1 /* 2 * Copyright (c) 1988 The Regents of the University of California. 3 * 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 35 #ifndef lint 36 static char sccsid[] = "@(#)logwtmp.c 5.7 (Berkeley) 2/25/91"; 37 #endif /* not lint */ 38 39 #include <sys/types.h> 40 #include <sys/time.h> 41 #include <sys/stat.h> 42 #include <fcntl.h> 43 #include <utmp.h> 44 #include <unistd.h> 45 #include <string.h> 46 47 static int fd = -1; 48 49 /* 50 * Modified version of logwtmp that holds wtmp file open 51 * after first call, for use with ftp (which may chroot 52 * after login, but before logout). 53 */ 54 logwtmp(line, name, host) 55 char *line, *name, *host; 56 { 57 struct utmp ut; 58 struct stat buf; 59 time_t time(); 60 char *strncpy(); 61 62 if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 63 return; 64 if (fstat(fd, &buf) == 0) { 65 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 66 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 67 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 68 (void)time(&ut.ut_time); 69 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 70 sizeof(struct utmp)) 71 (void)ftruncate(fd, buf.st_size); 72 } 73 } 74