1 /* 2 * Copyright (c) 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 #if 0 36 static char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93"; 37 #endif 38 static const char rcsid[] = 39 "$FreeBSD$"; 40 #endif /* not lint */ 41 42 #include <sys/types.h> 43 #include <sys/stat.h> 44 #include <netinet/in.h> 45 #include <arpa/inet.h> 46 #include <sys/socket.h> 47 48 #include <fcntl.h> 49 #include <time.h> 50 #include <netdb.h> 51 #include <utmp.h> 52 #include <unistd.h> 53 #include <stdio.h> 54 #include <string.h> 55 #include "extern.h" 56 57 static int fd = -1; 58 59 /* 60 * Modified version of logwtmp that holds wtmp file open 61 * after first call, for use with ftp (which may chroot 62 * after login, but before logout). 63 */ 64 void 65 ftpd_logwtmp(line, name, host) 66 char *line, *name, *host; 67 { 68 struct utmp ut; 69 struct stat buf; 70 71 if (strlen(host) > UT_HOSTSIZE) { 72 struct addrinfo hints, *res; 73 int error; 74 static char hostbuf[BUFSIZ]; 75 76 memset(&hints, 0, sizeof(hints)); 77 hints.ai_family = PF_UNSPEC; 78 error = getaddrinfo(host, NULL, &hints, &res); 79 if (error) 80 host = "invalid hostname"; 81 else { 82 getnameinfo(res->ai_addr, res->ai_addrlen, 83 hostbuf, sizeof(hostbuf), NULL, 0, 84 NI_NUMERICHOST); 85 host = hostbuf; 86 if (strlen(host) > UT_HOSTSIZE) 87 host[UT_HOSTSIZE] = '\0'; 88 } 89 } 90 91 if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 92 return; 93 if (fstat(fd, &buf) == 0) { 94 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 95 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 96 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 97 (void)time(&ut.ut_time); 98 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 99 sizeof(struct utmp)) 100 (void)ftruncate(fd, buf.st_size); 101 } 102 } 103