1 /* $NetBSD: logwtmp.c,v 1.21 2003/08/07 09:46:40 agc 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 1.21 2003/08/07 09:46:40 agc 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 <setjmp.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #include <string.h> 54 #include <time.h> 55 #include <unistd.h> 56 #include <utmp.h> 57 #ifdef SUPPORT_UTMPX 58 #include <utmpx.h> 59 #endif 60 #include <util.h> 61 62 #ifdef KERBEROS5 63 #include <krb5/krb5.h> 64 #endif 65 66 #include "extern.h" 67 68 static int fd = -1; 69 #ifdef SUPPORT_UTMPX 70 static int fdx = -1; 71 #endif 72 73 /* 74 * Modified version of logwtmp that holds wtmp file open 75 * after first call, for use with ftp (which may chroot 76 * after login, but before logout). 77 */ 78 void 79 ftpd_logwtmp(const char *line, const char *name, const char *host) 80 { 81 struct utmp ut; 82 struct stat buf; 83 84 if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) 85 return; 86 if (fstat(fd, &buf) == 0) { 87 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 88 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 89 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 90 (void)time(&ut.ut_time); 91 if (write(fd, (char *)&ut, sizeof(struct utmp)) != 92 sizeof(struct utmp)) 93 (void)ftruncate(fd, buf.st_size); 94 } 95 } 96 97 #ifdef SUPPORT_UTMPX 98 void 99 ftpd_logwtmpx(const char *line, const char *name, const char *host, int status, int utx_type) 100 { 101 struct utmpx ut; 102 struct stat buf; 103 104 if (fdx < 0 && (fdx = open(_PATH_WTMPX, O_WRONLY|O_APPEND, 0)) < 0) 105 return; 106 if (fstat(fdx, &buf) == 0) { 107 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line)); 108 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name)); 109 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host)); 110 ut.ut_type = utx_type; 111 if (WIFEXITED(status)) 112 ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status); 113 if (WIFSIGNALED(status)) 114 ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status); 115 (void)gettimeofday(&ut.ut_tv, NULL); 116 if(write(fdx, (char *)&ut, sizeof(struct utmpx)) != 117 sizeof(struct utmpx)) 118 (void)ftruncate(fdx, buf.st_size); 119 } 120 } 121 #endif 122