169 lines
6.1 KiB
C
169 lines
6.1 KiB
C
/*
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* COMPONENT_NAME: BLDPROCESS
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*
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* FUNCTIONS: defined
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* filecopy
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*
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* ORIGINS: 27,71
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*
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* This module contains IBM CONFIDENTIAL code. -- (IBM
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* Confidential Restricted when combined with the aggregated
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* modules for this product)
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* SOURCE MATERIALS
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*
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* (C) COPYRIGHT International Business Machines Corp. 1994
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* All Rights Reserved
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* US Government Users Restricted Rights - Use, duplication or
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* disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
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*/
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/*
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* @OSF_FREE_COPYRIGHT@
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* COPYRIGHT NOTICE
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* Copyright (c) 1992, 1991, 1990
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* Open Software Foundation, Inc.
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*
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* Permission is hereby granted to use, copy, modify and freely distribute
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* the software in this file and its documentation for any purpose without
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* fee, provided that the above copyright notice appears in all copies and
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* that both the copyright notice and this permission notice appear in
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* supporting documentation. Further, provided that the name of Open
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* Software Foundation, Inc. ("OSF") not be used in advertising or
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* publicity pertaining to distribution of the software without prior
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* written permission from OSF. OSF makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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* COPYRIGHT NOTICE
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* Copyright (c) 1992, 1991, 1990
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* Open Software Foundation, Inc.
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*
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* Permission is hereby granted to use, copy, modify and freely distribute
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* the software in this file and its documentation for any purpose without
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* fee, provided that the above copyright notice appears in all copies and
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* that both the copyright notice and this permission notice appear in
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* supporting documentation. Further, provided that the name of Open
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* Software Foundation, Inc. ("OSF") not be used in advertising or
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* publicity pertaining to distribution of the software without prior
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* written permission from OSF. OSF makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* Copyright (c) 1992 Carnegie Mellon University
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* All Rights Reserved.
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*
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* Permission to use, copy, modify and distribute this software and its
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* documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
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* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software_Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie Mellon
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* the rights to redistribute these changes.
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*/
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/*
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* HISTORY
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* $Log: filecopy.c,v $
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* Revision 1.7.5.2 1993/04/28 14:35:22 damon
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* CR 463. More pedantic changes
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* [1993/04/28 14:34:25 damon]
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*
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* Revision 1.7.5.1 1993/04/28 14:35:21 damon
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* *** Initial Branch Revision ***
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*
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* Revision 1.7.2.3 1992/12/03 17:20:49 damon
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* ODE 2.2 CR 183. Added CMU notice
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* [1992/12/03 17:08:09 damon]
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*
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* Revision 1.7.2.2 1992/12/02 20:26:03 damon
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* ODE 2.2 CR 183. Added CMU notice
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* [1992/12/02 20:23:14 damon]
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*
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* Revision 1.7 1991/12/05 21:04:52 devrcs
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* Added _FREE_ to copyright marker
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* [91/08/01 08:11:21 mckeen]
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*
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* rcsid/RCSfile header cleanup
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* [90/12/01 17:23:40 dwm]
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*
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* Revision 1.5 90/10/07 20:03:16 devrcs
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* Added EndLog Marker.
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* [90/09/28 20:08:57 gm]
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*
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* Revision 1.4 90/08/09 14:23:03 devrcs
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* Moved here from usr/local/sdm/lib/libsb.
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* [90/08/05 12:46:47 gm]
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*
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* Revision 1.3 90/06/29 14:38:29 devrcs
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* Moved here from defunct libcs library.
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* [90/06/23 14:20:58 gm]
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*
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* Revision 1.2 90/01/02 19:26:45 gm
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* Fixes for first snapshot.
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*
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* Revision 1.1 89/12/26 10:13:42 gm
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* Current version from CMU.
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* [89/12/23 gm]
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*
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* Rewritten for VAX; same as "filcopy" on PDP-11. Bigger buffer
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* size (20 physical blocks) seems to be a big win; aligning things
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* on block boundaries seems to be a negligible improvement at
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* considerable cost in complexity.
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* [79/11/20 sas]
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*
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* $EndLog$
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*/
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#ifndef lint
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static char sccsid[] = "@(#)81 1.1 src/bldenv/sbtools/libode/filecopy.c, bldprocess, bos412, GOLDA411a 1/19/94 17:41:02";
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#endif /* not lint */
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#if !defined(lint) && !defined(_NOIDENT)
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static char rcsid[] = "@(#)$RCSfile: filecopy.c,v $ $Revision: 1.7.5.2 $ (OSF) $Date: 1993/04/28 14:35:22 $";
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#endif
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/* filecopy -- copy a file from here to there
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*
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* Usage: i = filecopy (here,there);
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* int i, here, there;
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*
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* Filecopy performs a fast copy of the file "here" to the
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* file "there". Here and there are both file descriptors of
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* open files; here is open for input, and there for output.
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* Filecopy returns 0 if all is OK; -1 on error.
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*
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* I have performed some tests for possible improvements to filecopy.
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* Using a buffer size of 10240 provides about a 1.5 times speedup
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* over 512 for a file of about 200,000 bytes. Of course, other
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* buffer sized should also work; this is a rather arbitrary choice.
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* I have also tried inserting special startup code to attempt
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* to align either the input or the output file to lie on a
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* physical (512-byte) block boundary prior to the big loop,
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* but this presents only a small (about 5% speedup, so I've
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* canned that code. The simple thing seems to be good enough.
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*/
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#include <unistd.h>
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#include <ode/util.h>
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#include <sys/types.h>
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#define BUFFERSIZE 10240
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int
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filecopy ( int here, int there )
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{
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register int kount;
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char buffer[BUFFERSIZE];
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kount = 0;
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while (kount == 0 && (kount=read(here,buffer,BUFFERSIZE)) > 0)
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kount -= write (there,buffer,kount);
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return (kount ? -1 : 0);
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}
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