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0d5f7abc | 1 | /* |
69134b9b | 2 | * This file has been heavily modified from the original OpenBSD version |
0d5f7abc | 3 | */ |
4 | ||
beb43d31 | 5 | /* $OpenBSD: login.c,v 1.5 1998/07/13 02:11:12 millert Exp $ */ |
6 | /* | |
7 | * Copyright (c) 1988, 1993 | |
8 | * The Regents of the University of California. All rights reserved. | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. All advertising materials mentioning features or use of this software | |
19 | * must display the following acknowledgement: | |
20 | * This product includes software developed by the University of | |
21 | * California, Berkeley and its contributors. | |
22 | * 4. Neither the name of the University nor the names of its contributors | |
23 | * may be used to endorse or promote products derived from this software | |
24 | * without specific prior written permission. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
36 | * SUCH DAMAGE. | |
37 | */ | |
38 | ||
39 | #include "config.h" | |
40 | #ifndef HAVE_LOGIN | |
41 | ||
0d5f7abc | 42 | #include <errno.h> |
43 | ||
beb43d31 | 44 | #if defined(LIBC_SCCS) && !defined(lint) |
45 | /* from: static char sccsid[] = "@(#)login.c 8.1 (Berkeley) 6/4/93"; */ | |
b09a984b | 46 | static char *rcsid = "$OpenBSD: login.c,v 1.5 1998/07/13 02:11:12 millert Exp $"; |
beb43d31 | 47 | #endif /* LIBC_SCCS and not lint */ |
48 | ||
49 | #include <sys/types.h> | |
50 | ||
51 | #include <fcntl.h> | |
52 | #include <unistd.h> | |
53 | #include <stdlib.h> | |
92f90c57 | 54 | #if defined(HAVE_UTMPX_H) && defined(USE_UTMPX) |
8946db53 | 55 | # include <utmpx.h> |
56 | #endif | |
57 | #ifdef HAVE_UTMP_H | |
58 | # include <utmp.h> | |
59 | #endif | |
beb43d31 | 60 | #include <stdio.h> |
847e8865 | 61 | #include <string.h> |
beb43d31 | 62 | |
a423beaf | 63 | #ifdef USER_PROCESS |
0d5f7abc | 64 | /* |
65 | * find first matching slot in utmp, or "-1" for none | |
66 | * | |
67 | * algorithm: for USER_PROCESS, check tty name | |
68 | * for DEAD_PROCESS, check PID and tty name | |
69 | * | |
70 | */ | |
71 | int find_tty_slot( utp ) | |
72 | struct utmp * utp; | |
73 | { | |
74 | int t = 0; | |
75 | struct utmp * u; | |
76 | ||
69134b9b | 77 | # if defined(HAVE_TYPE_IN_UTMP) || defined(HAVE_TYPE_IN_UTMPX) |
0d5f7abc | 78 | setutent(); |
79 | ||
80 | while((u = getutent()) != NULL) { | |
81 | if (utp->ut_type == USER_PROCESS && | |
82 | (strncmp(utp->ut_line, u->ut_line, sizeof(utp->ut_line)) == 0)) { | |
83 | endutent(); | |
84 | return(t); | |
85 | } | |
86 | ||
87 | if ((utp->ut_type == DEAD_PROCESS) && (utp->ut_pid == u->ut_pid) && | |
88 | (strncmp(utp->ut_line, u->ut_line, sizeof(utp->ut_line)) == 0 )) { | |
89 | endutent(); | |
90 | return(t); | |
91 | } | |
92 | t++; | |
93 | } | |
94 | ||
95 | endutent(); | |
69134b9b | 96 | # endif /* defined(HAVE_TYPE_IN_UTMP) || defined(HAVE_TYPE_IN_UTMPX) */ |
0d5f7abc | 97 | return(-1); |
98 | } | |
69134b9b | 99 | #else /* USER_PROCESS */ |
100 | int find_tty_slot(struct utmp *utp) | |
a423beaf | 101 | { |
102 | return(ttyslot()); | |
103 | } | |
69134b9b | 104 | #endif /* USER_PROCESS */ |
0d5f7abc | 105 | |
f498ed15 | 106 | #if defined(HAVE_UTMPX_H) && defined(USE_UTMPX) |
69134b9b | 107 | void login(struct utmpx *utx) |
f498ed15 | 108 | #else /* defined(HAVE_UTMPX_H) && defined(USE_UTMPX) */ |
69134b9b | 109 | void login(struct utmp *utp) |
