* added compilers lcc and bcc (linux86)
[mascara-docs.git] / compilers / linux86-0.16.17 / libbsd / logout.c
blob43b96c57b0d19f775adccf28454ccf1fe60d36ad
1 /*
2 * Copyright (c) 1988 The Regents of the University of California.
3 * All rights reserved.
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.
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.
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 */
38 #include <string.h>
39 #include <sys/types.h>
40 #include <sys/file.h>
41 #include <time.h>
42 #include <unistd.h>
43 #include <utmp.h>
46 typedef struct utmp UTMP;
48 logout(line)
49 register char *line;
51 register int fd;
52 UTMP ut;
53 int rval;
54 off_t lseek();
55 time_t time();
57 if ((fd = open(_PATH_UTMP, O_RDWR)) < 0)
58 return(0);
59 rval = 0;
60 while (read(fd, (char *)&ut, sizeof(UTMP)) == sizeof(UTMP)) {
61 if (!ut.ut_user[0] || strncmp(ut.ut_line, line, UT_LINESIZE))
62 continue;
63 ut.ut_type = DEAD_PROCESS;
64 (void)time(&ut.ut_time);
65 (void)lseek(fd, -(long)sizeof(UTMP), L_INCR);
66 (void)write(fd, (char *)&ut, sizeof(UTMP));
67 rval = 1;
69 (void)close(fd);
70 return(rval);