/* $OpenBSD: logwtmp.c,v 1.9 2004/11/28 20:24:51 deraadt Exp $ */ /* $NetBSD: logwtmp.c,v 1.4 1995/04/11 02:44:58 cgd Exp $ */ /* * Copyright (c) 1988, 1993 * The Regents of the University of California. 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. * */ #ifndef lint #if 0 static const char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93"; #else static const char rcsid[] = "$OpenBSD: logwtmp.c,v 1.9 2004/11/28 20:24:51 deraadt Exp $"; #endif #endif /* not lint */ #include <sys/types.h> #include <sys/time.h> #include <sys/stat.h> #include <fcntl.h> #include <utmp.h> #include <unistd.h> #include <stdio.h> #include <string.h> #include <netinet/in.h> #include "extern.h" static int fd = -1; /* * Modified version of logwtmp that holds wtmp file open * after first call, for use with ftp (which may chroot * after login, but before logout). */ void ftpdlogwtmp(char *line, char *name, char *host) { struct timeval tv; struct stat buf; struct utmp ut; if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) return; if (fstat(fd, &buf) == 0) { (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); gettimeofday(&tv, NULL); ut.ut_time = tv.tv_sec; if (write(fd, (char *)&ut, sizeof(struct utmp)) != sizeof(struct utmp)) (void)ftruncate(fd, buf.st_size); } }