home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Software Vault: The Gold Collection
/
Software Vault - The Gold Collection (American Databankers) (1993).ISO
/
cdr26
/
netprog.zip
/
NETPROG.TAR
/
rlogin
/
logout.c
next >
Wrap
C/C++ Source or Header
|
1989-12-17
|
2KB
|
58 lines
/*
* Copyright (c) 1988 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)logout.c 5.2 (Berkeley) 2/17/89";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <sys/file.h>
#include <sys/time.h>
#include <utmp.h>
#include <stdio.h>
#define UTMPFILE "/etc/utmp"
/* 0 on failure, 1 on success */
logout(line)
register char *line;
{
register FILE *fp;
struct utmp ut;
int rval;
time_t time();
if (!(fp = fopen(UTMPFILE, "r+")))
return(0);
rval = 0;
while (fread((char *)&ut, sizeof(struct utmp), 1, fp) == 1) {
if (!ut.ut_name[0] ||
strncmp(ut.ut_line, line, sizeof(ut.ut_line)))
continue;
bzero(ut.ut_name, sizeof(ut.ut_name));
bzero(ut.ut_host, sizeof(ut.ut_host));
(void)time(&ut.ut_time);
(void)fseek(fp, (long)-sizeof(struct utmp), L_INCR);
(void)fwrite((char *)&ut, sizeof(struct utmp), 1, fp);
(void)fseek(fp, (long)0, L_INCR);
rval = 1;
}
(void)fclose(fp);
return(rval);
}