92ccb9a78d
available (closefrom() was added to FreeBSD in 8.0-release). The selection is made at compile-time, as I still compile a FreeBSD-based version of lpr&friends on other platforms. While testing I out that (at least on my system) lpd has been closing 11095 fd's, when there are only 6 fd's open. The old code took 120 times more clocktime than calling closefrom(). (although that was still less than 2/1000-ths of a second!) Reviewed by: jilles MFC after: 2 weeks
123 lines
4.3 KiB
C
123 lines
4.3 KiB
C
/*-
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* ------+---------+---------+---------+---------+---------+---------+---------*
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* Copyright (c) 2003,2013 - Garance Alistair Drosehn <gad@FreeBSD.org>.
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* All rights reserved.
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation
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* are those of the authors and should not be interpreted as representing
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* official policies, either expressed or implied, of the FreeBSD Project.
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*
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* ------+---------+---------+---------+---------+---------+---------+---------*
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* $FreeBSD$
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* ------+---------+---------+---------+---------+---------+---------+---------*
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*/
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/*
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* The main goal of this include file is to provide a platform-neutral way
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* to define some macros that lpr wants from FreeBSD's <sys/cdefs.h>. This
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* will simply use the standard <sys/cdefs.h> when compiled in FreeBSD, but
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* other OS's may not have /usr/include/sys/cdefs.h (or even if that file
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* exists, it may not define all the macros that lpr will use).
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*/
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#if !defined(_LP_CDEFS_H_)
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#define _LP_CDEFS_H_
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/*
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* For non-BSD platforms, you can compile lpr with -DHAVE_SYS_CDEFS_H
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* if <sys/cdefs.h> should be included.
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*/
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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# define HAVE_SYS_CDEFS_H
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#endif
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#if defined(HAVE_SYS_CDEFS_H)
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# include <sys/cdefs.h>
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#endif
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/*
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* FreeBSD added a closefrom() routine in release 8.0. When compiling
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* `lpr' on other platforms you might want to include bsd-closefrom.c
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* from the portable-openssh project.
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*/
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#ifndef USE_CLOSEFROM
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# if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
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# define USE_CLOSEFROM 1
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# endif
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#endif
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/* The macro USE_CLOSEFROM must be defined with a value of 0 or 1. */
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#ifndef USE_CLOSEFROM
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# define USE_CLOSEFROM 0
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#endif
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/*
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* __unused is a compiler-specific trick which can be used to avoid
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* warnings about a variable which is defined but never referenced.
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* Some lpr files use this, so define a null version if it was not
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* defined by <sys/cdefs.h>.
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*/
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#if !defined(__unused)
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# define __unused
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#endif
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/*
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* All the lpr source files will want to reference __FBSDID() to
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* handle rcs id's.
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*/
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#if !defined(__FBSDID)
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# if defined(lint) || defined(STRIP_FBSDID)
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# define __FBSDID(s) struct skip_rcsid_struct
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# elif defined(__IDSTRING) /* NetBSD */
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# define __FBSDID(s) __IDSTRING(rcsid,s)
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# else
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# define __FBSDID(s) static const char rcsid[] __unused = s
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# endif
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#endif /* __FBSDID */
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/*
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* Some lpr include files use __BEGIN_DECLS and __END_DECLS.
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*/
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#if !defined(__BEGIN_DECLS)
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# if defined(__cplusplus)
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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# else
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# define __BEGIN_DECLS
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# define __END_DECLS
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# endif
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#endif
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/*
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* __printflike and __printf0like are a compiler-specific tricks to
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* tell the compiler to check the format-codes in printf-like
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* routines wrt the args that will be formatted.
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*/
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#if !defined(__printflike)
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# define __printflike(fmtarg, firstvararg)
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#endif
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#if !defined(__printf0like)
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# define __printf0like(fmtarg, firstvararg)
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#endif
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#endif /* !_LP_CDEFS_H_ */
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