logwtmp.c revision 50476
1119679Smbr/* 2119679Smbr * Copyright (c) 1988, 1993 3119679Smbr * The Regents of the University of California. All rights reserved. 4119679Smbr * 5119679Smbr * Redistribution and use in source and binary forms, with or without 6119679Smbr * modification, are permitted provided that the following conditions 7119679Smbr * are met: 8119679Smbr * 1. Redistributions of source code must retain the above copyright 9119679Smbr * notice, this list of conditions and the following disclaimer. 10119679Smbr * 2. Redistributions in binary form must reproduce the above copyright 11119679Smbr * notice, this list of conditions and the following disclaimer in the 12119679Smbr * documentation and/or other materials provided with the distribution. 13119679Smbr * 3. All advertising materials mentioning features or use of this software 14119679Smbr * must display the following acknowledgement: 15119679Smbr * This product includes software developed by the University of 16119679Smbr * California, Berkeley and its contributors. 17119679Smbr * 4. Neither the name of the University nor the names of its contributors 18119679Smbr * may be used to endorse or promote products derived from this software 19119679Smbr * without specific prior written permission. 20119679Smbr * 21119679Smbr * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22119679Smbr * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23119679Smbr * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24119679Smbr * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25119679Smbr * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26119679Smbr * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27119679Smbr * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28119679Smbr * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29119679Smbr * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30119679Smbr * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31119679Smbr * SUCH DAMAGE. 32119679Smbr */ 33119679Smbr 34119679Smbr#ifndef lint 35119679Smbr#if 0 36119679Smbrstatic char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93"; 37119679Smbr#endif 38119679Smbrstatic const char rcsid[] = 39119679Smbr "$FreeBSD: head/libexec/ftpd/logwtmp.c 50476 1999-08-28 00:22:10Z peter $"; 40119679Smbr#endif /* not lint */ 41119679Smbr 42119679Smbr#include <sys/types.h> 43119679Smbr#include <sys/stat.h> 44119679Smbr#include <netinet/in.h> 45119679Smbr#include <arpa/inet.h> 46119679Smbr 47119679Smbr#include <fcntl.h> 48119679Smbr#include <time.h> 49119679Smbr#include <netdb.h> 50119679Smbr#include <utmp.h> 51119679Smbr#include <unistd.h> 52119679Smbr#include <stdio.h> 53119679Smbr#include <string.h> 54119679Smbr#include "extern.h" 55119679Smbr 56119679Smbrstatic int fd = -1; 57119679Smbr 58119679Smbr/* 59119679Smbr * Modified version of logwtmp that holds wtmp file open 60119679Smbr * after first call, for use with ftp (which may chroot 61119679Smbr * after login, but before logout). 62119679Smbr */ 63119679Smbrvoid 64119679Smbrftpd_logwtmp(line, name, host) 65119679Smbr char *line, *name, *host; 66119679Smbr{ 67119679Smbr struct utmp ut; 68119679Smbr struct stat buf; 69119679Smbr 70119679Smbr if (strlen(host) > UT_HOSTSIZE) { 71119679Smbr struct hostent *hp = gethostbyname(host); 72119679Smbr 73119679Smbr if (hp != NULL) { 74119679Smbr struct in_addr in; 75119679Smbr 76119679Smbr memmove(&in, hp->h_addr, sizeof(in)); 77119679Smbr host = inet_ntoa(in); 78119679Smbr } else 79119679Smbr host = "invalid hostname"; 80119679Smbr } 81119679Smbr 82119679Smbr if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 83119679Smbr return; 84119679Smbr if (fstat(fd, &buf) == 0) { 85119679Smbr (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 86119679Smbr (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 87119679Smbr (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 88119679Smbr (void)time(&ut.ut_time); 89119679Smbr if (write(fd, (char *)&ut, sizeof(struct utmp)) != 90119679Smbr sizeof(struct utmp)) 91119679Smbr (void)ftruncate(fd, buf.st_size); 92119679Smbr } 93119679Smbr} 94119679Smbr