1 /* $NetBSD: logwtmp.c,v 1.22 2004/08/09 12:56:48 lukem 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 1.22 2004/08/09 12:56:48 lukem 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 <unistd.h> 55 #include <utmp.h> 56 #ifdef SUPPORT_UTMPX 57 #include <utmpx.h> 58 #endif 59 #include <util.h> 60 61 #ifdef KERBEROS5 62 #include <krb5/krb5.h> 63 #endif 64 65 #include "extern.h" 66 67 static int fd = -1; 68 #ifdef SUPPORT_UTMPX 69 static int fdx = -1; 70 #endif 71 72 /* 73 * Modified version of logwtmp that holds wtmp file open 74 * after first call, for use with ftp (which may chroot 75 * after login, but before logout). 76 */ 77 void 78 ftpd_logwtmp(const char *line, const char *name, const char *host) 79 { 80 struct utmp ut; 81 struct stat buf; 82 83 if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 84 return; 85 if (fstat(fd, &buf) == 0) { 86 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 87 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 88 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 89 (void)time(&ut.ut_time); 90 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 91 sizeof(struct utmp)) 92 (void)ftruncate(fd, buf.st_size); 93 } 94 } 95 96 #ifdef SUPPORT_UTMPX 97 void 98 ftpd_logwtmpx(const char *line, const char *name, const char *host, int status, int utx_type) 99 { 100 struct utmpx ut; 101 struct stat buf; 102 103 if (fdx < 0 && (fdx = open(_PATH_WTMPX, O_WRONLY|O_APPEND, 0)) < 0) 104 return; 105 if (fstat(fdx, &buf) == 0) { 106 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 107 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 108 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 109 ut.ut_type = utx_type; 110 if (WIFEXITED(status)) 111 ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status); 112 if (WIFSIGNALED(status)) 113 ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status); 114 (void)gettimeofday(&ut.ut_tv, NULL); 115 if(write(fdx, (char *)&ut, sizeof(struct utmpx)) != 116 sizeof(struct utmpx)) 117 (void)ftruncate(fdx, buf.st_size); 118 } 119 } 120 #endif 121