135457Sbostic /* 235457Sbostic * Copyright (c) 1988 The Regents of the University of California. 335457Sbostic * All rights reserved. 435457Sbostic * 535457Sbostic * Redistribution and use in source and binary forms are permitted 635457Sbostic * provided that the above copyright notice and this paragraph are 735457Sbostic * duplicated in all such forms and that any documentation, 835457Sbostic * advertising materials, and other materials related to such 935457Sbostic * distribution and use acknowledge that the software was developed 1035457Sbostic * by the University of California, Berkeley. The name of the 1135457Sbostic * University may not be used to endorse or promote products derived 1235457Sbostic * from this software without specific prior written permission. 1335457Sbostic * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 1435457Sbostic * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 1535457Sbostic * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 1635457Sbostic */ 1735457Sbostic 1835457Sbostic #if defined(LIBC_SCCS) && !defined(lint) 19*39179Sbostic static char sccsid[] = "@(#)logout.c 5.4 (Berkeley) 09/19/89"; 2035457Sbostic #endif /* LIBC_SCCS and not lint */ 2135457Sbostic 2235457Sbostic #include <sys/types.h> 2335457Sbostic #include <sys/file.h> 2435457Sbostic #include <sys/time.h> 2535457Sbostic #include <utmp.h> 2635457Sbostic 27*39179Sbostic typedef struct utmp UTMP; 2836826Sbostic 2935457Sbostic logout(line) 3035457Sbostic register char *line; 3135457Sbostic { 32*39179Sbostic register int fd; 33*39179Sbostic UTMP ut; 3435457Sbostic int rval; 35*39179Sbostic off_t lseek(); 3635457Sbostic time_t time(); 3735457Sbostic 38*39179Sbostic if ((fd = open(_PATH_UTMP, O_RDWR)) < 0) 3935457Sbostic return(0); 4036826Sbostic rval = 0; 41*39179Sbostic while (read(fd, (char *)&ut, sizeof(UTMP)) == sizeof(UTMP)) { 42*39179Sbostic if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE)) 4335457Sbostic continue; 44*39179Sbostic bzero(ut.ut_name, UT_NAMESIZE); 45*39179Sbostic bzero(ut.ut_host, UT_HOSTSIZE); 4635457Sbostic (void)time(&ut.ut_time); 47*39179Sbostic (void)lseek(fd, -(long)sizeof(UTMP), L_INCR); 48*39179Sbostic (void)write(fd, (char *)&ut, sizeof(UTMP)); 4936826Sbostic rval = 1; 5035457Sbostic } 51*39179Sbostic (void)close(fd); 5235457Sbostic return(rval); 5335457Sbostic } 54