: {
179 struct sockaddr_in *in = (struct sockaddr_in*)addr;
180 memcpy(&(u.ut_addr), &(in->sin_addr), sizeof(&(in->sin_addr)));
181 break;
182 }
48e671d5 183#if defined(HAVE_ADDR_V6_IN_UTMP)
bfae20ad 184 case AF_INET6: {
185 struct sockaddr_in6 *in6 = (struct sockaddr_in6*)addr;
186 memcpy(u.ut_addr_v6, &(in6->sin6_addr), sizeof(&(in6->sin6_addr)));
187 break;
188 }
48e671d5 189#endif
bfae20ad 190 default:
191 break;
192 }
48e671d5 193 }
4811cc0b 194#endif
8efc0c15 195
f498ed15 196#if defined(HAVE_UTMPX_H) && defined(USE_UTMPX)
197 memset(&utx, 0, sizeof(utx));
198 strncpy(utx.ut_user, user, sizeof(utx.ut_name));
199 strncpy(utx.ut_line, ttyname + 5, sizeof(utx.ut_line));
21feb5fa 200 strncpy(utx.ut_id, ttyname + 8, sizeof(utx.ut_id));
f498ed15 201 utx.ut_pid = (pid_t)pid;
70e0115b 202 (void)gettimeofday(&utx.ut_tv, NULL);
f74efc8d 203 utx.ut_type = (uid == -1)?DEAD_PROCESS:USER_PROCESS;
204# ifdef HAVE_HOST_IN_UTMPX
205# ifdef HAVE_SYSLEN_IN_UTMPX
f498ed15 206 utx.ut_syslen = strlen(host);
f74efc8d 207 strncpy(utx.ut_host, host, utx.ut_syslen);
208# else
f498ed15 209 strncpy(utx.ut_host, host, sizeof(utx.ut_host));
f74efc8d 210# endif /* HAVE_SYSLEN_IN_UTMPX */
211# endif
48e671d5 212#if defined(HAVE_ADDR_IN_UTMPX)
aaf2abd7 213 if (addr) {
bfae20ad 214 switch (addr->sa_family) {
215 case AF_INET: {
216 struct sockaddr_in *in = (struct sockaddr_in*)addr;
217 memcpy(&(utx.ut_addr), &(in->sin_addr), sizeof(&(in->sin_addr)));
218 break;
219 }
48e671d5 220#if defined(HAVE_ADDR_V6_IN_UTMPX)
bfae20ad 221 case AF_INET6: {
222 struct sockaddr_in6 *in6 = (struct sockaddr_in6*)addr;
223 memcpy(utx.ut_addr_v6, &(in6->sin6_addr), sizeof(&(in6->sin6_addr)));
224 break;
225 }
48e671d5 226#endif
bfae20ad 227 default:
228 break;
229 }
48e671d5 230 }
231#endif
f498ed15 232#endif /* defined(HAVE_UTMPX_H) && defined(USE_UTMPX) */
5260325f 233
f74efc8d 234/*#if defined(HAVE_UTMPX_H) && defined(USE_UTMPX) && !defined(HAVE_LOGIN)*/
235#if defined(HAVE_UTMPX_H) && defined(USE_UTMPX)
f498ed15 236 login(&u, &utx);
237#else /* defined(HAVE_UTMPX_H) && defined(USE_UTMPX) */
5260325f 238 login(&u);
f498ed15 239#endif /* defined(HAVE_UTMPX_H) && defined(USE_UTMPX) */
a7effaac 240
ae28776a 241#if defined(_PATH_LASTLOG) && !defined(DISABLE_LASTLOG)
5260325f 242 lastlog = _PATH_LASTLOG;
243
244 /* Update lastlog unless actually recording a logout. */
245 if (strcmp(user, "") != 0) {
a7effaac 246 int fd;
aa3378df 247 /*
248 * It is safer to bzero the lastlog structure first because
249 * some systems might have some extra fields in it (e.g. SGI)
250 */
5260325f 251 memset(&ll, 0, sizeof(ll));
252
253 /* Update lastlog. */
254 ll.ll_time = time(NULL);
255 strncpy(ll.ll_line, ttyname + 5, sizeof(ll.ll_line));
256 strncpy(ll.ll_host, host, sizeof(ll.ll_host));
76a8e733 257#ifdef LASTLOG_IS_DIR
9d5f374b 258 snprintf(buf, sizeof(buf), "%s/%s", lastlog, user);
76a8e733 259 fd = open(buf, O_RDWR);
260 if (fd >= 0) {
261#else /* LASTLOG_IS_DIR */
5260325f 262 fd = open(lastlog, O_RDWR);
263 if (fd >= 0) {
264 lseek(fd, (off_t) ((long) uid * sizeof(ll)), SEEK_SET);
76a8e733 265#endif /* LASTLOG_IS_DIR */
5260325f 266 if (write(fd, &ll, sizeof(ll)) != sizeof(ll))
267 log("Could not write %.100s: %.100s", lastlog, strerror(errno));
268 close(fd);
269 }
8efc0c15 270 }
ae28776a 271#endif /* defined(_PATH_LASTLOG) && !defined(DISABLE_LASTLOG) */
8efc0c15 272}
5260325f 273
274/* Records that the user has logged out. */
275
276void
277record_logout(int pid, const char *ttyname)
8efc0c15 278{
4cca272e 279#ifdef HAVE_LIBUTIL_LOGIN
5260325f 280 const char *line = ttyname + 5; /* /dev/ttyq8 -> ttyq8 */
281 if (logout(line))
282 logwtmp(line, "", "");
4cca272e 283#else /* HAVE_LIBUTIL_LOGIN */
5260325f 284 record_login(pid, ttyname, "", -1, "", NULL);
4cca272e 285#endif /* HAVE_LIBUTIL_LOGIN */
8efc0c15 286}
This page took 1.987036 seconds and 5 git commands to generate.