f498ed15 | 110 | #endif /* defined(HAVE_UTMPX_H) && defined(USE_UTMPX) */ |
beb43d31 | 111 | { |
69134b9b | 112 | /* Use proper API if we have it */ |
113 | #if defined(USE_UTMPX) | |
114 | # if defined(HAVE_PUTUTXLINE) | |
115 | setutxent(); | |
116 | pututxline(utx); | |
117 | endutxent(); | |
118 | # endif /* defined(HAVE_PUTUTXLINE) */ | |
119 | # if defined(HAVE_UPDWTMPX) | |
120 | updwtmpx(_PATH_WTMPX, utx); | |
121 | # endif /* defined(HAVE_UPDWTMPX) */ | |
122 | #else /* defined(USE_UTMPX) */ | |
123 | # if defined(HAVE_PUTUTLINE) | |
124 | setutent(); | |
125 | pututline(utp); | |
126 | endutent(); | |
127 | # endif /* defined(HAVE_PUTUTLINE) */ | |
128 | # if defined(HAVE_UPDWTMPX) | |
129 | updwtmp(_PATH_WTMP, utp); | |
130 | # endif /* defined(HAVE_UPDWTMP) */ | |
131 | #endif /* defined(USE_UTMPX) */ | |
132 | ||
133 | /* Otherwise DIY */ | |
134 | #if (defined(USE_UTMPX) && !defined(HAVE_PUTUTXLINE)) || \ | |
135 | (!defined(USE_UTMPX) && !defined(HAVE_PUTUTLINE)) | |
136 | int fd; | |
beb43d31 | 137 | int tty; |
138 | ||
0d5f7abc | 139 | /* can't use ttyslot here, as that will not work for logout |
140 | * (record_logout() is called from the master sshd, which does | |
141 | * not have the correct tty on stdin/out, so ttyslot will return | |
142 | * "-1" or (worse) a wrong number | |
143 | */ | |
144 | tty = find_tty_slot(utp); | |
f74efc8d | 145 | |
25422c70 | 146 | #ifdef USE_UTMPX |
69134b9b | 147 | /* If no tty was found, append it to utmpx */ |
148 | if (tty == -1) { | |
149 | if ((fd = open(_PATH_UTMPX, O_WRONLY|O_APPEND, 0)) >= 0) { | |
150 | (void)write(fd, utp, sizeof(struct utmp)); | |
151 | (void)close(fd); | |
152 | return; | |
153 | } | |
154 | } | |
155 | /* Otherwise, tty was found - update at its location */ | |
25422c70 | 156 | fd = open(_PATH_UTMPX, O_RDWR|O_CREAT, 0644); |
157 | if (fd == -1) { | |
158 | log("Couldn't open %s: %s", _PATH_UTMPX, strerror(errno)); | |
69134b9b | 159 | return; |
160 | } | |
161 | lseek(fd, (off_t)(tty * sizeof(struct utmpx)), SEEK_SET); | |
162 | write(fd, utx, sizeof(struct utmpx)); | |
163 | close(fd); | |
164 | if ((fd = open(_PATH_WTMPX, O_WRONLY|O_APPEND, 0)) >= 0) { | |
165 | (void)write(fd, utx, sizeof(struct utmpx)); | |
166 | (void)close(fd); | |
167 | } | |
25422c70 | 168 | #else /* USE_UTMPX */ |
69134b9b | 169 | /* If no tty was found, append it to utmp */ |
170 | if (tty == -1) { | |
171 | if ((fd = open(_PATH_UTMP, O_WRONLY|O_APPEND, 0)) >= 0) { | |
0d5f7abc | 172 | (void)write(fd, utp, sizeof(struct utmp)); |
173 | (void)close(fd); | |
69134b9b | 174 | return; |
0d5f7abc | 175 | } |
beb43d31 | 176 | } |
69134b9b | 177 | /* Otherwise, tty was found - update at its location */ |
178 | fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644); | |
179 | if (fd == -1) { | |
180 | log("Couldn't open %s: %s", _PATH_UTMP, strerror(errno)); | |
181 | return; | |
182 | } | |
183 | lseek(fd, (off_t)(tty * sizeof(struct utmp)), SEEK_SET); | |
184 | write(fd, utp, sizeof(struct utmp)); | |
185 | close(fd); | |
beb43d31 | 186 | if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) { |
f498ed15 | 187 | (void)write(fd, utp, sizeof(struct utmp)); |
beb43d31 | 188 | (void)close(fd); |
189 | } | |
69134b9b | 190 | #endif /* USE_UTMPX */ |
191 | #endif /* (defined(USE_UTMPX) && !defined(HAVE_PUTUTXLINE)) || \ | |
192 | (!defined(USE_UTMPX) && !defined(HAVE_PUTUTLINE)) */ | |
beb43d31 | 193 | } |
194 | ||
195 | #endif /* HAVE_LOGIN */ |