freebsd-src/include/utmp.h
Ed Schouten d47e6e6bd1 Add a comment to utmp.h about the sizes of UT_HOSTSIZE and UT_LINESIZE.
UT_HOSTSIZE and UT_LINESIZE are too small right now. If we ever bump
UT_HOSTSIZE, we must not forget to increase UT_LINESIZE as well. If we
add a comment, we're pretty sure we increase both values at the same
time.

PR:	bin/108743 (maybe others)
2008-11-16 14:43:33 +00:00

74 lines
2.9 KiB
C

/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)utmp.h 8.2 (Berkeley) 1/21/94
* $FreeBSD$
*/
#ifndef _UTMP_H_
#define _UTMP_H_
#define _PATH_UTMP "/var/run/utmp"
#define _PATH_WTMP "/var/log/wtmp"
#define _PATH_LASTLOG "/var/log/lastlog"
/*
* XXX: These values are too low, but cannot be changed without breaking
* the file format. Right now pts(4) is limited to 1000 instances,
* because /dev/pts/1000 would require UT_LINESIZE to be bigger.
* UT_HOSTSIZE is also too small to hold most common hostnames or IPv6
* addresses.
*/
#define UT_NAMESIZE 16 /* see MAXLOGNAME in <sys/param.h> */
#define UT_LINESIZE 8
#define UT_HOSTSIZE 16
struct lastlog {
int32_t ll_time;
char ll_line[UT_LINESIZE];
char ll_host[UT_HOSTSIZE];
};
struct utmp {
char ut_line[UT_LINESIZE];
char ut_name[UT_NAMESIZE];
char ut_host[UT_HOSTSIZE];
int32_t ut_time;
};
#endif /* !_UTMP_H_ */