1 /* 2 * Portions 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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 /* 31 * Portions Copyright (c) 1996, Jason Downs. All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 42 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 43 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 44 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 45 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, 46 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 47 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 48 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 49 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 */ 54 55 #include <sys/types.h> 56 #include <sys/param.h> 57 58 #include <fcntl.h> 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include <ttyent.h> 63 #include <unistd.h> 64 #include <utmp.h> 65 #ifdef SUPPORT_UTMPX 66 #include <utmpx.h> 67 #endif 68 #include <util.h> 69 70 #include "extern.h" 71 72 typedef struct utmp UTMP; 73 74 static int fd = -1; 75 static int topslot = -1; 76 77 /* 78 * Special versions of login()/logout() which hold the utmp file open, 79 * for use with ftpd. 80 */ 81 82 void 83 ftpd_login(const struct utmp *ut) 84 { 85 UTMP ubuf; 86 87 /* 88 * First, loop through /etc/ttys, if needed, to initialize the 89 * top of the tty slots, since ftpd has no tty. 90 */ 91 if (topslot < 0) { 92 topslot = 0; 93 while (getttyent() != (struct ttyent *)NULL) 94 topslot++; 95 } 96 if ((topslot < 0) || ((fd < 0) 97 && (fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) < 0)) 98 return; 99 100 /* 101 * Now find a slot that's not in use... 102 */ 103 (void)lseek(fd, (off_t)(topslot * sizeof(UTMP)), SEEK_SET); 104 105 while (1) { 106 if (read(fd, &ubuf, sizeof(UTMP)) == sizeof(UTMP)) { 107 if (!ubuf.ut_name[0]) { 108 (void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR); 109 break; 110 } 111 topslot++; 112 } else { 113 (void)lseek(fd, (off_t)(topslot * sizeof(UTMP)), 114 SEEK_SET); 115 break; 116 } 117 } 118 119 (void)write(fd, ut, sizeof(UTMP)); 120 } 121 122 int 123 ftpd_logout(const char *line) 124 { 125 UTMP ut; 126 int rval; 127 128 rval = 0; 129 if (fd < 0) 130 return(rval); 131 132 (void)lseek(fd, 0, SEEK_SET); 133 134 while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) { 135 if (!ut.ut_name[0] 136 || strncmp(ut.ut_line, line, UT_LINESIZE)) 137 continue; 138 memset(ut.ut_name, 0, UT_NAMESIZE); 139 memset(ut.ut_host, 0, UT_HOSTSIZE); 140 (void)time(&ut.ut_time); 141 (void)lseek(fd, -(off_t)sizeof(UTMP), SEEK_CUR); 142 (void)write(fd, &ut, sizeof(UTMP)); 143 rval = 1; 144 } 145 return(rval); 146 } 147 148 #ifdef SUPPORT_UTMPX 149 /* 150 * special version of loginx which updates utmpx only. 151 */ 152 void 153 ftpd_loginx(const struct utmpx *ut) 154 { 155 (void)pututxline(ut); 156 } 157 #endif 158