logwtmp.c revision 56668
11592Srgrimes/* 21592Srgrimes * Copyright (c) 1988, 1993 31592Srgrimes * The Regents of the University of California. All rights reserved. 41592Srgrimes * 51592Srgrimes * Redistribution and use in source and binary forms, with or without 61592Srgrimes * modification, are permitted provided that the following conditions 71592Srgrimes * are met: 81592Srgrimes * 1. Redistributions of source code must retain the above copyright 91592Srgrimes * notice, this list of conditions and the following disclaimer. 101592Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111592Srgrimes * notice, this list of conditions and the following disclaimer in the 121592Srgrimes * documentation and/or other materials provided with the distribution. 131592Srgrimes * 3. All advertising materials mentioning features or use of this software 141592Srgrimes * must display the following acknowledgement: 151592Srgrimes * This product includes software developed by the University of 161592Srgrimes * California, Berkeley and its contributors. 171592Srgrimes * 4. Neither the name of the University nor the names of its contributors 181592Srgrimes * may be used to endorse or promote products derived from this software 191592Srgrimes * without specific prior written permission. 201592Srgrimes * 211592Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221592Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231592Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241592Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251592Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261592Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271592Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281592Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291592Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301592Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311592Srgrimes * SUCH DAMAGE. 321592Srgrimes */ 331592Srgrimes 341592Srgrimes#ifndef lint 3531329Scharnier#if 0 361592Srgrimesstatic char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93"; 3731329Scharnier#endif 3831329Scharnierstatic const char rcsid[] = 3950476Speter "$FreeBSD: head/libexec/ftpd/logwtmp.c 56668 2000-01-27 09:28:38Z shin $"; 401592Srgrimes#endif /* not lint */ 411592Srgrimes 421592Srgrimes#include <sys/types.h> 431592Srgrimes#include <sys/stat.h> 4416433Sache#include <netinet/in.h> 4516433Sache#include <arpa/inet.h> 4656668Sshin#include <sys/socket.h> 471592Srgrimes 481592Srgrimes#include <fcntl.h> 4916433Sache#include <time.h> 5016433Sache#include <netdb.h> 511592Srgrimes#include <utmp.h> 521592Srgrimes#include <unistd.h> 531592Srgrimes#include <stdio.h> 541592Srgrimes#include <string.h> 551592Srgrimes#include "extern.h" 561592Srgrimes 571592Srgrimesstatic int fd = -1; 581592Srgrimes 591592Srgrimes/* 601592Srgrimes * Modified version of logwtmp that holds wtmp file open 611592Srgrimes * after first call, for use with ftp (which may chroot 621592Srgrimes * after login, but before logout). 631592Srgrimes */ 641592Srgrimesvoid 6529140Stgftpd_logwtmp(line, name, host) 661592Srgrimes char *line, *name, *host; 671592Srgrimes{ 681592Srgrimes struct utmp ut; 691592Srgrimes struct stat buf; 701592Srgrimes 7116433Sache if (strlen(host) > UT_HOSTSIZE) { 7256668Sshin struct addrinfo hints, *res; 7356668Sshin int error; 7456668Sshin static char hostbuf[BUFSIZ]; 7516433Sache 7656668Sshin memset(&hints, 0, sizeof(hints)); 7756668Sshin hints.ai_family = PF_UNSPEC; 7856668Sshin error = getaddrinfo(host, NULL, &hints, &res); 7956668Sshin if (error) 8016433Sache host = "invalid hostname"; 8156668Sshin else { 8256668Sshin getnameinfo(res->ai_addr, res->ai_addrlen, 8356668Sshin hostbuf, sizeof(hostbuf), NULL, 0, 8456668Sshin NI_NUMERICHOST); 8556668Sshin host = hostbuf; 8656668Sshin if (strlen(host) > UT_HOSTSIZE) 8756668Sshin host[UT_HOSTSIZE] = '\0'; 8856668Sshin } 8916433Sache } 9016433Sache 911592Srgrimes if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 921592Srgrimes return; 931592Srgrimes if (fstat(fd, &buf) == 0) { 941592Srgrimes (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 951592Srgrimes (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 961592Srgrimes (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 971592Srgrimes (void)time(&ut.ut_time); 981592Srgrimes if (write(fd, (char *)&ut, sizeof(struct utmp)) != 991592Srgrimes sizeof(struct utmp)) 1001592Srgrimes (void)ftruncate(fd, buf.st_size); 1011592Srgrimes } 1021592Srgrimes} 103