general clean-up; Christian Weisgerber <naddy@unix-ag.uni-kl.de>
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marc
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@ -3,16 +3,17 @@
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# Date created: 17 Dec 1997
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# Whom: joey
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#
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# $OpenBSD: Makefile,v 1.1.1.1 1997/12/17 23:11:45 joey Exp $
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# $OpenBSD: Makefile,v 1.2 1999/03/11 20:19:28 marc Exp $
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#
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DISTNAME= buffer-1.17
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CATEGORIES= misc
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MASTER_SITES= ftp://ftp.sun.ac.za/pub/unix/misc/
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MASTER_SITES= ftp://ftp.openbsd.org/pub/OpenBSD/distfiles/ \
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ftp://ftp.netbsd.org/pub/NetBSD/packages/distfiles/
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MAINTAINER= joey@OpenBSD.ORG
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MAINTAINER= naddy@unix-ag.uni-kl.de
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NO_WRKSUBDIR= yes
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MANL= buffer.l
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MAN1= buffer.1
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.include <bsd.port.mk>
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@ -1,31 +1,42 @@
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diff -udr buffer.ORG/Makefile buffer/Makefile
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--- buffer.ORG/Makefile Wed Jul 14 17:59:17 1993
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+++ Makefile Thu Nov 16 20:09:23 1995
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@@ -8,7 +8,7 @@
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--- Makefile.orig Wed Jul 14 17:59:17 1993
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+++ Makefile Thu Mar 11 18:51:57 1999
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@@ -4,13 +4,13 @@
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# You should also add -DSYS5 for Ultrix, AIX, and Solarix.
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# Add -DDEF_SHMEM=n if you can only have n bytes of shared memory
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# (eg: -DDEF_SHMEM=524288 if you can only have half a meg.)
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-CFLAGS=
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+CFLAGS+=
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# Where to install buffer and its manual pages
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INSTBIN=/usr/local/bin
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-INSTBIN=/usr/local/bin
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-INSTMAN=/usr/man/manl
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+INSTMAN=/usr/local/man/manl
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+INSTBIN=${PREFIX}/bin
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+INSTMAN=${PREFIX}/man/man1
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# The manual page section (normally l or 1)
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S=l
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-S=l
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+S=1
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diff -udr buffer.ORG/buffer.c buffer/buffer.c
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--- buffer.ORG/buffer.c Wed Jul 14 17:59:17 1993
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+++ buffer.c Fri Nov 17 20:23:58 1995
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@@ -384,6 +384,7 @@
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}
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RM=/bin/rm
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ALL=README buffer.man Makefile buffer.c sem.c COPYING
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@@ -18,18 +18,14 @@
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all: buffer
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/* The interrupt handler */
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+void
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shutdown()
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{
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static int shutting;
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@@ -400,6 +401,7 @@
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}
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buffer: buffer.o sem.o
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- $(CC) -o buffer $(CFLAGS) buffer.o sem.o
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+ $(CC) -o buffer buffer.o sem.o
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/* Shutdown because the child has ended */
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+void
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child_shutdown()
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{
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/* Find out which child has died. (They may not be my
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clean:
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$(RM) -f *.o core buffer .merrs
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install: buffer
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- rm -f $(INSTBIN)/buffer
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- cp buffer $(INSTBIN)/buffer
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- chmod 111 $(INSTBIN)/buffer
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- rm -f $(INSTMAN)/buffer.$S
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- cp buffer.man $(INSTMAN)/buffer.$S
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- chmod 444 $(INSTMAN)/buffer.$S
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+ ${BSD_INSTALL_PROGRAM} buffer $(INSTBIN)/buffer
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+ ${BSD_INSTALL_MAN} buffer.man $(INSTMAN)/buffer.$S
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buffer.tar: $(ALL)
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$(RM) -f buffer.tar
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@ -1 +1 @@
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buffer sporadic binary I/O for faster tape use
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Buffer sporadic binary I/O for faster tape use.
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@ -1,27 +1,18 @@
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This is a program designed to speed up writing tapes on remote tape
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drives. Requirements are shared memory and locks which normally
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means that these are supported in your kernel.
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Buffer reads from standard input reblocking to the given blocksize
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and writes each block to standard output.
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[for FreeBSD, this means you MUST have a kernel with
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options SYSVSHM
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compiled in - markm]
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Internally, buffer is a pair of processes communicating via a large
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circular queue held in shared memory. This means you *must* have a
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kernel with
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Buffer has been tested under OpenBSD SunOS 4.0.*, SunOS 4.1.*, Solarix,
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HP-UX 7.0, and Gould UTX 2.1A (sv universe).
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options SYSVSHM
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The program splits itself into two processes. The first process reads
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(and reblocks) from stdin into a shared memory buffer. The second
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writes from the shared memory buffer to stdout. Doing it this way
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means that the writing side effectly sits in a tight write loop and
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doesn't have to wait for input. Similarly for the input side. It is
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this waiting that slows down other reblocking processes, like dd.
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compiled in. The reader process only has to block when the queue
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is full and the writer process when the queue is empty. Buffer is
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designed to try and keep the writer side continuously busy so that
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it can stream when writing to tape drives. When used to write tapes
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with an intervening network, buffer can result in a considerable
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increase in throughput.
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I run an archive and need to write large chunks out to tape regularly
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with an ethernet in the way. Using 'buffer' in a command like:
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tar cvf - stuff | rsh somebox "buffer > /dev/rst8"
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is a factor of 5 faster than the best alternative, gnu tar with its
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remote tape option:
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tar cvf somebox:/dev/rst8 stuff
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- Christian "naddy" Weisgerber
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<naddy@unix-ag.uni-kl.de>
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@ -1,2 +1,2 @@
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bin/buffer
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man/manl/buffer.l
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man/man1/buffer.1
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