1/* $NetBSD: logwtmp.c,v 1.24 2005/06/23 04:20:41 christos Exp $ */ 2 3/* 4 * Copyright (c) 1988, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 */ 32 33 34#include <sys/cdefs.h> 35#ifndef lint 36#if 0 37static char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93"; 38#else 39__RCSID("$NetBSD: logwtmp.c,v 1.24 2005/06/23 04:20:41 christos Exp $"); 40#endif 41#endif /* not lint */ 42 43#include <sys/types.h> 44#include <sys/param.h> 45#include <sys/time.h> 46#include <sys/stat.h> 47#include <sys/wait.h> 48 49#include <fcntl.h> 50#include <signal.h> 51#include <stdio.h> 52#include <string.h> 53#include <time.h> 54#include <syslog.h> 55#include <unistd.h> 56#ifdef SUPPORT_UTMP 57#include <utmp.h> 58#endif 59#ifdef SUPPORT_UTMPX 60#include <utmpx.h> 61#endif 62#include <util.h> 63 64#ifdef KERBEROS5 65#include <krb5/krb5.h> 66#endif 67 68#include "extern.h" 69 70#ifdef SUPPORT_UTMP 71static int fd = -1; 72 73void 74ftpd_initwtmp(void) 75{ 76 const char *wf = _PATH_WTMP; 77 if ((fd = open(wf, O_WRONLY|O_APPEND, 0)) == -1) 78 syslog(LOG_ERR, "Cannot open `%s' (%m)", wf); 79} 80 81/* 82 * Modified version of logwtmp that holds wtmp file open 83 * after first call, for use with ftp (which may chroot 84 * after login, but before logout). 85 */ 86void 87ftpd_logwtmp(const char *line, const char *name, const char *host) 88{ 89 struct utmp ut; 90 struct stat buf; 91 92 if (fd < 0) 93 return; 94 if (fstat(fd, &buf) == 0) { 95 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 96 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 97 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 98 (void)time(&ut.ut_time); 99 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 100 sizeof(struct utmp)) 101 (void)ftruncate(fd, buf.st_size); 102 } 103} 104#endif 105 106#ifdef SUPPORT_UTMPX 107static int fdx = -1; 108 109void 110ftpd_initwtmpx(void) 111{ 112 const char *wf = _PATH_WTMPX; 113 if ((fdx = open(wf, O_WRONLY|O_APPEND, 0)) == -1) 114 syslog(LOG_ERR, "Cannot open `%s' (%m)", wf); 115} 116 117void 118ftpd_logwtmpx(const char *line, const char *name, const char *host, 119 struct sockinet *haddr, int status, int utx_type) 120{ 121 struct utmpx ut; 122 struct stat buf; 123 124 if (fdx < 0) 125 return; 126 if (fstat(fdx, &buf) == 0) { 127 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 128 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 129 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 130 if (haddr) 131 (void)memcpy(&ut.ut_ss, &haddr->si_su, haddr->su_len); 132 else 133 (void)memset(&ut.ut_ss, 0, sizeof(ut.ut_ss)); 134 ut.ut_type = utx_type; 135 if (WIFEXITED(status)) 136 ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status); 137 if (WIFSIGNALED(status)) 138 ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status); 139 (void)gettimeofday(&ut.ut_tv, NULL); 140 if(write(fdx, (char *)&ut, sizeof(struct utmpx)) != 141 sizeof(struct utmpx)) 142 (void)ftruncate(fdx, buf.st_size); 143 } 144} 145#endif 146