logutmp.c revision 1.6 1 1.1 lukem /*
2 1.1 lukem * Portions Copyright (c) 1988, 1993
3 1.1 lukem * The Regents of the University of California. All rights reserved.
4 1.6 agc *
5 1.6 agc * Redistribution and use in source and binary forms, with or without
6 1.6 agc * modification, are permitted provided that the following conditions
7 1.6 agc * are met:
8 1.6 agc * 1. Redistributions of source code must retain the above copyright
9 1.6 agc * notice, this list of conditions and the following disclaimer.
10 1.6 agc * 2. Redistributions in binary form must reproduce the above copyright
11 1.6 agc * notice, this list of conditions and the following disclaimer in the
12 1.6 agc * documentation and/or other materials provided with the distribution.
13 1.6 agc * 3. Neither the name of the University nor the names of its contributors
14 1.6 agc * may be used to endorse or promote products derived from this software
15 1.6 agc * without specific prior written permission.
16 1.6 agc *
17 1.6 agc * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 1.6 agc * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 1.6 agc * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 1.6 agc * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 1.6 agc * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 1.6 agc * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 1.6 agc * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 1.6 agc * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 1.6 agc * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 1.6 agc * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 1.6 agc * SUCH DAMAGE.
28 1.6 agc */
29 1.6 agc
30 1.6 agc /*
31 1.1 lukem * Portions Copyright (c) 1996, Jason Downs. All rights reserved.
32 1.1 lukem *
33 1.1 lukem * Redistribution and use in source and binary forms, with or without
34 1.1 lukem * modification, are permitted provided that the following conditions
35 1.1 lukem * are met:
36 1.1 lukem * 1. Redistributions of source code must retain the above copyright
37 1.1 lukem * notice, this list of conditions and the following disclaimer.
38 1.1 lukem * 2. Redistributions in binary form must reproduce the above copyright
39 1.1 lukem * notice, this list of conditions and the following disclaimer in the
40 1.1 lukem * documentation and/or other materials provided with the distribution.
41 1.1 lukem * 3. All advertising materials mentioning features or use of this software
42 1.1 lukem * must display the following acknowledgement:
43 1.1 lukem * This product includes software developed by the University of
44 1.1 lukem * California, Berkeley and its contributors.
45 1.1 lukem * 4. Neither the name of the University nor the names of its contributors
46 1.1 lukem * may be used to endorse or promote products derived from this software
47 1.1 lukem * without specific prior written permission.
48 1.1 lukem *
49 1.1 lukem * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 1.1 lukem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 1.1 lukem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 1.1 lukem * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 1.1 lukem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 1.1 lukem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 1.1 lukem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 1.1 lukem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 1.1 lukem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 1.1 lukem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 1.1 lukem * SUCH DAMAGE.
60 1.1 lukem */
61 1.1 lukem
62 1.1 lukem #include <sys/types.h>
63 1.4 lukem #include <sys/param.h>
64 1.1 lukem
65 1.1 lukem #include <fcntl.h>
66 1.4 lukem #include <setjmp.h>
67 1.1 lukem #include <stdio.h>
68 1.1 lukem #include <stdlib.h>
69 1.1 lukem #include <string.h>
70 1.1 lukem #include <ttyent.h>
71 1.1 lukem #include <unistd.h>
72 1.1 lukem #include <utmp.h>
73 1.5 tacha #ifdef SUPPORT_UTMPX
74 1.5 tacha #include <utmpx.h>
75 1.5 tacha #endif
76 1.1 lukem #include <util.h>
77 1.1 lukem
78 1.4 lukem #include "extern.h"
79 1.4 lukem
80 1.1 lukem typedef struct utmp UTMP;
81 1.1 lukem
82 1.1 lukem static int fd = -1;
83 1.1 lukem static int topslot = -1;
84 1.1 lukem
85 1.1 lukem /*
86 1.1 lukem * Special versions of login()/logout() which hold the utmp file open,
87 1.1 lukem * for use with ftpd.
88 1.1 lukem */
89 1.1 lukem
90 1.1 lukem void
91 1.4 lukem ftpd_login(const struct utmp *ut)
92 1.1 lukem {
93 1.1 lukem UTMP ubuf;
94 1.1 lukem
95 1.1 lukem /*
96 1.1 lukem * First, loop through /etc/ttys, if needed, to initialize the
97 1.1 lukem * top of the tty slots, since ftpd has no tty.
98 1.1 lukem */
99 1.1 lukem if (topslot < 0) {
100 1.1 lukem topslot = 0;
101 1.1 lukem while (getttyent() != (struct ttyent *)NULL)
102 1.1 lukem topslot++;
103 1.1 lukem }
104 1.1 lukem if ((topslot < 0) || ((fd < 0)
105 1.1 lukem && (fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) < 0))
106 1.3 lukem return;
107 1.1 lukem
108 1.1 lukem /*
109 1.1 lukem * Now find a slot that's not in use...
110 1.1 lukem */
111 1.1 lukem (void)lseek(fd, (off_t)(topslot * sizeof(UTMP)), SEEK_SET);
112 1.1 lukem
113 1.1 lukem while (1) {
114 1.1 lukem if (read(fd, &ubuf, sizeof(UTMP)) == sizeof(UTMP)) {
115 1.1 lukem if (!ubuf.ut_name[0]) {
116 1.1 lukem (void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR);
117 1.1 lukem break;
118 1.1 lukem }
119 1.1 lukem topslot++;
120 1.1 lukem } else {
121 1.1 lukem (void)lseek(fd, (off_t)(topslot * sizeof(UTMP)),
122 1.1 lukem SEEK_SET);
123 1.1 lukem break;
124 1.1 lukem }
125 1.1 lukem }
126 1.1 lukem
127 1.1 lukem (void)write(fd, ut, sizeof(UTMP));
128 1.1 lukem }
129 1.1 lukem
130 1.1 lukem int
131 1.4 lukem ftpd_logout(const char *line)
132 1.1 lukem {
133 1.1 lukem UTMP ut;
134 1.1 lukem int rval;
135 1.1 lukem
136 1.1 lukem rval = 0;
137 1.1 lukem if (fd < 0)
138 1.1 lukem return(rval);
139 1.1 lukem
140 1.1 lukem (void)lseek(fd, 0, SEEK_SET);
141 1.1 lukem
142 1.1 lukem while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) {
143 1.1 lukem if (!ut.ut_name[0]
144 1.1 lukem || strncmp(ut.ut_line, line, UT_LINESIZE))
145 1.1 lukem continue;
146 1.1 lukem memset(ut.ut_name, 0, UT_NAMESIZE);
147 1.1 lukem memset(ut.ut_host, 0, UT_HOSTSIZE);
148 1.1 lukem (void)time(&ut.ut_time);
149 1.1 lukem (void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR);
150 1.1 lukem (void)write(fd, &ut, sizeof(UTMP));
151 1.1 lukem rval = 1;
152 1.1 lukem }
153 1.1 lukem return(rval);
154 1.1 lukem }
155 1.5 tacha
156 1.5 tacha #ifdef SUPPORT_UTMPX
157 1.5 tacha /*
158 1.5 tacha * special version of loginx which updates utmpx only.
159 1.5 tacha */
160 1.5 tacha void
161 1.5 tacha ftpd_loginx(const struct utmpx *ut)
162 1.5 tacha {
163 1.5 tacha (void)pututxline(ut);
164 1.5 tacha }
165 1.5 tacha #endif
166