/* $OpenBSD: logutmp.c,v 1.11 2008/06/30 12:03:51 ragge Exp $ */ /* * Portions Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * Portions Copyright (c) 1996, Jason Downs. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "monitor.h" #include "extern.h" static int fd = -1; static int topslot = -1; /* * Special versions of login()/logout() which hold the utmp file open, * for use with ftpd. */ void ftpd_login(struct utmp *ut) { struct utmp ubuf; /* * First, loop through /etc/ttys, if needed, to initialize the * top of the tty slots, since ftpd has no tty. */ if (topslot < 0) { topslot = 0; while (getttyent() != (struct ttyent *)NULL) topslot++; } if ((topslot < 0) || ((fd < 0) && (fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) < 0)) return; /* * Now find a slot that's not in use... */ (void)lseek(fd, (off_t)(topslot * sizeof(struct utmp)), SEEK_SET); while (1) { if (read(fd, &ubuf, sizeof(struct utmp)) == sizeof(struct utmp)) { if (!ubuf.ut_name[0]) { (void)lseek(fd, -(off_t)sizeof(struct utmp), SEEK_CUR); break; } topslot++; } else { (void)lseek(fd, (off_t)(topslot * sizeof(struct utmp)), SEEK_SET); break; } } (void)write(fd, ut, sizeof(struct utmp)); } int ftpd_logout(char *line) { struct timeval tv; struct utmp ut; int rval; rval = 0; if (fd < 0) return(rval); (void)lseek(fd, 0, SEEK_SET); while (read(fd, &ut, sizeof(struct utmp)) == sizeof(struct utmp)) { if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE)) continue; bzero(ut.ut_name, UT_NAMESIZE); bzero(ut.ut_host, UT_HOSTSIZE); gettimeofday(&tv, NULL); ut.ut_time = tv.tv_sec; (void)lseek(fd, -(off_t)sizeof(struct utmp), SEEK_CUR); (void)write(fd, &ut, sizeof(struct utmp)); rval = 1; } return(rval); }