1 /*
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * %sccs.include.redist.c%
6 */
7
8 #if defined(LIBC_SCCS) && !defined(lint)
9 static char sccsid[] = "@(#)logout.c 8.1 (Berkeley) 06/04/93";
10 #endif /* LIBC_SCCS and not lint */
11
12 #include <sys/types.h>
13 #include <sys/time.h>
14
15 #include <fcntl.h>
16 #include <utmp.h>
17 #include <unistd.h>
18 #include <stdlib.h>
19 #include <string.h>
20
21 typedef struct utmp UTMP;
22
23 int
logout(line)24 logout(line)
25 register char *line;
26 {
27 register int fd;
28 UTMP ut;
29 int rval;
30
31 if ((fd = open(_PATH_UTMP, O_RDWR, 0)) < 0)
32 return(0);
33 rval = 0;
34 while (read(fd, &ut, sizeof(UTMP)) == sizeof(UTMP)) {
35 if (!ut.ut_name[0] || strncmp(ut.ut_line, line, UT_LINESIZE))
36 continue;
37 bzero(ut.ut_name, UT_NAMESIZE);
38 bzero(ut.ut_host, UT_HOSTSIZE);
39 (void)time(&ut.ut_time);
40 (void)lseek(fd, -(off_t)sizeof(UTMP), L_INCR);
41 (void)write(fd, &ut, sizeof(UTMP));
42 rval = 1;
43 }
44 (void)close(fd);
45 return(rval);
46 }
47