16e3bec279
(the utmpentry.c code), specifically with respect to who owns them and when to free them. Now they're owned by utmpentry.c, only. Abolish the freeutentries() function, which was the wrong abstraction; add instead endutentries(), which flushes out the internally managed memory. Update callers as necessary. Some (e.g. talkd) had been leaking memory; others (e.g. syslogd) had been accidentally freeing and reloading utmp more often than necessary. There are a couple untidy bits in users and rwhod that someone should look after sometime, maybe. Fixes PR bin/35131, which was about talkd's memory leak.
77 lines
2.7 KiB
C
77 lines
2.7 KiB
C
/* $NetBSD: utmpentry.h,v 1.7 2008/07/13 20:07:49 dholland Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(SUPPORT_UTMPX)
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# include <utmpx.h>
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# define WHO_NAME_LEN _UTX_USERSIZE
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# define WHO_LINE_LEN _UTX_LINESIZE
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# define WHO_HOST_LEN _UTX_HOSTSIZE
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#elif defined(SUPPORT_UTMP)
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# include <utmp.h>
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# define WHO_NAME_LEN UT_NAMESIZE
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# define WHO_LINE_LEN UT_LINESIZE
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# define WHO_HOST_LEN UT_HOSTSIZE
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#else
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# error Either SUPPORT_UTMPX or SUPPORT_UTMP must be defined!
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#endif
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struct utmpentry {
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char name[WHO_NAME_LEN + 1];
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char line[WHO_LINE_LEN + 1];
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char host[WHO_HOST_LEN + 1];
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struct timeval tv;
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pid_t pid;
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uint16_t term;
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uint16_t exit;
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uint16_t sess;
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uint16_t type;
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struct utmpentry *next;
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};
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extern int maxname, maxline, maxhost;
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extern int etype;
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/*
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* getutentries provides a linked list of struct utmpentry and returns
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* the number of entries. The first argument, if not null, names an
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* alternate utmp(x) file to look in.
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*
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* The memory returned by getutentries belongs to getutentries. The
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* list returned (or elements of it) may be returned again later if
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* utmp hasn't changed in the meantime.
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*
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* endutentries clears and frees the cached data.
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*/
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int getutentries(const char *, struct utmpentry **);
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void endutentries(void);
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