The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/stand/copy.c

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    1 /*      $NetBSD: copy.c,v 1.13 2005/12/11 12:25:20 christos Exp $       */
    2 
    3 /*-
    4  * Copyright (c) 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 #ifndef lint
   34 __COPYRIGHT("@(#) Copyright (c) 1993\n\
   35         The Regents of the University of California.  All rights reserved.\n");
   36 #endif /* not lint */
   37 
   38 #ifndef lint
   39 #if 0
   40 static char sccsid[] = "@(#)copy.c      8.1 (Berkeley) 6/11/93";
   41 #else
   42 __RCSID("$NetBSD: copy.c,v 1.13 2005/12/11 12:25:20 christos Exp $");
   43 #endif
   44 #endif /* not lint */
   45 
   46 #define BSIZE   10240
   47 
   48 /*
   49  * Copy from from to to.  Intended for use in system installation.
   50  */
   51 main()
   52 {
   53         extern int errno;
   54         register int from, to, record, rcc, wcc, bsize = BSIZE;
   55         char buf[BSIZE];
   56 
   57         from = getfile("From", 0);
   58         to = getfile("To", 1);
   59         for (record = 0;; ++record) {
   60                 if (!(rcc = read(from, buf, bsize)))
   61                         break;
   62                 if (rcc < 0) {
   63                         printf("Record %d: read error, errno=%d\n",
   64                             record, errno);
   65                         break;
   66                 }
   67                 if (rcc != bsize) {
   68                         if (record == 0) {
   69                                 bsize = rcc;
   70                                 printf("Block size set from input; %d bytes\n",
   71                                     bsize);
   72                         } else
   73                                 printf("Record %d: read short; expected %d, got %d\n",
   74                                     record, bsize, rcc);
   75                 }
   76 #ifdef __vax__
   77                 /* For bug in ht driver. */
   78                 if (rcc > bsize)
   79                         rcc = bsize;
   80 #endif
   81                 if ((wcc = write(to, buf, rcc)) < 0) {
   82                         printf("Record %d: write error: errno=%d\n",
   83                             record, errno);
   84                         break;
   85                 }
   86                 if (wcc < rcc) {
   87                         printf("Record %d: write short; expected %d, got %d\n",
   88                             record, rcc, wcc);
   89                         break;
   90                 }
   91         }
   92         printf("copy completed: %d records copied\n", record);
   93 }

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