1 /* $OpenBSD: logwtmp.c,v 1.4 2001/01/28 19:34:27 niklas Exp $ */ 2 /* $NetBSD: logwtmp.c,v 1.4 1995/04/11 02:44:58 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1988, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 */ 37 38 #ifndef lint 39 #if 0 40 static char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93"; 41 #else 42 static char rcsid[] = "$OpenBSD: logwtmp.c,v 1.4 2001/01/28 19:34:27 niklas Exp $"; 43 #endif 44 #endif /* not lint */ 45 46 #include <sys/types.h> 47 #include <sys/time.h> 48 #include <sys/stat.h> 49 50 #include <fcntl.h> 51 #include <utmp.h> 52 #include <unistd.h> 53 #include <stdio.h> 54 #include <string.h> 55 56 #include <netinet/in.h> 57 #include "extern.h" 58 59 static int fd = -1; 60 61 /* 62 * Modified version of logwtmp that holds wtmp file open 63 * after first call, for use with ftp (which may chroot 64 * after login, but before logout). 65 */ 66 void 67 ftpdlogwtmp(line, name, host) 68 char *line, *name, *host; 69 { 70 struct utmp ut; 71 struct stat buf; 72 73 if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 74 return; 75 if (fstat(fd, &buf) == 0) { 76 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 77 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 78 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 79 (void)time(&ut.ut_time); 80 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 81 sizeof(struct utmp)) 82 (void)ftruncate(fd, buf.st_size); 83 } 84 } 85