2 * Portions Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 * Portions Copyright (c) 1996, Jason Downs. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include "lukemftpd.h"
37 typedef struct utmp UTMP;
40 static int topslot = -1;
43 * Special versions of login()/logout() which hold the utmp file open,
53 * First, loop through /etc/ttys, if needed, to initialize the
54 * top of the tty slots, since ftpd has no tty.
58 while (getttyent() != (struct ttyent *)NULL)
61 if ((topslot < 0) || ((fd < 0)
62 && (fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) < 0))
66 * Now find a slot that's not in use...
68 (void)lseek(fd, (off_t)(topslot * sizeof(UTMP)), SEEK_SET);
71 if (read(fd, &ubuf, sizeof(UTMP)) == sizeof(UTMP)) {
72 if (!ubuf.ut_name[0]) {
73 (void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR);
78 (void)lseek(fd, (off_t)(topslot * sizeof(UTMP)),
84 (void)write(fd, ut, sizeof(UTMP));
88 logout(const char *line)
97 (void)lseek(fd, 0, SEEK_SET);
99 while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) {
101 || strncmp(ut.ut_line, line, UT_LINESIZE))
103 memset(ut.ut_name, 0, UT_NAMESIZE);
104 memset(ut.ut_host, 0, UT_HOSTSIZE);
105 (void)time(&ut.ut_time);
106 (void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR);
107 (void)write(fd, &ut, sizeof(UTMP));