1 /* $NetBSD: logwtmp.c,v 1.25 2006/09/23 16:03:50 xtraeme 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 37 static char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93"; 38 #else 39 __RCSID("$NetBSD: logwtmp.c,v 1.25 2006/09/23 16:03:50 xtraeme 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 71 static int fd = -1; 72 73 void 74 ftpd_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 */ 86 void 87 ftpd_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 107 static int fdx = -1; 108 109 void 110 ftpd_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 } 116 117 void 118 ftpd_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