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 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)logout.c 5.5 (Berkeley) 6/1/90"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <sys/types.h> 39 #include <sys/file.h> 40 #include <sys/time.h> 41 #include <utmp.h> 42 43 typedef struct utmp UTMP; 44 45 logout(line) 46 register char *line; 47 { 48 register int fd; 49 UTMP ut; 50 int rval; 51 off_t lseek(); 52 time_t time(); 53 54 if ((fd = open(_PATH_UTMP, O_RDWR)) < 0) 55 return(0); 56 rval = 0; 57 while (read(fd, (char *)&ut, sizeof(UTMP)) == sizeof(UTMP)) { 58 if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE)) 59 continue; 60 bzero(ut.ut_name, UT_NAMESIZE); 61 bzero(ut.ut_host, UT_HOSTSIZE); 62 (void)time(&ut.ut_time); 63 (void)lseek(fd, -(long)sizeof(UTMP), L_INCR); 64 (void)write(fd, (char *)&ut, sizeof(UTMP)); 65 rval = 1; 66 } 67 (void)close(fd); 68 return(rval); 69 } 70